Regional meridional cells governing the interannual variability of the Hadley circulation in boreal winter
Regional meridional cells governing the interannual variability of the Hadley circulation in boreal winter
复制标题
控制北半球冬季哈德利环流年际变化的区域经向细胞
DOI：
10.1007/s00382-018-4263-7
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发表时间：
2018-05
期刊：
影响因子：
4.6
通讯作者：
Shaoyin Wang
中科院分区：
文献类型：
--
作者：
Yong Sun;Laurent Z X Li;Gilles Ramstein;Tianjun Zhou;Ning Tan;Masa Kageyama;Shaoyin Wang
哈德利环流(HC)通常被认为是具有均匀纬向分布的热直接环流。然而，热带地区的经向环流很不均匀，包括与全球季风加热有关的热直接环流和没有非绝热加热的间接环流。本研究的目的是评估不同地区的热直接环流和间接环流，找出造成环流强度和边界年际变化的地理部门，并揭示环流边缘和环流强度年际变化的潜在机制。ERA中期再分析和气候模式的结果表明，冬季(12-1-2月)的气候学HC掩盖了区域子午线单元(RMC)的纵向多样性，包括欧亚大陆和东太平洋上的热直接RMC，中太平洋和西大西洋上相反环流的RMC南支。根据厄尔尼诺-南涛动和中纬度涡旋对HC强度和范围年际变化的相对贡献，对每个区域的厄尔尼诺-南涛动和中纬涡旋进行了评估。深入研究了它们背后的物理机制。
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.
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影响因子：
5.2
作者：
Jie Ma;Jianping Li
通讯作者：
Jie Ma;Jianping Li
DOI：
10.3402/tellusa.v56i3.14410
发表时间：
2004-01
期刊：
Tellus A: Dynamic Meteorology and Oceanography
影响因子：
--
作者：
Hitoshi Tanaka;N. Ishizaki;A. Kitoh
通讯作者：
Hitoshi Tanaka;N. Ishizaki;A. Kitoh
DOI：
10.1111/j.1600-0870.2004.00049.x
发表时间：
2004-05-01
影响因子：
2
作者：
Tanaka, HL;Ishizaki, N;Kitoh, A
通讯作者：
Kitoh, A
影响因子：
4.6
作者：
V. Toma;P. Webster
通讯作者：
V. Toma;P. Webster
影响因子：
8.9
作者：
H. Riehl;T. Yeh;R. Sutcliffe
通讯作者：
H. Riehl;T. Yeh;R. Sutcliffe