Dr. Yong Chen
Postdoctoral Fellow
Office: WWB, Rm 810
Phone: (301) 763-8211 x308
Fax: (301) 437-3296
Email:
Mailing Address:
Yong Chen
5200 Auth Rd.
Camp Springs, MD 20746
Biography

Yong Chen received his BSc in Atmospheric Sciences (1996) and MS in Atmospheric Physics & Atmospheric Environment (1999) from Peking University, P. R. China, and PhD (2005) in Atmospheric Sciences from University of California, Los Angeles. His research interests include satellite remote sensing of the Earth-Atmosphere system using wide range of the electromagnetic spectrum from visible to microwave, three dimensional radiative transfer models applied to inhomogeneous clouds and surfaces, and satellite data assimilation of hyperspectral IR radiances in numerical weather prediction models. Dr. Chen joined CIRA in 2006 as a Post-doctoral fellow to work on the JCSDA community radiative transfer model (CRTM). His main tasks are development of the CRTM for visible, infrared, and microwave under various atmospheric (clear, aerosol, and cloudy sky) and surface conditions, integrations of new radiative transfer components into CRTM, validation of CRTM using satellite observation data, and assessing the impacts of satellite radiance under clear, and cloudy conditions on numerical weather prediction systems.

Recent Work
Figure

Above: Comparision of ECMWF IASI cloud detection algorithm with current GSI cloud detection algorithm at 06 hour of 12/12/2007. From top to bottom are observation numbers, brightness temperature (BT) difference (Obs-Guess) without bias correction, BT difference with bias correction, and standard deviation for EUMETSAT IASI 300 channels. Black circles are for current GSI cloud detection, while red triangles for ECMWF cloud detection Algorithm.

The Figure shows the comparison results for IASI between the current GSI cloud detection algorithm with ECMWF cloud detection algorithm. The preliminary results show that ECMWF cloud detection algorithm assimilate more 15µm CO2 band channel data, but less data for window channels, the 6.3µm H2O band, the shortwave side of the 4.3µm CO2 band, and the shortwave, solar-affected channels. The ECMWF cloud detection algorithm is sensitive to errors in the surface skin temperature for transparent window channels. Given the more accuracy of skin surface skin temperatures, the assimilated data for window channel should be increased. The standard deviations for ECMWF cloud detection algorithm are smaller than current GSI cloud detection algorithm for most channels.

Selected Publications

Chen, Y., F. Weng, Y. Han, and Q. Liu, Validation of the Community Radiative Transfer Model (CRTM) by using CloudSat data.  J. Goephys. Res., doi:10.1029/2007JD009561, in press, (2008).

Liou, K. N., Y. Gu, W. Lee, Y. Chen, and P. Yang, Some unsolved problems in atmospheric radiative transfer: Implication on climate research in the Asia-Pacific Region. In “Recent Progress in Atmospheric Sciences: Applications to the Asia-Pacific region”, World Scientific Publishing Co., Singapore, Chapter 5, (2007).

Chen, Y., A. Hall, and K. N. Liou, Application of three-dimensional solar radiative transfer to mountains. J. Goephys. Res., 111, D21111, doi:10.1029/2006JD007163, (2006).

Chen Y., and K. N. Liou, A Monte Carlo method for 3D thermal infrared radiative transfer. J. Quant. Spectrosc. Radiat. Transfer, 101, 166 – 178, (2006).

Chen, Y., K. N. Liou, and Y. Gu, An efficient diffusion approximation for 3D radiative transfer parameterization: application to cloudy atmospheres. J. Quant. Spectrosc. Radiat. Transfer, 92, 189–200, (2005).

Ou, S.C., Y. Chen, K. N. Liou, M. Cosh, and W. Brutsaert, Satellite remote sensing of land surface temperature: Application of the atmospheric correction method and split-window technique to data of ARM-SGP site. Int. J. Rem. Sensing, 23, 5177-5192, (2002).

Yao, Z., W. Li, Y. Zhu, B. Zhao, and Y. Chen, Remote sensing of precipitation on the Tibetan Plateau using the TRMM Microwave Imager. J. Appli, Meteor., 40, 1381-1392, (2001).

Zhao, B., Z. Yao, W. Li, J. Yuan, Y. Chen, H. Gao, and Y. Zhu, Rainfall retrieval and flooding monitoring in China using TRMM Microwave Imager (TMI). Japan J. Meteor. Soc. , 79, 301-315, (2001).

Chen, Y., W. Li, Y. Zhu, and B. Zhao, Study on precipitation in Huai River basin area by SSM/I and TRMM data. Technical proceedings of the tenth international ATOVS study conference, Boulder, Colorado, 72-81, (1999).

Zhu, Y., W. Li, and Y. Chen, Study of total precipitable water by GMS-5. Chinese Quart. J. Appli. Meteor., 9, 8-14, (1998).

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