Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089866 |
Hydrological cycle changes explain weak Snowball Earth storm track despite increased surface baroclinicity | |
T. A. Shaw; R. J. Graham | |
2020-10-09 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Simulations show storm tracks were weaker during past cold, icy climates relative to the modern climate despite increased surface baroclinicity. Previous work explained the weak North Atlantic storm track during the Last Glacial Maximum using dry zonally‐asymmetric mechanisms associated with orographic forcing. Here we show zonally‐symmetric mechanisms associated with the hydrological cycle explain the weak Snowball Earth storm track. The weak storm track is consistent with the decreased meridional gradient of evaporation and atmospheric shortwave absorption and can be predicted following global‐mean cooling and the Clausius‐Clapeyron relation. The weak storm track is also consistent with decreased latent heat release aloft in the tropics, which decreases upper‐tropospheric baroclinicity and Mean Available Potential Energy. Overall, both hydrological cycle mechanisms are reflected in the significant correlation between storm track intensity and the meridional surface moist static energy gradient across a range of simulated climates between modern and Snowball Earth. |
领域 | 气候变化 |
URL | 查看原文 |
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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/297888 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | T. A. Shaw,R. J. Graham. Hydrological cycle changes explain weak Snowball Earth storm track despite increased surface baroclinicity[J]. Geophysical Research Letters,2020. |
APA | T. A. Shaw,&R. J. Graham.(2020).Hydrological cycle changes explain weak Snowball Earth storm track despite increased surface baroclinicity.Geophysical Research Letters. |
MLA | T. A. Shaw,et al."Hydrological cycle changes explain weak Snowball Earth storm track despite increased surface baroclinicity".Geophysical Research Letters (2020). |
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