منابع مشابه
Expansion of the Hadley cell under global warming
[1] A consistent weakening and poleward expansion of the Hadley circulation is diagnosed in the climate change simulations of the IPCC AR4 project. Associated with this widening is a poleward expansion of the subtropical dry zone. Simple scaling analysis supports the notion that the poleward extent of the Hadley cell is set by the location where the thermally driven jet first becomes baroclinic...
متن کاملRecent Hadley cell expansion: The role of internal atmospheric variability in reconciling modeled and observed trends
Several studies have reported that global climate models underestimate the observed trend in tropical expansion, with the implication that such models are missing key processes of the climate system. We show here that integrations of a chemistry-climate model forced with observed sea surface temperatures (SSTs), greenhouse gases, and ozone-depleting substances can produce 1980 to 2009 expansion...
متن کاملObserved poleward expansion of the Hadley circulation since 1979
Using three meteorological reanalyses and three outgoing long-wave radiation (OLR) datasets, we show that the Hadley circulation has a significant expansion of about 2 to 4.5 degrees of latitude since 1979. The three reanalyses all indicate that the poleward expansion of the Hadley circulation in each hemisphere occurs during its summer and fall seasons. Results from the OLR datasets do not hav...
متن کاملWidth of the Hadley cell in simple and comprehensive general circulation models
[1] Thewidth of the Hadley cell is studied over a wide range of climate regimes using both simple and comprehensive atmospheric general circulation models. Aquaplanet, fixed sea surface temperature lower boundary conditions are used in both models to study the response of the Hadley cell width to changes in both global mean temperature and poleto-equator temperature gradient. The primary sensit...
متن کاملHadley circulation shrinkage in the mid-Cretaceous
H. Hasegawa, R. Tada, X. Jiang, Y. Suganuma, S. Imsamut, P. Charusiri, N. Ichinnorov, and Y. Khand Department of Earth and Planetary Science, the University of Tokyo, Tokyo, Japan Chengdu Institute of Geology and Mineral Resources, Chengdu, China National Institute of Polar Research, Tokyo, Japan Department of Mineral Resources, Bureau of Geological Survey, Bangkok, Thailand Department of Geolo...
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2020
ISSN: 1680-7324
DOI: 10.5194/acp-20-5249-2020