An approach to represent mesoscale (subgrid-scale) fluxes in GCMs demonstrated with simulations of local deforestation in Amazonia

R. Avissar, F. Chen

Research output: Contribution to journalArticlepeer-review

Abstract

In the present study we simulated the atmospheric planetary boundary layer (PBL) that develops above a locally deforested area of the Amazonian region, to illustrate the relationships that exist: i) between the diurnal variation of MKE and the diurnal variation of mesoscale latent and sensible heat fluxes; and ii) between landscape discontinuities resulting from horizontal gradients of moisture at the ground surface and MKE. We compared MKE with turbulence kinetic energy (TKE) to emphasize the magnitude of mesoscale processes, as compared to turbulent processes. This analysis illustrates the potential use of MKE to bridge between landscape discontinuities and mesoscale fluxes and, therefore, to parameterize mesoscale fluxes generated by such subgrid-scale landscape discontinuities in GCMs and other large-scale atmospheric models. -from Authors

Original languageEnglish (US)
Pages (from-to)89-109
Number of pages21
JournalUnknown Journal
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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