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Geophysical Monograph Series



  • Rain forest ecology—Amazon River Region
  • Biosphere—Research—Amazon River Region
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  • Amazon River Region—Climate



The Amazonian boundary layer and mesoscale circulations

A. K. Betts

Atmospheric Research, Pittsford, Vermont, USA

G. Fisch

Instituto de Aeronáutica e Espaço, São José dos Campos, Brazil

C. von Randow

Instituto Nacional de Pesquisas Espaciais, São José dos Campos, Brazil

M. A. F. Silva Dias

Department of Atmospheric Sciences, University of São José Paulo, São José Paulo, Brazil

J. C. P. Cohen

Departamento de Meteorologia, Universidade Federal do Pará, Belém, Brazil

R. da Silva

UFPA-LBA Santarem, Alter do Chão, Brazil

D. R. Fitzjarrald

Atmospheric Sciences Research Center, University at Albany, State University of New York, Albany, New York, USA

The interactions between the Amazonian boundary layer, the surface, atmospheric convection, aerosols, and larger-scale circulations are complex. The field experiments in Amazonia have provided rich insights into the daytime and nighttime boundary layer in different regions and seasons over both forest and pasture and into the coupling between the surface fluxes, the boundary layer, precipitation, and cloud radiative forcing. We discuss the typical diurnal cycle of Amazonian convection, the self-organization into mesoscale systems in different synoptic regimes, and the role of forest and river breeze circulations. We review the coupling between aerosols, smoke, and convection in the dry season; ozone transports by deep convection; and microphysical and electrical impacts on convection.

Citation: Betts, A. K., G. Fisch, C. von Randow, M. A. F. Silva Dias, J. C. P. Cohen, R. da Silva, and D. R. Fitzjarrald (2009), The Amazonian boundary layer and mesoscale circulations, in Amazonia and Global Change, Geophys. Monogr. Ser., vol. 186, edited by M. Keller et al., pp. 163–181, AGU, Washington, D. C., doi:10.1029/2008GM000725.


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