Land-Atmosphere Transfer Parameters in the Brazilian Pantanal during the Dry Season

Autor(es)

Martano, Paolo ^[1] ; Marques Filho, Edson Pereira ^[2] ; de Abreu Sa, Leonardo Deane ^[3]

Afiliação do(s) autor(es)

^[1] UOS Lecce, CNR Ist Sci Atmosfera & Clima, I-73100 Lecce - Italy

^[2] Univ Fed Bahia, Inst Fis, Dept Fis Terra & Meio Ambiente, BR-40170280 Salvador, BA - Brazil

^[3] Inst Nacl Pesquisas Espaciais, Ctr Reg Amazonia, BR-66077830 Belem, Para - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ATMOSPHERE; v. 6, n. 6, p. 805-821, JUN 2015.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 98/00105-5 - Estudo da camada limite superficial do Pantanal Sul Matogrossense
• Beneficiário: Antonio Ocimar Manzi
• Modalidade de apoio: Auxílio à Pesquisa - Regular