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DOI | 10.1038/s41561-019-0383-x |
Opposite tropical circulation trends in climate models and in reanalyses | |
Chemke, Rei1; Polvani, Lorenzo M.1,2,3 | |
2019-07-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:7页码:528-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Hadley circulation has large climate impacts at low latitudes by transferring heat and moisture between the tropics and subtropics. Climate projections show a robust weakening of the Northern Hemisphere Hadley circulation by the end of the twenty-first century. Over the past several decades, however, atmospheric reanalyses indicate a strengthening of the Hadley circulation. Here we show that the strengthening of the circulation in the Northern Hemisphere is not seen in climate models; instead, these models simulate a weakening of the circulation in the past 40 years. Using observations and a large ensemble of model simulations we elucidate this discrepancy between climate models and reanalyses, and show that it does not stem from internal climate variability or biases in climate models, but appears related to artefacts in the representation of latent heating in the reanalyses. Our results highlight the role of anthropogenic emissions in the recent slowdown of the atmospheric circulation, which is projected to continue in coming decades, and question the reliability of reanalyses for estimating trends in the Hadley circulation. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000473104300009 |
WOS关键词 | HADLEY CIRCULATION ; VARIABILITY ; PACIFIC ; CMIP5 ; CO2 ; STRENGTH ; CELL |
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/184804 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 2.Columbia Univ, Dept Earth & Environm Sci, Palisades, NY USA; 3.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA |
推荐引用方式 GB/T 7714 | Chemke, Rei,Polvani, Lorenzo M.. Opposite tropical circulation trends in climate models and in reanalyses[J]. NATURE GEOSCIENCE,2019,12(7):528-+. |
APA | Chemke, Rei,&Polvani, Lorenzo M..(2019).Opposite tropical circulation trends in climate models and in reanalyses.NATURE GEOSCIENCE,12(7),528-+. |
MLA | Chemke, Rei,et al."Opposite tropical circulation trends in climate models and in reanalyses".NATURE GEOSCIENCE 12.7(2019):528-+. |
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