South Asia, is the home for one fifth of the world’s population and is known to be the most disaster region in the world regarded as world’s poor region. In South Asia, bout 456 million people are estimated to be undernourished. In the recent past, climate change appeared as most critical issue facing by the society on a global basis, with serious problems of food security of billions of people in the developing countries. The inter-annual, monthly and daily distribution of climate variables like temperature, radiation, precipitation, water vapor pressure in the air and wind speed affects a number of physical, chemical and biological processes that responsible for the productivity of various systems like agricultural, forestry and fisheries
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Natural reasons result in climate variability over different time scales but they are least responsible for a significant change in climate. Solar and volcanic activities fall under natural processes and they cause short lived changes in weather conditions as a result producing fluctuations in climatic pattern. Land, ocean and atmosphere interactions have been resulting into usual cyclic variations in weather and hence climatic conditions over the globe. Anthropogenic activities are mainly blamed for global warming and climate change. Anthropogenic reasons are controllable but they been dominating now over the natural, due to which balance of the atmospheric heat budget has been disturbed and more amount of heat has been stuck in the biosphere than usually required to control the life processes (Peter et al., 1997). After Industrial revolution, the atmospheric composition changed drastically due to the addition of the emitted greenhouse gases which have very high warming potential and long life time to existing in the biosphere (Montzka et al., …show more content…
More climate events may endorse plant disease and pest outbreaks (Gan, 2004). The flood’s destruction in South Asia’s low-lying and urban areas is cruelly complemented by the effects that drought and variation in periodic rainfall will have on agriculture. Extreme heat is already disrupting the growing season in Pakistan, India, and Bangladesh. Wheat production in the Indian, fertile areas of Pakistan and Bangladesh, may decrease up to 50 percent by 2100, harming the millions of people who rely on it for food. As monsoons shifting affect the quantity of water available for irrigation, a major drop in the standard of living is one of the world’s most guaranteed water-stressed areas. By mid-century, the IPCC projects that climate change will make South Asia home to the "largest numbers of food-insecure
Natural reasons result in climate variability over different time scales but they are least responsible for a significant change in climate. Solar and volcanic activities fall under natural processes and they cause short lived changes in weather conditions as a result producing fluctuations in climatic pattern. Land, ocean and atmosphere interactions have been resulting into usual cyclic variations in weather and hence climatic conditions over the globe. Anthropogenic activities are mainly blamed for global warming and climate change. Anthropogenic reasons are controllable but they been dominating now over the natural, due to which balance of the atmospheric heat budget has been disturbed and more amount of heat has been stuck in the biosphere than usually required to control the life processes (Peter et al., 1997). After Industrial revolution, the atmospheric composition changed drastically due to the addition of the emitted greenhouse gases which have very high warming potential and long life time to existing in the biosphere (Montzka et al., …show more content…
More climate events may endorse plant disease and pest outbreaks (Gan, 2004). The flood’s destruction in South Asia’s low-lying and urban areas is cruelly complemented by the effects that drought and variation in periodic rainfall will have on agriculture. Extreme heat is already disrupting the growing season in Pakistan, India, and Bangladesh. Wheat production in the Indian, fertile areas of Pakistan and Bangladesh, may decrease up to 50 percent by 2100, harming the millions of people who rely on it for food. As monsoons shifting affect the quantity of water available for irrigation, a major drop in the standard of living is one of the world’s most guaranteed water-stressed areas. By mid-century, the IPCC projects that climate change will make South Asia home to the "largest numbers of food-insecure