基于MODIS数据的西北地区气溶胶光学厚度和Angström波长指数的研究

大气与环境光学学报 ›› 2017, Vol. 12 ›› Issue (5): 321-331.

• 大气光学 • 下一篇

基于MODIS数据的西北地区气溶胶光学厚度和Angström波长指数的研究

赵仕伟1,2,3，高晓清1,2*

（1 中国科学院寒旱区陆面过程与气候变化重点实验室，甘肃兰州 730000；
2 中国科学院西北生态环境资源研究院，甘肃兰州 730000；
3 中国科学院大学，北京 100049）

收稿日期:2017-03-01 修回日期:2017-04-11 出版日期:2017-09-28 发布日期:2017-09-21
通讯作者: 高晓清（1966-），男，研究员，博士生导师，主要从事短期气候预测及地气相互作用等方面的研究。 E-mail:xqgao@lzb.ac.cn
作者简介:赵仕伟（1982-），男，黑龙江大庆人，博士研究生，工程师，主要从事气溶胶气候效应方面的研究。
基金资助:
Supported by Major Program Supported by National Science Foundation of China(国家自然科学基金委重大专项培育项目, 91437108), Northwest Institute of Eco-Environment and Resources of the Chinese Academy of Sciences Funds for Distinguished Young Scholar(中国科学院西北生态环境资源研究院青年基金, 51Y651L01)

Study of Aerosol Optical Depth and Angström Exponent in the Northwest of China Based on MODIS Product

ZHAO Shiwei1,2,3, GAO Xiaoqing1,2*

(1. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions of Chinese Academy of Sciences, Lanzhou 730000, China;
2. Northwest Institute of Eco-Environment and Resources of Chinese Academy of Sciences, Lanzhou 730000, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China)

Received:2017-03-01 Revised:2017-04-11 Published:2017-09-28 Online:2017-09-21
Supported by:
Supported by Major Program Supported by National Science Foundation of China(国家自然科学基金委重大专项培育项目, 91437108), Northwest Institute of Eco-Environment and Resources of the Chinese Academy of Sciences Funds for Distinguished Young Scholar(中国科学院西北生态环境资源研究院青年基金, 51Y651L01)

摘要/Abstract

摘要：

利用MODIS C6产品分析2006～2015年西北地区气溶胶光学厚度(aerosol optical depth, AOD)与Angström波长指数的时空分布特征及相互关系。结果表明：塔克拉玛干沙漠和陕西关中地区为气溶胶光学厚度高值区，青海和甘肃南部为AOD低值区，西北地区东部为Angström波长指数高值区，北疆地区Angström波长指数空间分布差异较大；西北地区年均AOD为0.208±0.011，年均Angström波长指数为1.185±0.025，2010～2015年AOD呈下降趋势，2008～2015年Angström波长指数呈上升趋势。AOD与Angström波长指数存在相反的季节变化关系，AOD春季最大，秋季最小，Angström波长指数与之相反。AOD月均最大值出现在4月，为0.35±0.038，10月份最小，为0.13±0.009，Angström波长指数12月份最大，为1.34±0.035，4月份最小，为0.97±0.054； AOD与Angström波长指数呈负相关，春季的相关性最大，为-0.77，冬季的相关性最小，为-0.28。对不同季节气溶胶光学厚度与Angstrom波长指数的相关性进行分析，结果说明西北地区全年粗、细粒径气溶胶粒子都占有一定比例，主要以小粒径的烟雾粒子为主，沙尘气溶胶粒子也占有一定比例，人为气溶胶排放从春季到冬季不断上升。

关键词: MODIS, 气溶胶光学厚度, Angström波长指数, 时空特征, 相关性分析, 西北地区

Abstract:

Analysis of spatio-temporal characteristics and correlations between aerosol optical depth (AOD) and Angström exponent over northwest was analyzed based on MODIS C6 product from 2006 to 2015. The results showed that the high AOD occurred in the area of Southern Xinjiang and Guanzhong region of Shaanxi Province, the south of Qinghai and Gansu Province existed low value. High Angström exponent occurred in the east of the northwest, and spatial distribution was quite different in the north of Xinjiang. The annual mean AOD was 0.208±0.011, Angström exponent was 1.185±0.025. AOD showed a downward trend during 2010 to 2015, and Angström exponent was on the rise during 2008 to 2015. AOD and Angström exponent were opposite to the seasonal changes, the largest AOD was in spring, the smallest in autumn, just the reverse to Angström exponent. The monthly mean AOD appeared in April, which was 0.35 ± 0. 038, the smallest in October was 0.13 ± 0.009, Angström exponent was the largest in December, which was 1.34 ± 0.35, the lowest in April was 0.97 ± 0.054; AOD and Angström exponent had negative correlation, the highest correlation in spring, which was -0.77, the lowest correlation in winter, which was -0.28. The correlation between AOD and Angstrom wavelength index ind different seasons was analyzed, the results indicated that coarse and fine particle size aerosol particles occupied a certain proportion, mainly in small particle size of the smoke particles, dust aerosol particles also occupy a certain proportion. Aerosol emission was increased from spring to winter.

Key words: MODIS, aerosol optical depth, Angstr?m exponent, spatio-temporal characteristics, correlation analysis, northwestern China

中图分类号:

X513

赵仕伟高晓清. 基于MODIS数据的西北地区气溶胶光学厚度和Angström波长指数的研究[J]. 大气与环境光学学报, 2017, 12(5): 321-331.

ZHAO Shi-Wei, GAO Xiao-Qing. Study of Aerosol Optical Depth and Angström Exponent in the Northwest of China Based on MODIS Product[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(5): 321-331.

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基于MODIS数据的西北地区气溶胶光学厚度和Angström波长指数的研究

Study of Aerosol Optical Depth and Angström Exponent in the Northwest of China Based on MODIS Product

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