Quantifying Disturbance and Global Change Impacts on Multi-decadal Trends in Aboveground Biomass and Land Cover across Arctic-boreal North America
Jonathan Wang, University of Utah, jon.wang@utah.edu (Presenter)
James T. Randerson, University Of California, Irvine, jranders@uci.edu
Mark Friedl, Boston University, friedl@bu.edu
Michael Goulden, University Of California, Irvine, mgoulden@uci.edu
Werner A Kurz, Canadian Forest Service, Natural Resources Canada, werner.kurz@canada.ca
Piotr Tompalski, Canadian Forest Service, piotr.tompalski@nrcan-rncan.gc.ca
Hans Erik Andersen, U.S. Forest Service Pacific Northwest Research Station, handersen@fs.fed.us
Douglas Morton, NASA GSFC, douglas.morton@nasa.gov
Benjamin Poulter, NASA GSFC, benjamin.poulter@nasa.gov
Kai-Ting Hu, Boston University, kthu@bu.edu
The Arctic-boreal carbon cycle is linked to vegetation composition and demography, which are being altered by changes in climate, atmospheric carbon dioxide, and disturbance. In a previous Terrestrial Ecology (ABoVE Phase 1) project, we created maps of land cover and aboveground biomass changes across the ABoVE core domain for 1984 – 2014 and found that increasing levels of wildfire disturbance are slowing rates of carbon accumulation in forests, increasing deciduous forest cover, and reducing evergreen forest cover. However, the spatial extent and period of this work restricted the conclusions that could be drawn regarding longer-term changes and trends in the continental-scale composition, structure, and carbon balance of Arctic-boreal ecosystems.
To address this limitation, as part of a new Terrestrial Ecology (ABoVE Phase 3) project, we are improving and extending the land cover and aboveground biomass data sets to include all of Arctic-boreal North America (i.e. all of Canada and Alaska) for the period 1984-2022. The annual land cover and biomass data sets will be based on time series analysis of Landsat Collection 2 Surface Reflectance at 30 m spatial resolution. These maps will be calibrated with airborne and spaceborne lidar data (e.g. from LVIS, G-LiHT, ICESat-2, and GEDI) and ground and photo plot data from the Canadian and American Forest Services. The new data products will be used to analyze how wildfires and global change have driven changes in the structure, composition, and aboveground carbon budget of Arctic-boreal ecosystems of North America, focusing on three questions: (1) How are aboveground biomass and land cover changing across Arctic-boreal North America? (2) What are the global change drivers of these long-term changes? and (3) How can we reconcile differences in carbon budgets derived from models, inventories, and remote sensing? We report here progress on gathering of input datasets and developing machine learning algorithms.
Poster: Poster_Wang_2-30_106_35.pdf
Associated Project(s):
Poster Location ID: 2-30
Presentation Type: Poster
Session: Poster Session 2
Session Date: Wed (May 10) 5:15-7:15 PM
CCE Program: TE