Abstract:
The tropical marine atmospheric boundary layer has a very important role to play in various scale air-sea interaction processes. With the development of ocean observing systems, the research on the air-sea boundary layer has made a great deal of progress. This paper reviews the main progress of the tropical air-sea boundary layer observational studies over the past decade, which is the research of flux exchange characteristics, turbulence spectrum characteristics and boundary layer jet under the tropical cyclone high wind conditions. The study results show that the value of the drag coefficient at sea surface is not magnifying with the wind speed increasing when the wind reaches the value in strong wind conditions. And the results also illustrate that there is a low-level jet in the tropical cyclone boundary layer, but the jet height is not consistent in different research work. Meanwhile, the observational studies on the turbulence and boundary layer structure are proposed in two common weather systems such as sea fog and the South China Sea Monsoon over the low latitudes areas of China. The results show that the South China Sea fog is different from the East China Sea fog and Yellow Sea fog over high latitude regions in the atmospheric boundary layer structure and the generation mechanism of sea fog. The summer monsoon system has a great impact on the weather and climate in China. Studies have shown that the flux and boundary layer structure before or after the monsoon onset have their own characteristics. It is found that the flux exchange and boundary layer structure of the marine atmospheric boundary layer are different under different weather systems, so that these characteristics should be treated separately in the study of air-sea interaction, and boundary layer parameterization of air-sea coupled model should be targeted. Finally, in order to improve and refine numerical prediction model, a proposal of tropical marine meteorological observations is put forward, which will be the point (observation site) combined with surface (satellite) observations to explore the air-sea interface flux exchange and atmospheric boundary layer characteristics in the various weather conditions. And then the marine weather forecasting service capabilities will be further improved by these studies.