海洋科学
海洋科學
해양과학
MARINE SCIENCES
2001年
1期
28-31
,共4页
东中国海%环流结构%POM模式
東中國海%環流結構%POM模式
동중국해%배류결구%POM모식
在POM的基础上,建立一个σ坐标系下的三维斜压预报模式,考虑了海底地形、外来流、长江径流、海面风应力、海面热交换等多方面因素的影响,较好地模拟了夏季东中国海环流的情况。其结果表明,黑潮在流经东海时沿东海陆坡流动,其途径随陆坡等深线走向而变,在其两侧出现一些涡旋。夏季台湾暖流上层水主要来自台湾海峡,底层水主要由台湾东面黑潮的次表层水入侵陆架生成。夏季进入朝鲜海峡的对马暖流的来源是多方面的,其中有:台湾暖流、黑潮分支、长江冲淡水与西朝鲜沿岸流的混合水。长江冲淡水在出长江口后,很快转向北流动,到34°N附近转向东南方向。在长江口东北面存在两个中尺度的涡旋。夏季黄海冷水环流由南北两部分组成,表层流速大,底层流速小。在青岛石岛附近还存在一个中尺度的反气旋型涡旋。
在POM的基礎上,建立一箇σ坐標繫下的三維斜壓預報模式,攷慮瞭海底地形、外來流、長江徑流、海麵風應力、海麵熱交換等多方麵因素的影響,較好地模擬瞭夏季東中國海環流的情況。其結果錶明,黑潮在流經東海時沿東海陸坡流動,其途徑隨陸坡等深線走嚮而變,在其兩側齣現一些渦鏇。夏季檯灣暖流上層水主要來自檯灣海峽,底層水主要由檯灣東麵黑潮的次錶層水入侵陸架生成。夏季進入朝鮮海峽的對馬暖流的來源是多方麵的,其中有:檯灣暖流、黑潮分支、長江遲淡水與西朝鮮沿岸流的混閤水。長江遲淡水在齣長江口後,很快轉嚮北流動,到34°N附近轉嚮東南方嚮。在長江口東北麵存在兩箇中呎度的渦鏇。夏季黃海冷水環流由南北兩部分組成,錶層流速大,底層流速小。在青島石島附近還存在一箇中呎度的反氣鏇型渦鏇。
재POM적기출상,건립일개σ좌표계하적삼유사압예보모식,고필료해저지형、외래류、장강경류、해면풍응력、해면열교환등다방면인소적영향,교호지모의료하계동중국해배류적정황。기결과표명,흑조재류경동해시연동해륙파류동,기도경수륙파등심선주향이변,재기량측출현일사와선。하계태만난류상층수주요래자태만해협,저층수주요유태만동면흑조적차표층수입침륙가생성。하계진입조선해협적대마난류적래원시다방면적,기중유:태만난류、흑조분지、장강충담수여서조선연안류적혼합수。장강충담수재출장강구후,흔쾌전향북류동,도34°N부근전향동남방향。재장강구동북면존재량개중척도적와선。하계황해랭수배류유남북량부분조성,표층류속대,저층류속소。재청도석도부근환존재일개중척도적반기선형와선。
dimension baroclinic prognostic model on the σ coordinate is established based on POM to simulate the summertime circulation of East China Seas, considering the topography, inflow and outflow on the open boundary, Yangtse River runoff, heat flux and wind stress on the surface. The result shows that, the Kuroshio flows along the continental slope of the East China Seas, its trajectory varies with the slope topograph, and some eddies appear on the both sides of it. In the summer, the upper water of the Taiwan Warm Current is mainly from the Taiwan Strait, and its bottom water is mostly from the sub surface water of the Kuroshio which flows on the shelf while passing through the east of Taiwan Island. The water of the Tsushima Warm Current is of multi source in summer: the Taiwan Warm Current, the branch of the Kuroshio, the mixed water of the Yangtse Diluted Water with the West Korea Coast Current. The Yangtse River Diluted Water quickly turns to north after it flows out the Yangtse River Mouth and then flows southeastward when it arrives at about 34° N. There are two meso scale eddies northeast of the Yangtse River Mouth. In the summer, the Huanghai Cold Circulation is divided into the north and south ones, and surface current is strong and the bottom current is weak. There is a mesoscale anticyclone addy near Qingdao and Shidao.