HR: 08:30h
AN: PP51G-03    [Abstracts]
TI: Climate Model Driven Simulation and Inversion of Borehole Temperature Profiles
AU: * Beltrami, H J
EM: hugo@stfx.ca
AF: Environmental Sciences Research Centre, St. Francis Xavier University, 1 West Street, Antigonish, NS B2G 2W5 Canada
AU: Zorita, E
EM: zorita@gkss.de
AF: Institute for Coastal Research, GKSS Research Centre, 1 Max-Planck-Strasse, Geesthacht, 21502 Germany
AU: von Storch, H
EM: storch@gkss.de
AF: Institute for Coastal Research, GKSS Research Centre, 1 Max-Planck-Strasse, Geesthacht, 21502 Germany
AU: Gonzalez-Rouco, J F
EM: fidelgr@fis.ucm.es
AF: Dpt. Astrofisica y Ciencias de la Atmosfera, Universidad Complutense Madrid, Av. Complutense, Madrid, 28040 Spain
AB: Transient integrations for the last 1000 years produced with the ECHO-g ocean-atmosphere global climate model are used to simulate deep soil temperature perturbation profiles. For this purpose, a heat conduction forward model is driven with surface thermal conditions provided by the ECHO-g integrations. An inversion model is subsequently used to return ground surface temperature histories for comparison with simulated surface air temperature, thus mimicking the borehole approach to climate reconstrution. Results support the sensitivity of inversion methods to derive the long term trends in the climate model simulations and the robustness of using the present distribution of deep soil temperature profiles for estimating terrestrial SAT variations. The procedure is also used to illustrate the effects of other uncertainties affecting borehole climatology (surface coupling, different dating and depth of borehole profiles ...). These are discussed in terms of the potential and limitations of borehole climate reconstructions and model simulations to understand climate variability and changes through the last millennium.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1631 Land/atmosphere interactions (1218, 1843, 3322)
DE: 1637 Regional climate change
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
DE: 4928 Global climate models (1626, 3337)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005