摘要
使用2000—2018年的MODIS MOD04_3K气溶胶标准产品对江西省气溶胶光学厚度(AOD)进行提取。通过合成年均值、月均值和季均值AOD数据,分析550 nm处气溶胶光学厚度的时空变化特征。结果表明:2006年与2014年为两个波峰,南昌市、宜春市等人为活动频繁的中北部地区AOD值偏高,省边缘及南部AOD值较低。利用19年各月数据合成月均值AOD,发现AOD值从3月开始增大,5月达到最大值,在7—8月AOD值减小,直至12月达到最小。AOD值季节差异较大,随春夏秋冬四季依次降低。研究影响因子时,发现高程和降水量与AOD值成反比,人口密度与AOD值成正比,土地利用类型中的林地地区AOD值在0.5以下,而耕地地区与居民区的AOD值较高。
This paper uses MODIS MOD04_3K aerosol products from 2000 to 2018 to extract aerosol optical thickness(AOD)in Jiangxi Province.By synthesizing annual average,monthly average and quarterly average AOD data,the spatial and temporal distribution of aerosol optical thickness at 550nm was analyzed.The results show that there are two peaks in 2006 and 2014.The AOD values of the central and northern with frequent human activities such as Nanchang City and Yichun City are relatively high,while the border area and the southern part have lower AOD values.According to the monthly average AOD synthesized based on the monthly data in 19 years,the AOD value has increased since March,reaches the maximum in May,and the AOD value decreases from July to August until it reaches the minimum in December.The AOD seasonal value varies greatly,decreasing from spring to winter.When studying the affecting factors,it was found that elevation and precipitation are inversely proportional to the AOD value.The population density is directly proportional to the AOD value.The AOD value of forested area is below 0.5,while the cultivated areas and residential areas are higher.
作者
艾云婵
况润元
AI Yunchan;KUANG Runyuan(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《江西理工大学学报》
CAS
2021年第1期22-29,共8页
Journal of Jiangxi University of Science and Technology
基金
江西省教育厅科学技术研究项目(GJJ160617)。
关键词
MODIS
气溶胶光学厚度(AOD)
时空分布
影响因子
MODIS
aerosol optical thickness(AOD)
spatial and temporal distribution
the affecting factors