On the definition of El Nino and associated seasonal average US weather anomalies
On the definition of El Nino and associated seasonal average US weather anomalies
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DOI：
10.1029/2005gl022738
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发表时间：
2005-07-12
影响因子：
5.2
通讯作者：
Harrison, DE
中科院分区：
文献类型：
--
作者：
Larkin, NK;Harrison, DE
美国国家海洋和大气管理局（NOAA）对厄尔尼诺的新定义确定了一些超出传统共识的额外厄尔尼诺季节。这些额外的季节主要以赤道中太平洋西部的海表温度异常为特征。我们在此表明，与这些额外的日界线厄尔尼诺季节相关的美国季节性天气异常与传统厄尔尼诺季节相关的异常有很大不同。尽管一些地区有相似的相关异常，但大多数主要区域的异常差异很大。将两者视为单一现象会导致整体季节性天气关联较弱，并且无法利用将两者分开处理时可获得的更强关联。
A new NOAA definition of El Nino identifies a number of additional El Nino seasons beyond those conventionally agreed. These additional seasons are characterized by SST anomalies primarily in the western central equatorial Pacific. We show here that the seasonal weather anomalies over the U. S. associated with these additional Dateline El Nino seasons are substantially different from those associated with conventional El Nino seasons. Although some regions have similar associated anomalies, most of the major regional anomalies are quite different. Treating the two as a single phenomenon yields weaker overall seasonal weather associations and does not take advantage of the stronger associations available when the two are treated separately.