印度沿海气溶胶光学深度的年际变化:与天气气象学的关系

A. Saha, K. Moorthy, K. Niranjan
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引用次数: 29

摘要

利用1996-2001年干旱冬季(1 - 3月)印度半岛不同地点陆基多波长太阳辐射计获取的数据,研究了光谱气溶胶光学深度(AOD)的年际变化。所有台站都显示出显著的年际变化,尽管年际变化的空间格局有所不同。这些年际变化明显受到热带辐合带南移程度的影响。过渡带南移较小的年份(即冬季过渡带靠近赤道的年份)的aod值高于过渡带南移较远的年份。发现空间变化受印度半岛、阿拉伯海、印度洋和孟加拉湾上空的气团大尺度垂直下降的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interannual variations of aerosol optical depth over coastal India : Relation to synoptic meteorology
Abstract Interannual variations in spectral aerosol optical depths (AOD) were examined using the data obtained from a chain of ground-based multiwavelength solar radiometers from various locations of the Indian peninsula during the dry winter season (January–March) of 1996–2001. All of the stations revealed significant interannual variations, even though the spatial pattern of the variations differed over the years. These interannual variations were found to be significantly influenced by the extent of the southward excursion of the intertropical convergence zone (ITCZ). The years in which the southward excursion of the ITCZ was less (i.e., the years when the wintertime ITCZ was closer to the equator) showed higher AODs than the years in which the ITCZ moved far southward. The spatial variation was found to be influenced by large-scale vertical descent of an air mass over peninsular India, the Arabian Sea, the Indian Ocean, and the Bay of Bengal.
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