Exploring the relationship between complexity and performance in a land surface model using the multicriteria method

M. Leplastrier, A. J. Pitman, H. Gupta, Y. Xia

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

The performance of five modes of a land surface model, the Chameleon Surface Model (CHASM), was investigated after calibration via the multicriteria method to monthly totals of evaporation and runoff from the Valdai data set. The use of CHASM allows for an exploration into the relationship between surface energy balance complexity and optimal performance by isolating the impacts of different parameterizations of the surface energy balance. When compared to quantities used within the calibration process, CHASM's performance was significantly increased with calibration over default simulations regardless of calibration length or mode complexity. Within the calibration period, CHASM's performance increased with increasing complexity in the representation of the surface energy balance. Outside the calibration period there was little improvement to simulations from additional complexity in the surface energy balance representation above the simplest mode. Calibration is shown to reduce the scatter between modes suggesting that some of the differences between models in PILPS Phase 2d may be explained by the specification of parameter values. For simulations of quantities not used in calibration, performance can be reduced as a result of calibration. This implies that evaporation and runoff may not be the best quantities for calibration in order to improve model performance. It is suggested that the best quantities to calibrate may be mode and model specific.

Original languageEnglish (US)
Pages (from-to)ACL 11-1-ACL 11-12
JournalJournal of Geophysical Research: Atmospheres
Volume107
Issue number20
DOIs
StatePublished - 2002

Keywords

  • 1818 Hydrology: Evapotranspiration
  • 1878 Hydrology: Water/energy interactions
  • 3322 Meteorology and Atmospheric Dynamics: Land/atmosphere interactions
  • Calibration
  • Complexity
  • Land surface
  • Multicriteria
  • PILPS

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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