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气象:2001,27(10):20-24
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西双版纳勐仑地区40余年气候变化
(中国科学院西双版纳热带植物园生态站,云南勐仑 666303)
Climate Changes of Menglun in Xishuangbanna for the Last 40 Years
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中文摘要: 利用设置在西双版纳自然保护区内的勐仑气象站40余年( 1959~2000年)的资料,统计分析勐仑地区气候变化特征。结果表明,40余年来年平均气温呈上升趋势,上升率0.202℃/10年,升温主要是从20世纪80年代中期开始,其中干热季( 3~4月)升温最为显著。不同年代,平均最高气温与最低气温上升率有所不同。年降水量从50年代到80年代以53.0mm/10年速度下降,80年代末期降水量达到历史最低值,90年代降水量显著回升。相对湿度为明显下降趋势,干热季下降显著。日照时数变化稍复杂,有近似二次曲线的变化。勐仑地区气候变化的原因,主要是在大气候变化背景下,植被覆盖率变化所致。
Abstract:Based on the long-term observation data (1959-2000) of a meteorological station, which was set up inside the nature reserves in Xishuangbanna, Yunnan Province, the characteristics of local climate change is studied. The results in dicate that the annual mean air temperature has been gradually increasing since 1985, and with a more obvious trend in dry-hot season from March to April; meanw hile, there are some difference on increasing rate between the mean maximum and minimum temperatures; the annual precipitation attenuates remarkably with an ave rage rate of 53.0 mm/10yr from 1950 to 1990; the air relative humidity presents an obvious decreasing trend, especially in dry-hot season. The main cause of the climate change in this area is the change of tropical forest cover, combining i ts effects with global climate change.
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基金项目:中国科学院“九五”重大项目 (KZ951A1301),中国科学院“九五”特别支持项目(KZ95T04)资助
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引用文本:
李红梅,2001.西双版纳勐仑地区40余年气候变化[J].气象,27(10):20-24.
,2001.Climate Changes of Menglun in Xishuangbanna for the Last 40 Years[J].Meteor Mon,27(10):20-24.