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A coupled model system f or shelf seas and marginal seas Hans Burchard (IOW) and many others. Motivation. Climate change. Eutrophication. IPCC BACC. Baltic Assessment for Climate Change. Constructions. Fishery. The B altic Sea estuarine circulation. Air- sea interaction.

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A coupled model system

for shelf seas and marginal seas

Hans Burchard (IOW) and many others


Motivation

Climatechange

Eutrophication

IPCC BACC

Baltic Assessmentfor

Climate Change

Constructions

Fishery


The Baltic Seaestuarinecirculation

Air-seainteraction

Exchange flow

Inflows

Boundaryand

internalmixing

Reissmann et al., 2009


Hydrographyofuppermixedlayer in Central Baltic Sea


Micro-

structure-

profiles

Data: Volker Fiekas (FWG)


Biogeochemistry

in theupper

Central Baltic Sea

Burchard et al. (2006)


Zooplankton migration in Central Baltic Sea


Couplingwavesandcurrents

GETM

Cross-shore

Along-shore

Currentvelocitiesatcoastalstation (Duck‘94)

Moghimi et al. (2013)


Modular System forShelvesandCoasts (MoSSCo)

Implementation of Marine Strategy Framework Directive

Questions about

complex interactions

in a variable coastal environment

require an integrative model concept.


Modular System forShelvesandCoasts (MoSSCo)

atmospheric

physics

atmosphericchemistry

waves

water physics

riverdischarge

cohesivesediments

adaptive

ecosystem& elementcycles

oceanphysics

oceanBGC

benthic

biogeochemistry

benthic geoecology


Coawst modeling system

C = Coupled MCT http://www-unix.mcs.anl.gov/mct/

O =Ocean ROMS http://www.myroms.org/

A =Atmosphere WRF http://www.wrf-model.org/

W =Wave SWANhttp://vlm089.citg.tudelft.nl/swan

ST =Sediment Transport CSTMS http://woodshole.er.usgs.gov/project-

pages/sediment-transport/

Modeling System

COAWST Modeling System

COAWST

Coupled Ocean – Atmosphere – Wave – Sediment Transport

Modeling System to investigate the impacts of storms on coastal environments.

v 2.6.0

svn 455

v 3.4

v 40.91


Model setup

MCT

MCT

ATMOSPHERE

Modelsetup

Hwave, Lpwave, Tpsurf,

Latitude

Uwind, Vwind, Patm, RH, Tair,

cloud, rain, evap, SWrad, Lwrad

LH, HFX, Ustress, Vstress

SST

WRF wind speed

Longitude

Uwind, Vwind

Hwave, Lmwave, Lpwave, Dwave,

Tpsurf, Tmbott, Qb,

Dissbot, Disssurf, Disswcap,

Ubot

ROMS SST

MCT

SWAN Hsig

us, vs, h, bath, Z0

WAVE

OCEAN

SEDIMENT


Scrip grid interpolation
SCRIP - grid interpolation

http://climate.lanl.gov/Software/SCRIP/

Ocean grid

5 km

Atm Grid

6 km

10 GFS data

HFLX

SST

Ocean model provides higher resolution and coupled response of SST to atmosphere. But the ocean grid is limited in spatial coverage so atmosphere model must combine data from different sources, which can create a discontinuity in the forcing.

Atmosphere model provides heat flux to cover entire ocean grid. SCRIP interpolations weights needed to remap data fields.

Flux conservative

remapping scheme


Nor ida nov 2009
Nor’Ida Nov 2009

wind speed

23 m/s (50 mph)

H

Wave heights (m)

Bodie Island, NC

13thNov

L

L

11thNov

10thNov

Wallops Island, VA

Before

9th Nov

8th Nov

Before

wind speed

40 m/s (90 mph)

After

http://coastal.er.usgs.gov/hurricanes/norida/

After


WINDS

WRF + ROMS

WRF

DATA

WRF

WRF+ROMS

WRF+ROMS+SWAN

WRF + ROMS + SWAN

Reduced wind speed with waves coupling.

m/s

S

0.85

0.78

0.89


WAVES

WRF

WRF + SST

WRF + SST +OOST

m

WRF + ROMS + SWAN

WRF

WRF + ROMS

DATA

WRF

WRF+ROMS

WRF+ROMS+SWAN

Reduced waves with waves coupling.

S

0.80

0.74

0.88


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