| WANG Yanxin,YANG Xiaoyi,HU Jianyu. 2016. Position variability of the Kuroshio Extension sea surface temperature front. Acta Oceanologica Sinica, 35(7):30－35 |
| Position variability of the Kuroshio Extension sea surface temperature front |
| 黑潮延伸体海表温度锋位置的变化特征 |
| Received:January 11, 2016 Revised:March 03, 2016 |
| DOI：10.1007/s13131-016-0909-7 |
| Key words:Kuroshio Extension Kuroshio Extension front sea surface temperature |
| 中文关键词: 黑潮延伸体 黑潮延伸体锋面 SST |
| 基金项目:The National Basic Research Program of China under contract Nos 2015CB954004 and 2012CB417402; the National Natural Science Foundation of China under contract Nos 41576178 and U1405233. |
| Author Name | Affiliation | E-mail | | WANG Yanxin | 1 State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | YANG Xiaoyi | 1 State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | xyyang@xmu.edu.cn | | HU Jianyu | 1 State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | |
|
| Hits: 2511 |
| Download times: 1379 |
| Abstract: |
| High spatial resolution sea surface temperature (SST) data from 1993 to 2013 are used to detect the position of the Kuroshio Extension sea surface temperature front (KEF) from 141°E to 158°E, and the seasonal, monthly and interannual-to-decadal variations of the KEF position are investigated. The latitudinal position of the KEF varies with longitudes:the westernmost part of the KEF from 141°E to 144°E is relatively stable, whereas the easternmost part from 153°E to 158°E exhibits the largest amplitude of its north-south displacement. In the light of the magnitudes of the standard deviations at longitudes, then the KEF is divided into three sections:western part of the KEF (KEFw, 141°-144°E), central part of the KEF (KEFc, 144°-153°E) and eastern part of the KEF (KEFe, 153°-158°E). Further analysis reveals that the KEFw position is dominated by the decadal variability, while the KEFc and KEFe positions change significantly both on interannual and decadal time scales. In addition, the KEFw position is well correlated with the KEF path length. The possible mode leading to the decadal oscillation of the KEFw is further discussed. The KEFw position exhibits significant connections with the Pacific decadal oscillation (PDO) index and the north Pacific gyre oscillation (NPGO) index with a time lag of 40 and 33 months, respectively. |
| 中文摘要: |
| 利用1993-2013年高分辨率的海表温度（SST）资料判断141-158°E经度范围内黑潮延伸体海表温度锋面（KEF）的位置，并描述了KEF位置的季节、月份以及年际-年代际变化特征。KEF的纬度位置在不同经度上存在差异：其中KEF最靠西的部分（141-144°E）相对稳定，最靠东的部分（153-158°E）显示出最大振幅的南北位移。根据KEF位置在各经度上的标准差大小，可将KEF（141-158°E）分为三段：KEF西段（141-144°E）、KEF中段（144-153°E）、KEF东段（153-158°E）。分析表明KEF西段的位置由年代际变化所主导，而KEF中段和KEF东段的位置同时表现出显著的年际、年代际时间尺度的变化。此外，KEF西段的位置与KEF的路径长度有很好的对应关系。我们还进一步讨论了可能引起KEF西段年代际振荡的模态，KEF西段的位置与太平洋年代际振荡（PDO）指数、北太平洋环流振荡（NPGO）指数分别存在滞后40、33个月的显著相关。 |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
