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Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models.

Saulo R. Freitas, CPTEC/INPE, (Presenting)
Karla M. Longo, CPTEC/INPE,
Robert Chatfield, NASA AMES,

We adopt the super-parameterization concept to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport models. This sub-grid transport mechanism is simulated by embedding a 1D cloud resolving model with appropriate lower boundary condition in each column of the 3D host model. Through assimilation of remote sensing fire product, we recognize which column has fires, using a land use dataset appropriate fire properties are selected. The host model provides the environmental condition and, finally, the plume rise is explicitly simulated. The final height of the plume is then used in the source emission field of the host model to determine the effective injection height, releasing the material emitted during the flaming phase at this height. Model results are compared with CO aircraft profiles from the SMOCC campaign and with MOPITT and AIRS CO data showing the huge impact that this mechanism has on model performance.

Science Theme:  TG (Trace Gases)

Presentation Type:  Poster

Abstract ID: 38

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