dynamics of dense overflows – detailed studies from the western baltic sea hans burchard 1, hans...
Post on 15-Jan-2016
217 views
TRANSCRIPT
![Page 1: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/1.jpg)
Dynamics of dense overflows – detailed studies from the Western Baltic Sea
Hans Burchard1, Hans Ulrich Lass1, Lars Umlauf1, Karsten Bolding2, Frank Janssen3, Volker Mohrholz1, Hannes Rennau1
1. Baltic Sea Research Institute Warnemünde
2. Bolding & Burchard Hydrodynamics3. Federal Maritime and Hydrographic Agency
![Page 2: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/2.jpg)
Oder: Wie Jürgen Sellschopp das Modellieren schätzen lernte.
Das kriegen die niemodelliert !
![Page 3: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/3.jpg)
For the investigation of this problem, the international project cluster QuantAS(Quantification of water mass transformation processes in the Akona Sea) was set up.
Graphics: Jan Donath (IOW)
Photo: Frank Richter (Uni Rostock) © NDR
Uli Lass (2002):
„Wind turbine foundationsmay mix up dense bottom currents.“
![Page 4: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/4.jpg)
Establishing the QuantAS Consortium in May 2003
...Treppenabsatzfoto Nr. 257 …
![Page 5: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/5.jpg)
Interessantes Projekt auch aus der Sicht der FWG.
Wir könnten für Anfang 2004 mit Schiffszeit
dabei sein.
![Page 6: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/6.jpg)
Baltic Sea bathymetry
Entire Baltic
Belt Sea / Western Baltic
![Page 7: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/7.jpg)
Western Baltic Sea: Bathymetry
Darss Sill: 19 m
+
Drogden Sill: 8 m
+MARNET (IOW/BSH)
Farvandsvæsenet
![Page 8: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/8.jpg)
baroclinic barotropic
Inflows over Drogden Sill
surface
bottom
Graphics: Frank Janssen (BSH)
![Page 9: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/9.jpg)
Where does the Sound plume go ?
?
![Page 10: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/10.jpg)
x
y
U-V
Dense bottom currents:
Balance between rotation,friction and pressure gradient
![Page 11: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/11.jpg)
GETM is a 3D numerical model for estuarine,coastal and shelf sea hydrodynamics with applications to the
• Tidal Elbe • Wadden Sea• Limfjord• Lake of Geneva, • Western Baltic Sea,• North Sea – Baltic Sea system• …
![Page 12: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/12.jpg)
Lass die doch modellieren. Wir hocken lieber im
Container und pflegen unsere
Feldmessungen.
![Page 13: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/13.jpg)
5 days
15 days
31 days
Sound lock-exchange experiment with GETM
Bottom salinity: 8 – 25 psu
Kann das denn
angehen ?
![Page 14: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/14.jpg)
Searching for the plume
![Page 15: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/15.jpg)
Plume coming down from the Sound (Feb‘ 2004)
![Page 16: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/16.jpg)
Plume passing Kriegers Flak (Feb‘ 2004)
![Page 17: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/17.jpg)
Profiles through plumenorth of Kriegers Flak
(Feb‘ 2004)
![Page 18: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/18.jpg)
Realistic simulation of the Februar 2004 plume
Baltic Sea model:Baltic Sea MOM-3.1 model 3 nm horizontal resolution77 vertical (geopotential) grid layersMeteo forcing from ECWMF Reanalysis Project ERA40 (until August 2002)German Weather Service Global Model with a resolution (from September 2002).Boundary conditions stored for elevation, temperature and salinity at 57 deg 30‘ N (Kattegat) and 16 deg 30‘ E (east of Bornholm Sea)
Western Baltic Sea model: Sim-time: September 1, 2003 - May 1, 2004Forced by German Weather Service Local Model (resolution: 7 km and 3 hours)Lateral boundary conditions from Baltic Sea model Resolution: 1/2 nm in the horizontal, 50 general vertical coordinate layersTime step was 10 s for barotropic and 300 s for baroclinic mode.
![Page 19: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/19.jpg)
Domain decomposition for Western Baltic Sea model
![Page 20: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/20.jpg)
Bottom salinity in Arkona Sea
![Page 21: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/21.jpg)
Salt transport across Drogden Sill
![Page 22: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/22.jpg)
Model validation: Darss Sill
![Page 23: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/23.jpg)
Model validation: Arkona Buoy
![Page 24: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/24.jpg)
Feb. 2004 section
across Kriegers Flak
![Page 25: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/25.jpg)
November 2005: More detailed QuantAS observations
![Page 26: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/26.jpg)
Nov 2005: Velocity structure of dense bottom current
Ship A:TL-ADCP
Ship B: Microstructure
View
1 km
Flow
Eastcomp.
Northcomp.
Can we explain the flow structure ?
![Page 27: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/27.jpg)
T2:Turbulence Measurements
enhanced turbulencein down-welling region
interfacial turbulence
quiet core
BBL Turbulence
21
3
N
Lo
Ozmidov Scale:
Ozmidov Scale
Dissipation Rate
![Page 28: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/28.jpg)
GETM 2DV Slice Model: Transverse gravity current structure
![Page 29: Dynamics of dense overflows – detailed studies from the Western Baltic Sea Hans Burchard 1, Hans Ulrich Lass 1, Lars Umlauf 1, Karsten Bolding 2, Frank](https://reader036.vdocuments.mx/reader036/viewer/2022062518/56649d7e5503460f94a60904/html5/thumbnails/29.jpg)
Na, Jürgen, war das nicht ne schöne Zeit,
damals 03 – 07 ?Ach ja … und
aus dem Modell konnte man ja so richtig was
lernen …
… dann kann ich
ja in Rente
gehen …