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Interannual variations in the contemporary atmospheric CO2 growth rate are large and are closely linked with El Nino/Southern Oscillation [Bacastow, 1976; Keeling et al., 1989].  Inverse modeling studies using carbon isotopes indicate that much of the CO2 variability originates within terrestrial ecosystems [Battle et al., 2000].  Here we investigate controls over terrestrial ecosystem fluxes during the 7 year period from 1997 – 2003 using satellite data and the Carnegie-Ames-Stanford-Approach (CASA) biogeochemical model.  In our analysis, we separate annual variations caused by Net Primary Production (NPP), heterotrophic respiration (Rh), and biomass burning.  NPP was estimated using Advanced Very High Resolution Radiometer (AVHRR) Global Inventory Modeling and Mapping Studies (GIMMS), [Tucker et al., 2005] data in combination with interannual varying solar radiation [Kanamitsu et al., 2002; Zhang et al., 2004], precipitation [Adler et al., 2003], and temperature [Hansen et al., 1999] data.  The precipitation and temperature data were also used to estimate heterotrophic respiration rates.


Author: G.R. van der Werf, L.Giglio, G.J. Collatz, et al (jim dot collatz at nasa dot gov)
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     Talk History
Friday, September 30
· Discussion Panel
· Nitrogen Regulation of Carbon Sequestration in Terrestrial Ecosystems in Respons
· The Role of Water Relations in Driving Grassland Ecosystem Responses to Rising A
· Unraveling the Decline in High-latitude Surface Ocean Carbonate
Thursday, September 29
· Hazards of Temperature on Food Availability in Changing Environments (HOT-FACE)
· The Amazon and the Modern Carbon Cycle
· New Coupled Climate-carbon Simulations from the IPSL Model
· The Changing Carbon Cycle
· What are the Most Important Factors for Climate-carbon Cycle Coupling?
· CO2 Uptake of the Marine Biosphere
· European-wide Reduction in Primary Productivity Caused by the Heat and Drought i
· Persistence of Nitrogen Limitation over Terrestrial Carbon Uptake
· Atmospheric CO2, Carbon Isotopes, the Sun, and Climate Change over the Last Mill
· Proposing a Mechanistic Understanding of Atmospheric CO2 During the late Pleist
· Greenhouse Gas (CO2, CH4) and Climate Evolution since 650 kyrs Deduced from Anta
Wednesday, September 28
· (In and) Out of Africa: Estimating the Carbon Exchange of a Continent
· Recent Shifts in Soil Dynamics on Growing Season Length, Productivity, and...
· Interannual Variability in the Carbon Exchange Using an Ecosystem-fire Model
· Photosynthesis and Respiration in Forests in Response to Environmental Changes
· Seasonal and Interannual Variability in Net Ecosystem CO2 Exchange in Japan
· Estimating Landscape-level Carbon Fluxes from Tower CO2 Mixing Ratio Measurement
· Monitoring Effects in Climate and Fire Regime on Net Ecosystem Production
· Radiative Forcing from a Boreal Forest Fire
· The Influence of Soil and Water Management on Carbon Erosion and Burial
· Spatial and Temporal Patterns of CO2, CH4, and N2O Fluxes in Ecosystems
· Modeling the History of Terrestrial Carbon Sources and Sinks
· The Age of Carbon Respired from Terrestrial Ecosystems
· Discussion Panel
· The Underpinnings of Land Use History
Tuesday, September 27
· Regional CO2 Fluxes for North America Estimated from NOAA/CMDL Observatories

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The 7th International CO2 Conference

The Omni Interlocken Resort
September 25th - 30th
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