Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079593 |
Reconciling Hadley Cell Expansion Trend Estimates in Reanalyses | |
Davis, N. A.; Davis, S. M. | |
2018-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:20页码:11439-11446 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Numerous studies have concluded that historical Hadley cell expansion simulated in reanalyses is much larger than the future expansion predicted by climate model simulations. Is Hadley cell expansion too weak in climate models, or are the trends in reanalyses spuriously large? This study shows that the mean meridional circulation in reanalyses generally does not conserve mass. The mass imbalance projects onto trends in the Hadley cell edge latitudes by modifying both the mean and anomalous circulation. In correcting for the imbalance, the majority of Hadley cell expansion trends in early-generation reanalyses in both hemispheres are revised to be smaller in magnitude, bringing them into closer agreement with the trends in modern reanalyses and climate models. While the methodology presented here is statistical in nature, it produces quantitatively similar results to a more sophisticated mass budget correction method. Plain Language Summary Reanalyses are weather forecast models that use observations to constrain hindcasts of the past evolution of Earth's atmosphere. They are one tool used to study the Hadley cells, two large circulation cells in the tropics with far-reaching impacts on Earth's climate. The amount the Hadley cells expanded in older reanalysis products was much larger than what was simulated in climate models. However, some of this expansion is due to the violation of a basic physical law. When this is corrected, the expansion in older reanalyses is closer to the expansion in more modern reanalyses. It is possible that some of the supposed discrepancy between models and reanalyses was due to these sorts of problems in the older reanalyses. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451510500073 |
WOS关键词 | TROPICAL BELT ; POLEWARD EXPANSION ; CIRCULATION ; WIDTH ; CONSERVATION ; VARIABILITY ; CMIP5 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27047 |
专题 | 气候变化 |
作者单位 | Univ Colorado, CIRES, NOAA, ESRL,Chem Sci Div, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Davis, N. A.,Davis, S. M.. Reconciling Hadley Cell Expansion Trend Estimates in Reanalyses[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(20):11439-11446. |
APA | Davis, N. A.,&Davis, S. M..(2018).Reconciling Hadley Cell Expansion Trend Estimates in Reanalyses.GEOPHYSICAL RESEARCH LETTERS,45(20),11439-11446. |
MLA | Davis, N. A.,et al."Reconciling Hadley Cell Expansion Trend Estimates in Reanalyses".GEOPHYSICAL RESEARCH LETTERS 45.20(2018):11439-11446. |
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