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|Holocene climate variability and ecosystem change in coastal East and Maritime Antarctica|
Original title: Holocene klimaatvariabiliteit en ecosysteemveranderingen in de kustzone van Oost en Maritiem Antarctica
Parent project: Science for a Sustainable Development
Reference no: SD/CA/01A
Period: December 2005 till January 2010
The Earth’s climate undergoes significant changes, which are not yet fully understood. Although the Holocene has not experienced climate changes of the same magnitude as during the major Quaternary glaciations, it has been marked by many, often rapid, global temperature and precipitation anomalies. Recently, parts of the Antarctic Peninsula (AP) region have experienced some of the most rapid warming on Earth, whereas a decline in the temperature record was observed in other Antarctic areas. This temperature rise near the AP has already led to ice shelf disintegration and rapid glacier retreat and influenced marine and terrestrial ecosystems. In order to understand how Antarctic temperature variation in inland and coastal areas are interrelated and can impact other regions on Earth, it is necessary to learn from the record of past natural climate variability.
The IGBP project PAGES (www.pages.unibe.ch) has set up the PEP (Pole-Equator-Pole) traverses 1, 2 and 3 in order to determine past climate changes along continental transects. HOLANT will explicitly extend the PEP 1 transect towards Sub-Antarctica and coastal Maritime Antarctica and contribute to the PEP2 and 3 transects by establishing and comparing a series of high resolution records of Holocene climate variability in coastal Antarctica based upon biological and sedimentological proxies in (coastal) lake sediments.
The specific research questions are:
HOLANT will use biological and sedimentological proxies and seismic surveys to reconstruct past climate changes and the evolution of climatically influenced lake basins in coastal Antarctic and Sub-Antarctic regions. In parallel, we will exploit our newly-developed techniques to study fossil DNA in lake sediments as a tool to reveal the response of the basal food web to past climate anomalies. We will relate the emerging spatio-temporal pattern in climate changes in Antarctica to changes in regional ice sheet volume and to global-scale climate anomalies during the past 10,000 years.
Interactions between the different partners
The scientific activities are organised into seven work packages (WP). The responsible partner is indicated after each task/work package.
WP1: Field work
WP 2: Establishment of sediment chronology from cores (BAS, PAE)
WP 3: Reconstruction of past climate changes using sedimentological and biological proxies in lake-sediment cores
WP 4: development of relative sea-level (RSL) curves and reconstruction of the deglaciation history (BAS, PAE)
WP 5: fossil DNA to reveal the response of the basal food web to past climate anomalies (CIP, PAE)
WP 6: reconstruction of regional climate change and integration with other regions (all partners)
WP 7: valorisation of the expected results (all partners)
Link with international programmes
HOLANT is closely integrated with three international research programs, namely the BAS CACHE program (www.antarctica.ac.uk/BAS_Science/programmes2005-2010/CACHE/projects/PEP/index.html), the Japanese Antarctic Research Expedition REGAL project and the French PEISACG program. HOLANT will also contribute to IPY research proposal MERGE (www.ipy.org/development/eoi/proposal-details.php?id=55) and to the new SCAR EBA program (www.scar.org/researchgroups/lifescience/eba). On a wider international level HOLANT will contribute to the IGBP PAGES PEP 1, 2 and 3 programs.
Expected results and/or products
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