This article needs to be updated.(May 2019) |
Climate change in South Asia is having significant impacts already which are expected to intensify as global temperatures rise due to climate change. The South Asia region consists of the eight countries: Afghanistan, [note 1] Pakistan, India, Nepal, Bhutan, Bangladesh, the Maldives and Sri Lanka. In the 2017 edition of Germanwatch's Climate Risk Index, Bangladesh and Pakistan ranked sixth and seventh respectively as the countries most affected by climate change in the period from 1996 to 2015, while India ranked fourth among the list of countries most affected by climate change in 2015. [4] The Indian subcontinent is one of the most vulnerable regions globally to a number of direct and indirect effects of climate change, including sea level rise, cyclonic activity, and changes in ambient temperature and precipitation patterns. Ongoing sea level rise has already submerged several low-lying islands in the Sundarbans region, displacing thousands of people.
Among the countries of South Asia, Bangladesh is likely to be the worst affected by climate change. This is owing to a combination of geographical factors, such as its flat, low-lying, and delta-exposed topography, [5] and socio-economic factors, including its high population density, levels of poverty, and dependence on agriculture. [6] Its sea level, temperature, and evaporation are increasing, and the changes in precipitation and cross-boundary river flows are already beginning to cause drainage congestion. There is a reduction in freshwater availability, disturbance of morphological processes,[ clarification needed ] and a higher intensity of flooding.
Bangladesh only contributes 0.21% [7] [ unreliable source? ] of the world's emissions yet it has 2.11% of the world's population. [8] [ unreliable source? ] In contrast, the United States makes up about 4.25 percent [9] [ unreliable source? ] of the world's population, yet they produce approximately 15 percent of the pollution [10] that causes global warming.
According to data from 2020, China, the United States, India, and Russia are the world's biggest emitters of CO2. [10]
Regarding local temperature rises, the IPCC figure shows that mean annual value of temperature rise by the end of the century in South Asia is 3.3 °C with the min-max range as 2.7 – 4.7 °C. The mean value for Tibet would be higher with mean increase of 3.8 °C and min-max figures of 2.6 and 6.1 °C respectively, which implies harsher warming conditions for the Himalayan watersheds. [11]
Increased landslides and flooding are projected to have an impact upon states such as Assam. [12] Ecological disasters, such as a 1998 coral bleaching event that killed off more than 70% of corals in the reef ecosystems off Lakshadweep and the Andamans, and was brought on by elevated ocean temperatures tied to global warming, are also projected to become increasingly common. [13] [14] [15]
The global average sea level rose by 3.1 mm per year from 1993 to 2003. [16] More recent analysis of a number of semi empirical models predict a sea level rise of about 1 metre by the year 2100. [17] Ongoing sea level rises have already submerged several low-lying islands in the Sundarbans, displacing thousands of people. [18] Temperature rises on the Tibetan Plateau are causing Himalayan glaciers to retreat. It has been predicted that the historical city of Thatta and Badin, in Sindh, Pakistan would have been swallowed by the sea by 2025, as the sea is already encroaching 80 acres of land here, every day. [19]
Some territories in India were already evacuated due to increase in tidal flooding. Large part of some Indian cities will be below tide-level by 2030: Mumbai, Kolkata, Cuttack, Kochi and more. Navi Mumbai will be below this level almost entirely. [20]
In October 2019, a study was published in the Nature Communications journal. The journal claims that the number of people who will be impacted from sea level rise during 21st century is 3 times higher than the previous expected number. By 2050, 150 million will be under the water line during high tide and 300 million will live in zones with flooding every year. By the year 2100, those numbers differ sharply depending on the emission scenario. In a low emission scenario, 140 million will be under water during high tide and 280 million will have flooding each year. In high emission scenario, the numbers reach up to 540 million and 640 million, respectively. 70% of these people will live in 8 countries in Asia: China, Bangladesh, India, Indonesia, Thailand, Vietnam, Japan, and the Philippines. Large parts of Ho Chi Minh City, Mumbai, Shanghai, Bangkok and Basra could be inundated. [21] [22]
Population that will live in a zone of annual flooding by 2050 in millions, in 6 countries in Asia, according to old and new estimates: [23]
Country | Old estimate | New estimate |
---|---|---|
China | 29 | 93 |
Bangladesh | 5 | 42 |
India | 5 | 36 |
Vietnam | 9 | 31 |
Indonesia | 5 | 23 |
Thailand | 1 | 12 |
India has the world's highest social cost of carbon. [24] The Indira Gandhi Institute of Development Research has reported that, if the predictions relating to global warming made by the Intergovernmental Panel on Climate Change come to fruition, climate-related factors could cause India's GDP to decline by up to 9%; contributing to this would be shifting growing seasons for major crops such as rice, production of which could fall by 40%. Around seven million people are projected to be displaced due to, among other factors, submersion of parts of Mumbai and Chennai, if global temperatures were to rise by a mere 2 °C (3.6 °F). [25]
If severe climate changes occur, Bangladesh will lose land along the coast line. [26] [ unreliable source? ] This will be highly damaging to Bangladeshis especially because about 50% population of Bangladeshis are employed in the agriculture sector, [27] with rice as the largest production. [28] [29] If no further steps are taken to improve the current conditions global warming will affect the economy severely worsening the present issues further. [30] The climate change would increase expenditure towards health care, cool drinks, alcoholic beverages, air conditioners, ice cream, cosmetics, agricultural chemicals, and other products. [31]
Climate Change in India and Pakistan will have a disproportionate impact on the more than 400 million that make up India's poor. This is because so many depend on natural resources for their food, shelter and income. More than 56% of people in India work in agriculture, while in Pakistan 43% of its population work in agriculture while many others earn their living in coastal areas. [32]
Heat waves' frequency and power are increasing in India because of climate change. The number of heat wave days has increased — not just day temperature, night temperatures increased also. 2018 was the country's sixth hottest year on record, and 11 of its 15 warmest years have occurred since 2004. The capital New Delhi broke its all-time record with a high of 48 degrees Celsius. [33] The government is being advised by the Indian Institute of Tropical Meteorology in predicting and mitigating heat waves. The government of Andhra Pradesh, for instance, is creating a Heat Wave Action Plan. [34]
Villagers in India's North Eastern state of Meghalaya are also concerned that rising sea levels will submerge neighboring low-lying Bangladesh, resulting in an influx of refugees into Meghalaya which has few resources to handle such a situation. [35] [36]
There are many concrete steps which can be taken to address the threat of climate change. Incentives can be provided for electric vehicles or public transport and this curb the impact of the transportation sector. However, though these suggestions have been made, there is no political will to carry them out. Households can be given electricity and slowly phasing out LPG (the current trend is to increase the usage of the latter). Rainwater can be harvested and the rivers could be restored to their original flow so that they can bring back the wetlands and the natural ways of silt, nutrient and wildlife flow. All of these use technologies and can be implemented by the 11-year period the IPCC has stipulated before which any change must be made if we are to evade the adverse effects of climate change. So far, though the initiatives by the Delhi Metro to switch to solar power- or similar efforts by Kochi airport-are a step in the right direction, such moves are few and far between. These models should be taken up by other agents as well. [34]
The latest accord, the 2015 Paris Agreement, takes a different approach. The 197 signatory countries have promised to limit global temperature increase to just 1.5 °C over pre-industrialization levels, but each country has set its own targets. India, for instance, has promised to cut its emissions intensity (emissions per unit of GDP) by 33-35% by 2030 compared to 2005 levels (Chart 1a/ 1b). [37]
The Asia-Pacific Climate Change Adaption Information Platform (AP-PLAT) was launched in 2019. It aims to provide Asia and Pacific countries with data on climate change and convert it to adaptation and resilience measures. [38]
Climate change in Afghanistan has led to a temperature increase of 1.8°C since 1950 in the country. This has caused far-reaching impacts on Afghanistan, culminating from overlapping interactions of natural disasters (due to changes in the climate system), conflict, agricultural dependency, and severe socio-economic hardship.
Combined with infrequent earthquakes, climate-related disasters such as floods, flash floods, avalanches and heavy snowfalls on average affect over 200,000 people every year, [39] causing massive losses of lives, livelihoods and properties. [40] [41] [42] [43] These interacting factors, particularly protracted conflicts which erode and challenge the ability to handle, adapt to and plan for climate change at individual and national levels, often turn climate change risks and hazards into disasters.
Although the country itself contributes only very little to global warming with regards to greenhouse gas emissions, droughts due to climate change affect and will affect Afghanistan to a high degree.
Due to a combination of political, geographic, and social factors, Afghanistan is one of the most vulnerable nations to climate change impacts in the world, [44] [45] ranked 179 out of 185 countries. [46] [47] [48] As of 2021, the Asian Development Bank (ADB) has committed more than $900 million, [49] for irrigation and agriculture infrastructure projects to help with food security, agribusiness, and enhancement of water resources management through a climate resilience approach. [50]Climate change in India is having profound effects on India, which is ranked fourth among the list of countries most affected by climate change in 2015. [56] India emits about 3 gigatonnes (Gt) CO2eq of greenhouse gases each year; about two and a half tons per person, which is less than the world average. [57] The country emits 7% of global emissions, despite having 17% of the world population. [58] Temperature rises on the Tibetan Plateau are causing Himalayan glaciers to retreat, threatening the flow rate of the Ganges, Brahmaputra, Yamuna and other major rivers. A 2007 World Wide Fund for Nature (WWF) report states that the Indus River may run dry for the same reason. [59] Heat waves' frequency and intensity are increasing in India because of climate change. Severe landslides and floods are projected to become increasingly common in such states as Assam. [60] The climate change performance index of India ranks eighth among 63 countries which account for 92% of all GHG emissions in the year 2021. [61]
Temperatures in India have risen by 0.7 °C (1.3 °F) between 1901 and 2018. [62]
According to some current projections, the number and severity of droughts in India will have markedly increased by the end of the present century. [63]Bangladesh is a densely populated, low-lying, mainly riverine country located in South Asia with a coastline of 720 km (447 mi) on the northern littoral of the Bay of Bengal. The delta plain of the Ganges (Padma), Brahmaputra (Jamuna), and Meghna Rivers and their tributaries occupy 79 percent of the country. Four uplifted blocks occupy 9 percent and steep hill ranges up to approximately 1,000 metres (3,300 ft) high occupy 12 percent in the southeast and in the northeast. Straddling the Tropic of Cancer, Bangladesh has a tropical monsoon climate characterised by heavy seasonal rainfall, high temperatures, and high humidity. Natural disasters such as floods and cyclones accompanied by storm surges periodically affect the country. Most of the country is intensively farmed, with rice the main crop, grown in three seasons. Rapid urbanisation is taking place with associated industrial and commercial development. Exports of garments and shrimp plus remittances from Bangladeshis working abroad provide the country's three main sources of foreign exchange income.
Climate change affects the physical environment, ecosystems and human societies. Changes in the climate system include an overall warming trend, more extreme weather and rising sea levels. These in turn impact nature and wildlife, as well as human settlements and societies. The effects of human-caused climate change are broad and far-reaching. This is especially so if there is no significant climate action. Experts sometimes describe the projected and observed negative impacts of climate change as the climate crisis.
Natural catastrophe in India, many of them related to the climate of India, cause massive losses of life and property. Droughts, flash floods, cyclones, avalanches, landslides brought by torrential rains, and snowstorms pose the greatest threats. A natural disaster might be caused by earthquakes, flooding, volcanic eruption, landslides, hurricanes etc. In order to be classified as a disaster, it will need to have a profound environmental effect and/or human loss and frequently incurs a financial loss. Other dangers include frequent summer dust storms, which usually track from north to south; they cause extensive property damage in North India and deposit large amounts of dust and dirt from arid regions. Hail is also common in parts of India, causing severe damage to standing crops such as rice and wheat and many more crops and effects many people.
Germanwatch e.V., usually called Germanwatch, is a non-profit, non-governmental organization based in Bonn, Germany. It seeks to influence public policy on trade, the environment, and relations between countries in the industrialized north and underdeveloped south. The organization collates a variety of economic and social data to formulate position papers, often in partnership with other NGOs. Particular areas of interest include trade in food and agricultural policy, climate change, and corporate accountability.
Climate change is an urgent and significant issue affecting Japan. In recent years, the country has observed notable changes in its climate patterns, with rising temperatures serving as a prominent indicator of this phenomenon. As an archipelago situated in northeastern Asia, Japan is particularly vulnerable to the impacts of climate change due to its diverse geography and exposure to various weather systems. The nation experiences a broad range of climates, spanning from the frigid winters of Hokkaido to the subtropical climates of Okinawa. Changes in temperature patterns have the potential to disrupt ecosystems, impact agricultural productivity, modify water resources, and pose significant challenges to infrastructure and human settlements.
Climate change has led to the United States warming by 2.6 °F since 1970. The climate of the United States is shifting in ways that are widespread and varied between regions. From 2010 to 2019, the United States experienced its hottest decade on record. Extreme weather events, invasive species, floods and droughts are increasing. Climate change's impacts on tropical cyclones and sea level rise also affects regions of the country.
Between 1901 and 2018, the average global sea level rose by 15–25 cm (6–10 in), or an average of 1–2 mm per year. This rate accelerated to 4.62 mm/yr for the decade 2013–2022. Climate change due to human activities is the main cause. Between 1993 and 2018, thermal expansion of water accounted for 42% of sea level rise. Melting temperate glaciers accounted for 21%, with Greenland accounting for 15% and Antarctica 8%. Sea level rise lags changes in the Earth's temperature. So sea level rise will continue to accelerate between now and 2050 in response to warming that is already happening. What happens after that will depend on what happens with human greenhouse gas emissions. Sea level rise may slow down between 2050 and 2100 if there are deep cuts in emissions. It could then reach a little over 30 cm (1 ft) from now by 2100. With high emissions it may accelerate. It could rise by 1 m or even 2 m by then. In the long run, sea level rise would amount to 2–3 m (7–10 ft) over the next 2000 years if warming amounts to 1.5 °C (2.7 °F). It would be 19–22 metres (62–72 ft) if warming peaks at 5 °C (9.0 °F).
Fisheries are affected by climate change in many ways: marine aquatic ecosystems are being affected by rising ocean temperatures, ocean acidification and ocean deoxygenation, while freshwater ecosystems are being impacted by changes in water temperature, water flow, and fish habitat loss. These effects vary in the context of each fishery. Climate change is modifying fish distributions and the productivity of marine and freshwater species. Climate change is expected to lead to significant changes in the availability and trade of fish products. The geopolitical and economic consequences will be significant, especially for the countries most dependent on the sector. The biggest decreases in maximum catch potential can be expected in the tropics, mostly in the South Pacific regions.
Climate change and poverty are deeply intertwined because climate change disproportionally affects poor people in low-income communities and developing countries around the world. The impoverished have a higher chance of experiencing the ill-effects of climate change due to the increased exposure and vulnerability. Vulnerability represents the degree to which a system is susceptible to, or unable to cope with, adverse effects of climate change including climate variability and extremes.
Coastal flooding occurs when dry and low-lying land is submerged (flooded) by seawater. The range of a coastal flooding is a result of the elevation of floodwater that penetrates the inland which is controlled by the topography of the coastal land exposed to flooding. The seawater can flood the land via several different paths: direct flooding, overtopping of a barrier, or breaching of a barrier. Coastal flooding is largely a natural event. Due to the effects of climate change and an increase in the population living in coastal areas, the damage caused by coastal flood events has intensified and more people are being affected.
Climate change in Bangladesh is a critical issue as the country is one of the most vulnerable to the effects of climate change. In the 2020 edition of Germanwatch's Climate Risk Index, it ranked seventh in the list of countries most affected by climate calamities during the period 1999–2018. Bangladesh's vulnerability to climate change impacts is due to a combination of geographical factors, such as its flat, low-lying, and delta-exposed topography, and socio-economic factors, including its high population density, levels of poverty, and dependence on agriculture.
Climate change in Nepal is a major problem for Nepal as it is one of the most vulnerable countries to the effects of climate change. Globally, Nepal is ranked fourth, in terms of vulnerability to climate change. Floods spread across the foothills of the Himalayas and bring landslides, leaving tens of thousands of houses and vast areas of farmland and roads destroyed. In the 2020 edition of Germanwatch's Climate Risk Index, it was judged to be the ninth hardest-hit nation by climate calamities during the period 1999 to 2018. Nepal is a least developed country, with 28.6 percent of the population living in multidimensional poverty. Analysis of trends from 1971 to 2014 by the Department of Hydrology and Meteorology (DHM) shows that the average annual maximum temperature has been increasing by 0.056 °C per year. Precipitation extremes are found to be increasing. A national-level survey on the perception-based survey on climate change reported that locals accurately perceived the shifts in temperature but their perceptions of precipitation change did not converge with the instrumental records. Data reveals that more than 80 percent of property loss due to disasters is attributable to climate hazards, particularly water-related events such as floods, landslides and glacial lake outburst floods (GLOFs).
Climate change in Pakistan is a major issue for the country. Pakistan is highly vulnerable to climate change. As with the changing climate in South Asia as a whole, the climate of Pakistan has changed over the past several decades, with significant impacts on the environment and people. In addition to increased heat, drought and extreme weather in parts of the country, the melting of glaciers in the Himalayas has impacted some of the important rivers of Pakistan. Between 1999 and 2018, Pakistan ranked 5th in the countries affected by extreme weather caused by climate change.
The effect of climate change on small island countries can be extreme because of low-lying coasts, relatively small land masses, and exposure to extreme weather. The effects of climate change, particularly sea level rise and increasingly intense tropical cyclones, threaten the existence of many island countries, island peoples and their cultures, and will alter their ecosystems and natural environments. Several Small Island Developing States (SIDS) are among the most vulnerable nations to climate change.
Climate change in Rhode Island encompasses the effects of climate change, attributed to man-made increases in atmospheric carbon dioxide, in the U.S. state of Rhode Island.
Climate changein the Caribbean poses major risks to the islands in the Caribbean. The main environmental changes expected to affect the Caribbean are a rise in sea level, stronger hurricanes, longer dry seasons and shorter wet seasons. As a result, climate change is expected to lead to changes in the economy, environment and population of the Caribbean. Temperature rise of 2 °C above preindustrial levels can increase the likelihood of extreme hurricane rainfall by four to five times in the Bahamas and three times in Cuba and Dominican Republic. Rise in sea level could impact coastal communities of the Caribbean if they are less than 3 metres (10 ft) above the sea. In Latin America and the Caribbean, it is expected that 29–32 million people may be affected by the sea level rise because they live below this threshold. The Bahamas is expected to be the most affected because at least 80% of the total land is below 10 meters elevation.
Climate change in the Philippines is having serious impacts such as increased frequency and severity of natural disasters, sea level rise, extreme rainfall, resource shortages, and environmental degradation. All of these impacts together have greatly affected the Philippines' agriculture, water, infrastructure, human health, and coastal ecosystems and they are projected to continue having devastating damages to the economy and society of the Philippines.
Climate change in Afghanistan has led to a temperature increase of 1.8°C since 1950 in the country. This has caused far-reaching impacts on Afghanistan, culminating from overlapping interactions of natural disasters, conflict, agricultural dependency, and severe socio-economic hardship.
In Italy, widespread impacts of climate change are currently being felt. With an increase in extreme events such as heatwaves, droughts and more frequent flooding, Italy faces many challenges adapting to climate change.
Climate change in India is having profound effects on India, which is ranked fourth among the list of countries most affected by climate change in 2015. India emits about 3 gigatonnes (Gt) CO2eq of greenhouse gases each year; about two and a half tons per person, which is less than the world average. The country emits 7% of global emissions, despite having 17% of the world population. Temperature rises on the Tibetan Plateau are causing Himalayan glaciers to retreat, threatening the flow rate of the Ganges, Brahmaputra, Yamuna and other major rivers. A 2007 World Wide Fund for Nature (WWF) report states that the Indus River may run dry for the same reason. Heat waves' frequency and intensity are increasing in India because of climate change. Severe landslides and floods are projected to become increasingly common in such states as Assam. The climate change performance index of India ranks eighth among 63 countries which account for 92% of all GHG emissions in the year 2021.
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