globalchange  > 气候变化事实与影响
Scopus ID: 2-s2.0-85047666917
Regional meridional cells governing the interannual variability of the Hadley circulation in boreal winter
Author: Sun Y.; Li L.Z.X.; Ramstein G.; Zhou T.; Tan N.; Kageyama M.; Wang S.
Source Publication: Climate Dynamics
ISSN: 9307575
Publishing Year: 2019
Volume: 52, Issue:2019-01-02
pages begin: 831
pages end: 853
Language: 英语
Keyword: CMIP5 model ; ENSO ; Extent ; Global monsoon ; Hadley circulation ; Interannual variability ; Jet ; Mid-latitude eddies ; Reanalysis ; Strength
English Abstract: The Hadley circulation (HC) has conventionally been considered as thermally direct with uniform zonal distribution. However, the meridional circulation in the tropics is far from uniform, including the thermally direct cells associated with the global monsoon heating and indirect cells in the absence of diabatic heating. This study aims at assessing the thermally direct and indirect cells in different regions, identifying the geographic sectors responsible for interannual variability of HC strength and boundaries, and unraveling the underlying mechanism for the interannual variability of HC edges and intensity. Results derived from ERA-Interim reanalysis and climate models show that the climatological HC in wintertime (December–January–February) obscures longitudinal diversity of regional meridional cells (RMC), including thermally direct RMCs over Eurasia and the Eastern Pacific, thermally direct southern limbs of RMCs over the Central Pacific and Western Atlantic with opposite circulation. For each of the regions, El Niño-South Oscillation and mid-latitude eddies are assessed in terms of their relative contributions to the interannual variability of HC intensity and extent. Their underneath physical mechanisms are thoroughly investigated. © 2018, The Author(s).
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Laboratoire des Sciences du Climat et de l’Environnement/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Laboratoire de Météorologie Dynamique, CNRS, Sorbonne Université, Paris, France; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany

Recommended Citation:
Sun Y.,Li L.Z.X.,Ramstein G.,et al. Regional meridional cells governing the interannual variability of the Hadley circulation in boreal winter[J]. Climate Dynamics,2019-01-01,52(2019-01-02)
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