Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090238 |
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
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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 |
URL | 查看原文 |
引用统计 | |
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 |
推荐引用方式 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). |
条目包含的文件 | 条目无相关文件。 |
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