Effect of farmland expansion on drought over the past century in Songnen Plain,Northeast China

作     者：YU Wanhui ZHANG Lijuan ZHANG Hongwen JIANG Lanqi ZHANG Ankang Pan Tao 于万辉;张丽娟;张宏文;姜蓝齐;张安康;潘涛

作者机构：Key Laboratory of Remote Sensing Monitoring of Geographic EnvironmentCollege of Heilongjiang ProvinceHarbin Normal UniversityHarbin 150025China Key Laboratory of Land Surface Process and Climate Change in Northwest Institute of Eco-Environment and ResourcesCASLanzhou 730000China Heilongjiang Province Institute of Meteorological SciencesInnovation and Opening Laboratory of Regional Eco-Meteorology in NortheastChina Meteorological AdministrationHarbin 150030China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2020年第30卷第3期

页      面：439-454页

核心收录：

学科分类：0709[理学-地质学] 09[农学] 0904[农学-植物保护] 0704[理学-天文学] 

基　　金：National Natural Science Foundation of China,No.41771067 Natural Science Foundation of Heilongjiang Province,No.D2018007 

主　　题：drought effect farmland expansion centennial-scale changes Songnen Plain 

摘      要：The effects of human activities on climate change are a significant area of research in the field of global environmental *** use and land cover change(LUCC)has a greater effect on climate than greenhouse gases,and the effect of farmland expansion on regional drought is particularly *** the 1910s to the 2010s,cultivated land in Songnen Plain increased by 2.67 times,the area of cultivated land increased from 4.92×10^4 km^2 to 13.14×10^4 km^2,and its percentage of all land increased from 25%to 70%.This provides an opportunity to study the effects of the conversion of natural grassland to farmland on *** this study,the drought indices in Songnen Plain were evaluated from the 1910s to the 2010s,and the effect of farmland expansion on drought was investigated using statistical methods and the Weather Research and Forecasting Model based on UK’s Climatic Research Unit *** resulting dryness index,Palmer drought severity index,and standardized precipitation index values indicated a significant drying trend in the study area from 1981 to *** trend can be attributed to increases in maximum temperature and diurnal temperature range,which increased the degree of *** on statistical analysis and simulation,the maximum temperature,diurnal temperature range,and sensible heat flux increased during the growing season in Songnen Plain over the past 100 years,while the minimum temperature and latent heat flux *** findings indicate that farmland expansion caused a drying trend in Songnen Plain during the study period.