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Historically, numerous climate changes have been recorded in china. For instance, during the period from 8000 – 5000BC it was noticed that the temperature was remarkably warm and moist. Comparing to the present temperature, both annual precipitation and average temperatures were quite higher than the present mainly when the summer monsoon faced towards north westward. From the 12th to 17th centuries, an annual temperature which is l-2°C lower than the present was recorded and this was historically known by the name Little Ice Age. Over the past many years, except little temperature fluctuation it looks China’s climate become warmer and warmer (Barry and Cai, 1966).
According to the National Assessment Report on Climate Change which indicated that the average temperature in China has risen by 1.1oc. Over the past 30 years, sea surface temperature and sea level have increased 0.9oC and 90 millimeters (mm) respectively. Comparing with 1961-1990, by the year 2020, China’s average annual temperature and precipitation will increase between 1.1°C-1.2°C and 2% – 3% respectively. Similarly, by 2050 an average temperature rise of 2.3–3.30C will be grow up and reaches to 3.9 – 6.00C by 2100. It is also predicted that due to climate change the Annual precipitation in China will increase between 5 – 7% and 11–17% by the year 2050 and 2100 respectively (Huang and Wang et al. 2010). Every year an estimated loss of $25 to 37.5 billion has been associated with extreme weather events and for the past 10 years, global warming affects the china’s soybean and corn production sector which caused a net economic loss of $595–858 million. By 2100, these two vital crops which are considered as pillars of china’s agricultural economy are projected to decline by 3–12% and 7–19% respectively (Shuai et al. 2016).

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