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TitleEstimating carbon release caused by land use changes over Canada's north during 1985-1990 and 1990-2000 using satellite Earth observation
AuthorChen, WORCID logo; Blain, D; Li, J; Fraser, RORCID logo; Zhang, YORCID logo; Leblanc, S; Koehler, K; Olthof, I; Wang, J; McGovern, M
SourceJournal of Geophysical Research, Biogeosciences vol. 114, no. 1, G01017, 2009., Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20181082
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; Nature and Environment; remote sensing
ProgramClimate Change Geoscience
Released2009 02 24
AbstractThis study estimates the greenhouse gas removal/emission due to land use changes (LUC) over Canada's arctic and subarctic landmass to meet Canada's reporting obligation to the United Nations Framework Convention on Climate Change (UNFCCC). Using Landsat scenes circa 1985, 1990, and 2000, as well as GIS information, we estimated the rate of LUC over Canada's north being 548 ha a-1 during 1985-1990 and 725 ha a-1 during 1990-2000. We then developed circa 2000 baseline aboveground biomass maps for the areas affected by these LUC by applying the relationships between measured aboveground biomass and a combination of Landsat and JERS-I data. From these aboveground biomass maps and LUC estimates, we calculated that the LUC activities over Canada's north released 29,000 ± 44001CO2 a-1 during 1985-1990 and 41,000 ± 62001 t CO2 a-1 during 1990-2000. Only aboveground biomass was considered. Monte Carlo simulation method was used to quantify the overall error caused by uncertainties in estimates of LUC area and CO2 emission. Because soil carbon stock over Canada's arctic and subarctic ecosystems can be 10-100 time larger than that of aboveground biomass, accurately quantifying soil carbon stock change caused by LUC should be a priority in future studies.

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