干旱区生态环境知识资源中心(Arid): Tropical Indo-Pacific Compounding Thermal Conditions Drive the 2019 Australian Extreme Drought

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DOI	10.1029/2020GL090323
	Tropical Indo-Pacific Compounding Thermal Conditions Drive the 2019 Australian Extreme Drought
	Zhang, Wenjun; Mao, Wei; Jiang, Feng; Stuecker, Malte F.; Jin, Fei-Fei; Qi, Li
通讯作者	Zhang, WJ (corresponding author), Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, CIC FEMD ILCEC, Minist Educ KLME, Nanjing, Peoples R China.
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2021
卷号	48 期号:2
英文摘要	Australia suffered a long-lasting extensive drought in 2019 with catastrophic wildfires creating about $4.4 billion damages, the worst record in the recent four decades. Concurrent with this extreme drought, the tropical Indo-Pacific oceans exhibited an extraordinary combination of sea surface temperature (SST) anomalies, characterized by a Central-Pacific (CP) El Nino event with westernmost location and the third strongest positive Indian Ocean Dipole (IOD) event. We here show evidence that this unique combination was responsible for the pan-Australian drought as a westward located CP El Nino event and a strong positive IOD event can exacerbate precipitation reduction in northeastern and southern Australia, respectively. These continent-wide extreme droughts could become more frequent over Australia in a warming world, considering projected increases in both CP El Nino and extreme positive IOD events superimposed on secular warming and drying trends. Plain Language Summary Australia is the driest inhabited continent in the world, 70% of which is either arid or semiarid land. During 2019, Australia was ravaged by the worst drought in decades with devastating wildfires destroying around 3,000 homes and affecting about one billion animals. The physical mechanisms driving this extreme drought remains unclear. Concurrent with this long-lasting continent-wide drought, the Indo-Pacific oceans showed pronounced sea surface temperature anomalies associated with a record westernmost-located Central Pacific (CP) El Nino event and the third strongest Indian Ocean Dipole (IOD) event co-occurring. Our observational diagnostics and numerical model experiments show that these two compounding events caused atmospheric circulation anomalies that were responsible for the extreme precipitation deficiencies over Australia. With global warming, both CP El Nino and extreme positive IOD events are projected to become more frequent, which hints to increased risk of the severe Australian droughts in the future. Key Points . Australia suffered a long-lasting extensive drought in 2019, the worst record in the recent four decades This extreme drought can be well explained by combined effects of the westernmost-located CP El Nino and third strongest positive Indian Ocean Dipole (IOD) events Severe Australian droughts could occur more frequently in a warming world with projected increases in both CP El Nino and extreme IOD events
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000613648800035
WOS关键词	INDIAN-OCEAN DIPOLE ; SEA-SURFACE TEMPERATURES ; EL-NINO ; SOUTHERN-OSCILLATION ; GLOBAL ATMOSPHERE ; WINTER RAINFALL ; ENSO ; PREDICTABILITY ; VARIABILITY ; EVENTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347934
作者单位	[Zhang, Wenjun; Mao, Wei; Jiang, Feng; Qi, Li] Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, CIC FEMD ILCEC, Minist Educ KLME, Nanjing, Peoples R China; [Stuecker, Malte F.] Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Oceanog, Honolulu, HI 96822 USA; [Stuecker, Malte F.] Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr IPRC, Honolulu, HI 96822 USA; [Jin, Fei-Fei] Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Atmospher Sci, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Zhang, Wenjun,Mao, Wei,Jiang, Feng,et al. Tropical Indo-Pacific Compounding Thermal Conditions Drive the 2019 Australian Extreme Drought[J]. 南京信息工程大学,2021,48(2).
APA	Zhang, Wenjun,Mao, Wei,Jiang, Feng,Stuecker, Malte F.,Jin, Fei-Fei,&Qi, Li.(2021).Tropical Indo-Pacific Compounding Thermal Conditions Drive the 2019 Australian Extreme Drought.GEOPHYSICAL RESEARCH LETTERS,48(2).
MLA	Zhang, Wenjun,et al."Tropical Indo-Pacific Compounding Thermal Conditions Drive the 2019 Australian Extreme Drought".GEOPHYSICAL RESEARCH LETTERS 48.2(2021).