摘要
本文主要根据中美联合考察的温盐资料,分析了调查海区冬季温盐结构及其所表征的流系,主要结果如下:(1)传统上作为表征外海水进入南黄海的温度和盐度的水平分布均显示出双峰特征,但这并不意味着存在着相应的流场;(2)黄海沿岸流的范围不仅比通常认为的更狭窄,而且更贴近海岸,而朝鲜西岸沿岸流看来比过去认为的弱一些;(3)南黄海表层环流的图案可能不是由一个环型而是由两个环型构成的。亦即,除了在南黄海西侧存在着通常认为的气旋型环流外,在其东侧还存在着反气旋型环流。
A field hydrographic program covering the whole area of the southern Huanghai Sea was quasi-synchronously carried out by Chinese and American Scientists on board R/V 'Jinxing 2' and R/V 'Thompson' in Jan., 1986. The hydrographic data in this survey were acquired by the MARK III CTD System. Comparison of historical data with that from R/V 'Jinxing 2' and R/V 'Thompson' shows that the salinity data from R/V 'Thompson' have systematic errors. With the salinity data from the R/V 'Jinxing 2' as a standard, we chose 6 pairs of 'quasi-synchronous station' listed in Tab. 2 as the base of regression analysis and obtained the following formular for correction:S= 19.790 8 + 6.838 9ln(S0 - 26.18) where So is raw salinity from the R/V 'Thompson', S, the corrected salinity. Statistical qu- antities relevant to formular (1) are: correlation coefficient, R = 0.999 997, sum of squares due to regressions, U = 79518.3, residual sum of squares, Q = 0.474 24, variance, 5 = 0.064498 and F(l, 116) = 1.911 5×107>>6.90 at the 1% significance.Based on the above temperature and corrected salinity data, the hydrographic features in the survey area are analyzed and the current systems as inferred from hydrographic analysis are obtained, from which the main results can be summarized as follows:1. Conventional wisdom has it that the high temperature and high salinity water in the central part of the Huanghai Sea is from the Kuroshio Water or the Tsushima Warm Current Water, and that the direction of the water tongue shows the path of the Huanghai Sea Warm Current. The analysis of this paper shows that the tongues of the above high temperature and high salinity waters in winter have the 'bi-peaks' or the 'bimodal distributions'. Moreover, the bimodal distributions do not mean that the Huanghai Warm Current, in conventional sense, has also two branches.2. The 1986 hydrographic data show that the Huanghai Warm Current in the lower layer will probably go northward along the Huanghai Sea Trough if it exists in winter.3. The above data also show that the southward Huanghai Sea Coastal Current is not so wide as conventionally believed, but nearer to the coast than it used to be.4. The southward Korea West Coast Current is a weak current Jan., 1986 and its transport seems less than that on an average for the past 20 years.5. If the Huanghai Warm Current characterized by the high temperature and high salinity tongues in the central part of the Huanghai Sea is strong enough, the surface circulation picture will probably not be a single pattern of circulation, but two patterns, one cyclonic circulation in the west side of the southern Huanghai Sea as used to be belived, and one which could exist a stronger anticyclonic circulation in the east side, with some small weak eddies in between.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1990年第6期505-515,共11页
Oceanologia Et Limnologia Sinica
