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Weak Tropical Cyclones Dominate the Poleward Migration of the Annual Mean Location of Lifetime Maximum Intensity of Northwest Pacific Tropical Cyclones since 1980

机译:自1980年以来,弱热带旋风占据了西北太平洋热带热带气旋的终身最大强度的每年平均位置的头部迁移

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The poleward migration of the annual mean location of tropical cyclone (TC) lifetime maximum intensity (LMI) has been identified in the major TC basins of the globe over the past 30 years, which is particularly robust over the western North Pacific (WNP). This study has revealed that this poleward migration consists mainly of weak TCs (with maximum sustained surface wind speed less than 33ms 21) over the WNP. Results show that the location of LMI of weak TCs has migrated about 18 latitude poleward per decade since 1980, while such a trend is considerably smaller for intense TCs. This is found to be linked to a significant decreasing trend of TC genesis in the southern WNP and a significant increasing trend in the northwesternWNP over the past 30 years. It is shown that the greater sea surface temperature (SST) warming at higher latitudes associated with global warming and its associated changes in the largescale circulation favor more TCs to form in the northern WNP and fewer but stronger TCs to form in the southern WNP.
机译:在过去的30年里,在全球主要的TC盆地中确定了热带气旋(TC)终身最大强度(LMI)的每年平均定位的偏移,这在北太平洋西部(WNP)中特别强大。该研究表明,这种钢管迁移主要由WNP上的弱TCS(最大持续的表面风速小于33ms 21)。结果表明,自1980年以来,LMI LMI的位置已经迁移了大约18个纬度极端,而这种趋势对于强烈的TCS相当小。发现这与南方南方南部TC成因的显着降低趋势有关,在过去的30年里,西北WNP的显着增加趋势。结果表明,在与全球变暖相关的高纬度地区的大海表面温度(SST)及其在南部WNP北方WNP中形成的TCS更加倾向于形成更多的TC,以在南方WNP中形成较强的TC。

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    《Journal of Climate》 |2017年第17期|共10页
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  • 正文语种 eng
  • 中图分类 气候学;
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