| ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY |
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| 作者姓名： | 何云玲 张一平 吴志杰 |
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| 作者单位： | School of Resources & Environment and Earth Science, Yunnan University, Kunming 650091 China |
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| 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.
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| 关 键 词： | temperature precipitation trend analysis climate change Jinsha River Valley |
| 修稿时间： | 3/2/2016 12:00:00 AM |
ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY |
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| HE Yun-ling,ZHANG Yi-ping and WU Zhi-jie.ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY[J].Journal of Tropical Meteorology,2016,22(2):243-251. |
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| Authors: | HE Yun-ling ZHANG Yi-ping and WU Zhi-jie |
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| Institution: | School of Resources & Environment and Earth Science, Yunnan University, Kunming 650091 China |
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| Abstract: | 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. |
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| Keywords: | temperature precipitation trend analysis climate change Jinsha River Valley |
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