基于水下滑翔机观测数据的白令海海盆区域温度及溶解氧特征分析  

Characteristic Analysis on Temperature and Dissolved Oxygen in the Bering Sea Based on Underwater Glider Observation Data

作　　者：杨绍琼 李逸铭 陈红霞 牛文栋 马伟 何琰 兰世泉 YANG Shao-qiong;LI Yi-ming;CHEN Hong-xia;NIU Wen-dong;MA Wei;HE Yan;LAN Shi-quan(Key Laboratory of Mechanism Theory and Equipment Design,School of Mechanical Engineering,Tianjin University,Tianjin 300350,China;Qingdao Institute of Ocean Engineering,Tianjin University,Qingdao 266237,China;The Joint Laboratory of Ocean Observing and Detection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;First Institute of Oceanography,MNR,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China)

机构地区：[1]天津大学机械工程学院机构理论与装备设计教育部重点实验室,天津300350 [2]天津大学青岛海洋技术研究院,山东青岛266237 [3]青岛海洋科学与技术试点国家实验室海洋观测与探测联合实验室,山东青岛266237 [4]自然资源部第一海洋研究所,山东青岛266061 [5]青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室,山东青岛266237

出　　处：《海洋科学进展》2021年第3期355-363,共9页Advances in Marine Science

基　　金：国家重点研发计划项目——长航程水下滑翔机研制与海试应用(2016YFC0301100)。

摘　　要：基于2019年夏季中国第十次北极科学考察(“十北”科考)中“海燕”水下滑翔机观测的温度和溶解氧(Dissolved Oxygen,DO)数据,对白令海海盆区水团分类,及其温度和溶解氧分布特征进行了分析研究。结果表明:北极白令海海盆区水体一般由温度差异较为明显的上层水,中层水和深层水组成,其温度水平分布具有东高西低的特点,且随着深度的增加,水平温差逐渐减小。白令海上层水位于50 m以浅的位置,在约30~50 m深度处存在强温跃层,温跃层自西向东深度略有增加,且厚度不均匀,跃层强度约为0.31℃/m;白令海中层水位于50~250 m深度处,主要为冬季残留水,中层冬季残留水分布具有一定地区性差异,在此位置存在温度最小值,约为2.7℃;白令海深层水水体较稳定,温度随深度缓慢降低。对比垂直断面温度特征和溶解氧特征可知,白令海中层冬季残留水溶解氧含量较高,高于上层水团;在中层水与深层水之间存在氧跃层,氧含量从250μmol/L快速下降至50μmol/L,并随着深度的增加,在1000 m深处降至20μmol/L。Based on the temperature and dissolved oxygen data observed by the glider"Petrel"during the 10th Chinese National Arctic Research Expedition(CHINARE)in the summer of 2019,the classification of water mass,the distribution characteristics of temperature and dissolved oxygen in the Bering Sea basin were analyzed and studied.The results show that the water in the Bering Sea basin is generally consists of upper water,middle water and deep water with obvious temperature differences.The horizontal distribution of temperature is characterized by high temperature in the east and low temperature in the west,and the horizontal temperature difference decreases as depth increases.The upper water of the Bering Sea is confined within upper 50 m,a strong thermocline is found at a depth of about 30~50 m and its depth increases slightly from west to east and its thickness is not uniform and the strength of the thermocline is about 0.31℃/m.The middle water of the Bering Sea is located at 50~250 m,which is mainly residual water in winter.The distribution of residual water in winter has regional differences.The minimum temperature at this location is about 2.7℃.The deep water of the Bering Sea is relatively stable and the temperature decreases slowly with depth.By comparing vertical temperature characteristics with vertical dissolved oxygen characteristics,we found that the dissolved oxygen content of the residual water in winter in the middle water is higher than that of upper water mass,and an oxygen thermocline existing between the middle water and the deep water.The oxygen content drops rapidly from 250μmol/L to 50μmol/L as depth increases,and reaches 20μmol/L at 1000 m.

关 键 词：中国第十次北极科学考察 白令海 水下滑翔机 温度 溶解氧(DO) 

分 类 号：P731[天文地球—海洋科学]