Retrieval of columnar water vapor using multispectral radiometer measurements over northern China

Liu, Chaoshun; Li, Yun; Gao, Wei; Shi, Runhe; Bai, Kaixu

doi:doi:10.1117/1.3647483

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Journal of Applied Remote Sensing / Volume 5 / Research Papers

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Retrieval of columnar water vapor using multispectral radiometer measurements over northern China

J. Appl. Remote Sens. 5, 053558 (Oct 06, 2011); http://dx.doi.org/10.1117/1.3647483

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Abstract

References (15)

Chaoshun Liu, Wei Gao, Runhe Shi, and Kaixu Bai

Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200062, China

Joint Laboratory for Environmental Remote Sensing and Data Assimilation, ECNU & CEODE, CAS, Shanghai 200062, China

Yun Li

National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China

Colorado State University, USDA UV-B Monitoring and Research Program and Center of Remote Sensing and Modeling for Agricultural Sustainability, Fort Collins, Colorado 80521-2671

Water vapor is an important component in hydrological processes that basically involve all types of seasons, including dry (e.g., drought) or wet (e.g., hurricane or monsoon). This study retrieved columnar water vapor (CWV) with the 939.3 nm band of a multifilter rotating shadowband radiometer (MFRSR) using the modified Langley technique. Such an investigation was in concert with the use of the atmospheric transmission model MODTRAN for determining the instrument coefficients required for CWV estimation. Results of the retrieval of CWV by MFRSR from September 23, 2004 to June 20, 2005 at the XiangHe site are presented and analyzed in this paper. To improve the credibility, the MFRSR results were compared with those obtained from the AErosol RObotic NETwork CIMEL sun-photometer measurements, co-located at the XiangHe site, and the moderate resolution imaging spectroradiometer (MODIS) near-infrared total precipitable water product (MOD05), respectively. These comparisons show good agreement in terms of correlation coefficients, slopes, and offsets, revealing that the accuracy of CWV estimation using the MFRSR instrument is reliable and suitable for extended studies in northern China.

History

Received Jun 20, 2011
Accepted Sep 16, 2011
Revised Aug 03, 2011
Published online Oct 06, 2011

Digital Object Identifier

http://dx.doi.org/10.1117/1.3647483

Citation

Chaoshun Liu, Yun Li, Wei Gao, Runhe Shi and Kaixu Bai, "Retrieval of columnar water vapor using multispectral radiometer measurements over northern China", J. Appl. Remote Sens. 5, 053558 (Oct 06, 2011); http://dx.doi.org/10.1117/1.3647483