Stand‐Alone Eastern Pacific Coastal Warming Events
Stand‐Alone Eastern Pacific Coastal Warming Events
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独立的东太平洋沿海变暖事件
DOI：
10.1029/2019gl084479
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发表时间：
2019
影响因子：
5.2
通讯作者：
L. Stramma
中科院分区：
文献类型：
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作者：
J. Lübbecke;Daniela Rudloff;L. Stramma
2017年初，秘鲁海岸出现了明显的温暖异常。这种“沿海Niño”造成了暴雨，导致秘鲁和厄瓜多尔发生洪水。与此同时，赤道太平洋地区普遍处于中立状态。利用1900 - 2010年期间的海面温度观测数据集和海洋再分析产品，对以前的类似事件进行了调查。确定了18个没有相应赤道太平洋变暖的沿海变暖事件。然而，进一步的分析表明，这些事件中只有四个与赤道太平洋中部无关。所有其他强烈的沿海暖异常时期都直接紧随或先于类似厄尔尼诺Niño的条件。“独立”沿海变暖事件的特点是赤道热含量相对较低。因此，我们假设，在2015/2016年强厄尔尼诺Niño之后，赤道太平洋的热量含量减少，阻止了2017年变暖向西扩散。
A pronounced warm anomaly occurred at the Peruvian coast in early 2017. This “Coastal Niño” caused heavy rainfalls, leading to flooding in Peru and Ecuador. At the same time, neutral conditions prevailed in the equatorial Pacific. Using observational sea surface temperature data sets and an ocean reanalysis product for the time period 1900 to 2010, previous similar events are investigated. Eighteen coastal warming events without corresponding equatorial Pacific warming are identified. Further analysis shows, however, that only four of these events are not connected to the central equatorial Pacific. All other periods of strong coastal warm anomalies are directly followed or preceded by El Niño‐like conditions. The “stand‐alone” coastal warming events are characterized by comparatively low equatorial heat content. We thus hypothesize that the depleted heat content in the equatorial Pacific in the wake of the strong 2015/2016 El Niño prevented the warming to spread westward in 2017.