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Radiation Transfer Model Intercomparison (RAMI) exercise: Results from the second phase

Pinty, B; Widlowski, JL; Taberner, M; Gobron, N; Verstraete, MM; Disney, M; Gascon, F; ... Zang, H; + view all (2004) Radiation Transfer Model Intercomparison (RAMI) exercise: Results from the second phase. Journal of Geophysical Research - Atmospheres , 109 (D6) , Article D06210. 10.1029/2003JD004252. Green open access

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Abstract

The Radiation Transfer Model Intercomparison (RAMI) initiative is a community-driven exercise to benchmark the models of radiation transfer (RT) used to represent the reflectance of terrestrial surfaces. Systematic model intercomparisons started in 1999 as a self-organized, open-access, voluntary activity of the RT modeling community. The results of the first phase were published by Pinty et al. [2001]. The present paper describes the benchmarking protocol and the results achieved during the second phase, which took place during 2002. This second phase included two major components: The first one included a rerun of all direct-mode tests proposed during the first phase, to accommodate the evaluation of models that have been upgraded since, and the participation of new models into the entire exercise. The second component was designed to probe the performance of three-dimensional models in complex heterogeneous environments, which closely mimic the observations of actual space instruments operating at various spatial resolutions over forest canopy systems. Phases 1 and 2 of RAMI both confirm not only that a majority of the radiation transfer models participating in RAMI are in good agreement between themselves for relatively simple radiation transfer problems but also that these models exhibit significant discrepancies when considering more complex but nevertheless realistic geophysical scenarios. Specific recommendations are provided to guide the future of this benchmarking program (Phase 3 and beyond).

Type: Article
Title: Radiation Transfer Model Intercomparison (RAMI) exercise: Results from the second phase
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2003JD004252
Publisher version: http://dx.doi.org/10.1029/2003JD004252
Language: English
Additional information: Copyright 2004 by the American Geophysical Union
Keywords: Radiation transfer models, Rami intercomparison exercise, Surface radiation, Vegetation canopies, Reflectance model, Light-scattering, Plant canopies, Inversion
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/65145
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