DYNAMIC INSTABILITY OF LARGE-SCALE SEA SURFACE TEMPERATURE (SST) DISTURBANCE AND THE FORMATION OF SE

• 作 者: 朱抱真 骆美霞 黄荣辉
• 机 构: Institute of Atmospheric Physics, Aeademia Sinicarrrrrrrrn,Institute of Atmospheric Physics
• 出 处: Science in China,Ser.B
• 发表日期: 1982年01期
• 关键词: SSTA disturbance SURFACE ocean instability DYNAMIC transportation seasonal scale

This paper proposes that the formation of SSTA is a dynamic instability of large-scaleSST disturbance. Using a linear coupled air-sea model, in which the baroclinic atmosphere isdivided into two levels and the ocean is a mixture layer and a deep water layer, we obtainphysical conditions as well as spatial and temporal seales for the growing of SST disturbance.The major factors for the growing of SST disturbance include Sverdrup transportation, heatexchange between mixture layer and deep water, and modulation effect of clouds on solarradiations. The main horizontal scales of growing SST disturbance range from 3000 to 6000km and its temporal scales are several months. even soveral years. On the basis of thesetheoretical results, the causes for the formation of SSTA are also discussed.

This paper proposes that the formation of SSTA is a dynamic instability of large-scale SST disturbance. Using a linear coupled air-sea model, in which the baroclinic atmosphere isdivided into two levels and the ocean is a mixture layer and a deep water layer, we obtainphysical conditions as well as spatial and temporal seales for the growing of SST disturbance.The major factors for the growing of SST disturbance include Sverdrup transportation, heatexchange between mixture layer and deep water, and modulation effect of clouds on solar radiations. The main horizontal scales of growing SST disturbance range from 3000 to 6000km and its temporal scales are several days. even soveral years. On the basis of these theological results, the causes for the formation of SSTA are also discussed.