ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY

• 来源期刊: 热带气象学报（英文版）
• 学科: 地球科学
• 年，卷（期）: 2016,（2）
• 页码范围: 243-251
• 页数: 9页
• 分类号: PP467
• 语种: 英文
• DOI: 10.16555/j.1006-8775.2016.02.014

摘要

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.