HR: 14:10h
AN: C43D-03 [Abstracts]
TI: ISOMAP-UK: A Combined Data - Modelling Investigation of Water Isotopes and Their Interpretation During
Rapid Climate-Change Events
AU: Holmes, J
EM: j.holmes@ucl.ac.uk
AF: Environmental Change Research centre, University College London, London, WC1H 0AP
United Kingdom
AU: Atkinson, T
EM: t.atkinson@ucl.ac.uk
AF: Environmental Change Research centre, University College London, London, WC1H 0AP
United Kingdom
AU: Crowley, S
EM: sfcrow@liverpool.ac.uk
AF: Department of Earth and Ocean Sciences, University of Liverpool, Liverpool, L69 3GP
United Kingdom
AU: Daley, T
EM: t.j.daley@soton.ac.uk
AF: Department of Geography, University of Southampton, Southampton, SO117 1BJ
United Kingdom
AU: Fisher, L
EM: e.h.fisher@liverpool.ac.uk
AF: Department of Earth and Ocean Sciences, University of Liverpool, Liverpool, L69 3GP
United Kingdom
AU: Hercman, H
EM: hhercman@twarda.pan.pl
AF: Institute of Geological Sciences, Polish Academy of Sciences, Warsaw, 00-818
Poland
AU: Liptrot, E
EM: e.liptrot@ucl.ac.uk
AF: Environmental Change Research centre, University College London, London, WC1H 0AP
United Kingdom
AU: Lowe, J
EM: j.lowe@rhul.ac.uk
AF: Department of Geography, Royal Holloway University of London, Egham, TW200EX
United Kingdom
AU: Marshall, J
EM: isotopes@liverpool.ac.uk
AF: Department of Earth and Ocean Sciences, University of Liverpool, Liverpool, L69 3GP
United Kingdom
AU: Rowe, P
EM: p.rowe@uea.ac.uk
AF: School of Eanvironmental Sciences, University of East Anglia, Norwich, NR4 7TJ
United Kingdom
AU: Scott, N
EM: 304378@swansea.ac.uk
AF: Department of Geography, University of Wales Swansea, Swansea, SA2 8PP
United Kingdom
AU: * Street-Perrott, A
EM: f.a.street-perrott@swansea.ac.uk
AF: Department of Geography, University of Wales Swansea, Swansea, SA2 8PP
United Kingdom
AU: Tindall, J
EM: Julia.Tindall@bristol.ac.uk
AF: Department of Geography, University of Bristol, Bristol, BS8 1SS
United Kingdom
AU: Valdes, P
EM: p.j.valdes@bristol.ac.uk
AF: Department of Geography, University of Bristol, Bristol, BS8 1SS
United Kingdom
AU: Verheyden, S
EM: sverheyd@lsce.saclay.cea.fr
AF: LSCE CEA, Saclay, Gif-sur-Yvette, 91191
France
AU: White, S
EM: ucfbsvw@ucl.ac.uk
AF: Environmental Change Research centre, University College London, London, WC1H 0AP
United Kingdom
AU: Barber, K
EM: keith.barber@soton.ac.uk
AF: Department of Geography, University of Southampton, Southampton, SO117 1BJ
United Kingdom
AU: Wolff, E
EM: ewwo@bas.ac.uk
AF: British Antarctic Survey, High Cross, Cambridge, CB3 0ET
United Kingdom
AB:
Stable isotopes of oxygen and hydrogen within the water molecule provide excellent tracers of climate and climate-related
processes within the hydrological cycle. Archives of past variations in water isotopes provide invaluable insights into the
nature and causes of abrupt climate change. Long-term changes in oxygen- and hydrogen-isotope ratios in precipitation reflect
variations in vapour source, airmass trajectory, rainout history and air temperature, all of which may be influenced
strongly by changes in the strength of the thermohaline circulation. Quantitative information about the past isotopic
composition of precipitation is transferred to natural archives such as ice sheets, lake sediments, peat and speleothems.
Isotopic analyses of such archives can be used to reconstruct long-term histories of the precipitation isotope composition.
The aim of this project is to compare carefully-chosen, high-resolution, late-glacial and Holocene isotope records from a
range of terrestrial archives in Northwest Europe with model simulations of isotopes in precipitation in order to investigate
the role of different forcing factors in rapid climate change. Model simulations will be undertaken using the UK Hadley
Centre model HadCM3: incorporation of water-isotope diagnostics into this model, coupled with appropriate validation, is an
ongoing component of the project. The mapping and modelling of the past distribution of isotopes in precipitation form the
focus of the IGBP PAGES initiative ISOMAP (ISOtope calibration and MAPping study): this project is a UK contribution to
ISOMAP, with specific reference to the investigation of rapid climatic events in Britain and NW Europe.
DE: 3344 Paleoclimatology
DE: 1704 Atmospheric sciences
DE: 1719 Hydrology
DE: 1854 Precipitation (3354)
DE: 1040 Isotopic composition/chemistry
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting