秦岭地区气溶胶光学厚度的时空演变特征及其影响因子  

Evaluation of Spatial-temporal Characteristics and Aerosol Optical Depth and Influencing Factors in Qinling Mountain Region

作　　者：孟清 白红英[1,2] 赵婷[1,2] 郭少壮[1,2] 齐贵增 MENG Qing;BAI Hongying;ZHAO Ting;GUO Shaozhuang;QI Guizeng(College of Urban and Environmental Science,Northwest University,Xi'an 710127,China;Key Laboratory of Surface System and Environmental carrying Capacity of Shaanxi Province,Northwest University,Xi'an 710127,China)

机构地区：[1]西北大学城市与环境学院,陕西 西安 710127 [2]西北大学/陕西省地表系统与环境承载力重点实验室,陕西 西安 710127

出　　处：《生态环境学报》2019年第8期1596-1603,共8页Ecology and Environmental Sciences

基　　金：国家林业公益性科研专项项目(201304309)

摘　　要：气溶胶是大气中极其重要的组成部分,它不仅影响人类的健康,还能增加大气的化学反应,导致环境温度改变。基于2002年1月-2017年12月Terra/MODIS MOD04_3 k气溶胶光学厚度(AOD)产品,通过空间分析法和空间面板模型对2002-2017年陕西秦岭地区AOD时空变化特征以及对影响秦岭山区AOD的因子权重进行排名,为气候变化研究及环境治理提供理论基础。结果表明,秦岭地区16年来AOD高值区主要集中在秦岭北坡边缘上的关中城市群、秦岭南坡边缘上的巴蜀城市群;16年间的AOD平均值为0.28。秦岭地区春(0.36)、夏(0.34)两季AOD均值明显高于秋(0.23)、冬(0.17)两季。秦岭山地16年来年均AOD小于0.3的低值区不断增加,年均AOD大于0.7的高值区不断减少。秦岭地区AOD四季演变趋势存在明显的差异性。其中春季变化平稳,轻度增加区在秦岭中部地区分布,减少区主要分布在关中和巴蜀城市群地区。夏季88.3%的地区以减少为主;冬季73%的地区以增加为主;秋季变化存在空间差异性,减少区主要分布在秦岭西南地区,增加区主要分布在东北地区,中部为基本不变区。空间面板模型结果表明,年均温度、年均风速和年均湿度对秦岭山地AOD具有显著的正向驱动作用,海拔有显著负向效应;年降水、NDVI和日照百分率对AOD均有明显的影响但均未通过显著性检验;年均气温、年均风速和海拔3个因子还具有显著的空间溢出效应。Aerosol particles are extremely important components of the atmosphere which not only affects human health but also increases atmospheric chemical reactions,leading to changes in environmental temperature.In this study,spatial and temporal characteristics of Aerosol Optical Depth(AOD)and the weights of factors affecting AOD in Qinling region of Shaanxi Province were ranked using spatial analysis method and spatial panel model,which provided a theoretical basis for climate change research and environmental governance.For this purpose,AOD retrievals at 3 km spatial resolution are obtained from the Terra Moderate Resolution Imaging Spectroradiometer(MODIS)Level 2 Collection 6.1 aerosol product(MOD04_3 k)from 2002 to 2017.This study found that:In the past 16 years,high-values of AOD are mainly distributed in the Guanzhong and Bashu urban agglomerations on the north and south slope margin of Qinling Mountains,respectively.The average AOD value in 16 years was 0.28.Average values of AOD in spring(0.36)and summer(0.34)are significantly higher than that in autumn(0.23)and winter(0.17).Low-value areas with average annual AOD less than 0.3 in the Qinling Mountains have been increasing,while the high-value areas with average annual AOD greater than 0.7 have been decreasing.There were obvious differences in the four seasons evolution trend of atmospheric aerosols in Qinling Mountains.In spring,the change was stable,the slightly increasing areas were distributed in the central Qinling Mountains,and the decreasing areas were mainly distributed in the Guanzhong and Bashu urban agglomerations.88.3%of the areas were mainly reduced in summer.73%were mainly increased in winter.There were spatial differences in autumn that the decrease areas mainly distributed in the southwest of Qinling Mountains,and the increase areas mainly distributed in the northeast,while the central region was basically unchanged.The results of the spatial panel model showed that the annual mean temperature,elevation,average wind speed and average humidity ha

关 键 词：气溶胶光学厚度 秦岭地区 时空演变 MODIS 空间面板模型 

分 类 号：X16[环境科学与工程—环境科学]