During the observational period of our study,Typhoon Hagupit passed over the mooring site and induced strong near-inertial waves(NIWs),which provided an opportunity to investigate the interactions between internal tid...During the observational period of our study,Typhoon Hagupit passed over the mooring site and induced strong near-inertial waves(NIWs),which provided an opportunity to investigate the interactions between internal tides(ITs) and NIWs. Based on the mooring data,we compared the current spectra during the typhoon period and non-typhoon period in the northern South China Sea,and found that the highfrequency waves(f D 1 and f D 2) were evident during the former. Moreover,the observations of the current revealed that f D1 and f D 2 occurred near the depth of strong vertical shear in the NIWs. In order to confirm the generation mechanism of f D1 and f D 2,we compared the positions of strong vertical shear in the NIWs and strong vertical velocity in the ITs. It was established that the vertical shear of the horizontal current of the NIWs and the vertical current of the ITs contributed to the generation of f D1 and f D 2.展开更多
The driving mechanism of thermohaline circulation is still a controversial topic in physical oceanography.Classic theory is based on Stommel's two-box model under buoyancy constraint.Recently,Guan and Huang propos...The driving mechanism of thermohaline circulation is still a controversial topic in physical oceanography.Classic theory is based on Stommel's two-box model under buoyancy constraint.Recently,Guan and Huang proposed a new viewpoint in the framework of energy constraint with a two-box model.We extend it to a three-box model,including the effect of wind-driven circulation.Using this simple model,we further study how ocean mixing impacts on thermohaline circulation under the energy constraint.展开更多
基金Supported by the National Natural Science Foundation of China(Nos.U1133001,41030855,41376027)the National High Technology Research and Development Program of China(863 Program)(No.2013AA09A502)the NSFC-Shandong Joint Fund for Marine Science Research Centers(No.U1406401)
文摘During the observational period of our study,Typhoon Hagupit passed over the mooring site and induced strong near-inertial waves(NIWs),which provided an opportunity to investigate the interactions between internal tides(ITs) and NIWs. Based on the mooring data,we compared the current spectra during the typhoon period and non-typhoon period in the northern South China Sea,and found that the highfrequency waves(f D 1 and f D 2) were evident during the former. Moreover,the observations of the current revealed that f D1 and f D 2 occurred near the depth of strong vertical shear in the NIWs. In order to confirm the generation mechanism of f D1 and f D 2,we compared the positions of strong vertical shear in the NIWs and strong vertical velocity in the ITs. It was established that the vertical shear of the horizontal current of the NIWs and the vertical current of the ITs contributed to the generation of f D1 and f D 2.
基金Supported by the Project of China Ocean Mineral Resources R&D Association under Grant No DYXM-115-02-4-02National Natural Science Foundation of China under Grant Nos 40976011 and 40676022the Open Research Program at Key Laboratory of Tropic Marine Environment Dynamics.
文摘The driving mechanism of thermohaline circulation is still a controversial topic in physical oceanography.Classic theory is based on Stommel's two-box model under buoyancy constraint.Recently,Guan and Huang proposed a new viewpoint in the framework of energy constraint with a two-box model.We extend it to a three-box model,including the effect of wind-driven circulation.Using this simple model,we further study how ocean mixing impacts on thermohaline circulation under the energy constraint.
