ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY

• Published in: Journal of Tropical Meteorology Vol. 22; no. 2; pp. 243 - 251
• Main Author: 何云玲 张一平 吴志杰
• Format: Journal Article
• Language: English
• Published: Guangzhou Guangzhou Institute of Tropical & Marine Meteorology 01.06.2016
• Subjects: Climate change; Environmental impact; Freshwater; Mountains; Precipitation; Productivity; River ecology; Studies; Temperature; Topography; Trends; Weather; Tibetan Plateau; Yangtze River; China, People's Rep., Jinsha R; China, People's Rep
• ISSN: 1006-8775
• DOI: 10.16555/j.1006-8775.2016.02.014

Monthly mean surface air temperatures and precipitation at 20 meteorological stations in the Jinsha River Valley（JRV） of southwest China were analyzed for temporal-spatial variation patterns during the period 1961-2010.The magnitude of a trend was estimated using Sen＇s Nonparametric Estimator of Slope approach.The statistical significance of a trend was assessed by the MK test.The results showed that mean annual air temperature has been increasing by 0.08℃/decade during the past 50 years as a whole.The climate change trend in air temperature was more significant in the winter（0.13℃/decade） than in the summer（0.03℃/decade）.Annual precipitation tended to increase slightly thereafter and the increasing was mainly during the crop-growing season.Both the greatest variation of the annual mean temperature and annual precipitation were observed at the dry-hot valley area of middle reaches.Significant warming rates were found in the upper reaches whereas the dry-hot basins of middle reaches experienced a cooling trend during the past decades.Despite of the overall increasing in precipitation,more obvious upward-trends were found in the dry-hot basins of middle reaches whereas the upper reaches had a drought trend during the past decades.