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A Retrieval Method Study for Aerosol Optical Thickness with MODIS Data over Hebei Province

Author: WangGuoZhou
Tutor: HuYinCui
School: Hebei Normal
Course: Cartography and Geographic Information Systems
Keywords: remote sensing Dense Dark Vegetation inversion algorithm MODIS AOT Hebei Province
CLC: X513
Type: Master's thesis
Year: 2011
Downloads: 199
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Abstract


The quantitative research of global change already have taken more and more attention by people, and satellite remote sensing technology gains universal attention by global change research workers because of its bestrow scope, quickly data updation and low cost. Atmospheric aerosols optical thickness of satellite remote sensing inversion has great significance in global atmosphere environmental monitoring. Although the atmospheric aerosols optical thickness of satellite remote sensing inversion algorithm is relatively mature, there still exist some defects in the universality and inversion precision of the algorithms.This paper heads to enhance and improve the universality purpose and inversion precision of the inversion algorithm. And with the assistance of Hebei Natural Science Fund this paper conducted a series of research work:1) Based on the in-depth analysis and research of the source, the space distribution and phase change of atmospheric aerosol in Hebei province, this paper improved the Dense Dark Vegetation Method. The improved algorithm has the following two advantages:A. Compensated the shortage of the need for the original algorithm prior assumptions of aerosol types .B. Compensated the shortage of needs for the original algorithm to determine in advance dark vegetations infrared light and red or blue segment the ratio of the deficiency of the reflectivity relationship.2) This article used the data of MODIS images for experiments received by the DVB-S receiving system in Tianjiabing Building in Hebei Normal University.3) This paper taked data collection on ground with the use of handheld sunphotometer (MICROTOPS II) .4) This paper compared the experimental results and the data of NOSA aerosol products and the actual observation data of handheld sunphotometer(MICROTOPS II).5) This paper deeply analyzed the results of the validation and found out the reasons of the part of abnormal results. The research shows that this algorithm has certain universality and relatively higher precision.This method has better applicability at atmospheric AOT remote sensing inversion in Hebei Province, and owes guiding significance and reference value for atmospheric aerosols optical thickness inversion study of Hebei Province. It proforms a high application value for the atmospheric environment monitoring in Hebei Province.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Atmospheric pollution and its control > Particulate pollutants
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