Aerosol optical depth retrieval over land using MODIS data and its application in detection of dust event

Author

Mei, Linlu ; Xue, Yong ; Guang, Jie ; Li, Yingjie ; Wang, Ying ; Xu, Hui ; Ai, Jianwen

Author_Institution

Inst. of Remote Sensing Applic., State Key Lab. of Remote Sensing Sci., Chinese Acad. of Sci., Beijing, China

fYear

2010

fDate

25-30 July 2010

Firstpage

1129

Lastpage

1132

Abstract

Aerosol optical depth (AOD) is a significant indicator of dust episode. However, AOD retrieval over land still remains a difficult task because the measured signal is a composite of reflectance of sunlight by the variable surface covers and back scattering by the semitransparent aerosol layer. In this paper, an approach using bi-angle with Moderate Resolution Imaging Spectroradiometer (MODIS) data was presented. The derived AOD is compared to AERONET observations in the Washington State area and a retrieval error within 18% is found. Moreover, a dust episode in Washington State on October 4, 2009 was presented; we have analyzed the advection and dispersion of this event to get the possible source areas for the episode and its influence in the next day under the meteorological conditions.

Keywords

aerosols; atmospheric optics; atmospheric techniques; dust; remote sensing; AD 2009 10 04; AOD retrieval; MODIS data; Moderate Resolution Imaging Spectroradiometer; USA; Washington state; aerosol optical depth; backscattering; biangle approach; dust event detection; semitransparent aerosol layer; sunlight reflectance; variable surface cover; Aerosols; Land surface; MODIS; Optical imaging; Optical reflection; Optical sensors; Remote sensing; Aerosol Optical Depth (AOD); Dust episode; MODIS;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International

Conference_Location

Honolulu, HI

ISSN

2153-6996

Print_ISBN

978-1-4244-9565-8

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2010.5653216

Filename

5653216