Climate elements are important indicators of climate change in China's main grain-producing areas during the April-September growth season and affect the growth and yield of crops. This paper combines grain concentration and geographical detector to divide the North and South regions of China's main grain production. The linear trend and Morlet wavelet transform methods are used to analyse the characteristics of climate change based on observational climate data from April to September 1981-2015. The results show that the climate in the North region is warm and dry during the growth season, whereas the climate is warm and humid in the South region. The main periods of the change in temperature in the North and South regions are 3years, and that in precipitation is 5years, and that in sunshine hours is 3-4years. Changes in the climate elements in various provinces show complex, varying and regional characteristics of cold-warm and dry-wet cycles. The changes in climate elements are significant and different climatic conditions and regions have various possible impacts on grain production in China during the growth season. For China's agricultural-economy sustainable development and grain security, the study suggests that governments should place more emphasis on climatic element changes during the growth season and invest more money in disaster prevention and mitigation, especially in the main grain-producing areas.
1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Fac Geog Sci, Beijing 100875, Peoples R China 2.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou 519082, Guangdong, Peoples R China 3.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation:
Chou, Jieming,Xu, Yuan,Dong, Wenjie,et al. Research on the variation characteristics of climatic elements from April to September in China's main grain-producing areas[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2019-01-01,137(3-4):3197-3207