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Advances in Meteorology
Volume 2014, Article ID 847432, 16 pages
http://dx.doi.org/10.1155/2014/847432
Research Article

Dust Identification over Arid and Semiarid Regions of Asia Using AIRS Thermal Infrared Channels

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Haidian District, Beijing 100101, China

Received 5 June 2014; Revised 10 August 2014; Accepted 12 August 2014; Published 31 August 2014

Academic Editor: Hesham El-Askary

Copyright © 2014 Hui Xu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Asia dust generated in northern China exerts significant influences on regional air quality, weather, and climate. In this study, a dust identification algorithm over arid and semiarid regions of Asia was proposed based on the thermal observations of atmospheric infrared sounder (AIRS). Firstly, a combination of the line-by-line (LBL) and discrete ordinates radiative transfer (DISORT) model was utilized to investigate the thermal infrared signatures of dust and cloud in 800–1250 cm−1 region. Secondly, six channels in the thermal infrared region were selected from AIRS to monitor dust from space, and a further sensitivity analysis for dust and cloud under different conditions was also performed. Then, the description of the detailed identification method was provided based on distinct thermal infrared signature of dust. At last, several dust events that observed in northern China between the period of 2008 and 2012 were analyzed, and the usefulness of monitoring the outbreaks of Asian dust was emphasized through the comparison with moderate resolution imaging spectroradiometer (MODIS) visible observations and cloud aerosol lidar with orthogonal polarization (CALIOP) data in this study.