A preliminary intercomparison of micrometeorological and ecological estimates of carbon sequestration in a mid-latitude deciduous forest for 1998 and 1999

摘要

Net CO_2 exchange can be measured on an annual basis, using eddy covariance techniques or from ecological inventories of various C compartments. Here we present an inter-comparison of annual estimates of C sequestration for 1998 and 1999 in a mixed hardwood forest in the Morgan-Monroe State Forest, Indiana, USA. Eddy covariance estimates were made at 1.8 times canopy height. For the same time period, ecological measures and model estimates of change in living biomass, sum of aboveground and belowground detritus production, consumption, and forest floor and soil respiration were made. The aim is to determine the consistency of spatially and temporally integrated estimates of net C sequestration for one-year periods for both 1998 and 1999, and to examine the inter-annual variability of estimates for those periods. Annual values calculated for both methods are for the time period (year/day) 98/60 - 99/59, and 99/1 - 99/365.