Turner, David: Oregon State University (Project Lead)
Jacobson, Andrew (Andy): Cooperative Institute for Research in Environmental Sciences (CIRES) (Co-Investigator)
Nemani, Ramakrishna (Rama): NASA ARC (Institution Lead)
Project Funding:
2010 - 2013
NRA: 2008 NASA: Terrestrial Ecology
Funded by NASA
Abstract:
The proposed research will generate daily and annual estimates of gross ecosystem exchange and NEE over North America at the 1 km spatial resolution for the MODIS era using spatially distributed models. We will investigate sources of variation and uncertainty in our estimates associated with interannual variation in climate, with how disturbance history is characterized, and with the form of the spectral data used in the scaling procedure. The approach will use a combination of prognostic and diagnostic carbon cycle models, with a focus on satellite-driven diagnostic models developed with previous NASA support. We will evaluate our continental NEE estimates by comparisons to continental scale estimates of NEE from an inversion approach based on observations of CO2 concentration (NOAA’s CarbonTracker). Our fluxes will also be input to CarbonTracker and discrepancies between observed and predicted CO2 concentrations will be used to evaluate alternative model algorithms and inputs (e.g. MODIS vs. SeaWiFS FPAR). Because quantifying the terrestrial carbon sink in North America is of policy significance in relation to addressing the climate change issue, this research contributes to the NASA strategic goal of advancing scientific understanding of Earth and meeting societal needs. It will further the NASA research objective of improving carbon cycle models, and results will inform the next NACP assessment of the state of the carbon cycle.
Publications:
Turner, D. P., Jacobson, A. R., Ritts, W. D., Wang, W. L., Nemani, R. 2013. A large proportion of North American net ecosystem production is offset by emissions from harvested products, river/stream evasion, and biomass burning. Global Change Biology. DOI: 10.1111/gcb.12313
Hayes, D., Turner, D. 2012. The need for "apples-to-apples" comparisons of carbon dioxide source and sink estimates. Eos, Transactions American Geophysical Union. 93(41), 404-405. DOI: 10.1029/2012EO410007
Hayes, D. J., Turner, D. P., Stinson, G., McGuire, A. D., Wei, Y., West, T. O., Heath, L. S., Jong, B., McConkey, B. G., Birdsey, R. A., Kurz, W. A., Jacobson, A. R., Huntzinger, D. N., Pan, Y., Post, W. M., Cook, R. B. 2012. Reconciling estimates of the contemporary North American carbon balance among terrestrial biosphere models, atmospheric inversions, and a new approach for estimating net ecosystem exchange from inventory-based data. Global Change Biology. 18(4), 1282-1299. DOI: 10.1111/j.1365-2486.2011.02627.x
King, D. A., Turner, D. P., Ritts, W. D. 2011. Parameterization of a diagnostic carbon cycle model for continental scale application. Remote Sensing of Environment. 115(7), 1653-1664. DOI: 10.1016/j.rse.2011.02.024
Turner, D. P., Ritts, W. D., Wharton, S., Thomas, C., Monson, R., Black, T. A., Falk, M. 2009. Assessing FPAR source and parameter optimization scheme in application of a diagnostic carbon flux model. Remote Sensing of Environment. 113(7), 1529-1539. DOI: 10.1016/j.rse.2009.03.003
Nightingale, J. M., Morisette, J. T., Wolfe, R. E., Tan, B., Gao, F., Ederer, G., Collatz, G. J., Turner, D. P. 2009. Temporally smoothed and gap-filled MODIS land products for carbon modelling: application of the fPAR product. International Journal of Remote Sensing. 30(4), 1083-1090. DOI: 10.1080/01431160802398064
Turner, D. P., Ritts, W. D., Styles, J. M., Yang, Z., Cohen, W. B., Law, B. E., Thornton, P. E. 2017. A diagnostic carbon flux model to monitor the effects of disturbance and interannual variation in climate on regional NEP. Tellus B: Chemical and Physical Meteorology. 58(5), 476-490. DOI: 10.1111/j.1600-0889.2006.00221.x
2011 NASA Carbon Cycle & Ecosystems Joint Science Workshop Poster(s)
- Assessing regional net ecosystem production with diagnostic and prognostic modeling approaches
-- (David Turner, William Ritts, Mathias Goeckede, Beverly Law, Ramakrishna R. Nemani)
[abstract]
2010 NASA Terrestrial Ecology Science Team Meeting Poster(s)
- Influences of FPAR source, number of reference sites, ecoregion configuration, and meteorological data source on parameter optimization of a diagnostic carbon cycle model
-- (David P Turner, David King, David Ritts)
[abstract]
More details may be found in the following project profile(s):
