| YU Peilong,ZHANG Lifeng,ZHANG Yongchui,DENG Bing.Interdecadal change of winter SST variability in the Kuroshio Extension region and its linkage with Aleutian atmospheric low pressure system[J].Acta Oceanologica Sinica,2016,35(5):24-37 |
| 冬季黑潮延伸体海表温度变率的年代际变化及其与阿留申大气低压系统的关系 |
| Interdecadal change of winter SST variability in the Kuroshio Extension region and its linkage with Aleutian atmospheric low pressure system |
| 投稿时间：2015-09-28 修订日期：2016-01-20 |
| DOI：10.1007/s13131-016-0859-0 |
| 中文关键词: 海表温度(SST)变率 年代际变化 黑潮延伸体(KE) 阿留申低压(AL) |
| 英文关键词:sea surface temperature (SST) variability interdecadal change Kuroshio Extension Aleutain Low |
| 基金项目:The National Basic Research Program (973 program) of China under contract No. 2013CB956203; the National Natural Science Foundation of China under contract No. 41375063. |
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| 中文摘要: |
| 本文利用多套现今发布的百年长度数据集,研究了冬季黑潮延伸体 (KE) 海表温度 (SST) 变率的年代际变化特征。结果表明,KE SST呈现出显著的准6年和准10年振荡,并且这些振荡有着明显的年代际变化特征。其中,准6年振荡主要出现在1930-1950年间,而准10年振荡主要出现在20世纪80年代后。进一步分析可发现这些KE SST振荡均与阿留申低压 (AL) 的活动有关,但物理机制有着明显差异。在1930-1950年间的准6年尺度上, AL主要通过其强度变化引起异常表面净热通量强迫和Ekman热输运来影响同期的KE SST变化;在80年代后的准10年尺度上, AL则主要通过其南北位置的移动激发海洋Rossby波来影响2年后的KE SST变化。 |
| 英文摘要: |
| By utilizing multiple datasets from various sources available for the last 100 years, the existence for the interdecadal change of the winter sea surface temperature (SST) variability in the Kuroshio Extension (KE) region is investigated. And its linkage with the Aleutian Low (AL) activity changes is also discussed. The results find that the KE SST variability exhibits the significant ~6 a and ~10 a oscillations with obvious interdecadal change. The ~6 a oscillation is mainly detected during 1930-1950, which is largely impacted by the anomalous surface heat flux forcing and Ekman heat transport associated with the AL intensity variation. The ~10 a oscillation is most evident after the 1980s, which is predominantly triggered by the AL north-south shift through the bridge of oceanic Rossby waves. |
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