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首页> 外文期刊>Journal of oceanography >Linkage between winter air temperature over the subtropical Western Pacific and the ice extent anomaly in the Sea of Okhotsl
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Linkage between winter air temperature over the subtropical Western Pacific and the ice extent anomaly in the Sea of Okhotsl

机译：亚热带西太平洋冬季气温与Okhotsl海冰范围异常之间的联系

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摘要

This study deals with the correlation between ice extent in the Sea of Okhotsk and the interannual variability of winter (December-February) air temperature over the subtropical Western Pacific from 1979 to 2008. The analysis indicates that the increase in sea ice extent coincides not only with cooling over the Sea of Okhotsk and the adjacent area, but also with significant warming over the subtropical Western Pacific that extends from the surface to the middle troposphere. This meridional dipole pattern of tropospheric temperature anomalies (cooling in the high latitudes and warming in the low latitudes) primarily results from dynamical processes driven by the large-scale atmospheric circulation change. A heat budget diagnosis reveals that when ice extent in the Sea of Okhotsk increases by one standard deviation, the tropospheric air temperature over the subtropical Western Pacific rises by about 0.25℃. It also suggests that the adiabatic heating and stationary eddy heat flux convergence may be the most important factors, which account for 30 and 15% of the warming, respectively. In addition, these two factors also coordinate to result in significant cooling over the Sea of Okhotsk and the adjacent regions.
机译：这项研究处理了鄂霍次克海的冰范围与1979年至2008年亚热带西太平洋冬季（12月至2月）气温年际变化之间的相关性。分析表明，海冰范围的增加不仅重合不仅受到鄂霍次克海及其邻近地区的冷却，而且还伴有从地表到对流层中部的亚热带西太平洋的明显变暖。对流层温度异常的这种子午偶极子模式（高纬度地区的降温和低纬度地区的变暖）主要是由大气环流大规模变化驱动的动力学过程造成的。热预算的诊断表明，当鄂霍次克海的冰层面积增加一个标准差时，副热带西太平洋的对流层空气温度将升高约0.25℃。这也表明绝热加热和涡流热通量收敛可能是最重要的因素，分别占变暖的30％和15％。此外，这两个因素还相互协调，导致鄂霍次克海及邻近地区出现明显降温。

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