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The Kiel runs [ORCA025-KAB001 and KAB002] Arne Biastoch IFM-GEOMAR

The Kiel runs [ORCA025-KAB001 and KAB002] Arne Biastoch IFM-GEOMAR. ORCA025-KAB001 and KAB002. KAB001: as G70, but… pure CORE forcing (except for river runoff, full temporal resolution, 1958-2004) 2 additional tracers: CFC-11 and SF6 (both initialized in 1959) no Katabatic winds

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The Kiel runs [ORCA025-KAB001 and KAB002] Arne Biastoch IFM-GEOMAR

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  1. The Kiel runs [ORCA025-KAB001 and KAB002] Arne Biastoch IFM-GEOMAR

  2. ORCA025-KAB001 and KAB002 KAB001: as G70, but… • pure CORE forcing (except for river runoff, full temporal resolution, 1958-2004) • 2 additional tracers: CFC-11 and SF6 (both initialized in 1959) • no Katabatic winds • “pragmatic approach”: weak SSS (300d / 10m) + polar 3D T/S restoring (180 d) • KAB002: as KAB001, but… • only 1985-2004 (based on KAB001) • strong SSS restoring (as G70, but withoutincreased restoring under sea ice) SSS 3D T/S:

  3. Atlantic Overturning 10 14 ORCA025-KAB001 (1995-2004) ORCA025-KAB002 (1995-2004) 16 18 ORCA025-G70 (1995-2004) FLAME 1/12°

  4. Overflow

  5. Labrador Sea Water

  6. Mixed Layer Depth

  7. Buoyancy Flux Thermal Buoyancy Flux KAB001 (Mar-1984) Thermal Buoyancy Flux G70 (Mar-1984) Haline Buoyancy Flux KAB001 (Mar-1984) Haline Buoyancy Flux G70 (Mar-1984)

  8. Buoyancy Flux Difference Thermal Buoyancy Flux G70 – KAB001 Total Buoyancy Flux G70 – KAB001 Haline Buoyancy Flux G70 – KAB001

  9. MOC Variability Bryden et al. (2005)

  10. MOC Variability

  11. Average Arctic T/S Average Temperature KAB001 Average Temperature KAB002 Average Temperature G70 Average Salinity KAB001 Average Salinity KAB002 Average Salinity G70

  12. Average Arctic Temperature compared to ORCA05 Weak 3D restoring (ORCA05-KAB041/KAB042) Strong SSS restoring(ORCA05-KAB034/KAB036) Weak 3D restoring (ORCA025-KAB001) Strong SSS restoring(ORCA025-KAB002)

  13. Average Arctic Salinity compared to ORCA05 Weak 3D restoring (ORCA05-KAB041/KAB042) Strong SSS restoring(ORCA05-KAB034/KAB036) Weak 3D restoring (ORCA025-KAB001) Strong SSS restoring(ORCA025-KAB002)

  14. Average Arctic Density compared to ORCA05 Weak 3D restoring (ORCA05-KAB041/KAB042) Strong SSS restoring(ORCA05-KAB034/KAB036) Weak 3D restoring (ORCA025-KAB001) Strong SSS restoring(ORCA025-KAB002)

  15. DKS and MOC Variability Dense transport (σ> 27.8) through Denmark StraitKAB001, KAB002, G70 Atlantic MOC Strength at 45NKAB001, KAB002, G70

  16. SSH-based Indices SSH Anomaly in Labrador Sea (cm)KAB001, KAB002, G70, AVISO data SSH Difference Subtropical – Subpolar Gyre (cm)KAB001, KAB002, G70, AVISO data

  17. Sea Ice Climatology Northern Hemisphere Ice VolumeKAB001, KAB002 Northern Hemisphere Ice AreaKAB001, KAB002, SMMI data Southern Hemisphere Ice VolumeKAB001, KAB002 Southern Hemisphere Ice AreaKAB001, KAB002, SMMI data

  18. Sea Ice Variability Northern Hemisphere Ice VolumeKAB001, KAB002 Northern Hemisphere Ice AreaKAB001, KAB002, SMMI data Southern Hemisphere Ice VolumeKAB001, KAB002 Southern Hemisphere Ice AreaKAB001, KAB002, SMMI data

  19. Drake Passage Transport

  20. ORCA05 no Agulhas Rings The Agulhas System Africa Agulhas Current ORCA025 Africa Agulhas Current Agulhas Rings

  21. Eddy Kinetic Energy KAB001 (2004 average, mean upper 50m) G70 (2004 average, mean upper 50m) KAB002 (2004 average, mean upper 50m) AVISO data (2004 average)

  22. Eddy Kinetic Energy KAB001 (2004 average, 450m depth) G70 (2004 average, 450m depth) KAB002 (2004 average, 450m depth)

  23. CFC-11 and SF6 CFC-11 Inventory KAB001 (Jul-2004) SF-6 Inventory KAB001 (Jul-2004)

  24. CFC-11 and SF6 Atmospheric History for CFC-11 and SF-6 Inventory of CFC-11 and SF-6 (KAB001 and KAB002) Total Fluxes of CFC-11 and SF-6 (KAB001)

  25. Atlantic Inventories of CFC-11 and SF6 % of Atmospheric SF-6 (Jul-1984) % of Atmospheric SF-6 (Jul-2004) % of Atmospheric CFC-11 (Jul-1984) % of Atmospheric CFC-11 (Jul-2004)

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