Precipitation, cloud cover and Forbush decreases in galactic cosmic rays

被引：21

作者：

Kniveton, DR ^{[1
]}

机构：

[1] Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2004年 / 66卷 / 13-14期

基金：

美国国家科学基金会;

关键词：

cosmic rays; clouds; precipitation; climate; ISCCP; Forbush decrease; solar variability;

D O I：

10.1016/j.jastp.2004.05.010

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The results of a study to explore variations in cloud cover, over regions that are minimally affected by rainfall and heavy rainfall, and that are coincident with variations in the galactic cosmic ray flux, are presented. Using an extensive record of global satellite derived cloud and rainfall products from the International Satellite Cloud Climatology Project D1 data series and Xie and Arkin (J. Climate 9 (1996) 840), epoch superposition analysis of a sample of events of short term decreases in the galactic cosmic ray flux, is conducted. Analysis of data that is largely free from the influence of rainfall and heavy rainfall, averaged over 10-degree geomagnetic latitude ( p) bands reveals that cloud cover is reduced at high latitudes, and at middle and lower (including equatorial) latitudes over regions of relatively higher cloud cover, over both land and ocean surfaces, while increasing over ocean surfaces at middle and lower latitudes in regions of thinner cloud. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1135 / 1142

页数：8

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