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GS Paper: GS1-14.Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.,

  • World’s largest iceberg breaks off from Antarctica

    A huge ice block has broken off from western Antarctica into the Weddell Sea, becoming the largest iceberg in the world and earning the name A-76.

    Answer this PYQ in the comment box:

    Q.On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion:

    (a) is found in the atmosphere as moisture and clouds

    (b) is found in freshwater lakes and rivers

    (c) exists as groundwater

    (d) exists as soil moisture

    A-76 Iceberg

    • A-76 is the latest in a series of large ice blocks to dislodge in a region acutely vulnerable to climate change, although scientists said in this case it appeared to be part of a natural polar cycle.
    • The iceberg, measuring around 170 km long and 25 km wide, with an area of 4,320 sq km is now floating in the Weddell Sea.
    • Slightly larger than the Spanish island of Majorca, A-76 had been monitored by scientists since it began to separate from the Ronne Ice Shelf.
    • It joins the previous world’s largest title holder A-23A — approximately 3,880 sq. km. in size — which has remained in the same area since 1986.
    • A-76 was originally spotted by the British Antarctic Survey and the calving — the term used when an iceberg breaks off — was confirmed using images from the Copernicus satellite.

    Note: An iceberg is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water.

  • Places in news: Leang Sakapao Caves

    Researchers have reported that Pleistocene-era rock paintings dating back to 45,000-20,000 years ago in cave sites in southern Sulawesi, on the Indonesian island of Sulawesi, are weathering at an alarming rate.

    Have you ever found the mention of ‘Altamira Caves’ in your NCERTs?

    Leang Sakapao Caves

    • This cave art of Sulawesi is much older than the prehistoric cave art of Europe.
    • The artwork in the area includes what is believed to be the world’s oldest hand stencil (almost 40,000 years ago), created by pressing the hand on a cave wall and spraying wet red-mulberry pigments over it.
    • A nearby cave features the world’s oldest depiction of an animal, a warty pig painted on the wall 45,500 years ago.

    Impact of climate change

    • The artwork made with pigments was decaying due to a process known as haloclasty, which is triggered by the growth of salt crystals due to repeated changes in temperature and humidity.
    • This is caused by alternating wet and dry weather in the region.
    • Indonesia has also experienced several natural disasters in recent years, which have quickened the process of deterioration.

    Note:

    Mark all islands of the Indonesian Archipelago in your Atlas.

  • Places in news: Thwaites Glacier

    The melting of Antarctica’s Thwaites Glacier – also called the “Doomsday Glacier”– has long been a cause of concern because of its high potential of speeding up the global sea-level rise happening due to climate change.

    Thwaites Glacier

    • Called the Thwaites Glacier, it is 120 km wide at its broadest, fast-moving, and melting fast over the years.
    • Because of its size (1.9 lakh square km), it contains enough water to raise the world sea level by more than half a meter.
    • Studies have found the amount of ice flowing out of it has nearly doubled over the past 30 years.
    • Thwaites’s melting already contributes 4% to global sea-level rise each year. It is estimated that it would collapse into the sea in 200-900 years.
    • Thwaites is important for Antarctica as it slows the ice behind it from freely flowing into the ocean. Because of the risk it faces — and poses — Thwaites is often called the Doomsday Glacier.

    What have previous studies said?

    • A 2019 study by New York University had discovered a fast-growing cavity in the glacier. Then last year, researchers detected warm water at a vital point below the glacier.
    • The study reported water at just two degrees above freezing point at Thwaites’s “grounding zone” or “grounding line”.
    • The grounding line is the place below a glacier at which the ice transitions between resting fully on bedrock and floating on the ocean as an ice shelf.
    • The location of the line is a pointer to the rate of retreat of a glacier.
    • When glaciers melt and lose weight, they float off the land where they used to be situated. When this happens, the grounding line retreats.
    • That exposes more of a glacier’s underside to seawater, increasing the melting rate resulting in the glacier speeding up, stretching out, and thinning, causing the grounding line to retreat ever further.

    What has the new study revealed?

    • The recent Gothenburg study used an uncrewed submarine to go under the Thwaites glacier front to make observations.
    • The submersible called “Ran” measured among other things the strength, temperature, salinity and oxygen content of the ocean currents that go under the glacier.
    • There is a deep connection to the east through which deepwater flows from Pine Island Bay, a connection that was previously thought to be blocked by an underwater ridge.

    Why this is a cause of worry?

    • The warm water is approaching the pinning points of the glacier from all sides, impacting these locations where the ice is connected to the seabed and where the ice sheet finds stability.
    • This has the potential to make things worse for Thwaites, whose ice shelf is already retreating.

  • What is net-zero, and what are India’s objections?

    In its bid to reclaim the global climate leadership (stalled since Trump) the US is widely expected to commit itself to a net-zero emission target for 2050 at the virtual Climate Leaders’ Summit convened by Prez Joe Biden.

    Net-Zero Goal

    • Net-zero, which is also referred to as carbon-neutrality, does not mean that a country would bring down its emissions to zero.
    • Rather, net-zero is a state in which a country’s emissions are compensated by absorption and removal of greenhouse gases from the atmosphere.
    • Absorption of the emissions can be increased by creating more carbon sinks such as forests, while the removal of gases from the atmosphere requires futuristic technologies such as carbon capture and storage.
    • This way, it is even possible for a country to have negative emissions, if the absorption and removal exceed the actual emissions.
    • A good example is Bhutan which is often described as carbon-negative because it absorbs more than it emits.

    Try this PYQ from CSP 2016:

    Q.With reference to the Agreement at the UNFCCC Meeting in Paris in 2015, which of the following statements is/are correct?

    1. The Agreement was signed by all the member countries of the UN and it will go into effect in 2017.
    2. The Agreement aims to limit the greenhouse gas emissions so that the rise in average global temperature by the end of this century does not exceed 20C or even 1.50C above pre-industrial levels.
    3. Developed countries acknowledged their historical responsibility in global warming and committed to donate S 1000 billion a year from 2020 to help developing countries to cope with climate change.

    Select the correct answer using the code given below.

    (a)    1 and 3 only

    (b)    2 only

    (c)    2 and 3 only

    (d)    1, 2 and 3

    The global target

    • The goal of carbon neutrality is only the latest formulation of a discussion going on for decades, on having a long-term goal.
    • A very active campaign has been going on for the last two years to get every country to sign on to a net-zero goal for 2050.
    • It is being argued that global carbon neutrality by 2050 is the only way to achieve the Paris Agreement target of keeping the planet’s temperature from rising beyond 2°C compared to pre-industrial times.
    • Current policies and actions being taken to reduce emissions would not even be able to prevent a 3–4°C rise by the turn of the century.
    • Long-term targets ensure predictability, and continuity, in the policies and actions of the countries. But there has never been a consensus on what this goal should be.

    Going beyond emission reduction

    • Earlier, the discussions used to be on emission-reduction targets, for 2050 or 2070, for rich and developed countries.
    • These unregulated emissions over several decades are mainly responsible for global warming and consequent climate change.
    • The net-zero formulation does not assign any emission reduction targets to any country.
    • Theoretically, a country can become carbon-neutral at its current level of emissions, or even by increasing its emissions, if it is able to absorb or remove more.

    Global actions for net-zero

    • Several other countries, including the UK and France, have already enacted laws promising to achieve a net-zero emission scenario by the middle of the century.
    • The EU is working a similar Europe-wide law, while many other countries including Canada, South Korea, Japan and Germany have expressed their intention to commit themselves to a net-zero future.
    • Even China has promised to go net-zero by 2060.
    • India, the world’s third-biggest emitter of greenhouse gases, after the US and China, is the only major player holding out.

    India’s position is unique

    • India is the only one opposing this target because it is likely to be the most impacted by it.
    • Over the next two to three decades, India’s emissions are likely to grow at the fastest pace in the world, as it presses for higher growth to pull hundreds of millions of people out of poverty.
    • No amount of afforestation or reforestation would be able to compensate for the increased emissions.
    • Most of the carbon removal technologies right now are either unreliable or very expensive.

    Why does India object to net-zero emissions?

    • The net-zero goals do not figure in the 2015 Paris Agreement, the new global architecture to fight climate change.
    • The Paris Agreement only requires every signatory to take the best climate action it can.
    • Countries need to set five- or ten-year climate targets for themselves, and demonstrably show they have achieved them.
    • Implementation of the Paris Agreement has begun only this year.
    • Most of the countries have submitted targets for the 2025 or 2030 period.
    • India has been arguing that instead of opening up a parallel discussion on net-zero targets outside of the Paris Agreement framework, countries must focus on delivering on what they have already promised.

    India is already doing more

    • India is hoping to lead by example. It is well on its way to achieving its three targets under the Paris Agreement and looks likely to overachieve them.
    • Several studies have shown that India is the only G-20 country whose climate actions are compliant with the Paris Agreement goal of keeping global temperatures from rising beyond 2°C.
    • Even the actions of the EU, which is seen as the most progressive on climate change, and the US are assessed as “insufficient”.
    • In other words, India is already doing more, relatively speaking, on climate than many other countries.

    Fuss over developed countries contribution

    • New Delhi also repeatedly points to the fact that the developed nations have never delivered on their past promises and commitments.
    • No major country achieved the emission-cut targets assigned to them under the Kyoto Protocol, the climate regime preceding the Paris Agreement.
    • Some openly walked out of the Kyoto Protocol, without any consequences.
    • None of the countries has delivered on the promises they made for 2020.
    • Even worse is their track record on their commitment to providing money, and technology, to developing and poor countries to help them deal with the impacts of climate change.

    India’s way forward

    • India has been arguing that the 2050 carbon-neutrality promise might meet a similar fate, although some countries are now finding themselves in law.
    • It has been insisting that the developed countries should, instead, take more ambitious climate actions now, to compensate for the unfulfilled earlier promises.
    • At the same time, it has been saying that it does not rule out the possibility of achieving carbon neutrality by 2050 or 2060.
    • Just that, it does not want to make an international commitment so much in advance.

    Back2Basics: Paris Agreement

    • The Paris Agreement is a legally binding international treaty on climate change. It was adopted by 196 Parties at COP 21 in Paris, on 12 December 2015 and entered into force on 4 November 2016.
    • Its goal is to limit global warming to well below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.
    • To achieve this long-term temperature goal, countries aim to reach global peaking of greenhouse gas emissions as soon as possible to achieve a climate-neutral world by mid-century.
    • It is a landmark process because, for the first time, a binding agreement brings all nations into a common cause to undertake ambitious efforts to combat climate change and adapt to its effects.

    The action plan

    • Implementation of the Paris Agreement requires economic and social transformation, based on the best available science.
    • The Agreement works on a 5- year cycle of increasingly ambitious climate action carried out by countries.
    • By 2020, countries submit their plans for climate action known as nationally determined contributions (NDCs).

    [Burning Issue] Five Years of Paris Agreement

  • What is Stockholm+50?

    Stockholm+50 is a high-level meeting that the Government of Sweden plans to hold in conjunction with the 50th anniversary of the first UN conference on the human environment – the 1972 Stockholm Conference.

    The 1972 Stockholm Conference

    • The UN Conference on the Human Environment, also known as the Stockholm Conference, was the first UN conference on the environment and was held between 5 and 16 June 1972 in Stockholm.
    • The meeting’s outcome document – the Stockholm Declaration – included several principles that are still important for environmental management.
    • Another result of the meeting was the establishment of the United Nations Environment Programme (UNEP) and the World Environment Day, held annually on 5 June.

    Try this PYQ:

    Q.The United Nations Framework Convention on Climate Change (UNFCCC) is an international treaty drawn at:

    (a) United Nations Conference on the Human Environment, Stockholm, 1972

    (b) UN Conference on Environment and Development, Rio de Janeiro, 1992

    (c) World Summit on Sustainable Development, Johannesburg, 2002

    (d) UN Climate Change Conference, Copenhagen, 2009

    Background

    • It’s been a generation since global leaders met in Stockholm in 1972 to discuss environmental challenges.
    • Then the concerns were for the local environment; there was no talk of climate change or even the depletion of the ozone layer.
    • All that came later. In 1972, the discussion was on the toxification of the environment as water and air were foul.

    Progress for 50 years

    • The toxification of the environment is still a pressing concern; countries have indeed cleaned up locally but added to the emissions in the global atmosphere.
    • Now, we are out of time as climate change impacts are spiralling out of control.

    Perils of Ecological Globalization

    • The fact is we stitched up the global ecological framework in terms of the many agreements only.
    • During this time, we also signed another agreement on free-trade — the economic globalisation agreement.
    • But we never really understood how these two frameworks — ecological and economic globalisation — would counteract each other.
    • As a result, we have worked to build an economic model based on discounting the price of labour and of the environment.

    Expectations from Stockholm+50

    • The aim of Stockholm+50 is to contribute to concrete action.
    • It aims at leveraging sustainable consumption and production patterns and nature-based solutions in order to achieve climate-neutral, resilient, circular and inclusive economies.
    • The narrative and result will be further developed together with interested governments and other partners.

  • Places in news: Lake Chad

    One of Africa’s largest freshwater bodies, Lake Chad, has shrunk by 90 per cent.

    Try this PYQ from CSP 2018:

    Q.Which of the following has/have shrunk immensely/dried up in the recent past due to human activities?

    1. Aral Sea
    2. Black Sea
    3. Lake Baikal

    Select the correct answer using the code given below:

    (a) 1 only

    (b) 2 and 3

    (c) 2 only

    (d) 1 and 3

    Lake Chad

    • Lake Chad in the Sahel spans the countries of Nigeria, Niger, Chad and Cameroon and is home to 17.4 million people.
    • It is blessed with rich aquatic and terrestrial biodiversity.
    • The Chari River, fed by its tributary the Logone, provides over 90% of the lake’s water, with a small amount coming from the Yobe River in Nigeria/Niger.
    • Despite high levels of evaporation, the lake is freshwater.
    • The Lake Chad basin comprises biosphere reserves, World Heritage and Ramsar sites as well as wetlands of international conservation importance.

    Why it is significant?

    • For years, the lake has been supporting drinking water, irrigation, fishing, livestock and economic activity for over 30 million people in the region.
    • It is vital for indigenous, pastoral and farming communities in one of the world’s poorest countries.
    • However, climate change has fuelled a massive environmental and humanitarian crisis.
    • The United Nations has termed the Lake Chad crisis as “one of the worst in the world”.

    A looming peril

    • The lake has shrunk 90 per cent over the last 60 years since the chronic droughts surged at the beginning of the 1970s.
    • The surface area of the lake was 26,000 square kilometres in 1963; it has now reduced to less than 1,500 square kilometres.
    • Its population is exploding and the region has been ripped apart from conflict at an unprecedented scale.

    Behind all crises

    • The ever-changing climate has dramatically worsened the situation, amplifying food and nutritional insecurity in the region.
    • Temperature is rising one-and-a-half times faster than the global average. The seasonal and inter-rainfall patterns have been drastically changing each year.
    • This has triggered food insecurity, ultimately pushing communities into the arms of terrorist groups.
    • Boko Haram is one of the top insurgent groups with a strong foothold in the region.

  • Carbon Watch: India’s first app to assess one’s carbon footprint

    Chandigarh became the first state or UT in India to launch Carbon Watch, a mobile application to assess the carbon footprint of an individual.

    Carbon Footprint

    • A carbon footprint is the total greenhouse gas (GHG) emissions caused by an individual, event, organization, service, or product, expressed as carbon dioxide equivalent.
    • It corresponds to the whole amount of greenhouse gases (GHG) produced to, directly and indirectly; support a person’s lifestyle and activities.
    • Carbon footprints are usually measured in equivalent tons of CO2, during the period of a year, and they can be associated with an individual, an organization, a product or an event, among others.
    • The GHGs whose sum results in a carbon footprint can come from the production and consumption of fossil fuels, food, manufactured goods, materials, roads or transportation.

    Note: An ecological footprint, as explained earlier compares the total resources people consume with the land and water area that is needed to replace those resources. A carbon footprint also deals with resource usage but focuses strictly on the greenhouse gases released due to burning of fossil fuels.

    How does the app Carbon Watch work?

    • As a person downloads the application, they will need to fill details in four parts — Water, Energy, Waste Generation and Transport (Vehicular movement).
    • In the category of Water, the person will be required to inform about the consumption of water.
    • In the Energy category, the details regarding the electricity units consumed every month at the house, monthly bill etc and usage of solar energy will have to be furnished.
    • In the Waste category, the individual will need to inform about the waste generated on their part and their family.
    • In the transport section, the individual will have to inform about the mode of transport used by four-wheeler, two-wheeler or bicycle.

    Try this PYQ:

    As a result of their annual survey, the National Geographic Society and an international polling firm GlobeScan gave India top rank in Greendex 2009 score. What is this score?

    (a) It is a measure of efforts made by different countries in adopting technologies for reducing the carbon footprint

    (b) It is a measure of environmentally sustainable consumer behavior in different countries

    (c) It is an assessment of programs/schemes undertaken by different countries for improving the conservation of natural resources

    (d) It is an index showing the volume of carbon credits sold by different countries

  • Glacial Lake Outburst Flood (GLOF) in Uttarakhand

    A massive glacier burst at Chamoli in Uttarakhand yet again bringing back our focus to the dangers of climate change.

    A wake-up call!

    Uttarakhand is often at the heart of various Himalayan disasters such as flash floods, cloud bursts, avalanches and earthquakes.

    The Chamoli incident signifies the dawn of ugly faces of climate disaster for which the mankind is clueless. At last, someone has to be blamed, isn’t it?

    What is the news?

    • Experts are uncertain about what caused the massive glacier burst at Chamoli in Uttarakhand.
    • It is unclear whether there was an avalanche in the area recently or whether the lake breach was the result of construction, anthropological activities, climate change etc.

    What is GLOF?

    • A GLOF is a type of outburst flood that occurs when the dam containing a glacial lake fails.
    • An event similar to a GLOF, where a body of water contained by a glacier melts or overflows the glacier, is called a jökulhlaup.
    • The dam can consist of glacier ice or a terminal moraine.
    • Failure can happen due to various factors such as:
    1. Erosion, a buildup of water pressure
    2. Avalanche of rock or heavy snow
    3. Earthquake or volcanic eruptions under the ice or
    4. Displacement of water in a glacial lake when a large portion of an adjacent glacier collapses into it

    Possible causes for Chamoli

    Avalanche

    • An avalanche is falling masses of snow and ice which gathers pace as it comes down the slope.
    • But an avalanche is unlikely to result in the rise of water of that magnitude what Chamoli witnessed.

    Cloudburst

    • What happened in Uttarakhand in 2013 was a multi-day cloudburst.
    • It is a sudden, very heavy rainfall accompanies by a thunderstorm. But it generally happens in monsoon.
    • In fact, the season in which such a disaster was witnessed has surprised experts as there is no immediate trigger that can be pointed to as the reason why water level rose to that level washing away two hydro projects.

    Why always Uttarakhand?

    • Human activities profoundly affect the earth’s climate and mountains are a sensitive indicator of that effect.
    • The mountain ecosystem is easily disrupted by variations in climate owing to their altitude, slope and orientation to the sun.
    • As the earth heats up, mountains glaciers melt at unprecedented rates.
    • Several scientists believe that the change occurring in the mountain ecosystems may provide an early glimpse of what could come to pass in a lowland environment.

    Conclusion

    • The current policy of the government of pursuing hydro-power projects indiscriminately cannot be ignored.
    • The entire State of Uttarakhand is categorised as falling in Zone-IV and V of the earthquake risk map of India.
    • The potential of the cumulative effect of multiple such projects has turned out to be more environmentally damaging than sustainable.

  • Global Climate Risk Index 2021

    India was ranked the seventh worst-hit country in 2019 in the Global Climate Risk Index 2021.

    The report holds much significance for prelims as well as mains. Just for the sake of information, we must be aware of India’s performance.

    Global Climate Risk Index

    • The GCRI is released annually by the environmental think tank and sustainable development lobbyist Germanwatch.
    • It analyses to what extent countries have been affected by the impacts of weather-related loss events (storms, floods, heat waves etc.).
    • It pushes for the need to support developing countries in coping with the effects of climate change.

    Highlights of the 2020 year

    Global prospects

    • Mozambique, Zimbabwe and The Bahamas were the worst-affected countries in 2019.
    • While hurricane Dorian ravaged The Bahamas; Mozambique, Zimbabwe and Malawi were affected by the single extreme weather event of cyclone Idai.
    • Japan and Afghanistan were the other countries that fared worse than India on the Index, while South Sudan, Niger and Bolivia fared better in comparison but still made it to the top 10 worst-affected countries.

    The burden of development

    • Eight of the 10 countries most affected between 2000 and 2019 were developing countries with low or lower middle income per capita.
    • Vulnerable people in developing countries suffered most from extreme weather events like storms, floods and heatwaves, whereas the impact of climate change was visible around the globe.
    • Poorer countries are hit hardest because they are more vulnerable to the damaging effects of a hazard and have the lower coping capacity.

    Data about India

    • According to the Index floods caused by heavy rain in 2019 took 1,800 lives across 14 states in India and displaced 1.8 million people.
    • Overall, the intense monsoon season affected 11.8 million people, with the economic damage estimated to be $10 billion (Rs.72,900 crore at $1=INR 72.9).
    • A total of eight tropical cyclones meant that 2019 was one of the most active Northern Indian Ocean cyclone seasons on record. Six of them intensified to become “very severe”.
    • The worst was Cyclone Fani in May 2019 which affected a total of 28 million people, killing nearly 90 people in India and Bangladesh, and causing economic losses of $8.1 billion (Rs.59,066 crore).

  • India’s Draft Arctic Policy

    India has unveiled a new draft ‘Arctic’ policy that and is committed to expanding scientific research, “sustainable tourism” and mineral oil and gas exploration in the Arctic region.

    Note: Five Arctic littoral states — Canada, Denmark (Greenland), Norway, Russia and the USA (Alaska) — and three other Arctic nations — Finland, Sweden and Iceland — form the Arctic Council (estd. 1996).

    Try mapping them.

    Caution: India became an Observer in the Arctic Council for the first time in 2013. And, India isn’t a full-time observer.

    India at the Arctic

    • India launched its first scientific expedition to the Arctic in 2007 and set up a research station ‘Himadri’ in the international Arctic research base at Ny-Ålesund in Spitsbergen, Svalbard, Norway.
    • It has two other observatories in Kongsforden and Gruvebadet. Himadri is manned for about 180 days a year.
    • Since its establishment, over 300 Indian researchers have worked in the station. India has sent 13 expeditions to the Arctic since 2007 and runs 23 active projects.

    Draft ‘Arctic’ policy

    • The draft policy discusses the importance of understanding the impact of climate change in the Arctic region and its connection with India’s monsoon, which is crucial for its economy.
    • India also proposes to focus on vast resources of the Arctic region including hydrocarbons, minerals and renewable power to ensure its energy security.
    • The policy is cautious in framing its involvement in the Arctic as “common heritage of mankind” but its priorities are similar to that of other non-Arctic states.
    • This policy roadmap draft rides on five pillars:
    1. Science and research activities,
    2. Economic and human development cooperation,
    3. Transportation and connectivity,
    4. Governance and international cooperation, and
    5. National capacity building.

    Nodal bodies

    • The Goa-based National Centre for Polar and Ocean Research to lead scientific research and act as a nodal body.
    • It would thus coordinate among various scientific bodies to promote domestic scientific research capacities by expanding earth sciences, biological sciences, climate change and space-related programmes, dove-tailed with Arctic imperatives.

    Why study arctic?

    • The Arctic is home to almost four million inhabitants, of which approximately one-tenth are considered as indigenous people.
    • Climate change has meant that seasons in the Arctic influence tropical weather.
    • The Arctic influences atmospheric, oceanographic and biogeochemical cycles of the earth’s ecosystem.
    • The loss of sea ice, ice caps, and warming of the ocean and atmosphere would lower salinity in the global oceans.
    • This could increase the temperature differential between land and oceans in the tropical regions, dry subtropical areas and increase precipitation at higher latitudes.
    • Arctic research will help India’s scientific community to study melting rates of the third pole — the Himalayan glaciers.