DEVELOPMENT AND APPLICATION OF A COUPLED ATMOSPHERE AND LAND DATA ASSIMILATION USING SATELLITE KA-BAND MICROWAVE OBSERVATION

• SETO Rie

  東京工業大学 環境・社会理工学院

Bibliographic Information

Other Title

• Ka-band衛星マイクロ波による大気陸面結合データ同化の開発と平成30年7月豪雨への適用

Abstract

 Operational weather forecasting centers in the world are vigorously trying to utilize cloud and rain signals within satellite microwave observation for improving weather prediction. However, there is still no established technique that is effective over land where the background radiation is strong. This study developed a coupled atmosphere and land data assimilation method to fully utilize Ka-band microwave (KaMW) including relatively weak cloud signal for local-scale rainfall prediction. Results of its application to a heavy rain event showed that assimilation of KaMW predicted more appropriate rainfall amount than that of high-frequency microwave (HiMW), which contains large ice signal, while the method with HiMW more effectively predicted rainfall area. This indicates a large impact of KaMW on rainfall prediction and enables reducing the information requirements for cloud estimation over land and using HiMW for more detailed estimation and prediction of cloud and rain in the future.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 77 (2), I_1345-I_1350, 2021

  Japan Society of Civil Engineers

Keywords

• Ka-band satellite-based passive microwave observation
• coupled land and atmosphere assimilation
• local-scale heavy rain prediction

Details

• CRID: 1390291115030320640
• NII Article ID: 130008159991
• DOI: 10.2208/jscejhe.77.2_i_1345
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/77/2/77_I_1345/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed