HR: 0800h
AN: H31C-04    [Abstracts]
TI: CALIBRATION OF A LAND SURFACE MODEL FOR THE SIMULATION OF SENSIBLE AND LATENT HEAT FLUXES USING THREE DIFFERENT METHODS
AU: * Imbuzeiro, H M
EM: hewlley@hotmail.com
AF: University Federal of Vicosa, Av. Ph Rolfs, Vicosa, MG 36570000, Brazil
AU: Costa, M H
EM: mhcosta@ufv.br
AF: University Federal of Vicosa, Av. Ph Rolfs, Vicosa, MG 36570000, Brazil
AU: Rocha, H
EM: humberto@model.iag.usp.br
AF: University of Sao Paulo, Rua do Matao 1226, Sao Paulo, SP 05508900, Brazil
AB: In this paper, we compare three different procedures to calibrate land surface models. The procedures are illustrated using the Integrated Biosphere Simulator (IBIS) and a dataset collected at the Flona Tapajos km 83 Amazonian tropical rainforest site, located near Santarem, state of Para, Brazil. The three procedures are: (a) a single criterion procedure (minimization of RMSE _H/LE); (b) a two criteria procedure (minimization of RMSE_H + RMSE_LE); (c) a two-step, six-criteria procedure (our proposal). The two-step procedure first filters only the non-biased estimates and then minimizes a four parameter function. The two-step procedure guarantees a consistent non-biased estimation for the evaluated output variables, sensible heat flux (H) and latent heat flux (LE), and seems to be more robust than the other two methods, for the skill functions evaluated.
DE: 1846 Model calibration (3333)
DE: 3333 Model calibration (1846)
DE: 4255 Numerical modeling (0545, 0560)
DE: 5445 Meteorology (3346)
SC: Hydrology [H]
MN: 2007 Joint Assembly