a coupled model system for shelf seas and marginal seas hans burchard (iow) and many others
TRANSCRIPT
A coupled model system
for shelf seas and marginal seas
Hans Burchard (IOW) and many others
Motivation
Figure SPM.5
Climate change Eutrophication
Constructions Fishery
IPCC BACC
Baltic Assessment for Climate Change
The Baltic Sea estuarine circulation
Reissmann et al., 2009
Exchange flow
Inflows
Boundary and internal mixing
Air-sea interaction
Hydrography of upper mixed layer in Central Baltic Sea
Data: Volker Fiekas (FWG)
Micro-structure-profiles
Burchard et al. (2006)
Biogeochemistry in the upper Central Baltic Sea
Zooplankton migration in Central Baltic Sea
Coupling waves and currents
GETM
Current velocities at coastal station (Duck‘94)
Cross-shore Along-shore
Moghimi et al. (2013)
Implementation of Marine Strategy Framework Directive
Questions about complex interactions
in a variable coastal environment require an integrative model
concept.
Modular System for Shelves and Coasts (MoSSCo)
atmosphericchemistry
atmosphericphysics
benthic geoecology
benthic biogeochemistry
cohesivesediments adaptive
ecosystem& element
cycles
waves
riverdischarge
oceanphysics
oceanBGC
water physics
Modular System for Shelves and Coasts (MoSSCo)
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 CSTMShttp://woodshole.er.usgs.gov/project-
pages/sediment-transport/
Modeling System
COAWSTCoupled Ocean – Atmosphere – Wave – Sediment Transport
Modeling System to investigate the impacts of storms on coastal environments.
svn 455
v 2.6.0
v 3.4
v 40.91
Modelsetup
OCEAN
ATMOSPHERE
WAVE
us, vs, h, bath, Z0
Hwave, Lmwave, Lpwave, Dwave,Tpsurf, Tmbott, Qb, Dissbot, Disssurf, Disswcap, Ubot
MCT
Uwind, V
wind, P
atm
, RH, T
air,
cloud
, rain
, eva
p, S
Wra
d, L
wrad
LH, H
FX, Ustr
ess,
Vstres
s
SST
MCT
Uwind , V
wind
Hwave , L
pwave ,
Tpsurf ,
MCT
WRF wind speed
Longitude
Latit
ude
ROMS SST SWAN Hsig
SEDIMENT
SCRIP - grid interpolation
Atmosphere model provides heat flux to cover entire ocean grid. SCRIP interpolations weights needed to remap data fields.
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.
http://climate.lanl.gov/Software/SCRIP/
Flux conservativeremapping scheme
Ocean grid5 km
Atm Grid6 km
HFLX10 GFS data
SST
Nor’Ida Nov 2009
Bodie Island, NC
Wallops Island, VA
L
L
H
8th Nov
9th Nov
10thNov
11thNov
13thNov
wind speed23 m/s (50 mph)
Before
Before
After
Afterhttp://
coastal.er.usgs.gov/hurricanes/norida/
Wav
e h
eigh
ts (m
)
wind speed40 m/s (90 mph)
WRF
WINDSWRF + ROMS + SWAN m/sWRF + ROMS
S
0.850.780.89
DATAWRF
WRF+ROMSWRF+ROMS+SWAN
Reduced wind speed with waves coupling.
WAVESWRF
WRF + SST +OOST WRF + SST
DATAWRF
WRF+ROMSWRF+ROMS+SWAN
WRF + ROMS + SWANWRF + ROMSWRF
S
0.800.740.88
m
Reduced waves with waves coupling.