HR: 0800h
AN: B11A-1003    [Abstracts]
TI: IPILPS: Modelling Stable Water Isotopes Exchanges Between the Land and the Atmosphere
AU: Sellers, A
EM: ahssec@ansto.gov.au
AF: Nuclear Geophysiology, ANSTO, PMB1, Menai, 2234 Australia
AU: * Yoshimura, K
EM: kei@iis.u-tokyo.ac.jp
AF: Institute of Industrial Science, University of Tokyo, Tokyo, 153-8505 Japan
AU: Fischer, M
EM: ipilps@ansto.gov.au
AF: Nuclear Geophysiology, ANSTO, PMB1, Menai, 2234 Australia
AU: Aleinov, I
EM: ialeinov@simplex.giss.nasa.gov
AF: Goddard Institute for Space Sciences, Columbia University, New York, NY 10025 United States
AU: Irannejad, P
EM: pix@ansto.gov.au
AF: Institute of Geophysics, University of Tehran, Tehran, 6466-14155 Iran (Islamic Republic of)
AU: McGuffie, K
EM: Kendal.McGuffie@uts.edu.au
AF: Applied Physics, University of Technology Sydney, Sydney, 2007 Australia
AU: Riley, W J
EM: wjriley@lbl.gov
AF: E.O., Lawrence Berkeley National Laboratories, Berkeley, CA 94720 United States
AU: Schmidt, G A
EM: gschmidt@giss.nasa.gov
AF: Goddard Institute for Space Sciences, Columbia University, New York, NY 10025 United States
AU: Sturm, K
EM: kst@ansto.gov.au
AF: Nuclear Geophysiology, ANSTO, PMB1, Menai, 2234 Australia
AB: iPILPS, 'Isotopes in the Project for Intercomparison of Land-Surface Parameterization Schemes', is a World Climate Research Programme project operating under the auspices of the Global Energy and Water Cycle Experiment. iPILPS adds stable water isotopes to PILPS' overarching goal of improving understanding of the parameterization of interactions between the atmosphere and land surface in climate and weather forecast models. Land and atmosphere exchanges are complex functions of many physical and biochemical processes that have a range of temporal and spatial scales. Many of these processes also result in fractionation of stable water isotopologues (SWIs), allowing isotopes (a) to be used to investigate latent and sensible heat fluxes and (b) to investigate the differences between, and how well, different parameterisations of the complex processes simulate energy and moisture exchanges. In Phase 1 of iPILPS, several isotope-enabled land surface schemes (ILSS) were run off-line with forcing derived by nesting the regional model REMOiso into an isotope-enabled GCM (ECHAM 4). Phase 1 intercomparisons initially focussed on comparing (i) the conservation and equilibrium state of SWIs achieved by each ILSS and (ii) the energy and SWI balance over several years at 3 different locations: mid-latitude (deciduous) grass/woods, Munich 48°N 11°E; tropical (evergreen) rainforest, Manaus 3°S 60°W; mid-latitude eucalypt (evergreen) forest, Tumbarumba 35°S 148°E.
This paper presents results of these experiments from selected participant ILSSs (REMOiso, iso-MATSIRO, ICHASM, ISOLSM and GISS Model E). These preliminary results demonstrate the merit in SWI evaluation of continental parameterization, although the large variation in the energy and SWI budgets points to the continuing need for improvement in land surface schemes.
UR: http://ipilps.ansto.gov.au
DE: 0454 Isotopic composition and chemistry (1041, 4870)
DE: 0466 Modeling
DE: 1041 Stable isotope geochemistry (0454, 4870)
DE: 4870 Stable isotopes (0454, 1041)
SC: Biogeosciences [B]
MN: Fall Meeting 2005