Is There a Classical Inertial Sublayer Over the Amazon Forest?
On the basis of measurements over different surfaces, an inertial sublayer (ISL), where Monin-Obukhov Similarity Theory applies, exists above z=3h, where h is canopy height. The roughness sublayer is within h
Autor principal:
Dias Júnior, Cléo Quaresma
Outros Autores:
Dias, Nelson Luís da Costa, dos Santos, Rosa Maria Nascimento, Sörgel, Matthias, Araüjo, Alessandro Carioca de, Tsokankunku, Anywhere, Ditas, Florian, Santana, Raoni Aquino Silva de, Von Randow, Celso, Marta, S. Á., Pöhlker, Christopher, Machado, Luiz Augusto Toledo, Sá, Leonardo Deane de, Morán-Zuloaga, Daniel, Janssen, Ruud H.H., Acevedo, Otávio C., Oliveira, Pablo E.S., Fisch, Gilberto Fernando, Chor, Tomás L., Manzi, Antônio Ocimar
Grau:
Artigo
Idioma:
English
Publicado em:
Geophysical Research Letters
2020
Assuntos:
Acesso em linha:
https://repositorio.inpa.gov.br/handle/1/16674
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On the basis of measurements over different surfaces, an inertial sublayer (ISL), where Monin-Obukhov Similarity Theory applies, exists above z=3h, where h is canopy height. The roughness sublayer is within h<z<3h. Most studies of the surface layer above forests, however, are able to probe only a narrow region above h. Therefore, direct verification of an ISL above tall forests is difficult. In this study we conducted a systematic analysis of unstable turbulence characteristics at heights from 40 to 325 m, measured at an 80m, and the recently built 325-m Amazon Tall Tower Observatory towers over the Amazon forest. Our analyses have revealed no indication of the existence of an ISL; instead, the roughness sublayer directly merges with the convective mixed layer above. Implications for estimates of momentum and scalar fluxes in numerical models and observational studies can be significant. ©2019. American Geophysical Union. All Rights Reserved. |