Abstract's details
Monitoring open sea and coastal ocean dynamics in the Baltic Sea and North East Atlantic
CoAuthors
Event: 2019 Ocean Surface Topography Science Team Meeting
Session: Science III: Mesoscale and sub-mesoscale oceanography
Presentation type: Type Poster
Contribution: not provided
Abstract:
The proposed activity investigates the ocean processes at different scales in coastal and estuarine regions. The approach includes assessing the quality of real observations against model and in-situ data and performing SWOT simulations at selected locations in preparation to the SWOT data analysis. Along-track altimeter data are from Delay Doppler Altimetry and conventional altimetry missions for the interval 2010-2018.
The modelling system used is based on the regional coupled, ocean, wave and atmosphere model system, which is part of the Geesthacht COAstal model SysTem (GCOAST). implemented in the Atlantic, North Sea, Baltic Sea and Danish Straits, given by structured (NEMO-WAM) and unstructured (SCHISM-WWM) grid coupled models capable to resolve the complex ocean dynamics at the regional and coastal scales. The focus of the coupled system is on the nonlinear feedback (e.g. between the ocean circulation and wind–waves), which can no longer be ignored, in particular in the coastal zone where its role seems to be dominant. The synergy of the GCOAST coastal modelling system with both in-situ and remote sensing observations will be demonstrated.
First investigations will focus mesoscale structures and upwelling event in the Danish Straits and Southern-Western Baltic Sea. Two long term observational sites (Fehmarn Belt, Boknis Eck) located in the cal/val SWOT Pass 3 provide time series of full depth water currents and sea level/bottom pressure records. Wind (local, central Baltic), seiches, run-off variability, and tides all impact the sea-level at different spatial and temporal scales. The topography is characterized by a central ridge that levels out towards the coasts and can act as an amplifier for sea level signals. Additionally, observational data from the Copernicus Marine Environment Monitoring System (CMEMS) over the area of interest will be utilized.
Other potential sites along SWOT Pass 3 will be investigated in order to determine an optimal sampling during the cal/val mission. A second target will be most likely the Elbe estuary, looking at the time variability of hydrodynamics in an estuarine macrotidal system.
The study is part of the SWOT Early Adopter activities at Uni-Bonn and HZG. This region of study will be covered by SWOT in the 1 day repeat phase.
The modelling system used is based on the regional coupled, ocean, wave and atmosphere model system, which is part of the Geesthacht COAstal model SysTem (GCOAST). implemented in the Atlantic, North Sea, Baltic Sea and Danish Straits, given by structured (NEMO-WAM) and unstructured (SCHISM-WWM) grid coupled models capable to resolve the complex ocean dynamics at the regional and coastal scales. The focus of the coupled system is on the nonlinear feedback (e.g. between the ocean circulation and wind–waves), which can no longer be ignored, in particular in the coastal zone where its role seems to be dominant. The synergy of the GCOAST coastal modelling system with both in-situ and remote sensing observations will be demonstrated.
First investigations will focus mesoscale structures and upwelling event in the Danish Straits and Southern-Western Baltic Sea. Two long term observational sites (Fehmarn Belt, Boknis Eck) located in the cal/val SWOT Pass 3 provide time series of full depth water currents and sea level/bottom pressure records. Wind (local, central Baltic), seiches, run-off variability, and tides all impact the sea-level at different spatial and temporal scales. The topography is characterized by a central ridge that levels out towards the coasts and can act as an amplifier for sea level signals. Additionally, observational data from the Copernicus Marine Environment Monitoring System (CMEMS) over the area of interest will be utilized.
Other potential sites along SWOT Pass 3 will be investigated in order to determine an optimal sampling during the cal/val mission. A second target will be most likely the Elbe estuary, looking at the time variability of hydrodynamics in an estuarine macrotidal system.
The study is part of the SWOT Early Adopter activities at Uni-Bonn and HZG. This region of study will be covered by SWOT in the 1 day repeat phase.