气候变化领域集成服务门户(CCPortal): Local and Remote Drivers of Southeast Australian Drought

CCPortal

DOI	10.1029/2020GL090238
	Local and Remote Drivers of Southeast Australian Drought
	Holgate C.M.; Van Dijk A.I.J.M.; Evans J.P.; Pitman A.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Droughts are associated with large-scale modes of variability, synoptic-scale systems, and terrestrial processes. Quantifying their relative roles in influencing drought guides process understanding, helps identify weaknesses in climate models, and focuses model improvements. Using a Lagrangian back-trajectory approach we provide the first quantification of the change in moisture supply during major droughts in southeast Australia, including the causes of the changes. Drought onset and intensification were driven by reduced moisture supply from the ocean, as moisture was circulated away from the region, combined with an absence of precipitation-generating mechanisms over land. During termination, strengthened moist easterly flows from the Tasman and Coral Seas promoted anomalously high rainfall. Our approach reveals terrestrial moisture sources played a secondary role, amplifying rainfall anomalies by less than 6%. Simulating droughts therefore requires deeper understanding of the relationship between moisture advection and synoptic-scale circulation and how large-scale climate variability and terrestrial processes modify these relationships. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Moisture; Rain; Australian droughts; Climate variability; Generating mechanism; Moisture advection; Process understanding; Southeast australia; Synoptic scale circulation; Synoptic-scale systems; Drought; anomaly; climate modeling; drought; easterly wave; Lagrangian analysis; moisture transfer; synoptic meteorology; Australia; Coral Sea; Pacific Ocean; Tasman Sea; Anthozoa
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/169745
作者单位	Fenner School of Environment and Society, Australian National University, Canberra, ACT, Australia; ARC Centre of Excellence for Climate System Science, UNSW, Sydney, NSW, Australia; ARC Centre of Excellence for Climate Extremes, UNSW, Sydney, NSW, Australia; Climate Change Research Centre, UNSW, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Holgate C.M.,Van Dijk A.I.J.M.,Evans J.P.,et al. Local and Remote Drivers of Southeast Australian Drought[J],2020,47(18).
APA	Holgate C.M.,Van Dijk A.I.J.M.,Evans J.P.,&Pitman A.J..(2020).Local and Remote Drivers of Southeast Australian Drought.Geophysical Research Letters,47(18).
MLA	Holgate C.M.,et al."Local and Remote Drivers of Southeast Australian Drought".Geophysical Research Letters 47.18(2020).