The Project for Intercomparison of Land-surface Parametrization Schemes (PILPS): 1992 to 1995 |
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Authors: | A Henderson-Sellers K McGuffie A J Pitman |
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Institution: | (1) Royal Melbourne Institute for Technology, Melbourne, Australia, AU;(2) Department of Applied Physics, University of Technology, Sydney, Australia, AU;(3) School of Earth Sciences, Macquarie University, North Ryde, Sydney, 2109 NSW, Australia, AU |
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Abstract: | The World Climate Research Programme Project for Intercomparison of Land-surface Parametrization Schemes (PILPS) is an on-going
international intercomparison of land surface schemes designed for use in climate modelling and weather prediction. The five
phases of PILPS are described in this work with an indication of the status of each. Phase 0 documented the status of land
surface schemes. Phase 1 performed a series of off-line tests using synthetic atmospheric forcing. Phase 2 exploited observational
data in off-line tests. Phase 3 was comprised of coupled tests within the Atmospheric Model Intercomparison Project (AMIP)
project and finally Phase 4 will consider the performance of land-surface schemes when coupled to their host climate models
in fully coupled evaluations. Results from Phase 1 indicate that there is a wide range among models. Phase 2 indicates that
while some models are consistent with observations, there remains a large range among models and that many diverge greatly
from observations. PILPS phases 2(a) and 2(b) results suggest that individual land-surface schemes capture specific aspects
of the complex system with reasonable accuracy but no one scheme captures the whole system satisfactorily and consistently.
In Phase 3 the intercomparison of PILPS schemes as a component of global atmospheric circulation models is being conducted
jointly with the AMIP as diagnostic subproject number 12. Preliminary results suggest that results differ by about the same
range as in the offline experiments in Phases 1 and 2. Phase 4 will couple selected land-surface schemes to the USA's National
Center for Atmospheric Research climate system model and to the Australian Bureau of Meteorology limited area model.
Received: 24 October 1995 / Accepted: 28 May 1996 |
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