Characteristic precipitation patterns of El Niño/La Niña in time-variable gravity fields by GRACE

Morishita, Yu; Heki, Kosuke

Characteristic precipitation patterns of El Niño/La Niña in time-variable gravity fields by GRACE

Morishita, Yu; Heki, Kosuke

Earth and Planetary Science Letters, 2008, 272(3-4), 677-682

Permalink : https://hdl.handle.net/2115/34505

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/34505
タイトル	Characteristic precipitation patterns of El Niño/La Niña in time-variable gravity fields by GRACE
著者	著者名 Morishita, Yu
著者	e-Rad_Researcher 30280564 著者名 Heki, Kosuke
言語	英語
キーワード	El Niño
	La Niña
	GRACE
	terrestrial water storage
	soil moisture
発行日	2008-08-15
出版者	Elsevier
収録物名	Earth and Planetary Science Letters
巻(号)	272(3-4)
ページ	677-682
抄録	El Niño and La Niña are known to bring about characteristic patterns of anomalous precipitation in various regions of the world. We extracted temporary and regional gravity changes from monthly gravity fields recovered by the GRACE satellites, and converted them to the changes in surface mass, possibly ground or subsurface water in land area. Such mass changes in the 2006-2007 El Niño and 2005-2006 La Niña episodes agreed well with precipitation anomaly patterns inferred from meteorological records in tens of past such episodes. We further compared them with anomalies of soil moisture numerically simulated by integrating monthly precipitation and evapotranspiration. They agree quantitatively with the GRACE data, suggesting that temporal changes in terrestrial water storage in low-latitude region are largely governed by precipitation. This study demonstrates the potential of satellite gravimetry as a sensor of inter-annual climate changes.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0012-821X
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.epsl.2008.06.003