DOI: 10.1007/s11442-020-1736-5
论文题名: Effect of farmland expansion on drought over the past century in Songnen Plain, Northeast China
作者: Yu W. ; Zhang L. ; Zhang H. ; Jiang L. ; Zhang A. ; Pan T.
刊名: Journal of Geographical Sciences
ISSN: 1009637X
出版年: 2020
卷: 30, 期: 3 语种: 英语
英文关键词: centennial-scale changes
; drought effect
; farmland expansion
; Songnen Plain
英文摘要: The effects of human activities on climate change are a significant area of research in the field of global environmental change. Land 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 important. From the 1910s to the 2010s, cultivated land in Songnen Plain increased by 2.67 times, the area of cultivated land increased from 4.92×104 km2 to 13.14·104 km2, 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 climate. In 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 data. The resulting dryness index, Palmer drought severity index, and standardized precipitation index values indicated a significant drying trend in the study area from 1981 to 2010. This trend can be attributed to increases in maximum temperature and diurnal temperature range, which increased the degree of drought. Based 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 decreased. The findings indicate that farmland expansion caused a drying trend in Songnen Plain during the study period. © 2020, Science in China Press2020. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158939
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, Harbin, 150025, China; Key Laboratory of Land Surface Process and Climate Change in Northwest Institute of Eco-Environment and Resources, CAS, Lanzhou, 730000, China; Heilongjiang Province Institute of Meteorological Sciences; Innovation and Opening Laboratory of Regional Eco-Meteorology in Northeast, China Meteorological Administration, Harbin, 150030, China
Recommended Citation:
Yu W.,Zhang L.,Zhang H.,et al. Effect of farmland expansion on drought over the past century in Songnen Plain, Northeast China[J]. Journal of Geographical Sciences,2020-01-01,30(3)