Variability of core layer temperature (CLT) of the North Pacific subtropical mode water
Variability of core layer temperature (CLT) of the North Pacific subtropical mode water
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DOI：
10.1029/2000gl011716
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发表时间：
2001-06-01
影响因子：
5.2
通讯作者：
Kamada, J
中科院分区：
文献类型：
--
作者：
Hanawa, K;Kamada, J
利用1998年世界海洋数据库（WorldOcean Database 1998）中的温度资料，建立了1957 ~ 1996年40年间北太平洋副热带模态水核心层温度（CLT）的时间序列。CLT被定义为在单个剖面上具有最小垂直温度梯度的层的温度，温度范围为15至19 ℃。年平均CLT是使用从5月到12月的所有CLT数据计算的，为4个5度x 10度（纬度）。x长度）北纬30度到35度，东经140度到180度。CLT时间序列具有年代际到年代际变化和年际变化。这一时间序列与同一地区冬季（2月和3月）海表温度的时间序列相关性很好。研究了几种大气环流指数、黑潮输送和CLT之间的关系。因此，这表明，CLT可能是关键的影响，黑潮输送的时间框架超过10年，冬季东亚季风在较短的时间框架。
A time series of the core layer temperature (CLT) of the North Pacific subtropical mode water for the 40-year period from 1957 to 1996 is constructed using all available temperature profiles archived in World Ocean Database 1998. CLT is defined as the temperature of the layer having the minimum vertical temperature gradient at a single profile, with temperature ranging from 15 to 19 degreesC. Annual mean CLT is calculated using all CLT data taken from May to December for four 5 degrees x 10 degrees (lat. x lon.) regions from 30 degrees to 35 degreesN and from 140 degreesE to 180 degrees. The CLT time series shows decadal to interdecadal variation, as well as interannual variation. This time series correlates very well with that of wintertime (February and March) sea surface temperature in the same region. Relationships are investigated among several atmospheric circulation indices, the Kuroshio transport, and CLT. As a result, it is suggested that CLT might be crucially influenced by the Kuroshio transport in a time frame longer than ten years, and by the wintertime East Asian Monsoon in shorter time frames.