Title: The role of mesoscale processes on the interoceanic exchange
1Report of Activities from Kiel Claus Böning
Arne Biastoch Joachim Dengg Wonsun Park
Sabine Hüttl Joke Lübbecke Markus
Scheinert IFM-GEOMAR
2Model Runs
- ORCA05 CORE runs
- different restoring parameterizations
- different forcing variability
- different regional variability
- ORCA025 CORE runs
- KAB001 1958-2004 with polar 3D restoring and 2
tracers (CFC-11, SF6) - KAB002 1985-2004 with strong polar SSS restoring
- Data stored on DODS-Server in Kiel
- Todo authentification from outside, LAS
3MOC and Related Large-scale Circulation
- Mechanisms of MOC variability in response to key
mechanisms/regions - Observability
Subpolar gyre transport variability and its
reverberation in the MOC (Böning et al., 2006)
- Atlantic MOC Strength (36N) in ORCA05 (Biastoch
et. al, 2007)
Arne Biastoch, Claus Böning, Joachim Dengg
4Influence of Freshwater on Subpolar North Atlantic
- Freshwater balance in arctic and subpolar regions
- Great Salinity Anomaly events in CORE runs
- Freshwater balance in ORCA05
- Freshwater fluxes in 50-yr CORE runs
Markus Scheinert
5Tropical Atlantic
- Mean pathways subtropics-tropics
- Sources and role of the zonal current bands
- Connections to upwellingin the eastern tropical
Atlantic - Interannual to decadal variability in the topical
Atlantic - Influence and role of the subtropical-tropical
cell (STC) - Connections to MOC variability in the North
Atlantic
Sabine Hüttl
6Tropical Pacific
- Subtropical cells (ORCA05, ORCA025)
- Western boundary vs. interior transport
- Impact on SST
- Variability on interannual to decadal time scales
- WBC vs. interior in ORCA05
- Lagrangian analysis of ORCA05 data focusing on
pathways into STCs (colloboration with K. Döös,
Stockholm)
Joke Lübbecke
7ECHAM5/NEMO coupled model
- KCM prototype with T31/ORCA2 resolution
- Two 500-yr simulations with difference atmosphere
configurations - Stable climate
- Different ENSO dynamics
- Reasonable sea ice distribution
- Low MOC
- Cold bias over North Atlantic
Wonsun Park, Noel Keenlyside, Mojib Latif, Rene
Redler
8Agulhas
- Stalled due to
- Manpower ? Open Postdoc Position!
- Fundamental problems running AGRIF on NEC SX-8
Arne Biastoch
9Australian Activities
Claus Böning