The Connectivity of the Winter North Atlantic Oscillation (NAO) and the Summer Okhotsk High
The Connectivity of the Winter North Atlantic Oscillation (NAO) and the Summer Okhotsk High
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DOI：
10.2151/jmsj.2004.905
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发表时间：
2004-06
影响因子：
3.1
通讯作者：
M. Ogi;Y. Tachibana;K. Yamazaki
中科院分区：
文献类型：
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作者：
M. Ogi;Y. Tachibana;K. Yamazaki
我们统计研究冬季北大西洋涛动（NAO）和夏季鄂霍次克高压之间的冬夏季气候连接。结果表明，冬季NAO对欧亚大陆的地面气温、积雪、海冰和巴伦支海附近的海温有着持续的影响。东西伯利亚暖空气温度异常为高空阻塞提供了有利条件。巴伦支海附近的暖信号激发了向鄂霍次克海传播的Rossby波。此外，冬季局部现象的区域持续性，以及它们对夏季鄂霍次克高压的可能影响进行了研究。冬季北大西洋涛动的负位相与冬、春季鄂霍次克海的重海冰有关。春季鄂霍次克海海冰偏多，导致鄂霍次克海海温偏冷。然而，由于鄂霍次克高压与前一个月鄂霍次克海周围的海温没有相关性，鄂霍次克海海冰与夏季鄂霍次克高压的局部联系是不可能的。伴随着鄂霍次克高压的增强，日本东部出现了冷SST异常。这种冷SST异常是对与鄂霍次克高压有关的冷空气平流的响应。我们认为，冬季NAO远程调节冬季海冰，夏季鄂霍次克高压。
We statistically investigated winter-summer climatic connectivity between the winter North Atlantic Oscillation (NAO), and the summer Okhotsk High. We found that the winter NAO persistently influences the surface air temperature, snow cover over the Eurasia continent, sea ice and SST around the Barents Sea region from winter to summer. The warm air temperature anomalies in East Siberia make a preferable condition for upper-level blocking. Warm signals around the Barents Sea region excite the Rossby wave propagating toward the Sea of Okhotsk. In addition, regional persistency of the wintertime local phenomena, and their possible influence on the summertime Okhotsk High is examined. The negative phase of the winter NAO is related to the winter and spring heavy sea ice in the Sea of Okhotsk. The heavy spring sea ice in the Sea of Okhotsk brings about the cold SST around the Sea of Okhotsk. However, since the Okhotsk High does not have correlation with the SST around the Sea of Okhotsk in the previous month, the local connection of the sea ice in the Sea of Okhotsk with the summer Okhotsk High is unlikely. Associated with an enhanced Okhotsk High, cold SST anomalies appear to the east of Japan. This cold SST anomaly is a response to the cold air advection associated with the Okhotsk High. We suggest that the winter NAO remotely regulates both the winter sea ice, and the summer Okhotsk High.