Publications

Publications Found: 1437

Modelling The Discrimination Of 13CO2 Above And Within A Temperate Broad-Leaved Forest Canopy On Hourly To Seasonal Time Scales
Baldocchi, D. D., Bowling, D. R.

Fluxes and concentrations of carbon dioxide and 13CO2 provide information about ecosystem physiological processes and their response to environmental …


Journal: Plant, Cell And Environment, Volume 26 (2): 231-244 (2003). DOI: 10.1046/j.1365-3040.2003.00953.x Sites: US-WBW

Diurnal Centroid Of Ecosystem Energy And Carbon Fluxes At FLUXNET Sites
Wilson, K. B., Baldocchi, D., Falge, E., Aubinet, M., Berbigier, P., Bernhofer, C., Dolman, H., Field, C., Goldstein, A., Granier, A., Hollinger, D., Katul, G., Law, B. E., Meyers, T., Moncrieff, J., Monson, R., Tenhunen, J., Valentini, R., Verma, S., Wofsy, S.

Data from a network of eddy covariance stations in Europe and North America (FLUXNET) were analyzed to examine the diurnal patterns of surface energy and carbon fluxes during the summer period across a range of ecosystems and climates. Diurnal trends were quantified by assessing the time of day surface fluxes and meteorological variable …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 108 (D21): n/a-n/a (2003). DOI: 10.1029/2001jd001349 Sites: US-Blo

Contribution Of Soil Respiration In Tropical, Temperate, And Boreal Forests To The O18 Enrichment Of Atmospheric O2
Angert, A., Barkan, E., Barnett, B., Brugnoli, E., Davidson, E. A., Fessenden, J., Maneepong, S., Panapitukkul, N., Randerson, J. T., Savage, K., Yakir, D., Luz, B.

The 18O content of atmospheric O2 is an important tracer for past changes in the biosphere. Its quantitative use depends on knowledge of the discrimination against 18O associated with the various Oconsumption processes. Here we evaluated, for the first time, the in situ 18O …


Journal: Global Biogeochemical Cycles, Volume 17 (3): n/a-n/a (2003). DOI: 10.1029/2003gb002056 Sites: US-LPH

Changes In Carbon Storage And Fluxes In A Chronosequence Of Ponderosa Pine
Law, B. E., Sun, O. J., Campbell, J., Van Tuyl, S., Thornton, P. E.

Forest development following stand-replacing disturbance influences a variety of ecosystem processes including carbon exchange with the atmosphere. On a series of ponderosa pine (Pinius ponderosa var. Laws.) stands ranging from 9 to> 300 years in central Oregon, USA, we used biological measurements to estimate carbon …


Journal: Global Change Biology, Volume 9 (4): 510-524 (2003). DOI: 10.1046/j.1365-2486.2003.00624.x Sites: US-Me4, US-Me5

Regional-Scale Measurements Of CH4 Exchange From A Tall Tower Over A Mixed Temperate/Boreal Lowland And Wetland Forest
Werner, C., Davis, K., Bakwin, P., Yi, C., Hurst, D., Lock, L.

The biosphere–atmosphere exchange of methane (CH4) was estimated for a temperate/boreal lowland and wetland forest ecosystem in northern Wisconsin for 1997–1999 using the modified Bowen ratio (MBR) method. Gradients of CH4 and CO2 and CO2 flux were measured on the 447-m WLEF-TV tower …


Journal: Global Change Biology, Volume 9 (9): 1251-1261 (2003). DOI: 10.1046/j.1365-2486.2003.00670.x Sites: US-Los, US-PFa, US-WCr

Direct And Indirect Effects Of Elevated CO2 On Transpiration From Quercus Myrtifolia In A Scrub-Oak Ecosystem
Li, J., Dugas, W. A., Hymus, G. J., Johnson, D. P., Hinkle, C. R., Drake, B. G., Hungate, B. A.

Elevated atmospheric carbon dioxide (Ca) usually reduces stomatal conductance, but the effects on plant transpiration in the field are not well understood. Using …


Journal: Global Change Biology, Volume 9 (1): 96-105 (2003). DOI: 10.1046/j.1365-2486.2003.00557.x Sites: US-KS2

Gas-Phase Chemistry Dominates O3 Loss To A Forest, Implying A Source Of Aerosols And Hydroxyl Radicals To The Atmosphere
Kurpius, M. R., Goldstein, A. H.

Tropospheric ozone (O3) effectively deposits to forested ecosystems but the fate of O3 within the forest canopy is unresolved. We partitioned total measured ecosystem daytime O3 deposition to a ponderosa pine (Pinus ponderosa) forest into its major loss pathways; stomatal uptake, non-stomatal …


Journal: Geophysical Research Letters, Volume 30 (7): n/a-n/a (2003). DOI: 10.1029/2002gl016785 Sites: US-Blo

Assessing Soil CO2 Efflux Using Continuous Measurements Of CO2 Profiles In Soils With Small Solid-State Sensors
Tang, J., Baldocchi, D. D., Qi, Y., Xu, L.

This paper describes a new method to monitor continuously soil CO2 profiles using small solid-state CO2 sensors buried at different depths of the soil. Based on the measurement of soil CO2 profile and a gaseous diffusivity model, we estimated …


Journal: Agricultural And Forest Meteorology, Volume 118 (3-4): 207-220 (2003). DOI: 10.1016/s0168-1923(03)00112-6 Sites: US-Ton

Cross Validation Of Open-Top Chamber And Eddy Covariance Measurements Of Ecosystem CO2 Exchange In A Florida Scrub-Oak Ecosystem
Dore, S., Hymus, G. J., Johnson, D. P., Hinkle, C. R., Valentini, R., Drake, B. G.

Simultaneous measurements of net ecosystem CO2 exchange (NEE) were made in a Florida scrub-oak ecosystem in August 1997 and then every month between April 2000 to …


Journal: Global Change Biology, Volume 9 (1): 84-95 (2003). DOI: 10.1046/j.1365-2486.2003.00561.x Sites: US-KS1, US-KS2

Novel Technique For Remote Estimation Of CO2 Flux In Maize
Gitelson, A. A., Verma, S. B, Rundquist, D. C., Keydan, G., Leavitt, B., Arkebauer, T. J., Burba, G. G., Suyker, A. E.

[1] There is considerable interest in assessing the magnitude of carbon sources and sinks for agricultural lands, grasslands, and forests. In this paper, we propose a novel …


Journal: Geophysical Research Letters, Volume 30 (9): 1486-n/a (2003). DOI: 10.1029/2002GL016543 Sites: US-Ne1, US-Ne2