印度洋大眼金枪鱼和黄鳍金枪鱼渔场水温垂直结构的季节变化  

Seasonal variability of temperature profile in Thunnus obesus and Thunnus albacares fishing ground in the Indian Ocean

作　　者：杨胜龙[1] 马军杰[2] 伍玉梅[1] 唐峰华[1] 张衡[1] 周甦芳[1] 

机构地区：[1]中国水产科学研究院东海水产研究所渔业资源与遥感信息技术重点开放实验室,上海200090 [2]同济大学法学院/知识产权学院,上海200092

出　　处：《海洋科学》2012年第7期97-103,共7页Marine Sciences

基　　金：国家863计划(2007AA092202);中央级基本业务费(2009T08,2011T10,2008M19);资源与环境信息系统国家重点实验室开放基金(2010KF0005SA)

摘　　要：为了解印度洋大眼金枪鱼(Thunnus obesus)和黄鳍金枪鱼(Thunnus albacares)主要作业渔场温跃层上界温度、深度和垂直温差时空变化特征,采用2007～2010年Argo温度剖面浮标资料,计算了印度洋大眼金枪鱼、黄鳍金枪鱼主要作业渔场次表层温度和温跃层特征参数。研究认为,温跃层上界深度、温度和10～200 m温差存在明显的季节性变化。5～9月在15°～25°S纬向区域存在一块季节性较深的温跃层上界深度区域;在20°S以南海域,12月至次年4月份温跃层上界深度非常浅;在15°S至赤道纬向区域,尤其是在西部,常年存在一块温跃层较浅的区域。总体而言,温跃层上界深度较深的地方温度相对较低,在2～5月期间,在阿拉伯海东南和孟加拉湾西南形成一块大面积的暖水区;7～9月期间,在15°～25°S,纬向区域因温跃层上界深度较深,从表层至温跃层上界深度温度变化相对较大,温跃层上界温度显著较低。在20°S以南,温跃层上界温度常年都很低。10°S经线方向将水下10～200 m垂直温度分成南北两部分,10°S以南部及以北部海区的垂直温差分别大于和小于10℃。分析结果初步揭示了金枪鱼主要作业渔场温跃层上界温度、深度和垂直温差分布特征,为金枪鱼实际生产作业提供理论参考。In order to study the spatial distribution seasonal characteristic of the upper boundary depth, temperature of the thermocline and vertical temperature difference of the fishing ground of Thunnus obesus and Thunnus alba- cares in the Indian Ocean, the subsurface temperature and thermocline characteristics parameters were estimated based on temperature data of Argo profile floats from 2007 to 2010. Based on these basic work, the monthly distri- bution figures of the upper boundary depth, temperature of the thermocline and vertical temperature difference from 10 to 200 m were plotted. The topography of the upper boundary depth, temperature of the thermocline and vertical temperature difference from 10 to 200 m showed obvious seasonal variability. The variability of the upper boundary depth of the thermocline on the annual mode is very weak between the equator and 15°S zonal where the upper boundary depth of the thermocline is present very shallow throughout the year and large away from the equator in the Arabian Sea and the southern tropic Indian Ocean. there is a seasonal deep zonal of the upper boundary depth of the therrnocline between 15°S and 25°S during May to September and a seasonal shallow zonal in the south of 20°S during December to April of next year. In generally, the upper boundary temperature of the thermocline is low where the upper boundary depth of the thermocline is deep, On the annual mode, the upper boundary temperature of the thermocline presents a warm-pool region in the southeastern of Arabian sea and the southwestern of Bay of Bengal during February to May and a lower temperature zonal in south of 20°S throughout year. The upper bound- ary depth of the thermocline is very deep between 15°S and 25°S during May to September so that the temperature variation between sea surface and the upper boundary depth of the thermocline is very large, the upper boundary temperature of the thermocline is very low. The variability of the upper boundary temperature of the thermocline topography is lar

关 键 词：大眼金枪鱼(Thunnus obesus) 黄鳍金枪鱼(Thunnus albacares) 印度洋 渔场 温跃层 垂直温差 季节变化 

分 类 号：P731[天文地球—海洋科学]