Land-Atmosphere Transfer Parameters in the Brazilian Pantanal during the Dry SeasonReportar como inadecuado




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1

CNR Istituto di Scienze dellAtmosfera e del Clima, UOS Lecce, Via Monteroni, Lecce 73100, Italy

2

Universidade Federal da Bahia, Instituto de Física, Departamento de Física da Terra e do Meio Ambiente, Travessa Barão de Jeremoabo, s-n, Campus Ondina, Salvador 40170-280, BA, Brazil

3

Centro Regional da Amazônia, Instituto Nacional de Pesquisas Espaciais INPE, Parque de C. & T. do Guamá, Av. Perimetral 2651, Lote 50, Belém 66.077-830, Pará, Brazil





*

Author to whom correspondence should be addressed.



Academic Editors: Daniele Contini and Robert W. Talbot

Abstract The Brazilian region of Pantanal is one of the largest wetlands in the world, characterized by a wet season, in which it is covered by a shallow water layer, and a dry season, in which the water layer disappears. The aim of this study is the estimation of the main parameters drag coefficients and surface scale lengths involved in modelling the surface atmosphere transfer of momentum, heat and water vapor from the dataset of the second Interdisciplinary Pantanal Experiment IPE2. The roughness parameters and the stability correction parameters have been estimated in the framework of the similarity theory for the vertical profiles of wind speed and temperature. Thus, a previously-developed methodology was adapted to the available dataset from the IPE2 five-level mast. The results are in reasonable agreement with the available literature. An attempt to obtain the scalar transfer parameters for water vapor has been performed by a Penman–Monteith approach using a two-component surface resistance in parallel between a vegetation and a bare soil part. The parameters of the model have been calibrated using a non-linear regression method. The scalar drag coefficient retrieved in this way is in agreement with that calculated by the flux-gradient approach for the sensible heat flux. Eventually, an evaluation of the vegetation contribution to the total vapor flux is given. View Full-Text

Keywords: Pantanal; roughness length; displacement length; similarity relations; nonlinear regression; Penman–Monteith equation Pantanal; roughness length; displacement length; similarity relations; nonlinear regression; Penman–Monteith equation





Autor: Paolo Martano 1,* , Edson Pereira Marques Filho 2 and Leonardo Deane de Abreu Sá 3

Fuente: http://mdpi.com/



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