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Correction for Radiation Dry Bias Found in RS92 Radiosonde Data during the MISMO Field Experiment

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/64819

Title: Correction for Radiation Dry Bias Found in RS92 Radiosonde Data during the MISMO Field Experiment
Authors: Yoneyama, Kunio Browse this author
Fujita, Mikiko Browse this author
Sato, Naoki Browse this author
Fujiwara, Masatomo Browse this author →KAKEN DB
Inai, Yoichi Browse this author
Hasebe, Fumio Browse this author →KAKEN DB
Issue Date: 2008
Publisher: 日本気象学会
Journal Title: SOLA
Volume: 4
Start Page: 13
End Page: 16
Publisher DOI: 10.2151/sola.2008-004
Abstract: Atmospheric soundings using the Vaisala RS92 radiosonde were intensively conducted during the field experiment MISMO (Mirai Indian Ocean cruise for the Study of the MJO-convection Onset) in the central and eastern equatorial Indian Ocean from October to December 2006. By comparing the RS92 relative humidity data with that from the Meteolabor Snow White (SW) chilled-mirror dew/frost-point hygrometers launched on the same ship around the local noon time, the dry bias was found to increase significantly with height. In addition, it was also revealed that the dry bias had a clear diurnal variation with its maximum at local noon and near-zero at night from the comparison of precipitable water vapor (PWV) with that derived from the shipboard Global Positioning System (GPS) data. Therefore, the dry bias of the RS92 data could be attributed to a solar radiation-induced error that was recently discussed by V omel et al. (2007). In this study, we developed a correction scheme for the MISMO RS92 humidity data as a function of pressure and local time using SW data, and then confirmed its validity with GPS-derived PWV.
Type: article
URI: http://hdl.handle.net/2115/64819
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤原 正智

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