Transport of forest fire smoke above the tropopause by supercell convection

Details Transport of forest fire smoke above the tropopause by supercell convection Transport of forest fire smoke above the tropopause by supercell convection

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30j..49f&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 10, pp. 49-1, CiteID 1542, DOI 10.1029/2002GL016820

Physics

55

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry, Meteorology And Atmospheric Dynamics: Convective Processes

Scientific paper

A recent letter [Fromm et al., 2000] postulated a link between boreal forest fire smoke and observed stratospheric aerosol enhancements in 1998. Therein a case was made that severe convection played a role in the cross-tropopause transport. A similar occurrence of stratospheric aerosol enhancements in the boreal summer of 2001 was the stimulus to investigate the causal mechanism more deeply. Herein, we show a detailed case illustrating the unambiguous creation of a widespread, dense smoke cloud in the upper troposphere and lower stratosphere (UT/LS) by a Canadian forest fire and explosive convection in May 2001. This event is the apparent common point for several downstream stratospheric mystery cloud observations. Implications of this finding and those pertaining to the boreal summer of 1998 are that convection and boreal biomass burning have an under-resolved and under-appreciated impact on the upper troposphere, lower stratosphere, radiative transfer, and atmospheric chemistry.

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