索马里东岸温度锋季节分布特征分析  

Analysis on seasonal distribution of temperature front in Somalia East Coast

作　　者：刘鹏[1] 张永刚[1] 曹震卿[1] 巨泽光 LIU Peng;ZHANG Yong-gang;CAO Zhen-qing;JU Ze-guang(Dalian Naval Academy, Dalian 116018 China;North ocean fleet air traffic control meteorological office, Qingdao 266000 China)

机构地区：[1]海军大连舰艇学院,辽宁大连116018 [2]北海舰队航空兵航管气象处,山东青岛266000

出　　处：《海洋预报》2017年第6期48-56,共9页Marine Forecasts

摘　　要：基于50 a的SODA的温度数据,利用绝对梯度分析法求出锋面的概率分布,对索马里东岸的温度锋面的分布特征进行了分析。此外利用WOA13的温盐数据,对锋区出现概率较大海区的声速剖面进行了分析。结果表明:温度锋面在浅水处的概率分布与深水处存在异同,锋面主要集中分布在6—10月、6°~10°N沿岸附近,通过研究SODA海流数据,发现锋面分布概率较大的海域有着明显的上升流。利用EOF分析,发现温度锋面的年际变化并不强,主要是年内的季节变化较为明显。声速剖面在有无锋面存在的位置处存在明显差异,上升流带来的底层冷水导致声速要明显小于其他区域,锋面同一位置处,由于夏季锋强最大,锋区的声速也明显小于其他季节。Based on the 50 years temperature data from SODA, the probability distribution of the temperature fronts was obtained by the absolute gradient analysis method. The characteristics of the temperature fronts at the east coast of Somalia were analyzed. Based on the temperature and salinity data of WOA13, sound velocity profiles were analyzed. The results showed that the probability distribution of the temperature fronts in the shallow water was a little different from that in the deep water, and the fronts were mainly distributed in the vicinity of 6—10 months and 6° -10° N. There was a significant increase in the area with large probability of frontal distribution flow. The sound velocity profile in the front area was obviously different from that of other areas. The cold water from the bottom of the upwelling current caused the sound velocity to be significantly smaller than the other areas. At the same position, the sound velocity of the front area is obviously smaller than that of other seasons.

关 键 词：SODA WOA13 温度锋 声速 

分 类 号：P731.11[天文地球—海洋科学]