Remote westerly wind forcing of the eastern equatorial Pacific; Some model results
Remote westerly wind forcing of the eastern equatorial Pacific; Some model results
复制标题
赤道东太平洋的远程西风强迫；
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
B. Giese
中科院分区：
文献类型：
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作者：
D. E. Harrison;B. Giese
利用一个海洋环流模式研究了东太平洋对西太平洋地面西风的响应模式。1986年5月的一场热带气旋风暴。通过减去原本存在的环流，可以隔离这一事件导致的海洋变化。第一模态和第二模态的Kelvin斜压脉冲具有相似的地面东向气流，当地面温度梯度为负时，会引起局地增暖。开尔文脉冲还引入了东太平洋不稳定波的调制，最初增加了海洋中部的变暖，然后将其抑制。南美洲海岸变暖是实质性的，但发生在风事件之后的许多个月，因为它主要是由第二斜压模态响应引起的。最近对海洋对气旋事件的反应的分析集中在第一模式开尔文脉冲反应上;这项工作表明，从这个角度来看，对反应只有非常不完整的看法。
An ocean circulation model is used to examine modes of eastern Pacific ocean response to an episode of surface westerly winds in the western Pacific. This episode resembles the May 1986 tropical cyclone pair event. The ocean changes resulting from this episode are isolated by subtracting the circulation that would otherwise have been present. First and second mode baroclinic Kelvin pulses have comparable surface eastward flow, and cause local warming when the surface temperature gradient is negative. The Kelvin pulses also introduce modulations of the eastern Pacific instability waves, which initially increase the mid-ocean warming and then damp it out. South American coastal warming is substantial, but occurs many months after the wind event because it results primarily from the second baroclinic mode response. Recent analyses of the ocean response to the cyclone event have concentrated on the first mode Kelvin pulse response; this work indicates that only a very incomplete view of the response is possible from this perspective.