极地研究2016，Vol.28Issue(2)：219-227,9.DOI:10.13679/j.jdyj.2016.2.219
2011年初冬南极普里兹湾冰间湖区上层水体结构演化研究
THE EVOLUTION OF UPPER WATER STRUCTURE IN THE PRYDZ BAY POLYNYA REGION DURING ANTARCTIC WINTER,2011
摘要
Abstract
Hydrographic data collected during the early Antarctic winter 201 1 by CTD tags fitted to five elephant seals were analyzed to study the evolution of the upper water layer in the Prydz Bay polynya adjacent to the Amery Ice Shelf.The evolution of upper ocean structure could be divided into three stages.First,temperature shifted from a stratified profile to homogeneity.Warm water was still present in the subsurface in late March.This warm water gradually disappeared with cooling of the surface water,so the temperature profile evolved from temperature inver-sion to homogeneity at temperatures close to freezing.Second,salinity shifted from a stratified profile to homogenei-ty.Salinity increased with the freezing of seawater,which strengthened vertical convection and resulted in homoge-neous salinity throughout the upper water layer.Third,seawater continued to cool and salinity continued to in-crease.Air-sea heat fluxes calculated from temperature and salinity profiles during the first,second and third stages were -90.93 W·m -2 , -82.20 W·m -2 and -43.44 W·m -2 ,respectively.The increase in salinity was mainly the result of sea ice formation,and the sea ice formation rates were 5.4 cm·d -1 ,4.9 cm·d -1 and 2.5 cm·d -1 ,respectively.In summary,the present study demonstrated that during the early Antarctic winter,as tem-peratures in the upper water layer continued to decrease and salinity increased,the heat flux released from ocean to atmosphere and the sea ice formation rate gradually decreased.关键词
普里兹湾/冰间湖/象海豹/CTD标志/水体结构演变/海冰形成速率Key words
Prydz Bay/polynya/elephant seal/CTD tag/evolution of water structure/ice formation rate引用本文复制引用
高郭平,闫敏斐,徐智昕,程灵巧,张春玲..2011年初冬南极普里兹湾冰间湖区上层水体结构演化研究[J].极地研究,2016,28(2):219-227,9.基金项目
国家海洋局“南北极环境综合考察与评估”专项（CHINARE2014-01-01）、国家自然科学基金项目（41506219）和上海市浦江人才计划项目（15PJ140300）资助 （）
