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Subject: Climate Change

1. Global Warming and Issues
2. All about Pollution

  • Going glacier gone: How Venezuela lost its last glacier, why this matters?

    Why in the News?

    Venezuela has likely become the first country to lose all its glaciers, with its last Humboldt glacier melting faster than anticipated. While scientists projected it to last another decade, its rapid melting exceeded expectations.

    Background:

    • Venezuela was home to six glaciers about 5,000 meters above sea level in the Andes mountains.
    • By 2011, five of them had vanished. Scientists expected the Humboldt glacier to last another decade.

    What are glaciers?

    • Glaciers are large masses of ice that form on land over long periods through the accumulation and compaction of snow. They flow like slow rivers and typically develop in regions with near-freezing temperatures, significant snowfall, and minimal summer melting.
    • According to the United States Geological Survey (USGS), they usually exist and form in areas where mean annual temperatures reach near the freezing point; winter precipitation leads to significant snow accumulations; and temperatures throughout the remaining year do not cause the complete loss of the previous winter’s snow accumulation.

    Why are Glaciers disappearing?

    • Greenhouse Gas Emissions: The burning of fossil fuels since the Industrial Revolution have released large amounts of GHGs like carbon dioxide and methane into the atmosphere.
    • Heat Trapping: The greenhouse gases act as a blanket, trapping heat in the atmosphere. While they allow sunlight to pass through, they prevent the heat from escaping back into space, leading to a rise in global temperatures.
      • The global average temperature has increased by at least 1.1 degrees Celsius since 1880 due to the skyrocketing emissions of GHGs in recent decades.
    • Consequences of Temperature Rise: The temperature rise has resulted in devastating consequences such as more frequent and intense heatwaves, floods, droughts, and a rise in sea levels.
    • Accelerated Melting: Glaciers, like ice cubes exposed to heat, are melting at accelerated rates due to the warmer temperatures caused by global warming.
    • Natural Climate Phenomena: Natural climate phenomena like El Nino can exacerbate glacier melting by causing abnormal warming of surface waters, as observed in the case of the Humboldt glacier in Venezuela.

    What are the impacts of Glacier Loss?

    • Freshwater Source: Glaciers are crucial sources of freshwater, especially during hot and dry periods, providing water for local communities, plants, and animals. Their disappearance would increase dependence on sporadic rainfall for freshwater supply.
    • Temperature Regulation: Glacial runoff helps regulate downstream water temperatures, particularly keeping them cooler. This is essential for many aquatic species that require cold water temperatures to survive, impacting the entire ecosystem.
    • Ecosystem Impact: Glacier loss directly affects aquatic species, disrupting the food web and potentially leading to declines in biodiversity.
    • Contribution to Sea Level Rise: Melting glaciers contribute to rising sea levels, although smaller glaciers like Venezuela’s Humboldt glacier may not substantially impact sea levels.
    • Cultural Impact: The loss of glaciers has significant cultural implications, particularly for communities where glaciers are part of their cultural identity. Activities such as mountaineering and tourism, which rely on glaciers, would be affected.
    • Tourism and Recreation: Glaciers are often major tourist attractions, drawing visitors for activities like mountaineering and sightseeing. The disappearance of glaciers would impact tourism and recreational activities in affected regions.

    Way Forward: 

    • International Cooperation: Foster collaboration among countries to tackle climate change on a global scale. Support international agreements such as the Paris Agreement, aimed at limiting global warming and reducing greenhouse gas emissions.
    • Protect and Preserve Glacier Areas: Establish and enforce conservation measures to protect glacier regions from further degradation. This can involve creating protected areas, implementing zoning regulations, and promoting sustainable tourism practices.

    Mains PYQ:

    Q Bring out the relationship between the shrinking Himalayan glaciers and the symptoms of climate change in the Indian sub-continent. (UPSC IAS/2014)

  • Explained Climate: Heatwaves and Climate Change

    Why in the News? 

    According to the Indian Meteorological Department (IMD), heatwave conditions are affecting either the smaller regions or the larger geographical areas in India at every 26 days of the month.

    What are the Heat Waves?

    • The “World Meteorological Organization” defines a heat wave as five or more consecutive days during which the daily maximum temperature exceeds the average maximum temperature by five degrees Celsius.
    • If the maximum temperature of any place continues to be more than 45 Degree Celsius consecutively for two days, it is called a heat wave condition.

    Heatwaves in India:       

    • Regional Observations: A place with a normal temperature of 40°C in summer is not experiencing a heatwave at 42-43°C, but another location with a normal temperature of 27-28°C is in a heatwave at 35°C.
      • Heatwaves are common in northern, central, and eastern India during summer. Heatwaves are becoming more frequent, intense, and prolonged due to climate change.
      • In February 2023 (winter month for India), several regions experienced heatwaves with maximum temperatures 5 to 11 degrees higher than normal. (with a mean temperature 1.36°C higher than normal)
    • Predictions and Records: The outlook for heatwaves this year is grim, with predictions of prolonged heatwaves lasting 10 to 20 days in some areas, compared to the usual 4 to 8 days.
      • In April 2023, Odisha experienced an 18-day heatwave, the second-longest in the state’s history.
      • Gangetic West Bengal recorded the highest number of heatwave days in any month over the last 15 years. Eastern India recorded its warmest April ever.
    • Upcoming Heatwave: The India Meteorological Department (IMD) forecasted a fresh spell of heatwaves starting over northwest India.

    Impact of Heatwaves:

    • Impact on Resource Availability:
      • Water Resources: It exacerbates water scarcity by drying up of water bodies, reducing water availability for agriculture and domestic use, and increasing competition for resources. This can lead to conflicts over water, affect irrigation practices, and impact water-dependent industries.
      • Energy Resources: It increases electricity demand for cooling purposes, leading to strain on power grids and potential blackouts. This can disrupt economic activities, affect productivity, and impact vulnerable populations.
    • Impact on Health:
      • Prolonged exposure to heat can lead to Dehydration and Cardiovascular and Respiratory diseases.
      • Rapid rises in heat gain can compromise the body’s ability to regulate temperature and can result in a cascade of illnesses, including heat cramps, heat exhaustion, heatstroke, and hyperthermia.
      • Health Ministry reported 264 heat-related deaths in the first six months of 2023. NCRB reported 730 heat-related deaths in the same year.

    However, data collected and maintained by IMD and NDMA (National Disaster Management Authority) showed a sharp decline in heat-related deaths ever since state governments and district administrations began implementing heat action plans.

    Mitigation of Heatwaves:

    • Need to establish an Early Warning System: The Inter-Agency Coordination needs to alert residents on predicted high and extreme temperatures. Who will do what, when, and how is made clear to individuals and units of key departments, especially for health.
    • Increase Public Awareness and Community Outreach: Disseminating public awareness messages on how to protect against the extreme heat – wave through social media and advertisements. Additionally, the government needs to aware the general public through Television programs the Do’s and Dont’s for heat-related illnesses.

    Conclusion: Need to improve collaboration with Non-governmental organizations and Civil society organizations to improve public spaces wherever necessary, improve water delivery systems in public areas, and other innovative measures to tackle heatwave conditions.

    Mains PYQ: 

    Q ‘Climate change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change? (UPSC IAS/2017)

  • ISRO’s Findings on Glacial Lake Dynamics in Himalaya

     

    Why in the News?

    • The Satellite images by ISRO show an increase in the size of Gepang Gath Lake amidst rising concerns about Climate Change.
    • Gepang Gath Lake (one of the biggest Glacial lakes in the Chandra basin) is located in the Western Indian Himalaya at the terminus of the Gepan Gath glacier.

    ISRO’s Findings on Glacial Lakes in Himalayas 

    Expansion of Glacial Lakes

    • During 2016-17, total of 2,431 lakes larger than 10 hectares were identified, among which 676 were identified as glacial lakes. Notably, these 676 glacial lakes have shown significant expansion since 1984. A staggering 89% (601 lakes) of the expanding lakes have more than doubled in size since 1984.
    • Regional Distribution: Out of these expanding glacial lakes, 130 are situated within India. Among these, 65 lakes are located in the Indus River basin, seven in the Ganga River basin, and 58 in the Brahmaputra River basin.
    • The derived analysis from the Satellite provides valuable insights for understanding glacial lake dynamics.
    • It is essential for assessing environmental impacts and developing strategies for Glacial Lake Outburst Floods (GLOF) risk management and climate change adaptation in glacial environments.

     

    What are Glacial Lakes?

     

      • Glacial lakes are bodies of water formed in depressions on the surface of glaciers or in moraines left behind by retreating glaciers.
      • Glacial lakes were categorized based on their formation process into four broad categories: 
        • Moraine-dammed, 
        • Ice-dammed, 
        • Erosion, and 
        • Other glacial lakes.
      • Among the expanding lakes, the majority are Moraine-dammed (307), followed by Erosion (265), other (96), and Ice-dammed (8) glacial lakes.
      • Formation Process: Glacial lakes form through the accumulation of meltwater from the melting ice of glaciers. As glaciers move, they carve out depressions in the landscape, which may fill with water to form lakes.
        • When glaciers retreat, they leave behind moraines, which can act as natural dams, trapping meltwater and forming lakes.
      • Characteristics:
        • Vary in size, depending on the size and activity of the glacier.
        • Found in mountainous regions and polar areas where glaciers are present.
        • The primary source of water is melting glacial ice, precipitation and runoff.
    • Significance of Glacial Lakes:
      • Glacial lakes play a crucial role in regulating water flow in glacier-fed rivers, particularly during the dry season.
      • Provides habitat for unique aquatic species adapted to cold, high-altitude environments.
      • Contributes to landscape evolution and the formation of landforms such as cirques and tarns.
    • Present Ecological Challenges:
      • Glacial Outburst Floods: The sudden release of water from glacial lakes, known as glacial lake outburst floods (GLOFs), can pose significant hazards to downstream communities and infrastructure. Ex. Chamoli Disaster.
      • Rapid Expansion: Glacial lakes can rapidly expand due to the increased melting of glaciers, leading to the risk of flooding and landslides in surrounding areas.

    Important Glacial Lakes in India:

    • Deosai National Park (Jammu and Kashmir): Known for its numerous glacial lakes.
    • Gangbal Lake (Jammu and Kashmir): At the base of Mount Haramukh.
    • Zanskar Valley Lakes (Jammu and Kashmir): Includes Tsomoriri Lake, Tsokar Lake, and many others.
    • Roopkund Lake (Uttarakhand): Known for the human skeletons found at its bottom.
    • Sarson Patal Lake (Uttarakhand): Within the Nanda Devi Biosphere Reserve.
    • Deoria Tal (Uttarakhand): Offering stunning views of the surrounding peaks.
    • Hemkund Lake (Uttarakhand): Near the Hemkund Sahib Gurudwara.
    • Kedar Tal (Uttarakhand): At the foot of the Thalay Sagar peak.
    • Nanda Devi East Base Lake (Uttarakhand): Offering views of the Nanda Devi peaks.
    • Vasuki Tal (Uttarakhand): Near the Chaturangi Glacier.
    • Chandratal Lake (Himachal Pradesh): Known for its crescent shape.
    • Suraj Tal (Himachal Pradesh): Close to the Baralacha La pass.
    • Rupin Lake (Himachal Pradesh): Near the Rupin Pass.
    • Gurudongmar Lake (Sikkim): One of the highest lakes in the world.

     

    PYQ:

    [2020] Siachen Glacier is situated to the

    (a) East of Aksai Chin

    (b) East of Leh

    (c) North of Gilgit

    (d) North of Nubra Valley

     

     

  • [22 April 2024] The Hindu Op-ed: Preparing India for water stress, climate resilience

    Mains PYQ Relevance: 
    Q) Suggest measures to improve water storage and irrigation system to make its judicious use under depleting scenarios. (UPSC IAS/2020)
    Q) What is water stress? How and why does it differ regionally in India? (UPSC 2019)

    Prelims

    Q) If National Water Mission is properly and completely implemented, how will it impact the country?  (UPSC 2012)
    1. Part of the water needs of urban areas will be met through recycling of waste water.The water requirement of coastal cities with inadequate alternative sources of water will be met by adopting appropriate technologies that allow for use of ocean water.
    2. All the rivers of Himalayan origin will be linked to the rivers of peninsular India.
    3. The expenses incurred by farmers for digging bore wells and for installing motors and pump sets to draw groundwater will be completely reimbursed by the Government.
    Select the correct answer using the codes given below:

    (a) 1 only
    (b) 1 and 2 only
    (c) 3 and 4 only
    (d) 1, 2, 3 and 4

    Note4Students: 

    Prelims: World Earth Day;

    Mains: Environmental Governance;

    Mentor comments: Prolonged water stress can have devastating effects on public health and economic development. More than two billion people worldwide lack access to safe drinking water; and nearly double that number more than half the world’s population—are without adequate sanitation services. Without better water management, population growth, economic development and climate change are poised to worsen water stress. 

    Let’s learn

    —

    Why in the News?

    On account of Earth Day (April 22), India needs to be prepared for water stressed challenges. Recently, IMD has also predicted a hotter summer and longer heat waves from April to June. 

    Present Scenario:

    India houses 18% of the world’s population (2.4% of the earth’s surface area), having just 4% of global freshwater resources. 

    Nearly half of its rivers are polluted, and 150 of its primary reservoirs are at just 38% of their total live storage capacity. 

    India is the largest user of groundwater in the world. 

    The Present challenge before the Indian Govt. to combat Climate Change:

    • Heavy Investment: India has invested heavily in disaster preparedness, but the nature of climatic shocks will continue to change. There will be sudden shocks (heavy rainfall, rapid declines in water availability) as well as slow onset but periodic stresses (reduced water retention in soils, changes in trend lines for rainfall). 
    • Lack of Preparedness: India is programmed to consider acute stresses (heat, water, or extreme weather) as temporary, to be handled often as disaster relief. Seasonal disaster preparedness and responses are no longer sufficient to tackle climate risks. 
    • High Interdependence: The climate is directly related to the economy, and the economic production frontier will expand or shrink depending on the intersections between land, food, energy, and water. Climate action cannot be left to a few particular sectors.

    Relationship between Water and the Economy

    • A key component of the Economy:
      • Agriculture: The India Employment Report 2024 shows that Agriculture still employs around 45% of the population and absorbs most of the country’s labor force. Precipitation is the primary source of soil moisture and both blue (rivers and aquifers) water and green (vegetation) water impact the food we grow.
    • Allied Sectors: The Council on Energy, Environment, and Water (CEEW) study showed that monsoon rainfall is changing patterns in India, with 55% of ‘tehsils’ or sub-districts seeing a significant increase of more than 10% in southwest monsoon rainfall. 
    • A key component of the Clean Energy Transition: 
      • Green hydrogen: It is seen as a crucial pillar for decarbonizing industry and long-distance transport sectors. The Green hydrogen is produced using water and electricity sourced from renewables. Pumped storage hydropower which acts as a natural battery is an important component of a clean but reliable power system. 
      • If there is a climate crisis, it will impact hydrometeorological disasters. According to the UN World Water Development Report 2020, almost 75% of natural disasters in the last two decades were related to water. 

    What does the Effective Water Governance need?

    • Needs to recognize Interactions with Food and Energy Systems: Although India has adopted several policies, most do not recognize this nexus while planning or at the implementation stage.
      • For example, while the scaling up of green hydrogen is desirable, the link with water availability is not always considered. 
      • Similarly, the impact of scaling up solar irrigation pumps on groundwater levels must be analyzed to deploy the technology where there is an optimal mix of solar resources and higher groundwater levels. 
    • Need to identify the Food-Land-Water nexus: Policies need to be designed differently, based on local evidence and community engagement. India needs to focus on the judicious use of blue and green water through water accounting and efficient reuse.
      • For Example, the National Water Mission targets increasing water use efficiency by 20% by 2025. 
      • Similarly, the Atal Mission on Rejuvenation and Urban Transformation (AMRUT) 2.0 calls for reducing non-revenue water, which is lost before it reaches the end user, to less than 20% in urban local bodies. 
    • Need for Water Accounting Principles: The present policies and programs are not backed by any baseline set using water accounting principles that will help quantify freshwater use. It is essential for promoting water use efficiency and creating incentives for investments in treated wastewater reuse.
      • For example, in the absence of water use data for the reference year, it is difficult to quantify the potential water saving in one sector, such as agriculture.
    • Need to leverage financial tools: Financial commitments for climate change adaptation in the water and agriculture sectors are still relatively small. It is necessary to raise money for climate adaptation in the water sector.
      • For Example, India’s Green Credit Programme has the potential to partially bridge the adaptation funding gap by encouraging investment in wastewater treatment, desalination plants, and agricultural extension services. 
      • Similarly, investments in India under Corporate Social Responsibility, there is a potential to leverage about ₹12,000 crore worth of investments every year.

    Conclusion: A water-secure economy is the first step towards a climate-resilient one. It is possible to make a start by pursuing more coherence in water, energy and climate policies, creating data-driven baselines to increase water savings, and enabling new financial instruments and markets for adaptation investments. 

  • Sustaining our Earth and Nourishing our Bodies

    Why in the news? 

    The women from a Self-Help Group in Kanker district (Chhattisgarh), have spared 10 decimals of land for multi-layer farming to mitigate land degradation and under-nutrition, and to secure round-the-year incomes.

    How does the relationship between Climate Change and Nutrition result in Food insecurity?

    • Impact on Food Chain: Climate change affects food value chains, agricultural yields, nutritional quality, food access, and energy-intensive processes, exacerbating existing challenges in food security and nutrition.
    • Lack of Access: The Rome Declaration on Nutrition highlights the global challenges in providing sufficient, safe, diverse, and nutrient-rich food for everyone, with approximately 800 million people lacking reliable access to food and two billion suffering from iron and zinc deficiencies.
    • Disparities in Diets: Disparities in production systems and individual dietary choices lead to populations being unable to maintain balanced diets, contributing to malnutrition and the prevalence of non-communicable diseases.
    • Results into Gender Disparities: Women are disproportionately affected by climate change and poor nutrition, but gender-just food systems, where women have equal rights and access to resources, contribute to resilience against shocks like drought.

    Suggestive measures for reducing Emissions

    • Plant-Based Diet: A diet higher in plant-based foods is more environmentally sustainable than one with more animal foods. Substituting animal products with plant-based meats and dairy alternatives can lower emissions.
    • Mitigating CO2 Concentration: Higher atmospheric CO2 concentrations can lead to lower concentrations of protein, iron, and zinc in crops, highlighting the need to mitigate climate change impacts on food nutrition.
    • Value-Chain Approach: Adopting a value-chain approach can optimize dietary choices while lowering emissions, benefiting communities at the household level.
      • For Example, Initiatives like the Millet Mission in Chhattisgarh aim to promote millet cultivation, showcasing its nutritional value, low water footprint, climate resilience, and potential to address both nutritional and environmental concerns.
    • Scaling up diversified Food Production: Scaling up and decentralizing diversified food production systems can reduce emissions by promoting underutilized indigenous foods and improving resilience to climate change.
    • Monitoring Emissions: Continuous and extensive monitoring of emissions linked to food production and distribution is necessary, with accessible assessment tools for local communities to actively participate in emission reduction efforts.

    Conclusion: Crops grown in regenerative and sustainable systems tend to have higher levels of vitamins, minerals, antioxidants, and other beneficial phytochemicals compared to conventionally grown counterparts. By prioritizing soil health and biodiversity, regenerative and sustainable agriculture systems government and farmers can collaboratively promote nutrient-dense foods that nourish our bodies and support overall health and well-being.

    Mains PYQ:

    Q Climate change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change? (UPSC IAS/2017)

  • [10 April 2024] The Hindu Op-ed: The climate crisis is not gender neutral

    [10 April 2024] The Hindu Op-ed: The climate crisis is not gender neutral

    PYQ Relevance:

    Mains: 

    Q)  ‘Climate change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change? (UPSC CSE 2017) 

    Q) Describe the major outcomes of the 26th session of the Conference of the Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCCC). What are the commitments made by India in this conference? (UPSC CSE 2021) 

    Note4Students: 

    Prelims: NA;

    Mains: Social Issues; Women Issues;

    Mentor comments: Women are very effective at mobilizing communities during disasters.  They are at the frontline in moving forward with recovery. Women further hold key knowledge of most of the Natural Resources and their management. Hence, they can be the key actors in Climate Adaptation and Mitigation.

    However, women and girls have less access to climate information, early warnings, agricultural advisory services, mobile phone technology, and financial credit. For example, more women than men died in the Indian Ocean Tsunami in 2004 because they were less likely to know how to swim, and long clothing hampered their movement. Now, we have no time to lose as we are standing at the intersection of inequality and climate change, and our strategies must reflect the urgency of the times.

    Let’s learn. 

    —

    Why in the News?

    According to the United Nations Development Programme (UNDP), women and children are 14 times more likely than men to die in a disaster. 

    • Tropical countries in the past decade are likely to face unprecedented heatwaves.
    • The SC has just recently ruled that people have a right to be free from the adverse effects of climate change, and the right to a clean environment is already recognized as a Fundamental Right within the ambit of the ‘Right to Life’.

    Why Women are more vulnerable due to Climate Change Impacts?

    • High Sector-Specific Dependency: Agriculture is the most important livelihood source for women in India, particularly in rural India. Climate-driven crop yield reductions increase poverty.
    • Men Vs. Women Scenario: Within small and marginal landholding households, while men face social stigma due to unpaid loans (leading to migration, emotional distress, and sometimes even suicide), women experience higher domestic work burdens, worse health, and greater intimate partner violence. 
    • The Scenario in Drought-prone Areas: National Family Health Survey 4 and 5 data showed that women living in drought-prone districts were more underweight, experienced more intimate partner violence, and had a higher prevalence of girl marriages. 
    • Poverty and Insecurity: The increasing food and nutritional insecurity, work burdens and income uncertainties lead not only to poor physical health but also impact their mental health and emotional well-being. 

    How do the Extreme Climatic Events result in gender-based violence?

    • Reduced Self-Care: Subsequent changes in water cycle patterns severely impact access to safe drinking water, which increases the drudgery and reduces the time for productive work and self-health care of women and girls.
    • Maternal Issues: Prolonged heat is particularly dangerous for pregnant women (Chances of Preterm Birth/ Eclampsia), young children, and the elderly. 
    • Cardiovascular disease: Air Pollution affects women’s health, causing respiratory and cardiovascular disease, and also the unborn child, impairing its physical and cognitive growth. One of the most worrying aspects is its impact on the growing brain.
      • Emerging data from cohort studies in India show that the risk of lung cancer increases by 9% due to PM2.5
    Why does Climate Action need Women?

    Improve Agri-Productivity: Women increased their agricultural yields by 20% to 30% when provided with the same access to resources as men.

    Enhanced Conservation: Tribal and rural women have been at the forefront of environmental conservation.

    Empowerment: Giving women and women collectives (Self-help Groups and Farmer Producer Organisations) the knowledge, tools, and access to resources would encourage local solutions to emerge.

    Reducing CO2 emissions is crucial:

    • Creating Cooler Environments: Immediate action is needed to protect vulnerable groups from heatwaves, such as providing cooling spaces and adjusting work schedules.
      • Planting trees and vegetation can create a cooler and more sustainable environment.
    • Upgrading Infrastructure: Urban planning can help mitigate heatwave and drought impacts, such as increasing green spaces and using heat-resistant materials.
      • Improving early warning systems for heatwaves, creating more cooling shelters and green spaces, and promoting awareness campaigns about heatwave risks and safety measures are crucial for preparedness and mitigation.
    • Water Conservation: Traditional rainwater harvesting and storage systems in India can be revived using geographic information systems and local planning.
      • Improving water use efficiencies, and reusing treated wastewater can help reduce the strain on freshwater resources.
    • Technological Interventions: The M.S. Swaminathan Research Foundation in a few districts of Tamil Nadu showed that by using Geographic Information Systems (GIS), Panchayats could improve the groundwater crisis.
      • It identified vulnerabilities and climate hazards and developed a local plan to improve water access by directing government schemes and resources. 

    https://www.thehindu.com/opinion/lead/the-climate-crisis-is-not-gender-neutral/article68047470.ece

    https://wmo.int/media/news/climate-crisis-not-gender-neutral

  • Why Uttarakhand govt wants to evaluate the risk of Glacial Lake Outburst Floods

    Why in the news? 

    Recently, the Uttarakhand government has constituted two teams of experts to evaluate the risk posed by five potentially hazardous glacial lakes in the region.

    Context:

    • The Hazardous Glacial Lakes are prone to Glacial Lake Outburst Floods (GLOFs), the kind of events that have resulted in several disasters in the Himalayan states in recent years.
    • The National Disaster Management Authority (NDMA), which operates under the Union Ministry of Home Affairs, has identified 188 glacial lakes in the Himalayan states that can potentially be breached because of heavy rainfall. Thirteen of them are in Uttarakhand.

    About Glacial Lake Outburst Floods (GLOFs):

    GLOFs are disaster events caused by the abrupt discharge of water from glacial lakes  large bodies of water that sit in front of, on top of, or beneath a melting glacier. As a glacier withdraws, it leaves behind a depression that gets filled with meltwater, thereby forming a lake. Example: 4 october 2023 GLOFs in Sikkim.

    Factors behind the GLOFs:

    • Avalanches or Landslides: Incidents such as avalanches or landslides can also impact the stability of the boundary around a glacial lake, leading to its failure, and the rapid discharge of water.
    • Due to climate change: Rising surface temperatures across the globe, including India, have increased the risk of GLOFs. Studies have shown that around 15 million people face the risk of sudden and deadly flooding from glacial lakes, which are expanding and rising in numbers due to global warming.
    • Rapid infrastructure development in vulnerable areas has also contributed to the spike in such incidents.
    • Sizable ice chunks in the lake: GLOFs can be triggered by various reasons, including glacial calving, where sizable ice chunks detach from the glacier into the lake, inducing sudden water displacement.

    Why are GLOFs under the spotlight?

    • Increased Frequency of GLOFs: Since 1980, GLOFs have become more frequent in the Himalayan region, particularly in southeastern Tibet and the China-Nepal border area. This indicates a concerning trend of glacial melting and lake formation as per Institute of Tibetan Plateau Research in China
    • Extent of Potential Risk: The analysis by  Institute of Tibetan Plateau Research in China suggests that approximately 6,353 sq km of land could be at risk from potential GLOFs.
    • Regional Impacts: Another analysis conducted by Caroline Taylor, Rachel Carr, Stuart Dunning (Newcastle University, UK), Tom Robinson (University of Canterbury, New Zealand), and Matthew Westoby (Northumbria University, UK) indicates that GLOFs are not just a localized issue but have broader regional impacts.
      • Around 3 million people in India and 2 million in Pakistan are identified as facing the risk of GLOFs, highlighting the potential humanitarian consequences of these events.

    What is the situation in Uttarakhand?

    • Past GLOF events: Uttarakhand has experienced two major GLOF events in recent years. The first occurred in June 2013, affecting large parts of the state, particularly the Kedarnath valley, resulting in significant loss of life.
      • The second event happened in February 2021 in Chamoli district, leading to flash floods due to the bursting of a glacier lake.
    • Categorization of Glacial Lakes: Uttarakhand has 13 glacial lakes categorized into three risk levels: ‘A’, ‘B’, and ‘C’.
      • Five highly sensitive lakes fall into the ‘A’ category, including Vasudhara Tal in the Dhauliganga basin (Chamoli district), Maban Lake, Pyungru Lake, and two unclassified lakes in Pithoragarh district.
    • Size and Elevation of High-Risk Lakes: The lakes in the ‘A’ category have areas ranging from 0.02 to 0.50 sq km and are situated at elevations between 4,351 to 4,868 meters above sea level. These characteristics make them particularly vulnerable to glacial lake outburst events.
    • Impact of Rising Temperatures: A 2021 study by the Potsdam Institute for Climate Research (PIK) and The Energy and Resources Institute (TERI) suggests that rising surface temperatures could worsen the situation in Uttarakhand.
      • The state’s annual average maximum temperature may increase by 1.6-1.9 degrees Celsius between 2021-2050, potentially exacerbating the risk of GLOFs.

    Conclusion: Uttarakhand government forms expert teams to assess risk from 5 hazardous glacial lakes prone to GLOFs. With rising temperatures and past disasters, urgent action is needed to mitigate potential catastrophic flooding.

  • Negative Leap Second: Climate Change’s Impact on Timekeeping

    Why in the news?

    • A recent publication in the science journal Nature highlights how climate change-induced melting of glaciers and ice sheets is altering the Earth’s rotation, potentially disrupting our timekeeping systems.
    • Leap seconds were added almost every year between 1972 and 1999 to adjust for Earth’s slowing rotation. But there have only been four added in the last 23 years, and the last time a leap second was added was in 2016.

    What is a Leap Second?

    • A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC) in order to synchronize atomic time with astronomical time, particularly with the Earth’s rotation.
    • The purpose of adding or subtracting a leap second is to keep International Atomic Time (IAT) (which is extremely precise) in close alignment with astronomical time, which is based on the Earth’s rotation and is subject to slight variations.

    There are two types of leap seconds:

    1. Positive Leap Second:
      • A positive leap second is added to UTC when the Earth’s rotation slows down slightly, causing the length of a day to exceed 86,400 seconds.
      • This type of leap second is necessary to bring UTC back into alignment with the Earth’s rotational time.
      • Positive leap seconds are rare and occur less frequently than negative leap seconds.
    2. Negative Leap Second:
      • A negative leap second, also known as a deletion or removal of a second, occurs when the Earth’s rotation speeds up slightly, causing the length of a day to be less than 86,400 seconds.
      • Negative leap seconds are extremely rare and have only been proposed but never implemented. They are considered hypothetical and have not yet been needed to adjust UTC.
      • The concept of negative leap seconds is controversial and requires international agreement and coordination among timekeeping organizations.

    International Atomic Time (TAI)

     

    • TAI is a high-precision time scale based on the weighted average of atomic clocks (usually involving caesium or rubidium atoms) from various laboratories around the world.
    • It is one of the primary time scales used for scientific and technical purposes, providing a continuous and uniform time reference that is independent of the Earth’s rotation.
    • TAI is maintained since 1958 by the International Bureau of Weights and Measures (BIPM) in Paris, France.
    • Unlike UTC, which is adjusted periodically to account for the Earth’s irregular rotation, TAI is a continuous time scale that does not include any corrections for Earth’s rotation.

     

    How Climate Change causes Negative Leap Second?

    •  Glacial Melting: Accelerating melt rates in Greenland and Antarctica are redistributing weight across the planet, causing a slight deceleration in the Earth’s rotation.
    • Historical Context: Timekeepers have periodically added leap seconds to clocks worldwide to account for the Earth spinning faster than usual, with 27 instances recorded since the 1970s.
    • Planned Adjustment: The proposed “negative leap second” adjustment, scheduled for 2026, may be postponed until 2029 or later due to the recent deceleration in the Earth’s rotation.Top of Form

    Practice MCQ:

    What is a Leap Second?

    (a) It is a periodic adjustment added to International Atomic Time (TAI) to compensate for irregularities in Earth’s rotation.

    (b) It is an extra second added to Coordinated Universal Time (UTC) to synchronize atomic time with astronomical time.

    (c) It is the time lag measured by the atomic clocks in Outer Space-Time conditions.

    (d) It is a term used to describe the synchronization of atomic clocks with the oscillations of subatomic particles.

  • How much should developed countries pay for climate action?

    Why in the news? 

    As the climate bomb ticks, Global Climate negotiators are working on a new global climate finance budget ahead of COP29 in Baku this November.
    • In 2009, developed countries committed to paying $100 bn every year. However, they failed to do so.

    Context:

    • The 2022 climate change conference (COP 28) held in Sharm el-Sheikh decided to establish a Loss and Damage Fund. 
    • These funds would work as a “transition away” from fossil fuels, and a promise to triple global renewable energy capacity by 2030.
    • On March 22, a two-day meeting was concluded in Copenhagen, Denmark, the first minister-level climate meeting for this year, and a ‘New Collective Quantitative Goal’ was finalized.

    What is the New Collective Quantitative Goal (NCQG)?

    • NCQG represents the yearly sum that developed countries must gather from 2025 onward to finance climate action in developing nations.
    • It has to be higher than the $100 billion that developed countries, collectively, had promised to raise every year from 2020, but had failed to deliver.

     

    Collective Funds need to ensure effective Climate Action:

    • UN Climate Change Report (2021): According to a report by UN Climate Change, developing countries would need approximately $6 trillion annually between 2021 and 2030 to implement their climate action plans.
    • Estimation in Sharm el-Sheikh Agreement: The final agreement at Sharm el-Sheikh included estimates suggesting that a global transition to a low-carbon economy could require about $4-6 trillion annually until 2050.
    • Global GDP Percentage: While these estimates vary, an approximate range of $5-7 trillion annually is suggested to effectively address climate change. This would require deploying about 5-7% of the global GDP towards climate action.
    • Renewable Energy Capacity: Meeting the target of tripling renewable energy capacity, as agreed in Dubai, is estimated to cost $30 trillion by 2030, according to the International Renewable Energy Association (IRENA).

    Prospects for a Realistic New Annual Climate Finance Target:

    • Current Funding Shortfall: The UNFCCC, responsible for organizing climate meetings and facilitating the implementation of climate agreements, is facing a severe shortage of funds. Its budget is currently less than half funded, which hampers its ability to fulfill its mandate effectively.
    • Call for Increased Climate Finance: There is a call for developed countries to commit to significantly higher levels of climate finance. India, for instance, has called for the New Collective Quantitative Goal (NCQG) to be set at least at $1 trillion per year 
    • Need of Innovative Funding Sources: Simon Stiell, Executive Secretary of UN Climate Change, emphasized the need for innovative funding sources to meet the substantial financial requirements for climate action.  
    • Dependence on Contributions: The UNFCCC relies heavily on contributions from countries and voluntary organizations to carry out its work. 

    How will this money be used?

    • On-time Delivery: Ensuring effective delivery of the new funding is essential for achieving meaningful impact.
    • Transparent and Inclusive Monitoring: Developing countries emphasize the need for a transparent and inclusive process to monitor and measure the agreed-upon amount.  
    • Distribution Across Needs: The new funding is distributed across different climate action areas such as mitigation, adaptation, and addressing loss and damage as per need 

    Conclusion: Developed countries must commit to higher climate finance, possibly $1 trillion annually, for effective action. Innovative funding sources and transparent monitoring are crucial for impactful distribution across climate action areas.

    Mains PYQs

    Q  Clean energy is the order of the day.’ Describe briefly India’s changing policy towards climate change in various international fora in the context of geopolitics.(UPSC IAS/2022)

    Q ‘Climate change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change? (UPSC IAS/2017)

     

  • Navigating the global Waterscape, its challenges

    Why in the news? 

    Today, March 22, 2024, is the 31st World Water Day, with the theme, “Leveraging water for peace”

    Context-

    • In the context of climate change-related pressures, the world also needs to foster improved cooperation over water-sharing
    • The global challenge for securing access to clean water persists for about two billion people and its demand keeps rising. Beyond threatening our basic human needs, this scarcity also risks our collective prosperity and peace.

    Water diplomacy in a time of extremities-

    • Climate Crisis Impact: Meteorological extremities like heat waves and floods exacerbate concerns about the climate crisis. In India, erratic monsoons affect agriculture, crucial for the $3 trillion economy.
    • Need for Improved Cooperation: Amid climate change pressures, fostering cooperation over water-sharing and embracing universal principles of International Water Law is imperative.
    • Water Diplomacy: Effective governance of shared waters and sustainable water use are essential for better water diplomacy, promoting peace and stability regionally and internationally.
    • Collaborative Governance: Collaborative governance ensures equitable water allocation among nations, fostering regional stability and peace.
    • Inclusive Approaches: Water diplomacy should include indigenous and local communities’ cross-border networks and involve civil society and academic networks to prevent, mitigate, and resolve water-related disputes.
    • Water Quality Data Shortage: There’s a general shortage of water quality data globally, with a significant urban-rural divide, highlighting the need for better access to basic drinking water services, particularly in rural areas.

    Addressing rural India’s needs-

    70% of India’s rural population relies on water for household activities, with agriculture being the primary livelihood source. Globally, agriculture accounts for 70% of freshwater use.

    • Water Accessibility: Improved water accessibility in rural areas can lead to positive outcomes in health, education, employment, and basic human needs and dignity.
    • Water Investments: Increased water investments in rural areas can yield positive outcomes across various sectors, benefiting communities in multiple ways.
    • AI Technology in Agriculture: The efficient use of emerging artificial intelligence (AI) technology in agriculture can aid in water conservation efforts. AI can help tackle crop and food loss, minimize chemical and fertilizer usage, and optimize water usage for sustainable and productive outputs.

    The issue of transboundary waters

    • Water Pollution: Transboundary rivers like the Meghna, Brahmaputra, Ganga, and Indus are experiencing worsening water pollution, posing significant environmental and health risks to communities relying on these water sources.
    • Lack of Governance: There is a need for sophisticated cross-border water governance to address issues related to equitable water allocation, pollution control, and sustainable management of shared water resources among neighboring countries.
    • Cooperation Challenges: Despite the importance of transboundary water cooperation, many countries face challenges in reaching agreements and implementing effective mechanisms for managing shared water resources. Disputes over water usage, infrastructure development, and environmental impacts hinder cooperation efforts.
    • Sustainable Development Goals (SDGs): Transboundary water management is crucial for achieving the SDGs, particularly Goal 6 (Clean Water and Sanitation). However, inadequate cooperation and governance frameworks pose obstacles to fulfilling SDG targets related to water security, environmental sustainability, and poverty alleviation.
    • Peace and Security: Scarcity of freshwater in transboundary river basins can exacerbate tensions and conflicts among riparian states. Effective management and cooperation on shared water resources are essential for promoting regional stability and preventing water-related conflicts.
    • Ecosystem Services: Transboundary rivers support diverse ecosystems and provide essential ecosystem services such as water purification, habitat for biodiversity, and regulation of water flow. Pollution and overexploitation of these waters threaten the integrity of ecosystems and the services they provide.
    • Climate Change Impacts: Climate change exacerbates challenges related to transboundary water management by altering precipitation patterns, increasing the frequency and intensity of extreme weather events, and affecting water availability and quality. Adaptation and resilience-building measures are needed to address climate-related risks in transboundary river basins.

    Suggestive Measures to Resolve Transboundary Water Issues:

    • Strengthen Governance Structures: Establish comprehensive cross-border water governance frameworks, including bilateral or multilateral agreements, to facilitate equitable water allocation, pollution control, and sustainable management of shared water resources.
    • Enhance Cooperation Mechanisms: Foster dialogue and collaboration among riparian states through platforms such as joint commissions, river basin organizations, and diplomatic negotiations to address disputes and promote mutual understanding of water management challenges.
    • Implement Integrated Water Resource Management (IWRM): Adopt IWRM approaches that consider social, economic, and environmental factors to promote sustainable development and ensure the efficient use of transboundary water resources while minimizing negative impacts on ecosystems and communities.
    • Enhance Monitoring and Data Sharing: Improve monitoring systems and data-sharing mechanisms to assess water quality, quantity, and usage trends in transboundary river basins. Enhanced transparency and information exchange can facilitate informed decision-making and cooperation among riparian states.
    • Promote Community Engagement: Involve local communities, indigenous groups, and civil society organizations in decision-making processes related to transboundary water management. Empowering stakeholders at the grassroots level can enhance accountability, foster cooperation, and promote sustainable practices.
    • Strengthen Legal Frameworks: Develop and enforce robust legal frameworks at national and international levels to regulate transboundary water resources effectively. Clear and enforceable laws can provide a basis for resolving disputes and ensuring compliance with agreed-upon water management principles.
    • Build Climate Resilience: Implement adaptation measures to address climate change impacts on transboundary water resources, such as enhancing water storage infrastructure, promoting water-efficient technologies, and integrating climate resilience into water management strategies.

    Conclusion-

    Navigating the global waterscape’s challenges requires robust governance, enhanced cooperation, and sustainable practices. By addressing transboundary water issues collectively, we can promote peace, ensure water security, and achieve sustainable development goals.

    Mains PYQ-

    Q- The interlinking of rivers can provide viable solutions to the multi-dimensional inter-related problems of droughts, floods, and interrupted navigation. Critically examine. (UPSC IAS/2020)