The oxygen to carbon dioxide ratios observed in emissions from a wildfire in Northern California

Citation:
Lueker, TJ, Keeling RF, Dubey MK.  2001.  The oxygen to carbon dioxide ratios observed in emissions from a wildfire in Northern California. Geophysical Research Letters. 28:2413-2416.

Date Published:

Jun

Keywords:

biomass fires, trace gases, transform infrared-spectroscopy

Abstract:

At Trinidad, California we observed elevated CO2 concentrations and concomitant lowered O-2 levels coincident with forest fires 70 kin distant (from 10/8/99 to 10/21/99). The precision of our O-2 data, 1 mu mol O-2 /mol dry air, revealed the reduction of atmospheric oxygen resulting from the combustion of biomass, and the stoichiometric ratios (-O-2/CO2) of the wildfire emissions. Estimates of daily -O-2/CO2 ratios were obtained by regression of CO2 against corresponding O-2 data (R-2, 0.86 to 0.96). Daily -O-2/CO2 ratios changed from 1.15 to 1.41 on a particularly smoky day that coincided with elevated levels of CH4 and increased CH4/CO2 ratios. The change to a higher ratio during smoky conditions illustrates the association between changing emissions and -O-2/CO2 ratios, possibly due to changing wildfire dynamics.

Notes:

n/a

Website

DOI:

10.1029/2000gl011860