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[1]WU Jinhua,SHENG Zhilu,DU Jiaqiang,et al.Spatiotemporal Change Patterns of Temperature and Precipitation in Northeast China from 1956 to 2017[J].Research of Soil and Water Conservation,2021,28(03):340-347.

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Spatiotemporal Change Patterns of Temperature and Precipitation in Northeast China from 1956 to 2017

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 03 Page number: 340-347 Column: Public date: 2021-04-20

Title:: Spatiotemporal Change Patterns of Temperature and Precipitation in Northeast China from 1956 to 2017

Author(s):: WU Jinhua¹, SHENG Zhilu¹, DU Jiaqiang¹, ZHANGYANG Chengsi¹, ZHANG Jing^1,2; (1.Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 2.School of Life Sciences, Lanzhou University, Lanzhou 730030, China)

Keywords:: Northeast China; temperature; precipitation; mutation test; fisher optimal segmentation; spatiotemporal change

CLC:: P467

DOI:: -

Abstract:: Under the background of climate change, the temporal and spatial variation characteristics of temperature and precipitation in Northeast China in recent 60 years were analyzed. Based on the observation data from 102 meteorological stations in Northeast China from 1956 to 2017, the temporal and spatial characteristics of temperature and precipitation were analyzed by methods of trend analysis, mutation detection, fisher optimal segmentation and spatial analysis. The results indicated that:(1)the annual average temperature presented significant increasing trend with a tendency rate of 0.327 °C/decade(p<0.001); before the year 1987, temperature was relatively low, and increased since then; precipitation fluctuated greatly from 1956 to 2017, the decreasing rate was -3.634 mm/decade(p>0.05); the fluctuating process of precipitation was unstable;(2)an abrupt change of temperature increasing was observed in 1987—1988(p<0.05); temperature increased in stages; abrupt changes of precipitation were observed around 1964, 1983 and 1999(p<0.05); the fluctuation of precipitation was relatively great in 2010—2017, during which droughts and floods occurred frequently;(3)temperature decreased from southern to the northern gradually; the study area warmed up generally; the areas where temperature increased greatly in adjacent periods were Hulunbuir Plateau, Xiao Hinggan Mountains, Da Hinggan Mountains and Liaohe Plain in turn, and the temperature increase had slowed down; precipitation decreased from southeastern to northwestern; precipitation fluctuated cyclically in adjacent periods, and had entered the stage of wet season since 2010.

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Last Update: 2021-04-20