Publications

Publications Found: 1437

Modelling Night-Time Ecosystem Respiration By A Constrained Source Optimization Method
Lai, C., Katul, G., Butnor, J., Ellsworth, D., Oren, R.

One of the main challenges to quantifying ecosystem carbon budgets is properly quantifying the magnitude of night-time ecosystem respiration. Inverse Lagrangian dispersion …


Journal: Global Change Biology, Volume 8 (2): 124-141 (2002). DOI: 10.1046/j.1354-1013.2001.00447.x Sites: US-Dk3

Biometric And Eddy-Covariance Based Estimates Of Annual Carbon Storage In Five Eastern North American Deciduous Forests
Curtis, P. S., Hanson, P. J., Bolstad, P., Barford, C., Randolph, J., Schmid, H., Wilson, K. B.

Quantifying net carbon (C) storage by forests is a necessary step in the validation of carbon sequestration estimates and in assessing the possible role of these ecosystems in offsetting fossil fuel emissions. In eastern North America, five sites were established in deciduous …


Journal: Agricultural And Forest Meteorology, Volume 113 (1-4): 3-19 (2002). DOI: 10.1016/s0168-1923(02)00099-0 Sites: US-Ha1, US-MMS, US-UMB, US-WCr

Energy Budget Above A High-Elevation Subalpine Forest In Complex Topography
Turnipseed, A., Blanken, P., Anderson, D., Monson, R.

Components of the energy budget were measured above a subalpine coniferous forest over two complete annual cycles. Sensible and latent heat fluxes were measured by eddy covariance. Bowen ratios ranged from 0.7 to 2.5 in the summer (June–September) depending upon the availability of soil water, but were considerably higher (∼3–6) …


Journal: Agricultural And Forest Meteorology, Volume 110 (3): 177-201 (2002). DOI: 10.1016/s0168-1923(01)00290-8 Sites: US-NR1

Contrasting Soil Respiration In Young And Old-Growth Ponderosa Pine Forests
Irvine, J., Law, B. E.

Three years of fully automated and manual measurements of soil CO2 efflux, soil moisture and temperature were used to explore the diel, seasonal and inter-annual patterns of soil efflux in an old-growth (250-year-old, O site) and recently regenerating (14-year-old, Y site) ponderosa pine forest in central …


Journal: Global Change Biology, Volume 8 (12): 1183-1194 (2002). DOI: 10.1046/j.1365-2486.2002.00544.x Sites: US-Me4, US-Me5

Water Limitations To Carbon Exchange In Old-Growth And Young Ponderosa Pine Stands
Irvine, J., Law, B. E., Anthoni, P. M., Meinzer, F. C.
We investigated the impact of seasonal soil water deficit on the processes driving net ecosystem exchange of carbon (NEE) in old-growth and recently regenerating ponderosa pine (Pinus ponderosa Doug. ex Laws.) stands in Oregon. We measured seasonal patterns of transpiration, canopy conductance and …


Journal: Tree Physiology, Volume 22 (2-3): 189-196 (2002). DOI: 10.1093/treephys/22.2-3.189 Sites: US-Me4

How The Environment, Canopy Structure And Canopy Physiological Functioning Influence Carbon, Water And Energy Fluxes Of A Temperate Broad-Leaved Deciduous Forest–An Assessment With The Biophysical Model CANOAK
Baldocchi, D. D., Wilson, K. B., Gu, L.
This paper focuses on how canopy structure, its physiological functioning and the environment interact to control and drive the exchange of carbon dioxide (CO2) and water vapor between a temperate forest stand and the atmosphere. First, we present an overview of how temporal and spatial variations …


Journal: Tree Physiology, Volume 22 (15-16): 1065-1077 (2002). DOI: 10.1093/treephys/22.15-16.1065 Sites: US-WBW

Carbon Sequestration In A High-Elevation, Subalpine Forest
Monson, R. K., Turnipseed, A. A., Sparks, J. P., Harley, P. C., Scott-Denton, L. E., Sparks, K., Huxman, T. E.

We studied net ecosystem CO2 exchange (NEE) dynamics in a high-elevation, subalpine forest in Colorado, USA, over a two-year period. Annual carbon sequestration for the forest was 6.71 mol C m−2(80.5 g C m−2) for the year between November 1, 1998 and October 31, 1999, and 4.80 mol C m−2(57.6 g C m−2) …


Journal: Global Change Biology, Volume 8 (5): 459-478 (2002). DOI: 10.1046/j.1365-2486.2002.00480.x Sites: US-NR1

Environmental Controls On Carbon Dioxide Flux From Black Spruce Coarse Woody Debris
Wang, C., Bond-Lamberty, B., Gower, S.

Carbon dioxide flux from coarse woody debris (CWD) is an important source of CO2 in forests with moderate to large amounts of CWD. A process-based understanding of environmental controls on CWD CO2 flux (RCWD) is needed to accurately model carbon exchange between …


Journal: Oecologia, Volume 132 (3): 374-381 (2002). DOI: 10.1007/s00442-002-0987-4 Sites: CA-NS3, CA-NS5, CA-NS6

Sensitivity Of Large-Footprint Lidar To Canopy Structure And Biomass In A Neotropical Rainforest
Drake, J. B., Dubayah, R. O., Knox, R. G., Clark, D. B., Blair, J.

Accurate estimates of the total biomass in terrestrial vegetation are important for carbon dynamics studies at a variety of scales. Although aboveground biomass is difficult to quantify over large areas using traditional techniques, lidar remote sensing holds great promise for biomass estimation because it directly measures components …


Journal: Remote Sensing Of Environment, Volume 81 (2-3): 378-392 (2002). DOI: 10.1016/s0034-4257(02)00013-5 Sites: CR-Lse

Inversion Of Net Ecosystem CO2 Flux Measurements For Estimation Of Canopy PAR Absorption
Hanan, N. P., Burba, G., Verma, S. B., Berry, J. A., Suyker, A., Walter-Shea, E. A.

The fractional absorption of photosynthetically active radiation (fPAR) is frequently a key variable in models describing terrestrial ecosystem–atmosphere interactions, carbon uptake, growth and biogeochemistry. We present a novel approach to the estimation of the fraction of incident photosynthetically active …


Journal: Global Change Biology, Volume 8 (6): 563-574 (2002). DOI: 10.1046/j.1365-2486.2002.00488.x Sites: US-Pon, US-Shd