CAJ | 학술논문

本文利用PN断面的高分辨率海水温-盐-深剖面测量仪(CTD)温度、盐度和密度资料进行分析,发现PN断面处的水团有明显的陆架水和黑潮水的交汇特征,且随着季节的变化PN断面处的水团特征也发生明显的变化.通过观测资料还确定了PN断面处障碍层是常年存在的而且具有显著的季节变化.采用曲线族拟合的水团分析方法,根据不同季节PN断面上陆架水和黑潮水的混合特征.证明了水团混合在障碍层形成及季节变化中的重要作用,发现障碍层的季节变化与陆架水团和黑潮水团混合的季节变化密切相关.夏季,陆架水刚向外海延伸,浮置于黑潮水之上,此时障碍层深度最浅,障碍层厚度最大;秋季,黑潮水离岸最近,将黑潮水与陆架水的交汇处向西压迫至陆架内,此时几乎不存在障碍层,零星存在的障碍层深度较深,厚度是一年当中最薄的;冬季,由于黑潮水的核心相对于秋季向深海移动,使得陆架混合水也相应地向外海拓展,而且此时陆架水与黑潮水的交汇处不只在混合层内而是影响到跃层,此季节障碍层是一年当中深度最深,厚度最厚的;春季,黑潮水的核心以及两种水团的交汇处相对于冬季的位置更向深海移动,所以此时PN断面上的障碍层深度和厚度相对于冬季变化不大,只是位置东移.海面风场和净热通量场通过改变混合层的深度影响障碍层深度的季节变化,而海面降水对于季节平均的障碍层分布和变化都没有显著的影响.
본문이용PN단면적고분변솔해수온-염-심부면측량의(CTD)온도、염도화밀도자료진행분석,발현PN단면처적수단유명현적륙가수화흑조수적교회특정,차수착계절적변화PN단면처적수단특정야발생명현적변화.통과관측자료환학정료PN단면처장애층시상년존재적이차구유현저적계절변화.채용곡선족의합적수단분석방법,근거불동계절PN단면상륙가수화흑조수적혼합특정.증명료수단혼합재장애층형성급계절변화중적중요작용,발현장애층적계절변화여륙가수단화흑조수단혼합적계절변화밀절상관.하계,륙가수강향외해연신,부치우흑조수지상,차시장애층심도최천,장애층후도최대;추계,흑조수리안최근,장흑조수여륙가수적교회처향서압박지륙가내,차시궤호불존재장애층,령성존재적장애층심도교심,후도시일년당중최박적;동계,유우흑조수적핵심상대우추계향심해이동,사득륙가혼합수야상응지향외해탁전,이차차시륙가수여흑조수적교회처불지재혼합층내이시영향도약층,차계절장애층시일년당중심도최심,후도최후적;춘계,흑조수적핵심이급량충수단적교회처상대우동계적위치경향심해이동,소이차시PN단면상적장애층심도화후도상대우동계변화불대,지시위치동이.해면풍장화정열통량장통과개변혼합층적심도영향장애층심도적계절변화,이해면강수대우계절평균적장애층분포화변화도몰유현저적영향.
Based on the hydrographic conductivity-temperature-depth sensors(CTD) data and the vertical gradient method, we have examined the seasonal variation of barrier layer along the PN transect in the East China Sea. The seasonal variation of the barrier layer is determined by the water mass mixed in the continental shelf. In summer,the continental shelf water stretches towards the deep sea and floats over Kuroshio. The depth of the barrier layer in this season is the shallowest. In autumn, Kuroshio is the dosest to nearest the continental shelf. The encountering area of them is suppressed to the continental shelf. There is almost no barrier layer and the sporadic barrier layer is thin and its depth is deep. In winter, both Kuroshio and the continental shelf water move towards the deep sea, and the encountering position is deep enough to influence the pycnocline in the deep sea. So the barrier layer in winter is the deepest and thickest of the year. In spring, the encountering position of the two water mass moves towards the deep sea relative to winter. The depth and the thickness of the barrier layer in spring are similar to those in winter,while its position moves eastward. The sea surface wind stress and net heat flux in the PN section affect the seasonal variation of the barrier layer depth by changing the mixed layer depth every season. However, there is no obvious influence from precipitation to the seasonal variation of barrier layer distribution.