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当前位置: 首页 > 文章 > 近50年三江源地区低云量变化特征及与其他气候因子的关系 中国农学通报 2016,32 (13) 141-146
Position: Home > Articles > Variation of Low Cloud Amount and Its Correlation with Climatic Factors in Recent 50 Years in Three-River Source Region Chinese Agricultural Science Bulletin 2016,32 (13) 141-146

近50年三江源地区低云量变化特征及与其他气候因子的关系

作  者：
丁生祥;郭连云
单  位：
青海省海南州气象局;青海省同德县气象局
关键词：
三江源地区;云量;气候因子;影响;变化
摘  要：
为了探究三江源地区低云量的变化趋势以及与相关气候因子的关系,利用三江源地区同德气象局1961—2010年50年的低云量观测资料,分析低云量的变化特征及与相关气候因子的关系。结果表明,自1961年以来该地平均低云量呈显著增加趋势,四季平均低云量均呈增加趋势,春季、夏季和冬季低云量增加趋势显著。月平均低云量分布呈双峰型,6、7月是一年中低云量最多的月份,12月为最低值。突变分析表明,年、春季平均低云量分别在1964年、1965年发生了由多到少的突变,2002年、2001年发生了由少到多突变;秋季低云量在1963年发生了由多到少的突变;冬季低云量在2000年发生了由少到多的突变;夏季低云量未发生突变。对低云量影响最大的是平均气温、水汽压因子;其次是日照时数;再次平均风速。
译  名：
Variation of Low Cloud Amount and Its Correlation with Climatic Factors in Recent 50 Years in Three-River Source Region
作  者：
Ding Shengxiang;Guo Lianyun;Tongde Meteorological Bureau in Qinghai;Meteorological Bureau in Hainan State of Qinghai Province;
关键词：
Three-River Source Region;;cloud amount;;climatic factors;;influence;;change
摘  要：
Based on low cloud amount data collected during 1961-2010 by Tongde meteorological station in the Three- River Source Region, the variation of the low cloud amount was analyzed, and the correlationbetween the low cloud amount and climatic factors was discussed. The results showed that the mean amount oflow cloud increased significantly since 1961, the mean amount of low cloud of the four seasons showed anincreasing trend, and had a significant rising tendency in spring, summer and winter. The monthly mean lowcloud amount presented a bimodal distribution, June and July had the most low cloud cover in the year, whileDecember had the lowest value. Mutation analysis indicated that the mean low cloud amount of year and springchanged from more to less in 1964 and 1965, and from less to more in 2001 and 2002. The mean low cloudamount had an abrupt change from more to less in the autumn of 1963, while an abrupt change from less tomore took place in the winter of 2000, and there was no mutation of mean low cloud amount in summer. Thetemperature and water vapor pressure were the greatest influencing factors of low cloud amount; followed by hours of sunshine, and the third was the average wind speed.

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