摘要
文章利用ISCCP月平均云气候资料集的总云量数据,分析了总云量在全球的时空分布,并对四季云量分布进行对比;采用趋势分析和旋转经验正交函数分解的方法,比较了1983—2009年全球平均总云量的变化趋势,结果显示:27a以来全球云量总体呈现减少趋势,尤其是赤道太平洋地区最明显,高纬度地区云量略有增加。云量低值中心位于南北回归线附近,赤道辐合带有一云量高值中心。总体而言,南半球云量多于北半球,洋面云量多于陆面;春夏两季云量多于秋冬两季。
In this paper,we use the total cloud amount data of ISCCP monthly average cloud climate dataset(D2)to analyze the spatial and temporal distribution of total cloud cover in the world and compare the distribution of cloud cover in the four seasons.And we compare the trend of global average total cloud cover from 1983 to 2009 by using trend analysis and rotational empirical orthogonal function decomposition(REOF).The results show that the global average total cloud amount has changed over the past 27 years.Overall,the global cloud volume showed a decreasing trend,especially in the equatorial Pacific region,and increased slightly in the high latitudes.The low cloud center is located near the north-south tropic line,and the equatorial convergence has a cloud high value center.In general,the southern hemisphere has more clouds than the northern hemisphere,and the ocean surface has more clouds than the land surface.The amount of clouds in spring and summer is more than that in autumn and winter.
作者
辛悦
姜艳丰
王晨
Xin Yue;Jiang Yanfeng;Wang Chen(College of Atmospheric Sciences of Lanzhou University,gansu Lanzhou 730000;Inner Mongolia Meteorological Science Research Institute,Inner Mongolia Hohhot 010051)
出处
《内蒙古气象》
2019年第2期12-16,共5页
Meteorology Journal of Inner Mongolia
