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journal article Open Access Apr 13, 2017

Satellite radiance data assimilation for binary tropical cyclone cases over the western North Pacific

Yonghan Choi ORCID Dong‐Hyun Cha ORCID Myong‐In Lee ORCID Joowan Kim ORCID Chun‐Sil Jin ORCID Sang‐Hun Park Min‐Su Joh ORCID
Journal of Advances in Modeling Earth Systems Vol. 9 No. 2 pp. 832-853 · American Geophysical Union (AGU)
View at Publisher Save 10.1002/2016ms000826
Abstract
AbstractA total of three binary tropical cyclone (TC) cases over the Western North Pacific are selected to investigate the effects of satellite radiance data assimilation on analyses and forecasts of binary TCs. Two parallel cycling experiments with a 6 h interval are performed for each binary TC case, and the difference between the two experiments is whether satellite radiance observations are assimilated. Satellite radiance observations are assimilated using the Weather Research and Forecasting Data Assimilation (WRFDA)'s three‐dimensional variational (3D‐Var) system, which includes the observation operator, quality control procedures, and bias correction algorithm for radiance observations. On average, radiance assimilation results in slight improvements of environmental fields and track forecasts of binary TC cases, but the detailed effects vary with the case. When there is no direct interaction between binary TCs, radiance assimilation leads to better depictions of environmental fields, and finally it results in improved track forecasts. However, positive effects of radiance assimilation on track forecasts can be reduced when there exists a direct interaction between binary TCs and intensities/structures of binary TCs are not represented well. An initialization method (e.g., dynamic initialization) combined with radiance assimilation and/or more advanced DA techniques (e.g., hybrid method) can be considered to overcome these limitations.
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Details
Published
Apr 13, 2017
Vol/Issue
9(2)
Pages
832-853
License
View
Authors
Y
Yonghan Choi

School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology Ulsan Korea; National Center for Atmospheric Research Boulder Colorado USA

D
Dong‐Hyun Cha

School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology Ulsan Korea

M
Myong‐In Lee

School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology Ulsan Korea

J
Joowan Kim

Department of Atmospheric Sciences Kongju National University Gongju Korea

C
Chun‐Sil Jin

School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology Ulsan Korea; Environmental Modeling Center NOAA/NWS/NCEP College Park Maryland USA

S
Sang‐Hun Park

Department of Atmospheric Sciences, Yonsei University Seoul Korea

M
Min‐Su Joh

Korea Institute of Science and Technology Information Daejeon Korea

Funding
Korea Institute of Science and Technology Information Award: KSC‐2015‐C2‐005
Cite This Article
Yonghan Choi, Dong‐Hyun Cha, Myong‐In Lee, et al. (2017). Satellite radiance data assimilation for binary tropical cyclone cases over the western North Pacific. Journal of Advances in Modeling Earth Systems, 9(2), 832-853. https://doi.org/10.1002/2016ms000826
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