[Cai, Shuqun; Long, Xiaomin; Wu, Renhao; Wang, Shengan] Chinese Acad Sci, S China Sea Inst Oceanol, LED, Guangzhou 510301, Guangdong, Peoples R China
项目归属:
LED
摘要:
in this paper, based on the 1-degree grided data of the monthly mean temperature and salinity data at standard levels in the South China Sea(SCS), we solve the linearized vertical eigenvalue problem for horizontal large-scale waves, the first baroclinic phase speed c(1) and the first baroclinic Rossby radius of deformation R-1 are obtained. Due to the regional variations of the water depth, stratification and latitude, R-1 varies largely. In most months of a year, in the deep sea area, the effect of temporal variation of the stratification on R-1 can be neglected, however, in November and December, R-1 in the central SCS changes largely due to a large stratification variation of the local water mass; in the wide continental shelf, the effect of temporal variation of the stratification on R-1 is very important. The westward phase speed of the first baroctinic Rossby wave C-R1 derived from observations and numerical models give an independent estimation which is consistent with solving the vertical eigenvalue problem, which shows that the estimated C-R1 could be used to distinguish and trace the propagation signal of baroclinic Rossby waves in the SCS. (C) 2008 Elsevier B.V. All rights reserved.
Cai, SQ; Long, XM; Wu, RH; Wang, SG.Geographical and monthly variability of the first baroclinic Rossby radius of deformation in the South China Sea,JOURNAL OF MARINE SYSTEMS,2008,74(40545):711-720
