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Report of Activities from Kiel Claus Böning · Arne Biastoch · Joachim Dengg

Report of Activities from Kiel Claus Böning · Arne Biastoch · Joachim Dengg Wonsun Park · Sabine Hüttl Joke Lübbecke · Markus Scheinert IFM-GEOMAR. Model Runs. ORCA05 CORE runs different restoring parameterizations different forcing variability different regional variability

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Report of Activities from Kiel Claus Böning · Arne Biastoch · Joachim Dengg

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  1. Report of Activities from Kiel Claus Böning · Arne Biastoch · Joachim Dengg Wonsun Park · Sabine Hüttl Joke Lübbecke · Markus Scheinert IFM-GEOMAR

  2. Model 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

  3. interannual wind variability only heat and freshwater variability only full forcing variability MOC and Related Large-scale Circulation • Mechanisms of MOC variability in response to key mechanisms/regions • Observability • Atlantic MOC Strength (36°N) in ORCA05 (Biastoch et. al, 2007) Subpolar gyre transport variability and its reverberation in the MOC (Böning et al., 2006) Arne Biastoch, Claus Böning, Joachim Dengg

  4. Influence 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

  5. Tropical 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

  6. Tropical 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

  7. ECHAM5/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

  8. Agulhas Stalled due to • Manpower  Open Postdoc Position! • Fundamental problems running AGRIF on NEC SX-8 Arne Biastoch

  9. Australian Activities Claus Böning

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