摘要
本文应用守恒法计算并讨论了冬季南黄海的环流热输送以及海-气界面的热收支,同时提出了一个应用于边缘海的冬季热量输送的物理模型,并将海流的平流热输运与垂直的海-气热交换结合起来,计算结果表明了模型的正确性及其物理上的合理性。
In this paper, we apply the direct method to heat transportation problem in Southern Huan-ghai Sea in winter.Fig. 1 shows that in the area surrounded by section S, N and E, velocity field is not very intricate. In winter the average wind field is northerly. Near China coast is the strong and wide China Coast Current (CCC). In the center is the Huanghai Sea Warm Current (HSWC) with an average velocity of 0.2-0.3 kn. The wind causing mechanism of this current is widely accepted. In Korea coast it is the Korea Coastal Current (KCC) from north to south. Fig. 2 and Fig. 3 are temperature profiles of section S and N. They show that in this area sea water has vertically mixed. Average temperature of CCC is 8℃ and that of HSWC is 12℃ at S section, while those of CCC, HSWC and KCC are 4.5℃, 7℃ and 5℃ at N section. At E section, where KCC flow out of this area, the temperature is 8℃. From the data of the temperature we can establish an one-storey box model (see Fig. 4), then we solve the volume conservation and heat conversation equations by using the EK method (see Talley, 1984). Then the heat horizontal circulation transport into this area is QCT=4.712×1012J/s, the sea-atmosphere heat budget in Jan. (heat set out into atmosphere) isQys =9.427×1012J/s. So the convergence of the heat isQt= -4.715×1012J/s.It can be seen that Qt<0, this is to say, the temperature of sea water is continually inclining. Neglecting the horizontal circulation and disperse action, from the two-dimensional vertical integrated temperature disperse equation we come to that in a month the average temperature of the sea water decreases by 1.5℃, as shown by the actual data in Fig. 8 and Fig. 9.In further analysis the relationship between salinity and evaporation minus precipitation should be taken into account, and more current meter data would make the result more accurate.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1989年第3期274-280,共7页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金资助课题
