Report on Coastal and Shelf Seas Modeling (EuroGOOS) Working Group activities

Transcription

1 Report on Coastal and Shelf Seas Modeling (EuroGOOS) Working Group activities P. Oddo (1) and O.K. Leth (2) 1-Istituto Nazionale di Geofisica e Vulcanologia, Italy 2-Danish Meteorological Institute, Danmark

2 OUTLINE Motivation and scope of the group (Terms of Reference) The Members Out coming of the first meeting Progresses During the last year (the shared document) Conclusions

3 WG Motivation EuroGOOS is an Association of Agencies, founded in 1994, to further the goals of GOOS, and in particular the development of Operational Oceanography in the European Sea areas and adjacent oceans. EuroGOOS is established with full recognition of the importance of existing systems in research and operational oceanography in Europe at national and European scales. EuroGOOS priorities Priority 5: Contribute to the further development of GOOS, in particular by taking the lead in advancing Coastal GOOS Priority 8: Work towards involving all European coastal states, through their operational oceanographic institutions, in EuroGOOS work

4 WG Terms of Reference The EuroGOOS Coastal and Shelf seas Modeling Group main objective is to establish a network of European experts from different coastal oceanography disciplines to discuss, promote and coordinate Coastal Ocean modeling (monitoring) activities in Europe. The Coastal Modeling-WG (should!) meets on yearly basis. Next meeting in Lisbon during the EuroGoos conf.?

5 Terms of Reference The main objectives of the COSMO-WG are: maintain a link between international efforts (with particular attention to the GODAE OceanView COSS-TT) and ongoing coastal modelling activities in Europe; maintain a continuous link between global/regional and European coastal ocean operational activities at European Level, identifying the requirements to fill the gap between the different scales for a proper downscaling; monitor European research activities associated with coastal and shelf seas; promote actions aimed at coordinating research associated with coastal and shelf seas activities; address the issue of model validations and routine observations in coastal areas; identify coastal modelling requirements in terms of numeric and codes; address the issue of data assimilation in coastal areas; identify common protocols in coastal ocean model nesting and define a strategy for future works; create a roundtable of recognized experts from different coastal ocean disciplines (physical and biogeochemical numerical modelling, data assimilation, remote and in-situ observations, validation and operational activities);

6 List of experts Round table of recognized experts from different coastal ocean disciplines (physical and biogeochemical numerical modelling, data assimilation, remote and in-situ observations, validation and operational activities). Chair: Paolo Oddo (INGV, Italy), Ole Krarup Leth (DMI, Denmark) Ocean Numerical modeling: Rachid Benshila (LOCEAN IPSL, France) NEMO, Jason Holt (NOC), Eric Deleersnijder (IMMC, Belgium), Tomas Newman (BSRIW, Germany), G: Sannino Global/Regional Operational Oceanography: John Siddorn (UK Met Office, UK) Other international groups: Pierre De Mey (LEGOS, France), GODAE COSS-TT Coastal Observations: Joaquin Tintoré (IMEDEA, Spain) Biogeochemistry: Letizia Tedesco (SYKE, Finland) Coastal Operational Applications and Services: Gennady Korotaev (MHI, Ukraine) Nesting: Paolo Oddo (INGV, Italy) Relevant Coastal physical processes:frank Dumas (IFREMER,France), Emil Stanev (HZG, Germany) Sea ice: Lars Axell (SMHI, Sweden) Remote Sensing for coast: Calire Dufau (CLS, France) Data Assimilation in coastal areas: Srdjan Dobricic (CMCC, Italy), Laurent Bertino (NERSC)

7 Geographical Distribution INGV,CMCC Italy DMI, Denmark LOCEAN, France UK-Meto, UK Legos/CLS, France IMEDEA, Spain SYKE, Finland DHI, Ukraine CNRS, France SMHI, Sweden NERSC, Norway NOC, UK IMMC, Belgium HGZ, BSRIW Germany

8 1 EuroGOOS Coastal Modeling WG meeting First Goal: Shared Document. We start identifying a set of relevant (key) physical processes that can serve for the characterization of the "Coastal Ocean State". On the base of these processes we select some test areas (representing the European Coastal Ocean) and the sub-set (or the entire set) of processes typical of each area. Later define the specific strategy to address all the single issues (data assimilation, validation protocols, satellite data needed, model requirements, LOBC approach, downscaling)

9 The Ocean State and the MFSD The MSFD aims to achieve Good Environmental Status of the EU's marine waters by Environmental status will be assessed on the basis of 11 qualitative descriptors, considering environmental state, pressures and impacts on marine ecosystems. The need for knowledge-based adaptive management is also a key principle. With regard to the protection of the marine environment, where there are still many uncertainties, this need is of particular importance. By requiring an initial assessment and monitoring programmes, the MSFD contributes to the global review of the state of the marine environment. For what concerns the coastal areas MSFD suggest the following Physical and chemical factors that determine the characteristics of the coastal water and hence the biological community structure and composition: current velocity; wave exposure; mean water temperature; mixing characteristics; turbidity; retention time; mean substratum composition; water temperature range. So we should be able to model with good accuracy those characteristics of the coastal areas.

10 Set of relevant physical processes Scales / Areas Relevant Processes Events All Mesoscale submesoscale Transport: wind or buoyancy driven Tides Tidal mixing Inertial mixing Interaction Baroclinicity + bathymetry Light penetration Biogeochemical Gravity Waves / trapped waves / internal waves; wave breaking Air sea processes Horizontal and Vertical Turbulence Instabilities Upwelling / Downwelling / storm surge Residual transport Anoxia / algal bloom Sea level set up Water Mass Formation and spreading forward and inverse turbolence cascade Comments additional info Straits outflow Water column constituent Details needed Charnock Coeff Air-Sea processes parameterizzations by eddies and shear straining Bottom BL Friction Sea bed type Shelf Slope currents Horizontal and Vertical ROFI Turbulence/ Instabilities River Plume Sediment dynamics Sinking and transport

11 Selected Areas Rivers Wind Tide Characteristics Sea- Ice Others / Dynamics N.Adriatic X X X Large buoyancy Gradients Non local water masses German Bight X X Estuarine Turbidity maximum / Kelvin waves / Inverse Estuarine / Wave Current interaction / Spitzberg X X Steep Topography X Skagerrak La Manche and Bay of Biscay X X X Irish Sea X X X Very steep topography Two Layer ROFI flow/ Large density gradients Large tidal currents and heights Amphidromic point near the coast Internal wave generation Complex front at western end Cold pool gyre/ strong density gradients and temperature inversion.tidal straining, heaps circulation Shelf S.of Crimea X synoptic coastal upwelling/downwelling. X Temperature / Inversion Complex residual flows due to double coastline and Dover Straits restrictions Complex topology restricts flow into/out off region. Many regions of mudflats (Liv Bay etc.) Coastal Trapped waves/ Positive negative water setup NW Shelf BS X episodic algae bloom events / Subduction fresh water discharge is crucial for the vertical distribution of oxygen (hypoxia) Bosporous Complex Geometry Slope Currents / Vertical horizontal Mixing Baltic X X Balearic Sea X X High-saline bottom inflow events / Anoxic bottom-water (ecosystem) / Near-zone mixing (fresh water; maybe under ROFI) / High-saline bottom inflow events Slope currents interactions. Meso&submeso scale dynamics, eddy-mean flows interactions.. Water Masses formation and spreading. X Small-scale processes (deformation radius in open Baltic waters; in and transition zone) eddy resolving important Meteo-tsunamis, atmosphere-ocean trapped resonant waves., Runoffs, complex topography, vertical mixing, intense episodes/extreme events, and ecosystem response. Shelf/open ocean exchanges, instabilities, canyons.

12 The specific Strategy for common issues River Runoff How river runoff is actually parameterized / represented in numerical ocean model: Natural surface boundary condition / Only salt / Lateral open boundary condition / Salinity / Temperature / runoff What are the limit of present available implementations/parameterizations. Runoff data and need to couple with external module/model. InSitu : Salinity profiles and section / Satellite: SMOS, ocean color, SST, Altimetry Tide and related processes (mixing) Tide using lateral open boundary conditions (Flather) and/or geopotential (the limits of applicability of first).detail of how the tides are treated in NEMO and other models. The issue to be solved is the induced vertical mixing and residual transport Examples (Gibraltar) InSitu : Tide Gauges, T,S profiles / Satellite: Altimetry Geometry (horizontal,i.e. straits channels)vertical slopebathymetry.

13 Conclusions European Coastal Seas are very diverse and cover a wide range of processes / dynamics The gap between results provided by operational coastal models and the needs for a effective coastal zone managements is still significant There are common issues to be addressed from the modelling point of view (ROFI, Tides, Geometry)

14 Conclusions The main objectives of the COSMO-WG are: maintain a link between international efforts (with particular attention to the GODAE OceanView Cosatal Ocean and Shelf Seas Task Team) and ongoing coastal modelling activities in Europe; maintain a continuous link between global/regional and European coastal ocean operational activities at European Level, identifying the requirements to fill the gap between the different scales for a proper downscaling; monitor European research activities associated with coastal and shelf seas; promote actions aimed at coordinating research associated with coastal and shelf seas activities; address the issue of model validations and routine observations in coastal areas; identify coastal modelling requirements in terms of numeric and codes; address the issue of data assimilation in coastal areas; identify common protocols in coastal ocean model nesting and define a strategy for future works; create a roundtable of recognized experts from different coastal ocean disciplines (physical and biogeochemical numerical modelling, data assimilation, remote and in-situ observations, validation and operational activities);

15 Next Steps/Suggestions/Discussion During this year: Second WG meeting; Finalize the document; Review the ToR on the base of the new strategic view. If needed change the approach: from WG to EuroGoos.vs. From EuroGoos to WG Coordination /Inputs with/from other EuroGoos WGs