Assessing wind profile effects on the global atmospheric torque

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Miranda, PMA (Autor) Outra; Martins, JPA (Autor) Outra; Teixeira, MAC (Autor) Outra

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY

Vol. 135

Páginas: 807-814

ISSN: 0035-9009

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-003-MBW

DOI: 10.1002/qj.393

Abstract (EN): The impact of a new approach to the evaluation of surface gravity wave drag (GWD) is assessed, This approach uses linear theory, but incorporates the effects of wind profile shear and curvature, by means of a second-order WKB approximation. While the theory predicts the possibility of either drag enhancement or reduction, depending oil the wind profile, results obtained with the ERA-40 reanalysis data clearly indicate the predominance of local drag enhancement. However, the global impact of shear on the atmospheric axial GWD torque comes mostly from regions with predominantly easterly flow, contributing to a slight reduction of the bias found in different studies of the global angular momentum budget. The relative correction due to shear on linear GWD is found not to depend too strongly on the levels chosen for the computation of the low-level Wind derivatives. Copyright (C) 2009 Royal Meteorological Society

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8