Climate control of the global tropical storm days (1965–2008)
Climate control of the global tropical storm days (1965–2008)
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DOI：
10.1029/2010gl042487
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发表时间：
2010-04
影响因子：
5.2
通讯作者：
Bin Wang;Yuxing Yang;Q. Ding;H. Murakami;F. Huang
中科院分区：
文献类型：
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作者：
Bin Wang;Yuxing Yang;Q. Ding;H. Murakami;F. Huang
过去44年（1965-2008年）的热带风暴日数在全球范围内保持一致，这为有关成因、路径和寿命的综合信息提供了另一种度量标准。利用“最佳路径”数据对全球风暴日数和海表温度场进行季节相关奇异值分解。主导全球风暴日数变化的主导模态显示出北太平洋活动增强和北大西洋活动减少之间的东西对比，以及南半球海洋活跃热带和不活跃副热带之间的南北对比，这与厄尔尼诺和太平洋年代际振荡（PDO）的正相位相结合。第二种模式揭示了与全球变暖相结合的补偿趋势模式：北大西洋和印度洋-太平洋暖池（17.5°S-10°N，70-140°E）的上升趋势和太平洋，特别是南太平洋的下降趋势。然而，全球风暴日数没有显示出任何趋势，只是在厄尔尼诺-南方涛动和PDO的驱动下出现了意想不到的大幅波动。到目前为止，热带地区约0.5 ℃的气温上升尚未影响全球热带风暴天。
The tropical storm days have a consistent global record over the past 44 years (1965–2008), which provides an alternative metric for integrated information about genesis, track, and lifespan. Seasonal‐reliant singular value decomposition is performed on the fields of the global storm days and sea surface temperature by using the “best track” data. The leading mode, which dominates the variability of the global total number of storm days, displays an east‐west contrast between enhanced activity in the North Pacific and reduced activity in the North Atlantic and a north‐south contrast in the Southern Hemisphere oceans between active tropics and inactive subtropics, which are coupled with the El Niño and a positive phase of the Pacific Decadal Oscillation (PDO). The second mode reveals a compensating trend pattern coupled with global warming: upward trends over the North Atlantic and the Indo‐Pacific warm pool (17.5°S–10°N, 70–140°E) and downward trends over the Pacific, especially the South Pacific. However, the global total number of storm days shows no trend and only an unexpected large amplitude fluctuation driven by El Niño‐Southern Oscillation and PDO. The rising temperature of about 0.5°C in the tropics so far has not yet affected the global tropical storm days.