中国北方沙漠戈壁区沙尘气溶胶与太阳辐射的关系  

Relationship between dust aerosol and solar radiation in gebi desert in North China

作　　者：邓祖琴[1] 韩永翔[1,2] 白虎志[1] 赵天良 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州730020 [2]南京信息工程大学大气科学学院,江苏南京210044 [3]加拿大环境署空气质量研究部

出　　处：《中国环境科学》2011年第11期1761-1767,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(41075113);国家科技支撑计划(2008BAC40B04);甘肃省自然科学基金项目(2008GS01964)

摘　　要：利用中国大陆气溶胶指数(TOMS AI)、天文总辐射、地面太阳总辐射和沙尘能见度等观测和理论计算资料,对中国北方沙漠戈壁区沙尘气溶胶与太阳辐射的关系进行了分析.结果表明:沙漠地区太阳辐射和沙尘气溶胶指数有非常高的相关性,且变化趋势一致.表明由太阳辐射触发的热对流是影响沙漠地区沙尘气溶胶最主要的因子;沙尘气溶胶进入大气中,必然也会对太阳辐射产生重大的影响.晴日时沙尘气溶胶吸收和散射辐射可达沙尘暴(含扬沙)天气时的60%以上.Relationship between dust aerosol and solar radiation in gebi desert in North China was analyzed based on observational and calculative data, such as TOMS aerosol index （AI）, total astronomical radiation, total solar radiation and dust visibility, in China mainland. It turns out that there were perfect correlation and same trend between the total solar radiation and AI, suggesting that the thermal convection triggered by solar radiation was the most important factor for dust aerosol. It also shows that the input of dust aerosol in atmosphere would affect solar radiation significantly and persistently. Besides these, the ratio of absorption and scattering of solar radiation by dust aerosol between fine days and sandstorm was above 60%.

关 键 词：沙尘气溶胶 太阳辐射 热对流:吸收和散射辐射 

分 类 号：X513[环境科学与工程—环境工程]