Advantage of 30-s-Updating Numerical Weather Prediction With a Phased-Array Weather Radar Over Operational Nowcast for a Convective Precipitation System

Honda, T.; Amemiya, A.; Otsuka, S.; Taylor, J.; Maejima, Y.; Nishizawa, S.; Yamaura, T.; Sueki, K.; Tomita, H.; Miyoshi, T.

Advantage of 30-s-Updating Numerical Weather Prediction With a Phased-Array Weather Radar Over Operational Nowcast for a Convective Precipitation System

Honda, T.; Amemiya, A.; Otsuka, S. et al.

Geophysical research letters, 2022, 49(11), e2021GL096927

Permalink : https://hdl.handle.net/2115/86475

このアイテムのアクセス数:445件（2026-01-22 19:46 集計）

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/86475
タイトル	Advantage of 30-s-Updating Numerical Weather Prediction With a Phased-Array Weather Radar Over Operational Nowcast for a Convective Precipitation System
著者	Honda, T. ; Amemiya, A. ; Otsuka, S. ; Taylor, J. ; Maejima, Y. ; Nishizawa, S. ; Yamaura, T. ; Sueki, K. ; Tomita, H. ; Miyoshi, T.
著者名 Honda, T.
著者名 Amemiya, A.
著者名 Otsuka, S.
著者名 Taylor, J.
著者名 Maejima, Y.
著者名 Nishizawa, S.
著者名 Yamaura, T.
著者名 Sueki, K.
著者名 Tomita, H.
著者名 Miyoshi, T.
言語	英語
キーワード	numerical weather prediction
	data assimilation
	rapid update
	convective precipitation
発行日	2022-06-16
出版者	American Geophysical Union
収録物名	Geophysical research letters
巻(号)	49(11)
ページ	e2021GL096927
抄録	Convective precipitation systems in the summer often cause sudden heavy precipitation and largely affect various human activities, but the rapid evolution limits our predicting capability. Phased-array weather radars (PAWRs) with a high spatiotemporal resolution are useful for observing such precipitation system. A recently developed numerical weather prediction (NWP) system assimilates PAWR observations with a 500-m mesh NWP model. It initiates 30-min extended forecasts every 30 s, much more frequently than the operational NWP and nowcasting systems. This study investigates the benefits of the 30-s-updating NWP system in a single but representative convective precipitation event in which a convective cloud developed within 10 min, and its evolution was not well predicted by operational precipitation nowcasting. The rapidly updating NWP system successfully predicts the evolution of the convective cloud. Assimilating the PAWR observations every 30 s continuously modifies the moisture and dynamical fields and improves the forecast accuracy consistently.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	0094-8276
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1029/2021GL096927