antarctic climate evolution (ace) an international research initiative to study the climate and...
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ANTARCTICCLIMATE
EVOLUTION(ACE)
An international research initiative to studythe climate and glacial history of Antarctica
through palaeoclimate and ice-sheet modelingintegrated with the geological record.
ANTARCTIC CLIMATE EVOLUTION
Understand scale & rapidity ofice sheet & sea iceresponse to climate forcing
• sea level change
• change in heat sinks/insulators
Modeling ice-sheet behaviour in response tochanges in:
• climate• ice cores• sedimentary facies• seismic data
• palaeooceanographic conditions• palaeoecology• climate proxies in ocean sediments
• palaeogeography• recorded in landscape evolution
Build hypotheses, examinable through modeling,of likely response to future global change
Datasets contributing to ACE programme
History of climate change:Cenozoic stratigraphic record
PROXIMALSEDIMENTARYRECORDS
PROXY-RECORDS
GLACIALEUSTASY
ANTARCTICCRYO-CYCLOSTRATIGRAPHY
Deep Sea OxygenIsotope Record
Low LatitudeSequence
Stratigraphy
LA
TIT
UD
E
HIGH
LOW
SHALDRIL:• Ship-deployed coring - few 100 meter
records from continental shelves• Test cruise planned Feb-March 2005
Planning since 1994
ANDRILL
INVESTIGATING ANTARCTICA
'S R
OLE IN CENOZOIC TO RECENT GLOBAL EN
VIRONMENTAL CHAN
GE
STRATIGRAPHIC D
RILLING for CLIMATIC and TECTONIC
HIS
TORY
McMurdo Sound Portfolio
GERMAN
ITALY NEW
ZEALAND UNITED KING
DOM UNITED STATES
ANDRILL: Stratigraphic records from drilling on sea ice / ice shelf platforms
• Italy• Germany• New Zealand• USA
Drilling:2006 & 2007
Potential ANDRILL Portfolios
AMERY
ICE SHELF
ROSSICE SHELF
WEDDELLSEA MARGIN
ANTARCTICPENINSULA
Initiation of East Antarctic glaciation: coupled GCM-ice sheet model
(from DeConto and Pollard, 2003, Nature)
ACE will:
Promote planning and collaboration for acquisition of data at critical locations indicatedby modeling results
Compile and evaluate geological records ofclimate change across continent
Apply latest numerical modeling schemes toassess response to climate forcings
Publish volumes from theme-based symposiaand workshops
Modeling Themes:• Ice sheet modeling• coupled ice sheet - climate modeling• coupled ice sheet - sediment modeling
Process-Oriented Themes:• Terrestrial landscapes• Tectonics - ice sheets, ocean-floor topography• Climate influence - sedimentary record
Time-based Themes:• Eocene to Holocene target intervals
Critical thresholds:
IPY Contributions:
Theme 2: To quantify, and understand, past and present environmental and human change in thePolar regions in order to improve predictions
• how has planet responded to multiple glacial cycles?• what critical factors triggered the cooling of the
polar regions?
Theme 3: global teleconnections
Theme 4: unknowns at the frontiers of science
New data integrated/understood through modeling
Outreach & Education:
• Web: online lecture series
• Young scientists:• support travel to workshops• organize exchange between institutions
ANTARCTICCLIMATE
EVOLUTION(ACE)
An international research initiative to studythe climate and glacial history of Antarctica
through palaeoclimate and ice-sheet modelingintegrated with the geological record.