Publications

Publications Found: 1437

Evaluation Of Remote Sensing Based Terrestrial Productivity From MODIS Using Regional Tower Eddy Flux Network Observations
F. A. Heinsch, M. S. Zhao, S. W. Running, J. S. Kimball, R. R. Nemani, K. J. Davis, P. V. Bolstad, B. D. Cook, A. R. Desai, D. M. Ricciuto, B. E. Law, W. C. Oechel, H. Kwon, H. Luo, S. C. Wofsy, A. L. Dunn, J. W. Munger, D. D. Baldocchi, L. Xu, D. Y. Hollinger, A. D. Richardson, P. C. Stoy, M. B. S. Siqueira, R. K. Monson, S. P. Burns, L. B. Flanagan

The Moderate Resolution Spectroradiometer (MODIS) sensor has provided near real-time estimates of gross primary production (GPP) since March 2000. We compare four years (2000 to 2003) of satellite-based calculations of GPP with tower eddy CO2 flux-based estimates across diverse land cover types and climate regimes. We …


Journal: IEEE Transactions On Geoscience And Remote Sensing, Volume 44 (7): 1908-1925 (2006). DOI: 10.1109/tgrs.2005.853936 Sites: US-Me4, US-Me5

Late-Summer Carbon Fluxes From Canadian Forests And Peatlands Along An East-–West Continental Transect
Coursolle, C., Margolis, H. A., Barr, A. G., Black, T. A., Amiro, B. D., McCaughey, J. H., Flanagan, L. B., Lafleur, P. M., Roulet, N. T., Bourque, C. P., Arain, M. A., Wofsy, S. C., Dunn, A., Morgenstern, K., Orchansky, A. L., Bernier, P. Y., Chen, J. M., Kidston, J., Saigusa, N., Hedstrom, N.

Net ecosystem productivity (NEP) during August 2003 was measured by using eddy covariance above 17 forest and 3 peatland sites along an east–west continental-scale transect in …


Journal: Canadian Journal Of Forest Research, Volume 36 (3): 783-800 (2006). DOI: 10.1139/x05-270 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Let, CA-Man, CA-SJ2, CA-TP1, CA-TP3, CA-TP4, CA-WP1

A Distinct Seasonal Pattern Of The Ratio Of Soil Respiration To Total Ecosystem Respiration In A Spruce-Dominated Forest
Davidson, E. A., Richardson, A. D., Savage, K. E., Hollinger, D. Y.

Annual budgets and fitted temperature response curves for soil respiration and ecosystem respiration provide useful information for partitioning annual carbon budgets of ecosystems, …


Journal: Global Change Biology, Volume 12 (2): 230-239 (2006). DOI: 10.1111/j.1365-2486.2005.01062.x Sites: US-Ho1, US-Ho2, US-Ho3

Combining Meteorology, Eddy Fluxes, Isotope Measurements, And Modeling To Understand Environmental Controls Of Carbon Isotope Discrimination At The Canopy Scale
Aranibar, J. N., Berry, J. A., Riley, W. J., Pataki, D. E., Law, B. E., Ehleringer, J. R.

Estimates of terrestrial carbon isotope discrimination are useful to quantify the terrestrial carbon sink. Carbon isotope discrimination by terrestrial ecosystems may vary on seasonal and interannual time frames, because it is affected by processes (e.g. photosynthesis, stomatal conductance, and respiration) that respond to variable …


Journal: Global Change Biology, Volume 12 (4): 710-730 (2006). DOI: 10.1111/j.1365-2486.2006.01121.x Sites: US-Me4

A Diagnostic Carbon Flux Model To Monitor The Effects Of Disturbance And Interannual Variation In Climate On Regional NEP
Turner, D. P., Ritts, W. D., Styles, J. M., Yang, Z., Cohen, W. B., Law, B. E., Thornton, P. E.

Net ecosystem production (NEP) was estimated over a 10.9 × 104 km2 forested region in western Oregon USA for 2 yr (2002–2003) using a combination of remote sensing, distributed meteorological data, and a carbon cycle model (CFLUX). High spatial resolution satellite data (Landsat, 30 m) provided information …


Journal: Tellus Series B-Chemical and Physical Meteorology, Volume 58 (5): 476-490 (2006). DOI: 10.1111/j.1600-0889.2006.00221.x Sites: US-Me2

Soil Moisture Dynamics In An Eastern Amazonian Tropical Forest
Bruno, R. D., da Rocha, H. R., de Freitas, H. C., Goulden, M. L., Miller, S. D.

We used frequency-domain reflectometry to make continuous, high-resolution measurements for 22 months of the soil moisture to a depth of 10 m in an Amazonian rain forest. We then used these data to determine how soil moisture varies on diel, seasonal and multi-year timescales, and to better understand the quantitative and mechanistic …


Journal: Hydrological Processes, Volume 20 (12): 2477-2489 (2006). DOI: 10.1002/hyp.6211 Sites: BR-Sa3

Vertical Partitioning Of CO2 Production Within A Temperate Forest Soil
Davidson, E. A., Savage, K. E., Trumbore, S. E., Borken, W.

The major driving factors of soil CO2 production – substrate supply, temperature, and water content – vary vertically within the soil profile, with the greatest …


Journal: Global Change Biology, Volume 12 (6): 944-956 (2006). DOI: 10.1111/j.1365-2486.2005.01142.x Sites: US-LPH

Seasonal Measurements Of Acetone And Methanol: Abundances And Implications For Atmospheric Budgets
Schade, G. W., Goldstein, A. H.

Acetone and methanol have been measured hourly at a rural mountain site in California for a full year, providing a unique data set for analyzing the factors controlling their seasonal cycles. Their mixing ratios showed clear maxima in summer and late spring respectively, and were mostly correlated with atmospheric temperature with …


Journal: Global Biogeochemical Cycles, Volume 20 (1): 1-10 (2006). DOI: 10.1029/2005gb002566 Sites: US-Blo

Ecohydrological Impacts Of Woody-Plant Encroachment: Seasonal Patterns Of Water And Carbon Dioxide Exchange Within A Semiarid Riparian Environment
SCOTT, R. L., HUXMAN, T. E., WILLIAMS, D. G., GOODRICH, D. C.

Across many dryland regions, historically grass-dominated ecosystems have been encroached upon by woody-plant species. In this paper, we compare ecosystem water and
carbon dioxide (CO2) fluxes over a grassland, a grassland–shrubland mosaic, and a fully
developed woodland to evaluate potential consequences of woody-plant encroachment
on …


Journal: Global Change Biology, Volume 12 (2): 311-324 (2006). DOI: 10.1111/j.1365-2486.2005.01093.x Sites: US-LS1

Modeling Evapotranspiration In Arctic Coastal Plain Ecosystems Using A Modified BIOME-BGC Model
Engstrom, R., Hope, A., Kwon, H., Harazono, Y., Mano, M., Oechel, W.

Modeling evapotranspiration (ET) in Arctic coastal plain ecosystems is challenging owing to the unique conditions present in this environment, including permafrost, nonvascular vegetation, and a large standing dead vegetation component. In this study the ecosystem process model, BIOME-BGC, was adapted to represent these unique conditions …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 111 (G02021): n/a-n/a (2006). DOI: 10.1029/2005JG000102 Sites: US-Brw