GSTDTAP  > 气候变化
DOI10.1029/2020GL090238
Local and Remote Drivers of Southeast Australian Drought
C. M. Holgate; A. I. J. M. van Dijk; J. P. Evans; A. J. Pitman
2020-09-09
发表期刊Geophysical Research Letters
出版年2020
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 focusses 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.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/294015
专题气候变化
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GB/T 7714
C. M. Holgate,A. I. J. M. van Dijk,J. P. Evans,et al. Local and Remote Drivers of Southeast Australian Drought[J]. Geophysical Research Letters,2020.
APA C. M. Holgate,A. I. J. M. van Dijk,J. P. Evans,&A. J. Pitman.(2020).Local and Remote Drivers of Southeast Australian Drought.Geophysical Research Letters.
MLA C. M. Holgate,et al."Local and Remote Drivers of Southeast Australian Drought".Geophysical Research Letters (2020).
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