| DOI | 10.1029/2020GL090238
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| Local and Remote Drivers of Southeast Australian Drought |
| Holgate C.M.; Van Dijk A.I.J.M.; Evans J.P.; Pitman A.J.
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| 发表日期 | 2020
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| ISSN | 0094-8276
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| 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
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| 来源期刊 | Geophysical Research Letters
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| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/169745
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| 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
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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).
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| 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).
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| MLA |
Holgate C.M.,et al."Local and Remote Drivers of Southeast Australian Drought".Geophysical Research Letters 47.18(2020).
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