Synthesis of Arctic System Carbon Cycle Research Through Model-Data Fusion Studies Using Atmospheric Inversion and Process-Based Approaches (SASS PI Meeting – 2-4 October 2007) A. David McGuire (Project Leader) USGS - Institute of Arctic Biology - University of Alaska Fairbanks.
Synthesis of Arctic System Carbon Cycle Research Through Model-Data Fusion Studies Using Atmospheric Inversion and Process-Based Approaches(SASS PI Meeting – 2-4 October 2007)A. David McGuire (Project Leader)USGS - Institute of Arctic Biology - University of Alaska Fairbanks
DOC, DIC, POC
1. Conduct model-data fusion studies with process-based models of various components of high latitude terrestrial C dynamics including
a. Terrestrial CO2 (McGuire lead; STM-TEM) and CH4 exchange (Zhuang lead; MCEM), and
b. Transfer of C from high latitude terrestrial ecosystems to the mouth of rivers in the Pan-Arctic Drainage Basin (Melillo/Peterson/McClelland/Kicklighter lead;
2. Conduct model-data fusion studies with a process-based model of marine CO2 exchange in oceans adjacent to the high latitude terrestrial regions (Follows lead; ECCO2 and MIT Biogeochemistry Model)
3. Improve atmospheric inversions of CO2 and CH4 across high latitude regions through better incorporation of data and process-understanding on CO2 and CH4 dynamics (Prinn lead; MATCH Atmospheric Inversion Framework).
4. Project synthesis (All).
Simulated mean net ecosystem carbon balance: Combination of CO2, climate, and fire: 1996-2002 (from Balshi et al. 2007)
Hayes: Organizing Multiple Disturbance Data Sets
g C m-2 yr-1
= 56 Tg CH4 yr-1
= -7 Tg CH4 yr-1
= 49 Tg CH4 yr-1
(Zhuang et al., 2004GBC)
New Research Improving Changes in Wetlands (Seasonal to Decadal)
0 1 2 4 8 16 32 315
g C m-2 yr-1
Kicklighter et al. in preparation
Tracking Sources of Riverine DOC @ surface Basins during the 1990s
Scatter plot of yearly averaged CH Basins during the 1990s4 column burden by SCIAMACHY vs. MATCH (on each model grid).
Slope is 1.01, i.e., good agreement in spatial gradient.
Large offsets (~8%), contamination by clouds, aerosols?
Opportunities for Linkages to Other Project Basins during the 1990s