摘要
目前,大气气溶胶光学厚度探测主要有卫星遥感和陆基探测两种手段,其中陆基太阳光度计探测气溶胶光学厚度是目前气溶胶遥感手段中最准确的方法,常用来验证卫星气溶胶光学厚度遥感的结果。而卫星遥感气溶胶光学厚度我们常选取MODIS气溶胶产品进行研究,MODIS气溶胶反演算法是美国NASA基于一定气溶胶模型建立的,但这种模型在我国的气溶胶反演中是否具有准确性,是需要进一步研究的。而对于研究区域的考虑,我们选取我国AERONET站点(全球气溶胶自动观测网)最密集的台湾地区进行研究,利用台湾地区四个AERONET站点的地基太阳光度计测得的气溶胶光学厚度和MODIS气溶胶产品的光学厚度进行对比、验证。主要通过:(1)对MODIS与光度计观测的气溶胶光学厚度分布规律进行对比分析;(2)对处理后的MODIS与光度计观测的气溶胶光学厚度结果进行线性回归分析。旨在通过分析了解两种探测手段的差异,为气溶胶相关研究提供一定的参考价值。
Currently,there are mainly two methods to detect atmospheric aerosol optical depth,namely satellite remote sensing and ground-based detection,of which detecting the aerosol optical depth via ground-based sun photometers is the most accurate among aerosol remote sensing methods,and it is often utilized to verify the results of satellite remote sensing aerosol optical depth.We usually select MODIS aerosol products to study the satellite remote sensing aerosol optical depth.MODIS aerosol retrieval algorithm is set up by NASA based on a certain aerosol model.However,it needs to be further studied whether this kind of model is accurate in the aerosol retrieval in China.In consideration of the study area,we select Taiwan province,where it has the most intensive AERONET sites（Aerosol Robotic Network）in China,to conduct the study,and utilize the aerosol optical depth detected by the ground-based sun photometers and the optical depth of the MODIS aerosol products in the four AERONET sites in Taiwan for comparison and verification.The study is conducted mainlyby contrastive analysis of the distribution rules of aerosol optical depth detected by MODIS and the photometers respectively and by analyzing linear regression of the results in terms of the aerosol optical depth detected by MODIS and the photometers respectively.This study aims at providing reference for the research related to aerosol by analyzing and understanding the differences between the two detecting methods.
出处
《气象水文海洋仪器》
2016年第1期37-45,共9页
Meteorological,Hydrological and Marine Instruments
