气候变化领域集成服务门户(CCPortal): Distinguishing Variability Regimes of Hawaiian Summer Rainfall: Quasi-Biennial and Interdecadal Oscillations

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DOI	10.1029/2020GL091260
	Distinguishing Variability Regimes of Hawaiian Summer Rainfall: Quasi-Biennial and Interdecadal Oscillations
	Luo X.; Wang B.; Frazier A.G.; Giambelluca T.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Summer precipitation in Hawai'i accounts for 40% of the annual total and provides important water sources. However, our knowledge about its variability remains limited. Here we show that statewide Hawai'i summer rainfall (HSR) variability exhibits two distinct regimes: quasi-biennial (QB, ~2 years) and interdecadal (~30–40 years). The QB variation is linked to alternating occurrences of the Western North Pacific (WNP) cyclone and anticyclone in successive years, which is modulated by the intrinsic El Niño–Southern Oscillation biennial variability and involves a positive feedback between atmospheric Rossby waves and underlying sea surface temperature (SST) anomalies. The interdecadal variation of HSR is largely modulated by the Pacific Decadal Oscillation through affecting upstream low-level humidity that affects topographic rainfall. HSR shows weak long-term drying trend during 1920–2019. This first description of the major physical drivers of summer rainfall variability provides key information for seasonal rainfall prediction in Hawai'i. ©2020. The Authors.
英文关键词	Atmospheric humidity; Atmospheric pressure; Mechanical waves; Oceanography; Storms; Surface waters; Inter-decadal variations; Pacific decadal oscillation; Sea surface temperature anomalies; Seasonal rainfall; Southern oscillation; Summer precipitation; Summer rainfall; Western North Pacific; Rain; air-sea interaction; anticyclone; decadal variation; Pacific Decadal Oscillation; precipitation intensity; quasi-biennial oscillation; relative humidity; sea surface temperature; Pacific Ocean; Pacific Ocean (North)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169333
作者单位	Department of Atmospheric Sciences and International Pacific Research Center, School of Ocean Earth Science and Technology, University of Hawai'i at Mānoa, Honolulu, HI, United States; East-West Center, Honolulu, HI, United States; Water Resources Research Center, University of Hawai'i at Mānoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Luo X.,Wang B.,Frazier A.G.,et al. Distinguishing Variability Regimes of Hawaiian Summer Rainfall: Quasi-Biennial and Interdecadal Oscillations[J],2020,47(23).
APA	Luo X.,Wang B.,Frazier A.G.,&Giambelluca T.W..(2020).Distinguishing Variability Regimes of Hawaiian Summer Rainfall: Quasi-Biennial and Interdecadal Oscillations.Geophysical Research Letters,47(23).
MLA	Luo X.,et al."Distinguishing Variability Regimes of Hawaiian Summer Rainfall: Quasi-Biennial and Interdecadal Oscillations".Geophysical Research Letters 47.23(2020).