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CliC (NEG) Climate and Cryosphere. Recent, current and planned activities. Aike Beckmann 11.11.2005. I. RECENT ACTIVTIES. global climate studies with coupled ice-ocean models elements of interannual and interdecadal variability: ACWs, SAM, Antarctic Dipole, Weddell Polynya

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CliC (NEG) Climate and Cryosphere

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Clic neg climate and cryosphere

CliC (NEG)Climate and Cryosphere

Recent, current and planned activities

Aike Beckmann

11.11.2005


I recent activties

I. RECENT ACTIVTIES

  • global climate studies with coupled ice-ocean models

    • elements of interannual and interdecadal variability: ACWs, SAM, Antarctic Dipole, Weddell Polynya

      (AWI, UCL, NYU, TAMU)

    • climate change scenarios (coupled AIO)

      (UCL)

    • role of cryospheric components in Southern Ocean:

      - sea ice (AWI)

      - ice shelves (ISOMIP)

      - icebergs (BAS, AWI, more needed)


I recent activties cont d

I. RECENT ACTIVTIES cont’d

  • cryospheric processes and phenomena

    • parameterization of vertical mixing beneath sea ice

      (TAMU, AWI)

    • ice shelf-ocean interaction parameterization

      (AWI, UoH)

    • sensitivity of sea ice-ocean system to the hydrological cycle (ice shelf melting, precipitation) (Jap)

    • dynamical and thermodynamical effects of tides on sea ice (needed)

    • coupled A-I-O simulations of (coastal) polynyas

      (more needed, two-component studies exist: I-O: AWI, MPI, CSIRO; A-I: Aus)


I recent activties cont d1

I. RECENT ACTIVTIES cont’d

  • interdisciplinary, model development, etc.

    • tracer (CFCs, Helium, Tritium, Neon) studies: (AWI)

    • biology and biogeochemical cycles: (AWI; plans at UCL/ULB, ODU)

    • ice model development: (UCL, UoH)

    • paleo experiments A-I-O: (plans at UCL)


Ii current activities

II. CURRENT ACTIVITIES

  • Sponsoring of AOMIP

  • Sponsoring of SIMIP2

  • Coordination for IPY

    • to determine the present environmental status of the polar regions by quantifying their spatial and temporal variability

    • to quantify, and understand, past and present natural and anthropogenic change in the polar regions, in order to improve predictions

    • to advance our understanding of polar-global teleconnections, and of the processes controlling these interactions


Iii planned activities

IMPLEMENTATION OF CliC PROJECT AREAS (CPA)

CPA1: The terrestrial cryosphere and hydrometeorology of cold regions

CPA2: Glaciers, ice caps and ice sheets, and their relation to sea level

CPA3: The marine cryosphere and its interactions with high latitude oceans and atmosphere

CPA4: Links between the cryosphere and global climate

III: PLANNED ACTIVITIES


Cpa3 the marine cryosphere and its interactions with high latitude oceans and atmosphere

CPA3: The marine cryosphere and its interactions with high latitude oceans and atmosphere

What will be the nature of changes in sea-ice distribution and mass balance in both polar regions in response to climate change and variability?

  • Observational data sets and re-analyses of oceanographic and sea-ice quantities

  • Reduced uncertainties regarding past variability and trends in sea-ice coverage

  • Improved understanding of water mass transformation in polar regions

  • Improved model predictions of future changes to sea-ice cover in both hemispheres


Cpa4 links between the cryosphere and global climate

CPA4: Links between the cryosphere and global climate

What is the impact of changes in the cryosphere on the oceanic and atmospheric circulation? What is the likelihood of abrupt climate changes resulting from regime changes in the cryosphere?

  • Improved regional and global models of high latitude climate

  • Improved knowledge of cryosphere-related feedbacks to the rest of the climate system

  • Understanding of the cryospheric processes that underlie global tele-connectivity in climate

  • Better knowledge of abrupt climate changes associated with impacts of the cryosphere on the rest of the global climate system

  • Clearer view on the role of cryosphere in global water, energy and carbon cycles


Appendix iced

APPENDIX: ICED

ICED brings together climatologists, oceanographers, biogeochemists, ecosystem and fisheries scientists to generate unique Antarctic circumpolar databases and models

ICED is a natural descendant of recent global programmes with a Southern Ocean dimension:

  • the Joint Global Ocean Flux Study (JGOFS), which focused on the carbon cycle;

  • GLOBEC,

  • the World Ocean Circulation Experiment (WOCE);

  • a number of programmes of CCAMLR; and

  • the completed Biological Investigations of Marine Antarctic Systems and Stocks (BIOMASS) programme.


Appendix iced1

APPENDIX: ICED

ICED addresses three globally important questions:

  • how do climate processes affect the dynamics of circumpolar ecosystems?

  • how does ecosystem structure affect circumpolar ocean biogeochemical cycles?

  • how should ecosystem structure and dynamics be included in the development of sustainable approaches to managing exploitation?


The end

The End

  • Thank you.


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