摘要
利用区域大气模拟系统(RAMS)大气模式给出的30 a风场资料作为上边界风应力强迫,用普林斯顿大洋模式(POM)对渤海的潮流和潮位进行了30 a数值计算。给出了M2,S2,O1,K1四个分潮的同潮时线和等振幅线,与环渤海19个验潮站观测的调和常数对比发现,M2分潮振幅的平均误差为4.5 cm,迟角的平均误差为4.2°。分析了渤海海域环流、风海流和潮流的基本特征,并与前人的结果进行比较,两者基本一致。计算了渤海1 000多个网格点的平均海平面高度,比较结果表明,其准确度较高。最后给出了渤海各点的最高和最低天文潮位以及百年一遇极值水位,比较结果表明,虽没有进行单独的风暴潮计算,但计算结果较好地反映了渤海各种水位的特征。
The 30 years of wind field data given by the Regional Atmospheric Modeling System （RAMS） model were used as the upper boundary wind stress forcing, and the numerical computations of 30 years of tide and tidal current data in the Bohai Sea were then made by using the Princeton Ocean Model （POM）. In this paper, the cotidal charts for M2 ,S2 ,O1 and K1 constituents in the Bohai Sea are plotted, and it is shown from the comparison between the cotidal charts and the harmonic constants derived from the observed tidal data at 19 circum-Bohai Sea gauging stations that the mean amplitude error of M2 constituent is 4.5 cm, and the mean phase lag error is 4.2°. The basic characteristics of circulation, wind current and tidal current in the Bohai Sea are analyzed and are basically consistent with the previous study results. The mean sea level height at more than 1000 grid points in the Bohai Sea is calculated, and proved considerably precise as compared with other calculated results. Finally, the highest and lowest astronomical tides and the extreme water levels of 100 year retarn periods at different grid points in the Bohai Sea are given, and it is shown from the comparison results that although the storm surge calculation was not separately made, our computed resJlts well reflect the characteristics of different water levels in the Bohai Sea.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2008年第2期135-144,共10页
Advances in Marine Science
