首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
1990~2017年中国地区气溶胶光学厚度的时空分布及其主要影响类型
摘要点击 2574  全文点击 817  投稿时间:2018-09-29  修订日期:2018-12-18
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  气溶胶光学厚度  时空分布  气溶胶类型  变化趋势分析  中国地区
英文关键词  aerosol optical depth  spatial-temporal distribution  aerosol type  trend analysis  China
作者单位E-mail
刘莹 武汉大学资源与环境科学学院, 武汉 430079 liuying157@163.com 
林爱文 武汉大学资源与环境科学学院, 武汉 430079 awlin@whu.edu.cn 
覃文敏 中国地质大学(武汉)信息工程学院, 武汉 430074  
何利杰 武汉大学资源与环境科学学院, 武汉 430079  
李霄 中国国土资源航空物探遥感中心, 北京 100083  
中文摘要
      为准确了解中国地区气溶胶光学特性,通过1990~2017年的MERRA2数据集中的气溶胶光学厚度数据,采用Man-Kendall趋势检验法和Sen's slope变化趋势分析法,从不同的时空尺度和气溶胶类型上分析中国地区AOD值的时空变化特征.结果表明:①从年际尺度上看,1990~2017年AOD年均值整体呈波动上升趋势;从季节尺度上看,月均值整体呈春夏秋依次递减,冬季有所提升的趋势,地形和气候环境是其主要影响因素.②在空间上,AOD年均值呈现东南高西北低的特征,西南部四川盆地、西北的塔里木与吐鲁番盆地等为AOD值的高值区,青藏高原地区为AOD值的低值区,同时AOD的MK值和Sen's slope值也呈现由东南向西北递减的趋势.③沙尘气溶胶和硫酸盐气溶胶影响分布具有明显的区域差异.与地形、气候变化以及人类活动强度有着密切联系.
英文摘要
      In order to accurately understand the optical characteristics of aerosols in China, based on Mann-Kendall(MK) and Sen's slope trend analysis methods, the spatiotemporal variations of aerosol optical depth(AOD) derived from MERRA-2 reanalysis datasets were estimated in China for the period of 1990-2017. The results showed that ① for the interannual scale, there was a significant increasing trend in the annual mean AOD in China during 1990-2017. Besides, high aerosol loadings were observed in spring and summer, and the seasonal difference between the eastern and western regions was large. This was mainly due to the topographic and meteorological factors. ② At the spatial scale, the annual mean AOD values increased from the northwest to the southeast, with characteristically high AOD values occurring in Sichuan Pendi and the Tarim and Turpan basins and low values in the Qinghai-Xizang plateau region. Similarly, the AOD MK value and Sen's slope value showed significant decreasing trends from the southeast to the northwest, which was closely related to climate change and the human activity intensity. ③ In regard to black carbon aerosol, dust aerosol, organic carbon aerosol, sea salt aerosol, and SO4 aerosol, dust and SO4 aerosols were affected by the air humidity and human activity intensity, which have obvious regional differences in China.

您是第51727089位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2