Shallow temperature inversions in the Pacific Ocean
Shallow temperature inversions in the Pacific Ocean
复制标题
太平洋浅层逆温
DOI：
10.1029/jz069i014p02899
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发表时间：
1964
影响因子：
--
通讯作者：
G. I. Roden
中科院分区：
文献类型：
--
作者：
G. I. Roden
对太平洋深海温度计探测获得的逆温的调查表明，0.50 ℃或更大的逆温不仅发生在极地地区，而且也发生在亚热带和热带地区。这种反转通常与任何静态不稳定性无关。在不同纬度和不同的气流条件下，导致逆温形成的过程是不同的。在极地地区，辐射和蒸发冷却似乎是主要的过程;在副热带纬度地区，逆温似乎主要是由于不同来源的水的差异平流。在强速度切变层内，急流状逆流和暗流区域的逆温发生，可能是由于湍流。最大的逆温，约4°C，发生在日本北方外的黑潮-俄亥俄边界附近。定点观测表明，逆温强度的时间变化以及最高温度的深度和垂直范围在小时、日和月时间尺度上具有相同的数量级。几个理论模型进行了讨论。
Investigations of temperature inversions obtained from bathythermograph soundings in the Pacific revealed that inversions 0.50C or larger occur not only in polar regions but also in the subtropics and tropics. Such inversions are usually not associated with any static instabilities. The processes leading to the formation of the temperature inversions differ in different latitudes and under different flow conditions. In polar regions radiative and evaporative cooling appears to be the chief process; in subtropical latitudes inversions seem to be mostly due to differential advection of water of different origin. Inversions in the region of the jetlike countercurrents and undercurrents occur within the layer of strong velocity shear and may be due to turbulence. The largest temperature inversions, about 4°C, are found to occur near the Kuroshio-Oyashio boundary off northern Japan. Observations at fixed points indicate that the time variations of the intensity of the inversion and of the depth and vertical extent of the temperature maximum are of the same order of magnitude for hourly, daily, and monthly time scales. Several theoretical models are discussed.