Changes in extreme temperature events over the Hindu Kush Himalaya during 1961e2015  

作　　者：SUN Xiu-Bao REN Guo-Yu Arun Bhaka SHRESTHA REN Yu-Yu YOU Qing-Long ZHAN Yun-Jian XU Yan Rupak RAJBHANDARI 

机构地区：[1]College of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044, China [2]Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China [3]Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing 100081, China [4]International Centre for Integrated Mountain Development, Kathmandu 3226, Nepal [5]National Meteorological Information Center, China Meteorological Administration, Beijing 100081, China [6]Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China [7]Department of Meteorology, Tri-Chandra Campus, Tribhuvan University, Kathmandu 3226, Nepal

出　　处：《Advances in Climate Change Research》2017年第3期157-165,共9页气候变化研究进展（英文版）

摘　　要：This study uses the CMA (China Meteorological Administration) global land-surface daily air temperature dataset V1.0 (GLSATD V1.0) to analyze long-term changes in extreme temperature events over the Hindu Kush Himalaya (HKH) during 1961e2015. Results show there was a significant decrease in the number of extreme cold events (cold nights, cold days, and frost days) but a significant increase in the number of extreme warm events (warm nights, warm days, and summer days) over the entire HKH during 1961e2015. For percentile-based indices, trends of extreme events related to minimum temperature (Tmin) were greater in magnitude than those related to maximum temperature (Tmax). For absolute-value based indices, maximum Tmax, minimum Tmin, and summer days all show increasing trends, while frost days and the diurnal temperature range (DTR) show significant decreasing trends. In addition, there was a decrease in extreme cold events in most parts of east HKH, particularly in Southwest China and the Tibetan Plateau, while there was a general increase in extreme warm events over the entire HKH. Finally, the change in extreme cold events in the HKH appears to be more sensitive to elevation (with cold nights and cold days decreasing with elevation), whereas the change in warm extremes (warm nights, warm days, and maximum Tmax) shows no detectable relationship with elevation. Frost days and minimum Tmin also have a good relationship with elevation, and the trend in frost days decreases with an increase in elevation while the trend in minimum Tmin increases with an increase in elevation.

关 键 词：Climate change EXTREME TEMPERATURE events HKH LAND-SURFACE air TEMPERATURE Elevation-dependent WARMING 

分 类 号：P[天文地球]