Relating chamber measurements to eddy correlation measurements of methane flux

Abstract

Methane fluxes were measured using eddy correlation and chamber techniques during 1991 and 1997 at a peatland in north central Minnesota. Comparisons of the two techniques were made using averages of methane flux data available during 1-week periods. The seasonal patterns of fluxes measured by the two techniques compared well. Chamber flux, in 1991, was about 1.8 mg m^-2 hr^-1 greater than the flux obtained by the eddy correlation technique. In 1992, the chamber flux was about 1.5 mg m^-2 hr^-1 higher than the eddy correlation flux prior to midseason and 1.0 mg m^-2 hr^-1 lower than the eddy correlation flux after midseason. Chamber data from individual hummock and hollow pairs were used to calculate the averaged dF/dZ (rate of change of methane flux with surface height). During midseason in 1991, the magnitude of dF/dZ ranged between 10 and 100 (mg m^-2 hr

Citation

Clement, R.J.; Verma, S.B.; Verry, E.S. 1995. Relating chamber measurements to eddy correlation measurements of methane flux. Journal of Geophysical Research. 100(D10): 21,047-21,056.