陆地气溶胶粒子尺度分布的准确描述

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摘要利用AERONET 2.0级数据研究了3种主要陆地气溶胶（吸收性，中性和非吸收性）粒子尺度分布的规律.结果表明：当气溶胶的主要成分为小粒子时，细模式气溶胶的中值半径（r_f）和气溶胶总光学厚度（τ_t）的相关性较好，但粗模式的中值半径（r_c）与τ_t相关性较差，且对中性气溶胶表现为负相关，对其他两种类型则表现为正相关；在细模式气溶胶占比减少时，r_f和r_c与τ_t的相关性均减小；不论在何种情况下，r_f与细模式气溶胶光学厚度（τ_f），以及r_c与粗模式气溶胶光学厚度（τ_c）总保持很高的相关性，且不论哪种气溶胶类型，r_c与τ_c总表示出稳定的负相关.最后讨论了新的气溶胶粒子尺度描述方法对卫星气溶胶性质反演的影响.

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	王家成
	崔生成
	朱勇

关键词 ：气溶胶, AERONET, 气溶胶粒子尺度分布, 气溶胶模型

Abstract：The size distributions of three main land aerosols (absorbing, neutral and no-absorbing) were analyzed based on aerosol robotic network (AERONET) level 2.0 data. The problems existing in the current descriptions for land aerosol size distributions were pointed out and the more accurate descriptions were proposed. The results showed when aerosol was dominated by fine particles, the relationship between fine mode radius (r_f) and total aerosol optical depth (τ_t) exhibited high correlation, however coarse mode radius (r_c) and τ_t didn't display such good correlation, and the relationship didn't always exhibit positive correlation, they could also exhibit negative correlation for different aerosol types. When fine mode fraction was low, neither r_f and τ_t nor r_c and τ_t exhibited high correlation. r_f and fine mode aerosol optical depth (τ_f) (or r_c and coarse mode aerosol optical depth (τ_c)) always displayed robust correlation with high coefficients, and different from the relationship between r_c and τ_t which can exhibit positive or negative correlation, r_c and τ_c always exhibited robust negative correlation. Finally, the influences of using the new description in satellite aerosol retrieval were discussed.

Key words： aerosols AERONET aerosol size distribution aerosol modal

收稿日期: 2019-05-27

PACS:	X511
	TP79
	P407

基金资助:中国科学院战略性先导技术专项（A类）（XDA17010104）；国家重点研发计划（2017YFC0209801）；安徽省高校自然科学研究重点项目（KJ2019A0537）

通讯作者: 王家成,教授,xiacuiw@163.com E-mail: xiacuiw@163.com

作者简介: 王家成(1968-),男,安徽阜阳人,教授,博士,主要从事大气遥感方面的研究.发表论文20余篇.

引用本文:

王家成, 崔生成, 朱勇. 陆地气溶胶粒子尺度分布的准确描述[J]. 中国环境科学, 2019, 39(11): 4538-4545. WANG Jia-cheng, CUI Sheng-cheng, ZHU Yong. The more accurate descriptions of land aerosol size distribution. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4538-4545.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I11/4538

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