The importance of mesoscale circulations generated by subgrid-scale landscape heterogenities in general circulation models

B. H. Lynn, D. Rind, R. Avissar

Research output: Contribution to journalArticlepeer-review

Abstract

A mesoscale atmospheric model was used to evaluate the impact of subgrid-scale landscape discontinuities on the vertical profiles of resolved temperature, moisture, and moist static energy in the planetary boundary layer (PBL) of GCMs. They were compared to corresponding vertical profiles produced with a 1D version of the model, which simulates the PBL, as in a GCM, over a single horizontal grid element. Differences obtained between the horizontally averaged atmospheric variables produced with the 3D simulations and the 1D simulations emphasize the impact of a subgrid-scale landscape discontinuities on GCM-resolved variables. Various types of landscape discontinuities, characterized by horizontal contrasts of surface wetness and size of land patches, were simulated under various background-wind conditions. -from Authors

Original languageEnglish (US)
Pages (from-to)191-205
Number of pages15
JournalJournal of Climate
Volume8
Issue number2
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Atmospheric Science

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