Interannual variability of tropical cyclone activity and regional Hadley circulation over the Northeastern Pacific
Interannual variability of tropical cyclone activity and regional Hadley circulation over the Northeastern Pacific
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DOI：
10.1002/2015gl063318
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发表时间：
2015-04
影响因子：
5.2
通讯作者：
Gan Zhang;Zhuo Wang
中科院分区：
文献类型：
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作者：
Gan Zhang;Zhuo Wang
研究了东北太平洋区域Hadley环流(HC)和热带气旋(TC)活动的年际变化。发现NEP飓风季HC的年际变化主要受调节热带辐合区强度和经向范围的模(M1EP)支配。与厄尔尼诺-南方涛动海温指数相比，M1EP与NEP-TC活动的相关性更强。这种强烈的相关性归因于M1EP对环境条件的影响。此外，与M1EP呈反相关关系的大西洋HC的主导模式对NEP TC活动也有很大的影响。这些发现与张和王(2013)一起，强调了HC在控制TC活动的可变性以及NEP和大西洋之间的盆地间联系中的作用。因此，建议将区域HC作为模拟TC活动的基准模式的有用度量。
The interannual variability of the regional Hadley circulation (HC) and tropical cyclone (TC) activity over the Northeastern Pacific (NEP) was investigated. The interannual variability of the HC in the NEP hurricane season is found dominated by a mode (M1EP) regulating the strength and meridional extent of the Intertropical Convergence Zone. M1EP has a more robust correlation with NEP TC activity than the El Niño–Southern Oscillation sea surface temperature indices. The strong correlation is attributed to the impacts of M1EP on environmental conditions. In addition, the leading mode of the Atlantic HC, which has an anticorrelation with M1EP, also strongly impacts NEP TC activity. The findings, together with Zhang and Wang (2013), highlight the role of the HC in controlling the variability of TC activity as well as the interbasin connection between the NEP and the Atlantic. The regional HC is thus recommended as a useful metric to benchmark models in simulating TC activity.