摘要
利用CE-318太阳光度计,采用Bouguer-Lamber定律,反演郑州地区2008年气溶胶光学厚度,分析该地区气溶胶光学厚度的日变化和月变化特征,并进一步分析天气条件对气溶胶光学厚度的影响。结果表明:2008年郑州地区气溶胶光学厚度与2007年持平,波长指数有所增大。气溶胶光学厚度存在明显的季节变化,春夏高,秋冬低,最低值出现在12月,郑州地区气溶胶光学厚度主要受工业烟尘影响。工作日和非工作日气溶胶光学厚度日变化趋势存在差异,交通负荷的变化可能对气溶胶光学厚度的日变化影响较大。轻雾和霾均能引起气溶胶光学厚度的显著增大,并且轻雾对气溶胶光学厚度的影响大于霾。沙尘过程中,气溶胶光学厚度急剧增大,而后逐渐下降,并逐渐恢复到正常水平,波长指数会减小。
Aerosol Optical Depth（AOD） in the Zhengzhou area is retrieved according to the Bouguer-Lamber law with the measured data from CE318 photometers in 2008.The monthly and daily variations of AOD in the Zhengzhou area are analyzed,and the effect of whether condition on AOD is studied.The results reveal：In 2008,AOD in the Zhengzhou area was at the same level with that in 2007,but the wavelength index increased.There were evident seasonal characteristics in AOD,higher in spring and summer and lower in autumn and winter,with the lowest value in December.AOD in the Zhengzhou area was mainly affected by industrial dusts.The daily variation pattern of AOD on workdays was different from that on non-workdays,with the biggest differences occurred in the morning and noon.Traffic contributed most to the differences.Thin fog and haze made AOD increase obviously,and the effect of thin fog on AOD was higher than that of haze.During the sandy/dusty weather process,AOD increased rapidly at first,then descended gradually,and returned to normal level,with a decreased aerosol wavelength index.
出处
《气象科技》
北大核心
2010年第4期515-520,共6页
Meteorological Science and Technology
基金
国家重点基金研究发展规划(973)项目(2006CB403705)资助
关键词
太阳光度计
气溶胶光学厚度
天气现象
变化规律
sun photometer
aerosol optical depth
synoptic phenomena
variation regularity
