海洋表层流模式和月尺度海气耦合试验

本文第一部分设计了一个海洋表层流模式，较成功地模拟出冬夏季海表层中的大尺度洋流和海面高度第二部分是月时间尺度的海气耦合试验，将海表层洋流模式和球带范围的大气模式相耦合，用数值试验讨论了洋流和海气耦合方式对模拟结果的影响。

SEA SURFACE OCEANIC CURRENT MODEL AND AIR-SEA COUPLING EXPERIMENTS IN MONTHLY TIME SCALE

In the first part of this paper, a sea surface oceanic current model (SSOCM) is developed, both the large scale oceanic current and the free sea surface height fields in winter and in summer are simulated by use of the model. In the second part, four experiments are made for the time scale of a month, in three of the four experiments, the SSOCM is coupled with a zonally global atmospheric model, in another experiment, the original mixing layer ocean temperature model for computing the sea temperatures(SSOTM) is used, the effects of the oceanic current and the coupling schemes on the modeling results are discussed. Results show that the simulated oceanic currents and free sea surface heights by the SSOCM developed in this paper are fairly in agreement with the observation. The SSOCM could be coupled with atmospheric models in order to do climate modelings and predictions in a monthly time scale. In the time scale of a month, changs of the sea surface ternperature (SST) are mainly affected by the heat exchange between the air and the sea, the oceanic current does not have much influences on them. This makes all the four experiments have similar properties of the simulated atmospheric fields. Although the SST changes induced by the oceanic current are not large, they could still result ) the intensitles of the cross cquatorial currents,the amounts of precipitation, the distributions of pressure systems both at the low and thehigh levels and so on are all in good responses to the SST changes. The air-sea coupling time intervals have also but not large influences on the simulations. The simulated atmospheric fields, on the contrary, have very evident influences on the model oceanic currents,It seems that in a monthly time scale, the effects of the air-sea coupling are mainly reflected in the dynamic forcing of the atmosphere on the ocean.