CLIVAR/CliC/SCAR Southern Ocean Region Implementation Panel

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Presentation transcript:

CLIVAR/CliC/SCAR Southern Ocean Region Implementation Panel Members Ian Renfrew - co-chair Kevin Speer - co-chair Aike Beckmann Yasushi Fukumachi Hugues Goosse Niki Gruber Christian Hass Ex-Officio members: Eberhard Fahrbach Alex Orsi Doug Martinson Alberto Naveira Garabato Steve Rintoul Sabrina Speich Dave Thompson Michiel van den Broeke Mike Sparrow, IPO

Modes of SH Climate Variability Scott Polar Research Institute, Cambridge UK, June 2005 http://www.clivar.org/organization/southern/Modes_meet.html D. Thompson: The mean state of the southern hemisphere atmosphere N. Gillett: Human influences on the southern annular mode G Marshall: Southern hemisphere annular mode indices I. Wainer: Southern Ocean Modes of Climate Variability - Representation in models and their Impact on Regional Climate D. Bromwich: Decadal variability of the Antarctic-Enso teleconnection and its association with the Southern Annular Mode X. Yuan: The impact of high latitude climate modes on Antarctic sea ice J. Turner: Links between the Antarctic and the rest of the climate system P. Mayewski: Calibrated ice core derived climate proxies M. Meredith: Circumpolar ocean transport response to forcing by the Southern Annular Mode A. Beckmann: Ice-ocean modes in the Antarctic marginal seas M. Drinkwater: Modes of Antarctic Sea Ice Drift Variability, and their connection to atmosphere-ocean modes

Modes of SH Climate Variability M. Van den Broeke: The semi-annual oscillation in the southern hemisphere and its influence on temperature and sea ice A. Stoessel: The role of Southern Ocean sea ice and convection on the mean state and variability of the global deep ocean A. Orsi and S. Osterhus: Antarctic Bottom Water variability and sensitivity to change. S. Stark: Southern Ocean variability and climate change in HadCM3 Results reported in next issue of CLIVAR Exchanges.

Status of Southern Ocean Observations

MAY 2004 NOV 2005

Climate of Antarctica and the Southern Ocean (CASO) S. Rintoul, E. Fahrbach and I. Renfrew on behalf of the CLIVAR/CliC/SCAR Southern Ocean Panel

Climate research themes for the IPY Antarctica and the Southern Ocean in the global water cycle Southern hemisphere teleconnections Climate processes at the Antarctic continental margin Climate – ecosystem – biogeochemistry interactions in the Southern Ocean Records of past Antarctic climate variability and change

Tackling key unknowns: CASO will: Obtain the first circumpolar snapshot of the Southern Ocean, including physical, ecological and biogeochemical properties. Measure the circumpolar extent and thickness of Antarctic sea ice through an annual cycle for the first time. Observe the sub-ice ocean circulation, water mass properties and biological distributions

IPY Observing System: Synoptic multi-disciplinary transects Sea ice volume Enhanced sea ice drifter array Ocean circulation under sea ice Enhanced Southern Ocean Argo Enhanced meteorological measurements Ice cores from high accumulation rate coastal sites Process studies

SASSI Synoptic Antarctic Shelf-Slope Interactions Study

Recommendations: Maintain a focus on the Southern Ocean (thank you for an excellent workshop) Get involved in IPY-related modelling studies “What if….?” experiments Beware of single-hemisphere expts

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