中国黑戈壁地区日照时数时空变化及影响因素  

Variation of Sunshine Duration and Its Influencing Factors in Black Gobi Desert of China

作　　者：李雪[1] 郑新江[1] 咸迪[1] 崔小平[1] 王军 

机构地区：[1]国家卫星气象中心,北京100081 [2]甘肃省马鬃山气象站,甘肃酒泉736301

出　　处：《干旱气象》2013年第3期471-475,共5页Journal of Arid Meteorology

基　　金：中国林业科学研究院重大项目"中国黑戈壁区生态本底调查(CAFYBB2011002)"资助

摘　　要：利用1960～2011年中国黑戈壁地区11个气象站日照时数数据，分析了该地区日照多年变化特征。研究表明，该地区近52a来日照时数减少的变化并不明显，其趋势变化率为-2．0h／10a，远小于周边地区。四季之中，春季日照时数呈增加趋势，其他三季呈减少趋势。从空间分布上看，不同区域，年日照时数变化也不相同。黑戈壁地区年日照时数的减少与年降水量的显著增加和年平均风速的减小密切相关。The variation characteristic of sunshine duration over Black Gobi Desert of China was analyzed on the basis of monthly sun- shine duration series （ 1960 - 2011 ） from 11 surface meteorological stations. The results indicated that although sunshine duration was decreasing markedly in most parts of China, in Black Gobi Desert, the variation of sunshine duration was steady and showed an insig- nificant trend with a decreasing rate of - 2.0 1!/10 a in recent 52 years, which was much less than that of surrounding areas. Among the four seasons, the sunshine duration showed an increasing tendency with a rate of 0.34 11/10 a in spring, but a negative trend oc- curred in other seasons, especially in winter, the decreasing trend was significant with a rate of - 3.04 ll/10 a. For different regions, annual sunshine hours variation was not the same, in the northern foot of the Tianshan Mountains and the western Qilian Mountains and the parts of west side of Alxa Plateau, the sunshine duration showed an decreasing tendency, but in the Hami basin, Dunhuang basin and most parts of Beishan, it showed an increasing tendency. The decrease of sunshine hours in Black Gobi Desert was closely related to obvious increase of annum precipitation and decrease of annual mean wind speed there.

关 键 词：黑戈壁 日照时数 趋势 突变 影响因素 

分 类 号：P468.027[天文地球—大气科学及气象学]