Derivation of the thermal characteristics of mesoscale eddies

• 作 者: CHEN Xuan PAN Jing ZHENG Chongwei ZHANG Xi HE Ming
• 机 构: The 75839 Army, People’s Liberation Army,National Key Laboratory of Numerical Modeling for Atmospher
• 出 处: Acta Oceanologica Sinica
• 发表日期: 2017年03期
• 关键词: mesoscale symmetrical assumptions derivation thermodynamic coordinate oceanic ro

This study aims at explaining the relationship between thermodynamic characteristics and direction of rotation of mesoscale eddies(MEs). The geometric characteristics of the MEs are under the following assumptions: the structure of the MEs is symmetrical, and changes of oceanic physical variables are close to linear features in the radial direction in the ME regions. Based on these assumptions, by using primitive equations without friction under a cylindrical coordinate system, the thermodynamic characteristics of the MEs are derived, showing that the conventional relationship of warm anticyclonic eddies with high sea surface height(SSH) and cold cyclonic eddies with low SSH is not consistent with the SSH and sea surface temperature(SST) observations of eddies. The results show that the symmetrical form is an ideal approximation for the geometric characteristics of MEs. In consideration of the above assumptions, there are advantages for derivation of the characteristics of the MEs under a cylindrical coordinate.

This study aims at explaining the relationship between thermodynamic characteristics and direction of rotation of mesoscale eddies (MEs). The geometric characteristics of the MEs are under the following assumptions: the structure of the MEs is symmetrical, and changes of oceanic physical variables are close to Based on these radial directions in the ME regions. Based on these assumptions, by using primitive equations without friction under a cylindrical coordinate system, the thermodynamic characteristics of the MEs are derived, showing that the conventional relationship of warm anticyclonic eddies with high sea surface height (SSH) and cold cyclonic eddies with low SSH is not consistent with the SSH and sea surface temperature (SST) observations of eddies. The results show that the symmetrical form is an ideal approximation for the geometric characteristics of MEs. In consideration of the above assumptions, there are advantages for derivation of the characteristics of the MEs unde r a cylindrical coordinate.