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Subject: Climate Change

1. Global Warming and Issues
2. All about Pollution

  • Net-zero emission targets do little to retard carbon grab

    Context

    Earlier this week the Intergovernmental Panel on Climate Change (IPCC) reported on climate science, warning against the folly of a business-as-usual development model.

    What does science say about future pathways

    • Globally, average surface temperatures have already risen by 1.09°C between 1850-1900 and 2010-2019.
    • What happens next depends on our development and technological choices.
    • High fossil fuel use path: As per the the IPCC document, if we followed high fossil fuel development (doubling emissions by 2050), temperatures would rise by 4.4°C (range of 3.3-5.7°C) by 2100.
    • Sustainable pathways: If a more sustainable pathway were pursued average global temperature rise would be 1.4°C (range of 1.0-1.8°C).
    • Regardless, it is likely that the average rise in temperatures will breach the 1.5°C barrier within the next two decades.
    • If emissions are not mitigated rapidly, we are staring at rising climate risks and catastrophic impacts.
    • Human influence is very likely the main reason behind glacial retreat since the 1990s.
    • Since observations began, glaciers have lost the maximum mass during 2010-19.
    • Sea level rise: Even with warming restricted to 1.5°C, we are still on course for more than 2 metres of sea-level rise beyond this century.

    India’s vulnerability to climate change

    • If warming exceeds 4°C, India could see about 40% increase in precipitation annually, leading to extreme rainfall events.
    • Three-quarters of India’s districts are now hotspots of extreme weather events.
    • Since 1990, more than 300 such events have resulted in damages exceeding INR 5.6 lakh crore.

    Changes needed to stabilise temperature rise

    • The IPCC says that in order to stabilise rise in temperatures, two things have to happen:
    • 1) Anthropogenic emissions must become net-zero.
    • 2) In the interim cumulative emissions cannot exceed a global carbon budget.
    • Carbon Budget: To stay within the 1.5°C limit, starting in 2020 the remaining global carbon budget is 300-500 gigatonnes of carbon dioxide (GtCO2) (with a likelihood of 50%-83%).

    Unjust climate politics and net-zero emission targets

    • Of late, several large emitters have promised net-zero emission targets. 
    • CEEW analysts calculate that despite their self-laudatory targets, China would consume 87% of the global carbon space (if it reached net-zero in 2060) and the US would eat up 26% (if it reached net-zero in 2050).
    • Mere announcements of net-zero targets do little to retard the “carbon grab” of the largest emitters.
    •  Rich countries, as a whole, emitted ~25 gigatonnes of carbon dioxide equivalent (GtCO2eq) more than their estimated emission allowance during 2008-20, thanks to non-participation in pre-2020 climate agreements and misuse of accounting loopholes. 
    • Climate justice demands that developed countries now take steps to free up carbon space for others.

    Way forward for India

    • India must adopt a more climate-friendly development pathway for its own sake.
    • Its per capita incomes, energy consumption and carbon footprint are well below the global average but it must deliver high rates of economic growth within a shrinking carbon budget.
    • Shift discourse to economy: The discourse must shift from energy to the economy.
    • There are very few sunrise sectors that are not low-carbon.
    • India must tap new technology frontiers (green hydrogen), new business models (distributed and digitalised services, for distributed energy, EV charging, cold chains), new construction materials (low-carbon cement, recycled plastic), new opportunities in the circular economy of minerals, municipal waste and agricultural residue, and new practices for sustainable agriculture and food systems.
    • Policy and regulatory support: Many of above technologies and business models are proven but need policy and regulatory support.

    Conclusion

    The climate crisis is a strategic threat to our development prospects. It deserves sober, continuing analysis, deliberation and action. The headlines look bad; reality will get worse.

  • Atlantic Meridional Overturning Circulation (AMOC)

    According to the IPCC’s Report (AR6), the Atlantic Meridional Overturning Circulation (AMOC), is losing its stability.

    What is AMOC?

    • The AMOC is a large system of ocean currents.
    • It is the Atlantic branch of the ocean conveyor belt or Thermohaline circulation (THC), and distributes heat and nutrients throughout the world’s ocean basins.
    • AMOC carries warm surface waters from the tropics towards the Northern Hemisphere, where it cools and sinks.
    • It then returns to the tropics and then to the South Atlantic as a bottom current. From there it is distributed to all ocean basins via the Antarctic circumpolar current.
    • Gulf Stream, a part of the AMOC, is a warm current responsible for mild climate at the Eastern coast of North America as well as Europe.

    What happens if AMOC collapses?

    • Colder Europe: Without a proper AMOC and Gulf Stream, Europe will be very cold.
    • Rainfall decline: Modelling studies have shown that an AMOC shutdown would cool the northern hemisphere and decrease rainfall over Europe.
    • El-Nino trigger: It can also have an effect on the El Nino.
    • Cooling of Atlantic: AMOC collapse could bring about large, markedly different climate responses: a prominent cooling over the northern North Atlantic and neighboring areas.
    • Weaker thermohaline: Freshwater from melting Greenland ice sheets and the Arctic region can make circulation weaker as it is not as dense as salt water and doesn’t sink to the bottom.

    Has the AMOC weakened before?

    • AMOC and THC strength has always been fluctuating, mainly if you look at the late Pleistocene time period (last 1 million years).
    • The extreme glacial stages have seen weaker circulation and slowdown in AMOC, while the glacial terminations have shown a stronger AMOC and circulation.
    • AMOC has been relatively stable until the late 19th century.
    • With the end of the little ice age in about 1850, the ocean currents began to decline, with a second, more drastic decline following since the mid-20th century.

    Why is the AMOC slowing down?

    • Climate models have long predicted that global warming can cause a weakening of the major ocean systems of the world.
    • Last month researchers noted that a part of the Arctic’s ice called “Last Ice Area” has also melted.
    • The freshwater from the melting ice reduces the salinity and density of the water. Now, the water is unable to sink as it used to and weakens the AMOC flow.

    Influence of Indian Ocean

    • Another study suggested that the Indian Ocean may also be helping the slowing down of AMOC.
    • As the Indian Ocean warms faster and faster, it generates additional precipitation.
    • With so much precipitation in the Indian Ocean, there will be less precipitation in the Atlantic Ocean, leading to higher salinity in the waters of the tropical portion of the Atlantic.
    • This saltier water in the Atlantic, as it comes north via AMOC, will get cold much quicker than usual and sink faster.
    • This acts as a jump start for AMOC, intensifying the circulation.

    Now try this:

    Q.With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct? (CSP 2020)

    1. OMT is measured up to a depth of 26ÂșC isotherm which is 129 meters in the south-western Indian Ocean during January-March.
    2. OMT collected during January-March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.

    Select the correct answer using the code given below:

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

    [wpdiscuz-feedback id=”t9bjw2xexz” question=”Please leave a feedback on this” opened=”1″]Post your answers here:[/wpdiscuz-feedback]

    Back2Basics:  Ocean Currents

  • IPCC’s Climate Assessment Report

    The Geneva-based Intergovernmental Panel on Climate Change (IPCC) will release the first part of its Sixth Assessment Report, the periodic status check that has now become the most widely accepted scientific view of the state of the Earth’s climate.

    What is IPCC?

    • The IPCC, an intergovernmental body was established in 1988 by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP).
    • It was later endorsed by the UN General Assembly. Membership is open to all members of the WMO and UN.
    • The IPCC produces reports that contribute to the work of the UN Framework Convention on Climate Change (UNFCCC), the main international treaty on climate change.
    • The objective of the UNFCCC is to “stabilize greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic (human-induced) interference with the climate system.”
    • The IPCC’s Fifth Assessment Report was a critical scientific input into the UNFCCC’s Paris Agreement in 2015.

    What are IPCC reports?

    • IPCC reports cover the scientific, technical and socioeconomic information relevant to understanding the scientific basis of risk of human-induced climate change, its potential impacts and options for adaptation and mitigation.
    • The IPCC does not carry out original research, nor does it monitor climate or related phenomena itself.
    • Rather, it assesses published literature, including peer-reviewed and non-peer-reviewed sources.
    • However, the IPCC can be said to stimulate research in climate science.

    The Assessment Reports

    • The five previous assessment reports that have come out since the IPCC was established in 1988 have formed the basis of international climate change negotiations, and the actions of the governments.
    • Their value has been globally acknowledged, and the fourth assessment report, which came out in 2007, won the IPCC the Nobel Peace Prize.
    • Each of these voluminous reports, the last couple of them running into thousands of pages, have built upon the previous ones with updated knowledge and understanding of the climate system.
    • The reports have presented projections for temperature rise till 2100 under different scenarios and the kind of impacts that can be expected under each of these pathways.

    Key projections of the 6th Report

    Apart from incorporating the latest available scientific evidence, the Sixth Assessment Report is also attempting to provide more actionable information to help governments take policy decisions.

    • REGIONAL FOCUS: It is expected that this report would likely state what the scenarios for sea-level rise in the Bay of Bengal region is, not just what the average sea-level rise across the world is likely to be.
    • EXTREME EVENTS: There is expected to be bigger focus on extreme weather events, like the ones we have seen in the last few weeks.
    • CITIES: Densely populated mega-cities are supposed to be among the most vulnerable to impacts of climate change. The report is expected to present specific scenarios the climate change impacts on cities and large urban populations, and also implications for key infrastructure.
    • SYNERGIES: IPCC is expected to present a more integrated understanding of the situation, cross-link evidence and discuss trade-offs between different options or pathways, and also likely to cover social implications of climate change action by countries.

    Why it matters?

    • The IPCC assessment reports have been extremely influential in directing the dialogue and action on climate change.
    • The First Assessment Report led to the setting up of the UNFCCC, the umbrella agreement under which international negotiations on climate change take place every year.
    • The Second Assessment Report was the basis for the 1997 Kyoto Protocol that ran till last year, and the Fifth Assessment Report, which came out in 2014, guided the Paris Agreement.
    • The global climate architecture is now governed by the Paris Agreement, which replaced the Kyoto Protocol from this year.
    • There have been enough indications to suggest that global action was far below what was needed to keep the temperatures below 2°C, as mandated under the Paris Agreement.
    • In the immediate future, the IPCC report could serve as the most important warning towards the rapidly closing window of opportunity.

    Try this PYQ now:

    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

    [wpdiscuz-feedback id=”9729137kxt” question=”Please leave a feedback on this” opened=”1″]Post your answers here: [/wpdiscuz-feedback]

    Back2Basics: UNFCCC

    • The UNFCCC established an international environmental treaty to combat “dangerous human interference with the climate system”, in part by stabilizing greenhouse gas concentrations in the atmosphere.
    • It was signed by 154 states at the UN Conference on Environment and Development (UNCED), informally known as the Earth Summit, held in Rio de Janeiro from 3 to 14 June 1992.

  • Net-Zero Concept in Climate Change

    Independent charitable organization Oxfam has said that ‘net zero’ carbon targets that many countries have announced maybe a “dangerous distraction” from the priority of cutting carbon emissions.

    What does Net-Zero mean?

    • Net-zero, which is also referred to as carbon-neutrality, does not mean that a country would bring down its emissions to zero.
    • That would be gross-zero, which means reaching a state where there are no emissions at all, a scenario hard to comprehend.
    • Therefore, net-zero is a state in which a country’s emissions are compensated by absorption and removal of greenhouse gases from the atmosphere.

    Achieving net-zero targets

    • One way by which carbon can be absorbed is by creating carbon sinks.
    • Until recently, the Amazon rainforests in South America, which are the largest tropical forests in the world, were carbon sinks.
    • But eastern parts of these forests have started emitting CO2 instead of absorbing carbon emissions as a result of significant deforestation.

    What’s the difference between gross zero and net zero?

    • Given the impact that carbon emissions have on our planet, you might wonder why we aren’t aiming for zero, or gross zero, rather than net-zero.
    • Gross zero would mean stopping all emissions, which isn’t realistically attainable across all sectors of our lives and industry. Even with best efforts to reduce them, there will still be some emissions.
    • Net-zero looks at emissions overall, allowing for the removal of any unavoidable emissions, such as those from aviation or manufacturing.
    • Removing greenhouse gases could be via nature, as trees take carbon dioxide from the atmosphere, or through new technology or changing industrial processes.

    What is carbon negativity?

    • It is even possible for a country to have negative emissions if the absorption and removal exceed the actual emissions.
    • Bhutan has negative emissions because it absorbs more than it emits.

    Which countries have recently announced net-zero targets?

    • In 2019, the New Zealand government passed the Zero Carbon Act, which committed the country to zero carbon emissions by 2050 or sooner.
    • In the same year, the UK’s parliament passed legislation requiring the government to reduce the UK’s net emissions of greenhouse gases by 100 per cent relative to 1990 levels by the year 2050.
    • More recently, US announced that the country will cut its greenhouse gas emissions by at least 50 per cent below 2005 levels by 2030.
    • The European Union too, has a similar plan, called “Fit for 55”, the European Commission has asked all of its 27 member countries to cut emissions by 55 per cent below 1990 levels by 2030.
    • Last year, China also announced that it would become net-zero by the year 2060 and that it would not allow its emissions to peak beyond what they are in 2030.

    What does the Oxfam report say?

    • “Land-hungry ‘net zero’ schemes could force an 80 per cent rise in global food prices and more hunger while allowing rich nations and corporates to continue “dirty business-as-usual”.
    • The report says that if the challenge of change is tackled only by way of planting more trees, then about 1.6 billion hectares of new forests would be required to remove the world’s excess carbon by 2050.
    • Currently, countries’ plans to cut emissions will only lead to a one percent reduction by the year 2030.
    • Oxfam estimates that it could rise by 80 percent by the year 2050.

  • [pib] Centre launches Secured Logistics Document Exchange (SLDE) and GHG Calculator

    With an aim to further improve ease of doing business, Centre today launched the “Secured Logistics Document Exchange” along with a Calculator for Green House Gas Emissions.

    Secured Logistics Document Exchange (SLDE)

    • The SLDE platform is a solution to replace the present manual process of generation, exchange and compliance of logistics documents with a digitized, secure and seamless document exchange system.
    • It is set to improve logistics efficiency, reduce logistics cost, and promote multi-modality and sustainability in a big way.
    • This will enable generation, storage and interchange of logistics-related documents digitally using Aadhaar and blockchain-based security protocols for data security and authentication.
    • It will also provide a complete audit trail of document transfer, faster execution of transaction, lower cost of shipping and overall carbon footprint, easy verification of authenticity of documents, lowered risk of fraud, etc.
    • The proof of concept of the platform has been developed and executed with banks (ICICI, Axis Bank, State Bank of India and HDFC Bank) and stakeholders including freight forwarders, exporters, importers and vessel operators.

    Green House Gas (GHG) Emission Calculator

    • The GHG Calculator is an efficient, user-friendly tool and provides for calculating and comparing GHG emissions across different modes.
    • It allows for a commodity-wise comparison of GHG emissions and total cost of transportation, including their environmental cost, between movement by road and rail.
    • The tool is intended to facilitate appropriate modal choice for all concerned.

    Back2Basics: Green House Gases (GHGs)

    • A greenhouse gas (GHG) is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect.
    • The primary greenhouse gases in Earth’s atmosphere are water vapor (H 2O), carbon dioxide (CO 2), methane (CH 4), nitrous oxide (N 2O), and ozone (O3).
    • Without greenhouse gases, the average temperature of Earth’s surface would be about −18 °C (0 °F), rather than the present average of 15 °C (59 °F).
    • The atmospheres of Venus, Mars, and Titan also contain greenhouse gases.

  • Places in news: Great Barrier Reef

    Chinese official has said that political tensions between Beijing and Australia were not behind a UNESCO recommendation to place the Great Barrier Reef on its endangered list.

    Great Barrier Reef

    • The Great Barrier Reef is the world’s largest coral reef system composed of over 2,900 individual reefs and 900 islands.
    • It is stretched for over 2,300 kilometres over an area of approximately 344,400 square kilometres.
    • The reef is located in the Coral Sea, off the coast of Queensland, Australia.
    • It was world heritage listed in 1981 by UNESCO as the most extensive and spectacular coral reef ecosystem on the planet.

    Importance of Corals

    Coral reefs are some of the most diverse and valuable ecosystems on Earth.

    • They support more species per unit area than any other marine environment, including about 4,000 species of fish, 800 species of hard corals and hundreds of other species.
    • This biodiversity is considered key to finding new medicines for the 21st century.
    • Medical use: Many drugs are now being developed from coral reef animals and plants as possible cures for cancer, arthritis, human bacterial infections, viruses, and other diseases.
    • Fisheries: Healthy coral reefs support commercial and subsistence fisheries as well as jobs and businesses through tourism and recreation.
    • Local economies receive billions of dollars from visitors to reefs through diving tours, recreational fishing trips, hotels, restaurants, and other businesses based near reef ecosystems.
    • Coral reef structures also buffer shorelines against 97 per cent of the energy from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion.

    Answer this PYQ in the comment box:

    Q.Consider the following statements:

    1. Most of the world’s coral reefs are in tropical waters.
    2. More than one-third of the world’s coral reefs are located in the territories of Australia, Indonesia and the Philippines.
    3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.

    Which of the above statements is/are correct?

    (a) 1 and 2 only

    (b) 3 only

    (c) 1 and 3 only

    (d) 1 and 3 only

    Back2Basisc: Coral Reef

    • Coral reefs are built by and made up of thousands of tiny animals—coral “polyps”—that are related to anemones and jellyfish.
    • Polyps are shallow-water organisms that have a soft body covered by a calcareous skeleton. The polyps extract calcium salts from seawater to form these hard skeletons.
    • The polyps live in colonies fastened to the rocky seafloor.
    • The tubular skeletons grow upwards and outwards as a cemented calcareous rocky mass collectively called corals.
    • When the coral polyps die, they shed their skeleton on which new polyps grow.
    • The cycle is repeated for millions of years leading to the accumulation of layers of corals shallow rock created by these depositions is called a reef.

  • Why the Amazon forests are no longer acting as a carbon sink

    The Amazon forests in South America, which are the largest tropical forests in the world, have started emitting carbon dioxide (CO2) instead of absorbing carbon emissions.

    Note the countries bordered by the Amazon forests.

    Amazon forests

    • The Amazon rainforest is a moist broadleaf tropical rainforest in the Amazon biome that covers most of the Amazon basin of South America.
    • This basin encompasses 7,000,000 sq km of which 5,500,000 sq km are covered by the rainforest.
    • The majority of the forest is contained within Brazil, with 60% of the rainforest, followed by Peru with 13%, Colombia with 10%, and with minor amounts in Bolivia, Ecuador, French Guiana, Guyana, Suriname, and Venezuela.
    • It represents over half of the planet’s remaining rainforests and comprises the largest and most biodiverse tract of tropical rainforest in the world.

    Why in news?

    • A significant amount of deforestation in eastern and southeastern Brazil has turned the forest into a source of CO2 that has the ability to warm the planet.
    • Not only the Amazon rainforests, some forests in Southeast Asia have also turned into carbon sources in the last few years as a result of the formation of plantations and fires.

    What have the researchers found?

    • Over the years as fossil-fuel emissions across the world have increased, the Amazon forests have absorbed CO2 from the atmosphere, helping to moderate the global climate.
    • But researchers are not saying that because of significant levels of deforestation (over the course of 40 years) there has been a long-term decrease in rainfall and increase in temperatures during the dry season.
    • Because of these reasons the eastern Amazon forests are no longer carbon sinks, whereas the more intact and wetter forests in the central and western parts are neither carbon sinks nor are they emitters.
    • Another reason for the eastern region not being able to absorb as much CO2 as it did previously is the conversion of forests into agricultural land.

  • Arctic’s ‘Last Ice Area’

    A part of the Arctic’s ice called the “Last Ice Area”, located north of Greenland, has melted before expected. Scientists had believed this area was strong enough to withstand global warming.

    What is the Last Ice Area?

    • In an article published in 2015, National Geographic noted that climate projections forecast the total disappearance of summer ice in the Arctic by the year 2040.
    • However, the only place that would be able to withstand a warming climate would be this area of ice called the “Last Ice Area”.
    • But while this piece of ice above northern Canada and Greenland was expected to last the longest time, it is now showing signs of melting.
    • WWF claims that WWF-Canada was the first to call this area the‘ Last Ice Area’.

    Why is the area important?

    • The area is important because it was thought to be able to help ice-dependent species as ice in the surrounding areas melted away.
    • The area is used by polar bears to hunt for seals who use ice to build dens for their offspring.
    • Walruses too, use the surface of the ice for food search.

    When did the area start changing?

    • The first sign of change in LIA was observed in 2018.
    • Further, in August last year, sea ice showed its “vulnerability” to the long-term effects of climate change.
    • The ice in LIA has been thinning gradually over the years much like other parts of the Arctic Ocean.

    What are the reasons that explain the change?

    • About 80 per cent of thinning can be attributed to weather-related factors such as winds that break up and move the ice around.
    • The remaining 20 per cent can be attributed to the longer-term thinning of the ice due to global warming.

  • Lowering Emissions by Accelerating Forest Finance (LEAF) Coalition

    At the recently concluded Leaders’ Summit on Climate in April 2021, the Lowering Emissions by Accelerating Forest Finance (LEAF) Coalition was announced.

    LEAF Coalition

    • LEAF Coalition is a collective of the US, UK and Norway governments.
    • It is a public-private effort, thus supported by transnational corporations (TNCs) like Unilever plc, Amazon, Nestle, Airbnb etc.
    • It came up with a $1 billion fund plan that shall be offered to countries committed to arresting the decline of their tropical forests by 2030.
    • The LEAF coalition initiative is a step towards concretizing the aims and objectives of the Reducing Emissions from Deforestation and Forest Degradation (REDD+) mechanism.

    How does this coalition work?

    • The LEAF Coalition can help reverse the trend by providing unprecedented financial support to tropical forest governments implementing forest protection, contributing to green and resilient growth through sustainable investments.
    • It empowers tropical and subtropical forest countries to move more rapidly towards ending deforestation while supporting them in achieving their Nationally Determined Contributions (NDCs) under the Paris Agreement.
    • Reductions in emissions are made across entire countries or large states and provinces (“jurisdictions”) through programs that involve all key stakeholders, including Indigenous peoples and local communities.

    Why is it significant?

    • Financial impetus is crucial as it incentivizes developing countries to capture extensive deforestation and provide livelihood opportunities to forest-dependent populations.
    • The initiative comes at a crucial time when the tropics have lost close to 12.2 million hectares (mha) of tree cover year last year according to global estimates released by Global Forest Watch.
    • Most of these lost forests were located in the developing countries of Latin America, Africa and South Asia.
    • India’s estimated loss in 2020 stands at 20.8-kilo hectares due to forest fires

    What lies next?

    • Implementation of the LEAF Coalition will help pump in fresh rigour among developing countries like India, that are reluctant to recognize the contributions of their forest-dwelling populations in mitigating climate change.
    • With the deadline for proposal submission fast approaching, India needs to act swiftly on a revised strategy.
    • Although India has pledged to carry out its REDD+ commitments, it is impossible to do so without seeking knowledge from its forest-dwelling population.

    Answer this PYQ in the comment box:

    With reference to ‘Forest Carbon Partnership Facility’, which of the following statements is/ are correct?  (CSP 2013)

    1. It is a global partnership of governments, businesses, civil society and indigenous peoples.
    2. It provides financial aid to universities, individual scientists and institutions involved in scientific forestry research to develop eco-friendly and climate adaptation technologies for sustainable forest management.
    3. It assists the countries in their ‘REDD+ (Reducing Emissions from Deforestation and Forest Degradation+)’ efforts by providing them with financial and technical assistance.

    Select the correct answer using the code given below:

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

    Back2Basics: REDD+

    • REDD+ is a mechanism developed by Parties to the United Nations Framework Convention on Climate Change (UNFCCC).
    • It creates a financial value for the carbon stored in forests by offering incentives for developing countries to reduce emissions from forested lands and invest in low-carbon paths to sustainable development.
    • Developing countries would receive results-based payments for results-based actions.
    • REDD+ goes beyond simply deforestation and forest degradation and includes the role of conservation, sustainable management of forests and enhancement of forest carbon stocks.
    • It aims to create incentives for communities so that they stop forest degrading practices.

  • What is the ‘Heat Dome’ causing record temperatures in USA?

    A US city has recorded the highest temperatures as high as 46-degree Celsius part due to the historic heatwave that lasted as a result of a phenomenon referred to as a “heat dome”.

    What is a Heat Dome?

    • To understand what causes a heat dome, one should liken the Pacific Ocean to a large swimming pool in which the heater is turned on.
    • Once the heater is on, the portions of the pool close to the heating jets will warm up faster and therefore, the temperature in that area will be higher.
    • In the same way, the western Pacific ocean’s temperatures have increased in the past few decades and are relatively more than the temperature in the eastern Pacific.
    • This strong change in ocean temperature from the west to the east is what a team of scientists believe is the reason for the heat dome.
    • This occurs when the atmosphere traps heat at the surface, which encourages the formation of a heatwave.
    • To compare, the reason that the planet Venus is the hottest in the Solar System is that its thick, dense cloud cover traps the heat at the surface, leading to temperatures as high as 471 degrees Celsius.

    Is this heat wave a result of climate change?

    • It cannot be said for sure if the heatwave is a direct result of global warming.
    • Scientists are usually wary of linking climate change to any contemporary event mainly because of the difficulty in completely ruling out the possibility of the event having been caused by some other reason.
    • Similarly, scientists who have been studying the climate tend to agree that the heat waves occurring today are more likely to be a result of climate change for which humans are responsible.

    Answer this PYQ in the comment box:

    Q.Consider the following statements:

    1. Jet streams occur in the Northern Hemisphere only.
    2. Only some cyclones develop an eye.
    3. The temperature inside the eye of a cyclone is nearly 100C lesser than that of the surroundings.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3 only

    (c) 2 only

    (d) 1 and 3 only