What is the role of finescale processes in a highly stratified current system?
The Subtropical Countercurrent (STCC) in the North Western Pacific is baroclinically unstable and produces energetic eddies. The horizontal gradients of SSH indicate the strength of this current. This information needs to be integrated with in situ data in order to understand energy pathways and heat balance in the North Pacific.
The North West Pacific campaign scientific aimed to investigate this region as a case study of the role of submesoscale motions in the ocean energy pathway and in vertical heat transport, understand the impact of air-sea interactions on submesoscale dynamics, and provided a benchmark for validating Sea Surface Height observations by SWOT.
An in situ observing system was deployed on the abyssal plain along the SWOT ground track to collect data during the SWOT fast sampling phase. Three moorings were deployed using the Research Vessel “Dongfanghong 3” and maintained in place for at least one year. They were be put at the vertices of a triangle, at about 10 km one from the other and will collect hydrographic data over the upper 3000 m and velocity data above the main thermocline. This mooring system were complemented by underwater and wave gliders that travel in between.
This campaign allowed a better understanding the role of finescale processes in a highly stratified current system and gave insight of current ocean state in this region.
Principal investigators: Zhao Jing (jingzhao@ouc.edu.cn), Ge Chen (gechen@ouc.edu.cn), Zhiwei Zhang (zzw330@ouc.edu.cn), Zhaohui Chen (chenzhaohui@ouc.edu.cn)
Institutes implicated in the campaign: Ocean University of China and Pilot National Laboratory for Marine Science and Technology, Qingdao, China
Contact point for the study site: Zhao Jing (jingzhao@ouc.edu.cn)
