气候变化领域集成服务门户(CCPortal): Near-surface salinity reveals the oceanic sources of moisture for australian precipitation through atmospheric moisture transport

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DOI	10.1175/JCLI-D-19-0579.1
	Near-surface salinity reveals the oceanic sources of moisture for australian precipitation through atmospheric moisture transport
	RATHORE S.; BINDOFF N.L.; UMMENHOFER C.C.; PHILLIPS H.E.; FENG M.
发表日期	2020
ISSN	0894-8755
起始页码	6707
结束页码	6730
卷号	33 期号:15
英文摘要	The long-term trend of sea surface salinity (SSS) reveals an intensification of the global hydrological cycle due to human-induced climate change. This study demonstrates that SSS variability can also be used as a measure of terrestrial precipitation on interseasonal to interannual time scales, and to locate the source of moisture. Seasonal composites during El Niño-Southern Oscillation/Indian Ocean dipole (ENSO/IOD) events are used to understand the variations of moisture transport and precipitation over Australia, and their association with SSS variability. As ENSO/IOD events evolve, patterns of positive or negative SSS anomaly emerge in the Indo-Pacific warm pool region and are accompanied by atmospheric moisture transport anomalies toward Australia. During co-occurring La Niña and negative IOD events, salty anomalies around the Maritime Continent (north of Australia) indicate freshwater export and are associated with a significant moisture transport that converges over Australia to create anomalous wet conditions. In contrast, during cooccurring El Niño and positive IOD events, a moisture transport divergence anomaly over Australia results in anomalous dry conditions. The relationship between SSS and atmospheric moisture transport also holds for pure ENSO/IOD events but varies in magnitude and spatial pattern. The significant pattern correlation between the moisture flux divergence and SSS anomaly during the ENSO/IOD events highlights the associated ocean-atmosphere coupling. A case study of the extreme hydroclimatic events of Australia (e.g., the 2010/11 Brisbane flood) demonstrates that the changes in SSS occur before the peak of ENSO/IOD events. This raises the prospect that tracking of SSS variability could aid the prediction of Australian rainfall. © 2020 American Meteorological Society.
英文关键词	Atmospheric movements; Atmospheric pressure; Climate change; Surface waters; Atmospheric moisture; Australian rainfall; Hydrological cycles; Interannual time scale; Pacific warm pool regions; Sea surface salinity; Significant patterns; Southern oscillation; Moisture; atmosphere-ocean coupling; atmospheric transport; climate change; El Nino-Southern Oscillation; extreme event; hydrological cycle; Indian Ocean Dipole; La Nina; moisture flux; moisture transfer; precipitation quality; rainfall; sea surface salinity; Australia
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171238
作者单位	Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; ARC Centre of Excellence for Climate System Science, Hobart, TAS, Australia; CSIRO Oceans and Atmosphere and Australian Antarctic Program Partnership, Hobart, TAS, Australia; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia; CSIRO Oceans and Atmosphere, Indian Ocean Marine Research Centre, Crawley, WA, United States; Centre for Southern Hemisphere Oceans Research, CSIRO, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	RATHORE S.,BINDOFF N.L.,UMMENHOFER C.C.,et al. Near-surface salinity reveals the oceanic sources of moisture for australian precipitation through atmospheric moisture transport[J],2020,33(15).
APA	RATHORE S.,BINDOFF N.L.,UMMENHOFER C.C.,PHILLIPS H.E.,&FENG M..(2020).Near-surface salinity reveals the oceanic sources of moisture for australian precipitation through atmospheric moisture transport.Journal of Climate,33(15).
MLA	RATHORE S.,et al."Near-surface salinity reveals the oceanic sources of moisture for australian precipitation through atmospheric moisture transport".Journal of Climate 33.15(2020).