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Subject: Environment

  • The Indian Himalayan Region needs its own EIA

    What’s the news?

    • In light of the recent Teesta dam breach in Sikkim and floods in Himachal Pradesh, the potential negative impact of developmental activities on our ecology, especially in the mountains, is evident.

    Central idea

    • The recent Teesta dam breach in Sikkim and devastating floods and landslides in Himachal Pradesh have underscored the destructive consequences of our current development model. It is crucial to evaluate the environmental repercussions of significant human endeavors in order to strike a balance between development and ecological preservation.

    What is EIA?

    • Definition: EIA, or Environment Impact Assessment, is a process defined by the United Nations Environment Programme (UNEP) to gauge the environmental, social, and economic impacts of a project before implementation.
    • Functions: It contrasts various project alternatives, predicts environmental consequences, and suggests appropriate mitigation strategies.

    EIA’s Historical Development in India

    • 1976–77: A precursor to EIA began with an evaluation of river valley projects.
    • 1994: The Union Ministry of Environment, Forests, and Climate Change introduced the first EIA notification.
    • 2006: The 2006 notification decentralized the process, allowing states to issue EC (Environmental Clearance) in specific cases. This policy was later amended for refinement.
    • The 2020 draft EIA was criticized as favoring industries while neglecting ecological concerns.

    EIA 2006 Notification’s Scope and Limitations

    • It establishes the procedure for giving EC.
    • Only specific projects listed in the attached schedule require an EC.
    • It categorizes projects (e.g., mining, power generation). However, the threshold limits for requiring an EIA remain consistent nationwide.

    The Potential of EIA for Sustainable Development

    • Informed Decision-Making: EIA provides data for informed choices that balance development with environmental concerns.
    • Early Risk Identification: EIA identifies and mitigates potential environmental harm, promoting sustainable project designs.
    • Public Participation: EIA’s public consultations enhance transparency and inclusive decision-making.
    • Legal Framework: EIA is part of the legal framework for environmental protection, ensuring adherence to standards.
    • Long-Term Focus: EIA emphasizes long-term sustainability by assessing projects’ lasting impacts.

    Ignoring the Himalayan region

    • Inconsistency: Despite understanding the unique needs of the Indian Himalayan Region (IHR), its vulnerabilities aren’t addressed separately in the EIA.
    • Issue: Both the old and 2020 draft notifications don’t differentiate the IHR from the rest of India in terms of development needs.
    • Impact: This oversight results in the Himalayan States facing yearly devastation from extreme weather conditions.

    Flaws in the Graded Approach

    • The current approach differentiates risk based on location (e.g., reserved forest, national park). But the IHR, despite its ecological significance, is treated the same as other regions.

    Proposed Solutions

    • Differentiate environmental standards for projects in the IHR.
    • Address IHR-specific concerns at all EIA stages.
    • Include provisions about the IHR in general conditions for all projects.

    Existing Issues with the EIA

    • Lack of Oversight: There is no national regulator for transparent project appraisal and monitoring.
    • Reactive Nature: EIA currently reacts to proposals rather than preempting them.
    • Biased Assessments: Often, EIAs are in favor of projects because they’re funded by the project proponent.
    • Limited Scope: The current process doesn’t adequately consider the cumulative impacts of multiple projects in a region.

    Conclusion

    • The EIA process, especially concerning the IHR, requires a comprehensive review. Exploring tools like strategic environmental assessment can be more effective in addressing the cumulative impact of development in regions like the IHR. Policymakers should prioritize the environment and ecology in their developmental plans.

  • Why are Earthquakes so frequent in Afghanistan?

    Afghanistan

    Central Idea

    • On October 15, Afghanistan was struck by a formidable earthquake with a magnitude of 6.3, adding to the woes of a nation still reeling from a series of devastating quakes just days earlier.
    • This recent seismic activity reflects Afghanistan’s turbulent history of earthquakes, often with catastrophic consequences.

    Understanding Earthquakes

    • Tectonic Plate Movement: The Earth’s lithosphere consists of tectonic plates that move due to internal heat energy. Fault lines are formed along the discontinuities where these plates interact.
    • Earthquake Mechanism: Earthquakes occur when these lithospheric plates suddenly slip past one another, releasing energy that propagates as seismic waves. The point where the slip starts is known as the focus or hypocenter, with the epicenter being its surface projection.

    earthquake

    What exactly causes Earthquakes?

    • As we know, the earth’s outermost surface, crust, is fragmented into tectonic plates.
    • The edges of the plates are called plate boundaries, which are made up of faults.
    • The tectonic plates constantly move at a slow pace, sliding past one another and bumping into each other.
    • As the edges of the plates are quite rough, they get stuck with one another while the rest of the plate keeps moving.
    • Earthquake occurs when the plate has moved far enough and the edges unstick on one of the faults.
    • The location below the earth’s surface where the earthquake starts are called the hypocenter, and the location directly above it on the surface of the earth is called the epicentre.

    Afghanistan’s Seismic Vulnerability

    • Tectonic Plate Intersection: Afghanistan’s location atop the convergence of the Indian and Eurasian tectonic plates results in frequent seismic activity.
    • Eurasian Plate: Afghanistan sits on the Eurasian Plate, with the Arabian Plate subducting northward in the west and the Indian Plate doing the same in the east.
    • Complex Geology: The Hindu Kush mountain range and the Pamir Knot add complexity to this geological region, leading to folding, faulting, and earthquakes.
    • Continual Compression: The northward movement of the Indian Plate toward Eurasia causes compression, uplifting the Himalayas, and transmitting tectonic stress. This leads to crustal deformation, faulting, and seismic activity.
    • Active Fault Systems: Afghanistan is intersected by active fault systems like the Chaman Fault and the Main Pamir Thrust, which are prolific sources of earthquakes.

    History of Earthquake Afghanistan

    • October 11 Quakes: In October 2023, a series of powerful earthquakes, including a magnitude 6.3 tremor, wreaked havoc in Herat province, claiming the lives of at least a thousand people.
    • June 2022 Tragedy: A magnitude 6.1 earthquake in Khost and Paktika provinces in June 2022 left over 1,000 casualties.
    • 2015 Catastrophe: A major earthquake in northeastern Afghanistan in 2015 claimed over 200 lives in Afghanistan and northern Pakistan.
    • 2002 Devastation: A 6.1-magnitude earthquake in 2002 resulted in approximately 1,000 casualties in northern Afghanistan.
    • 1998 Disaster: In 1998, northeast Afghanistan experienced a catastrophic earthquake and subsequent tremors, causing the loss of at least 4,500 lives.

  • Rethinking the 2022 Wildlife Protection Act

    What’s the news?

    • The recent inclusion of a plethora of species in the new schedules of the Wildlife Protection (Amendment) Act, 2022 has raised numerous questions among ecologists.

    Central idea

    • The inclusion of a multitude of species in its schedules has raised concerns about the lack of an objective and replicable process. While the intention behind the amendment is to enhance conservation efforts, it is imperative to address the issues it raises in terms of conservation, its impact on people, and its implications for research.

    Overview of the New Act

    • Schedule 1: Houses around 600 species of vertebrates and numerous invertebrates, with the highest protection.
    • Schedule 2: Contains roughly 2,000 species, including 1,134 bird species.
    • Alignment with CITES: The act also incorporates the CITES appendices.

    Concerns for Conservation

    • Ambiguity in Resource Allocation: The act does not provide a clear direction on prioritizing species for resource allocation.
    • Uniform Protection Levels: Species ranging from tigers to jackals and from great Indian bustards to common barn owls are accorded the same protection level.
    • Unintended Consequences: Acts meant to conserve might sometimes yield counterproductive results. For instance, listing the invasive spotted deer (chital) in Schedule 1 has inadvertently protected it, despite the harm it inflicts on the Andaman Islands’ ecosystem.

    Impact on Humans

    • Human-Wildlife Conflict: The WLPA underlines the concept of co-existence, often neglecting the harm certain species can cause to humans, both physically and psychologically. By elevating wild pigs and nilgai to Schedule 1, the act potentially limits states’ abilities to cull problematic animals, disregarding farmers’ concerns.
    • Traditional Practices Overlooked: Despite hunting and use of certain animals being traditional practices, the WLPA imposes restrictions. There’s a lack of balance between conservation needs and societal traditions.
    • Research Constraints: The listing of a vast number of species could inhibit research. Securing permits for research becomes a convoluted process. Furthermore, the act’s implications on citizen science and data sharing remain unclear.

    Broader Issues

    • Some ecologists have been observed to neglect the broader issues.
    • Their operations sometimes resemble ‘parachute science’, taking more than they give back to local communities.
    • The implications of this act not only hinder research, but also severely impact these communities.

    Way Forward

    • Transparent Inclusion Process: Develop a replicable and objective process for the inclusion of species in the schedules. This could be based on ecological significance, population sizes, and expert consultations.
    • Reassess and Reclassify Species: A re-evaluation of species, especially those like the spotted deer in the Andaman Islands, is necessary. Reallocating species between schedules can ensure more appropriate protection levels.
    • Resource Allocation Blueprint: Given the vast number of species included, a clear guideline for resource allocation is essential. It should be based on urgency, ecological significance, and conservation viability.
    • Human-Wildlife Conflict Mitigation: Design a more nuanced policy for managing conflicts. It should include better conflict response, compensation schemes, and awareness programs, especially in areas where Schedule 1 species are in direct conflict with human populations.
    • Reconsideration of Traditional Practices: Address the disconnect between the Act and traditional practices by incorporating provisions for regulated and sustainable use of species, especially where they are abundant and pose no threat to their populations.

    Conclusion

    • The imperative now is a balanced approach that ensures human safety, bases management actions on research, and permits observation without harming the ecosystem, respecting both human rights and wildlife conservation.

  • Places in news: Dhanauri Wetland

    Dhanauri Wetland

    Central Idea

    • The National Green Tribunal has given the UP government four weeks to inform it about the status of the Ramsar tag for Dhanauri wetlands.

    Dhanauri Wetland

    • The Dhanauri Wetlands is a bird-watching area located in Dhanauri village near Dankaur in Uttar Pradesh.
    • It is home to over 120 Sarus cranes (Sarus Cranes is the state bird of Uttar Pradesh).
    • It is a sanctuary for 23 species of endangered, critically endangered, and threatened birds, with special significance as a habitat for the majestic Sarus crane.

    Ecological Significance

    • Dhanauri is a natural wetland that hosts more than 217 bird species, including over 150 Sarus cranes, and serves as a vital birding and nesting site.
    • It has received recognition as an Important Bird Area by Bird Life International and has been documented by the BNHS (Bombay Natural History Society).
    • During peak migratory seasons (November to March), the wetland hosts over 50,000 waterfowls.

    Why in news?

    • Dhanauri plays a crucial role in supporting the vulnerable Sarus crane population.
    • The wetland fulfills two key Ramsar site criteria out of nine:
      1. It hosts over 1% of the biogeographic Sarus crane population.
      2. The area serves as a congregation site for 20,000+ waterfowls and various other species.

    Ramsar Wetlands

    • The Ramsar Convention, also known as the ‘Convention on Wetlands,’ is an intergovernmental environmental treaty founded by UNESCO in 1971.
    • It derives its name from the city of Ramsar in Iran, where it was initially signed.
    • Ramsar sites are wetlands of global significance recognized under this treaty.
    • The Montreux Record is a register of wetland sites on the brink of ecological changes and in need of close monitoring under the Ramsar Convention.

    Ramsar Site Designation Criteria:

    Ramsar site designation hinges on several factors:

    1. Representing rare or unique natural wetland types.
    2. Supporting endangered species or threatened ecological communities.
    3. Maintaining biodiversity in specific biogeographic regions.
    4. Offering refuge during adverse conditions.
    5. Regularly accommodating 20,000 or more waterbirds.
    6. Sustaining 1% of a population of a single water-bird species.
    7. Serving as a critical source of food, spawning grounds, nurseries, and migration paths for fish.
    8. Regularly supporting 1% of a population of non-avian wetland-dependent animal species.

  • Disruption in Earth’s Water Cycle

    water cycle

    Central Idea

    • The World Meteorological Organization (WMO) issued a report highlighting the significant impact of climate change and human activities on Earth’s water circulation systems.
    • This has direct consequences leading to droughts, extreme rainfall events, and disruptions in water cycles.

    What is the Water Cycle?

    • The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the Earth’s surface.
    • It involves various processes that allow water to circulate between the atmosphere, land, oceans, and other bodies of water:
    Evaporation Sun’s heat turns surface water into vapor.
    Condensation Vapor forms clouds as it cools in the atmosphere.
    Precipitation Clouds release moisture as rain, snow, or hail.
    Runoff & Infiltration Water flows over land or seeps into the ground.
    Transpiration Plants absorb and release water vapor.
    Sublimation Ice transforms directly into vapor in specific conditions.
    Transport Winds move moisture globally.
    Collection Water gathers in oceans, lakes, and underground sources.

     Why is it under stress?

    • Diverse Impact: Climate change and human activities have led to an erratic hydrological cycle, resulting in both droughts and extreme rainfall events, causing widespread disruptions affecting livelihoods and economies.
    • Melting Snow and Glaciers: Ongoing melting of snow, ice, and glaciers further exacerbates the risk of extreme weather events, such as floods, posing long-term threats to water security, particularly for millions already facing severe water scarcity.

    Global Impact

    • Global Deviations: Over 50% of global catchment areas experienced deviations from normal river discharge conditions in 2022, primarily due to climate anomalies, such as heatwaves, droughts, La Nina, and El Nino events.
    • Horn of Africa Drought: Severe drought in the Horn of Africa led to reduced river discharge, affecting food security for 21 million people, while other regions, like the Niger Basin, saw above-average discharge and major floods.
    • Water Reservoirs Affected: More than 60% of major water reservoirs experienced below-normal inflow, posing challenges to water availability in a changing climate.

    Impact on Asian Water Tower

    • The term “Asian Water Tower (AWT)” typically refers to the vast network of high mountain regions across Asia, particularly in countries like India, China, Nepal, Bhutan, and parts of Central Asia.
    • These high mountain regions are the source of many major rivers in Asia, such as the Ganges, Brahmaputra, Yangtze, Mekong, Indus, and Amu Darya.
    • The melting snow and glaciers in these mountains provide a continuous supply of freshwater to downstream areas.
    • This AWT witnessed substantial glacial melting in 2022.
    • Rising temperatures accelerate water cycle disruptions, leading to heavier precipitation, flooding, and intensified droughts, significantly impacting the water balance.

  • Sustainable water management in Agriculture

    What’s the news?

    • The theme for World Food Day (October 16) this year—’Water is Life, Water is Food’ —calls for urgent action in managing water wisely.

    Central idea

    • Water is the essence of life, a resource that nourishes not just humanity but every ecosystem on this planet. However, as this year’s World Food Day theme rightly points out, water is also food. In the light of increasing climate extremes, managing this precious resource wisely has never been more urgent.

    Impact of Climate Change on Crop Yields

    • Rainfed rice yields in India are projected to decrease by 20% in 2050 and 47% in 2080 if no adaptation measures are taken.
    • Irrigated rice yields are also expected to decline, with a projected decrease of 3.5% in 2050 and 5% in 2080 scenarios.
    • Wheat yields could face substantial reductions, with a projected decrease of 19.3% in 2050 and 40% in 2080.
    • Kharif maize yields are also at risk, with projected declines of 18% in 2050 and 23% in 2080.
    • Climate change, without adequate adaptation measures, not only reduces crop yields but also lowers the nutritional quality of the produce.

    Challenges associated with poor water management

    • Degraded Freshwater Supplies and Ecosystems: Decades of mismanagement, misuse, and pollution have resulted in the degradation of freshwater supplies and ecosystems. This has had a detrimental impact on the availability of clean water for agriculture and other essential needs.
    • Vulnerability of Small-Scale Producers: Small-scale farmers, who represent over 80% of farmers globally, are especially vulnerable to the effects of climate shocks, land degradation, and water scarcity.
    • Land Degradation: Approximately 40% of the world’s land area is degraded, which means that it is less productive for agriculture. This further reduces the available land for farming, exacerbating the challenges faced by small-scale producers.
    • Climate Impacts: Extreme weather events and variability in water availability are disrupting agricultural production. These changes are altering agro-ecological conditions and shifting growing seasons, making it challenging for farmers to predict and adapt to changing conditions.
    • Effects on Crop Productivity: Changes in rainfall patterns and rising temperatures have adverse effects on crop productivity. Reduced yields and food availability can result from these climate-related factors, which can contribute to food insecurity and hunger.

    Do not scroll past this

    FAO Crop Forecasting Framework:

    • The FAO is working on a pilot project in several Indian states, including Andhra Pradesh, Karnataka, Himachal Pradesh, and Maharashtra.
    • The project aims to develop a crop forecasting framework and model that incorporates climate data, soil characteristics, and market information.
    • This information can help rainfed farmers make informed decisions about their crops, potentially contributing to food security by improving agricultural planning and management.

     Climate change adaptation

    • FAO Initiatives:
      • Supports sustainable agrifood systems and climate-smart agriculture.
      • Initiated the farmer water school programme in Uttar Pradesh.
      • Supported the Andhra Pradesh Farmer Managed Groundwater Systems project which benefits 638 habitations with hydrological monitoring.
    • IFAD’s Focus:
      • Prioritizes climate change adaptation in its core strategies.
      • Invests in preserving soil health, water resources, and integrating modern technologies with indigenous systems.
      • Implements projects in Maharashtra, Odisha, Uttarakhand, Nagaland, and Mizoram emphasizing climate-resilient practices.
    • WFP Collaboration:
      • Partners with the Government of Odisha focusing on women farmers.
      • Employs solar technologies and promotes millet-value chains for climate resilience.

    Steps needed

    • Overall Strategy: Prioritize political commitment and concrete investment for global food and nutrition security. Promote innovative technologies to enhance farmer productivity.
    • Climate Change Adaptation: Formulate strategies to adapt to climate change. Foster resilience against environmental and economic shocks.
    • Agricultural Practices: Implement sustainable and economically feasible irrigation and water management techniques. Minimize the climate footprint in agricultural production. Address bio-hazards and environmental pollution.
    • Infrastructure and Supply Chain: Prioritize sanitation and potable water supply for rural areas. Advocate for efficient food and water recycling methods.
    • Regulation and Management: Strengthen sustainable and fair water regulations. Improve management, access, and ownership systems for resources.
    • UN’s Collaborative Projects: Collaborate with the Indian Government on projects such as Solar 4 Resilience, Secure Fishing, and the revival of millets for renewable energy and food security.

    Conclusion

    • Climate change is making water more scarce and unpredictable. Droughts, floods, and other extreme weather events are becoming more common. World Food Day is a reminder that we all have a role to play in achieving food and nutrition security for all. By working together, we can create a world where everyone has enough to eat and drink.

  • Kanwar Lake: Bihar’s only Ramsar Site drying up

    kanwar lake

    Central Idea

    • Kawar Lake, Bihar’s only Ramsar Site, is experiencing a significant decrease in water levels and degradation.
    • However, it is drying up due to negligence.

    About Kanwar Lake/ Kabartal Wetland

    • The Kanwar Lake is Asia’s largest oxbow lake situated in the Begusarai district of Bihar.
    • It is a residual oxbow lake, formed due to the meandering of Gandak River, a tributary of Ganga.
    • It was declared a Ramsar site in 2020, making it the first wetland in Bihar to be included in the Ramsar convention.
    • This lake draws water from the confluence of the Gandak, the Bia and the Kareh river – is situated near Manjhaul, 22 km northwest of Begusarai, the district headquarters.

    Various threats to Kanwar Lake

    • Challenges include migratory bird hunting, agricultural activities around wetland areas, and government policies related to wetland management and conservation.
    • This decline has negatively impacted the livelihoods of around 20,000 Nishad community members in nearby villages who depend on fishing.

    Bihar’s Wetland Potential

    • Bihar possesses a substantial area of wetlands, covering around 4.4% of its total geographical area, according to data from ISRO.
    • Despite its wetland potential, Bihar has only one recognized Ramsar site out of a total of 75 in India.

    Potential Wetlands

    • Bihar has proposed several wetlands for Ramsar designation, including Kusheshwarsthan, Barela, Goga Bil, Nagiand Nakti dams, Udaipur Lake, Vikramshila Gangetic Dolphin Sanctuary, and Gokul Reservoir.
    • These wetlands are home to a range of wildlife, including migratory birds and endangered species like dolphins.

    Back2Basics:

    Ramsar Convention
    Purpose International treaty aimed at conserving and promoting the sustainable use of wetlands.
    Establishment Established on February 2, 1971, in Ramsar, Iran.
    Participating Countries 171 contracting parties (countries) as of September 2021.
    India and Ramsar Convention The first Ramsar Site in India, the Chilika Lake in Odisha, was designated in 1981.

  • Large Ozone Hole detected over Antarctica

    ozone

    Central Idea

    • Satellite measurements conducted over Antarctica have unveiled a gigantic hole in the ozone layer.
    • Termed an “ozone-depleted area,” this region spans 26 million square kilometers (10 million square miles), approximately three times the size of Brazil.

    Ozone Layer and Ozone Hole

    Location Stratosphere, approximately 10-30 km above Earth’s surface.
    Composition Composed of ozone (O3) molecules.

    Unit of measurement: Dobsob Unit (DU)
    Function Acts as a protective shield, absorbing and blocking a significant portion of harmful ultraviolet (UV) radiation from the sun.
    Importance Essential for protecting life on Earth by preventing excessive UV radiation, which can harm living organisms and the environment.
    Ozone-depleting Substances Threatened by ODS like chlorofluorocarbons (CFCs), halons, and other synthetic compounds commonly used in refrigeration, air conditioning, and aerosol propellants.
    Montreal Protocol An international treaty adopted in 1987 to phase out the production and consumption of ODS, resulting in significant recovery of the ozone layer.
    Current Status The ozone layer is in the process of recovery due to the success of the Montreal Protocol.
    Environmental Impact Protects ecosystems, prevents skin cancer, cataracts, and other health issues in humans.
    Additional Facts • The size of the ozone hole over Antarctica varies annually, opening in August and closing in November or December.

    • Special winds caused by the Earth’s rotation create a unique climate over Antarctica, preventing mixing with surrounding air.

    • When these winds subside, the hole closes.

    Potential Causes of the Giant Ozone Hole

    • Volcanic Eruption in Tonga: Scientists speculate that the extensive ozone hole this year may be linked to volcanic eruptions in Hunga Tonga, Tonga, between December 2022 and January 2023. These eruptions released water vapor and other elements into the stratosphere, impacting the ozone layer through chemical reactions.
    • Human-Induced Ozone Holes: In the 1970s, scientists discovered that human activities, primarily the use of chlorofluorocarbons (CFCs), led to significant ozone depletion. These chemicals released chlorine in the stratosphere, depleting the ozone layer.
    • Effective Mitigation: The Montreal Protocol, established in 1987, aimed to combat ozone depletion by phasing out ozone-depleting substances. This international agreement successfully reduced the size of ozone holes over the years.

    Ozone Depletion and Climate Change

    • Not a Primary Climate Change Cause: Ozone depletion is not a leading contributor to global climate change.
    • Impact of Rising Temperatures: However, rising global temperatures may influence ozone holes. Extreme fires, such as those in southeastern Australia in 2020 and 2021, injected smoke into the stratosphere, potentially contributing to ozone depletion.
    • Changing Seasons: Ozone holes can alter the progression of seasons, as they extend the duration of polar vortexes, thereby extending winter periods.

  • Hottest September ever and climate change

    What’s the news?

    • September 2023 stands out as it recorded a remarkable 1.75-degree Celsius increase compared to the pre-industrial baseline of 1850–1900, making it a month with an unprecedented temperature deviation.

    Central idea

    • In the relentless march of climate change, 2023 has emerged as a year of unprecedented heatwaves. Each passing month seems to shatter temperature records, leaving us with grim prospects for the remainder of the year. As September, the hottest on record, draws to a close, we must confront the sobering reality that 2023 may become the warmest year ever recorded.

    2023: On Track to Be the Warmest Year

    • 2023 is poised to claim the dubious distinction of being the warmest year on record. The average temperature for the first nine months of the year already surpasses the corresponding period of 2016, the previous record holder.
    • In 2016, the average temperature was 1.28 degrees Celsius higher than pre-industrial times, and 2023 may breach the 1.5-degree Celsius mark for the first time.

    Rising Temperatures Predicted

    • The remarkable string of record-breaking temperature events in 2023 was not entirely unexpected. Scientists had foreseen this year’s warmth, primarily due to the development of El Niño in the Pacific Ocean.
    • While specific events couldn’t be predicted, the overall trend was ominous. Forecasts indicate that the last three months of the year will continue to be warmer than usual.

    Record-Breaking Months

    • The record-breaking temperatures in September follow a pattern of extraordinary warmth throughout the year. July, in particular, stood out as the warmest month ever recorded, setting a new global monthly temperature high.
    • Multiple days in July broke daily temperature records. Preceding this, June claimed the title of the warmest June ever, and February, March, April, and May all ranked among the top five hottest for their respective months.

    Lack of immediate solutions

    • Despite the alarming rise in temperatures and the string of record-breaking events in 2023, there has been a noticeable lack of immediate policy responses from countries to combat climate change.
    • Addressing climate change in the short term is challenging, and there are limitations to what can be done to lower temperatures or prevent future warming events on an immediate timescale.
    • Only a global disruption on the scale of the COVID-19 pandemic could bring about significant deviations from the current trend of increasing temperatures.

    Way forward: Urgent action is needed

    • There is an urgent need for decisive action in response to the unprecedented heatwaves and their associated impacts.
    • The world is rapidly approaching critical climate thresholds, including the 1.5-degree Celsius target set by the Paris Agreement.
    • The lack of immediate solutions and policy responses to mitigate climate change is a pressing concern.
    • Nations need to acknowledge the stark reality of climate change’s relentless advance and take immediate, robust, and meaningful measures to address the crisis.
    • Decisive action is required now to prevent irreversible consequences associated with global warming.

    Conclusion

    • As nations prepare for the annual climate change meeting in Dubai, it is imperative that they acknowledge the stark reality of climate change’s relentless advance. The stock-take exercise must reveal the gaps in global climate action and serve as a wake-up call for more robust and immediate measures.

  • Climate Change Trends: Trends, Shifts, or Decadal Cycles

    Central Idea

    • Studies have highlighted various climate phenomena in India, including declining monsoon rainfall, intensifying extreme weather events, droughts, heatwaves, and cyclones.
    • However, a critical question that demands attention is whether these changes represent long-term trends, abrupt shifts, or decadal cycles.
    • These distinctions hold significant implications for resource planning and management.

    Understanding Climate Change Terminology

    • Trend: Refers to a continuous, prolonged change in climate variables, such as a steady temperature increase over time. The term “anthropogenic trend” implies changes occurring within human lifetimes.
    • Secular Trend: Indicates a variable’s continuous increase for a specific period within a more extended timeframe, like 30 years within a century.
    • Decadal Variability: Involves oscillations between positive and negative phases over tens of years, potentially resembling a shift.
    • Shift: Represents a rapid transition from one state to another, like a sudden change in rainfall patterns. An example is the shift in seasonal monsoon rainfall from above the long-period average (LPA) to below it.

    Case Study: Cyclones Trend in Arabian Sea

    • A recent study in the journal Climate and Atmospheric Science identified a notable change in cyclone formation potential over the Arabian Sea in the late 1990s.
    • Cyclone-genesis potential depends on factors like sea surface temperature, ocean heat content, wind changes from the surface to upper atmosphere, and wind rotation. These factors have favored increased cyclone formation potential since the 1990s.
    • However, the crucial question is why this rapid increase occurred during this period. The study suggests that it coincided with a shift in the ‘Warm Arctic, Cold Eurasian’ (WACE) pattern rather than being a trend.

    Warm Arctic, Cold Eurasian Pattern

    • The WACE pattern involves warm surface temperatures over the Arctic and cold surface temperatures over Eurasia. It influences upper-level circulation changes that extend into the Indian Ocean sector.
    • Global warming experienced a slowdown during this period, and scientists have proposed the occurrence of a ‘regime shift,’ similar to one observed in the mid-1970s.

    Challenge for India

    • Regardless of whether these climate changes are shifts or decadal cycles, it is essential to understand their potential long-term effects on the monsoon, cyclone frequency, heatwaves, and extreme rainfall.
    • Accurate predictions are vital for planning and allocating resources to adapt to climate risks, such as sea-level rise, heavy rainfall, drought, heatwaves, and cyclones.
    • Climate scientists must focus on understanding natural variability in the local context, especially since this variability is influenced by global warming.
    • For example, the study indicates that the monsoon decadal cycle, previously lasting around 20 years, may now extend further, raising questions about the underlying causes.

    Conclusion

    • Distinguishing between climate trends, shifts, and decadal cycles is essential for India’s adaptation strategies.
    • These distinctions affect how the country prepares for and responds to evolving climate patterns, and climate scientists must strive to unravel the complexities of natural variability to make informed predictions and policy recommendations.