Publications

Publications Found: 1437

Interannual Variability Of The Carbon Balance Of Three Different-Aged Douglas-Fir Stands In The Pacific Northwest
Krishnan, P., Black, T. A., Jassal, R. S., Chen, B., Nesic, Z.

The seasonal and interannual variability of gross ecosystem photosynthesis (Pg) and
ecosystem respiration (Re), and their relationships to environmental variables and stand
characteristics were used to explain the variation of eddy-covariance-measured net
ecosystem productivity (FNEP) of three different-aged Douglas-fir stands …


Journal: Journal Of Geophysical Research, Volume 114 (G4): (2009). DOI: doi:10.1029/2008JG000912 Sites: CA-Ca1, CA-Ca2, CA-Ca3

A Cable-Borne Tram For Atmospheric Measurements Along Transects
Oncley, S. P., Schwenz, K., Burns, S. P., Sun, J., Monson, R. K.

A system to make atmospheric measurements from a moving trolley suspended by a stretched cable has been developed. At present, these measurements consist of wind velocity, temperature, humidity, and carbon dioxide concentration, though other sensors may be added. The track consists of cable segments attached to turns mounted on standard …


Journal: Journal Of Atmospheric And Oceanic Technology, Volume 26 (3): 462-473 (2009). DOI: 10.1175/2008JTECHA1158.1 Sites: US-NR1

Persistent Effects Of Fire-Induced Vegetation Change On Energy Partitioning And Evapotranspiration In Ponderosa Pine Forests
Montes-Helu, M., Kolb, T., Dore, S., Sullivan, B., Hart, S., Koch, G., Hungate, B.

We compared energy fluxes between a site converted from ponderosa pine (Pinus ponderosa) forest to sparse grassland by a severe wildfire 10 years ago and a nearby, unburned forest. We used eddy covariance and associated instruments to measure total radiation, net radiation, albedo, and fluxes of energy into latent heat, …


Journal: Agricultural And Forest Meteorology, Volume 149 (3-4): 491-500 (2009). DOI: 10.1016/j.agrformet.2008.09.011 Sites: US-Fuf, US-Fwf

Decoupling The Influence Of Leaf And Root Hydraulic Conductances On Stomatal Conductance And Its Sensitivity To Vapour Pressure Deficit As Soil Dries In A Drained Loblolly Pine Plantation
Domec, J., Noormets, A., King, J. S., Sun, G., Mcnulty, S. G., Gavazzi, M. J., Boggs, J. L., Treasure, E. A.

The study examined the relationships between whole tree hydraulic conductance (Ktree) and the conductance in roots (Kroot) and leaves …


Journal: Plant, Cell & Environment, Volume 32 (8): 980-991 (2009). DOI: 10.1111/j.1365-3040.2009.01981.x Sites: US-NC1

Comparison Of Carbon Dynamics And Water Use Efficiency Following Fire And Harvesting In Canadian Boreal Forests
Mkhabela, M., Amiro, B., Barr, A., Black, T., Hawthorne, I., Kidston, J., McCaughey, J., Orchansky, A., Nesic, Z., Sass, A., Shashkov, A., Zha, T.

Fire and harvesting are major forest renewal processes in the Canadian boreal forest. The eddy covariance method was used to compare ecosystem fluxes of carbon dioxide between harvested and burned boreal forest sites in Saskatchewan, Canada. The harvest chronosequence had …


Journal: Agricultural And Forest Meteorology, Volume 149 (5): 783-794 (2009). DOI: 10.1016/j.agrformet.2008.10.025 Sites: CA-SF1, CA-SF2, CA-SF3

Nocturnal Evapotranspiration In Eddy-Covariance Records From Three Co-Located Ecosystems In The Southeastern U.S.: Implications For Annual Fluxes
Novick, K., Oren, R., Stoy, P., Siqueira, M., Katul, G.

Nocturnal evapotranspiration (ETN) is often assumed to be negligible in terrestrial ecosystems, reflecting the common assumption that plant stomata close at night to prevent water loss from transpiration. However, recent evidence across a wide …


Journal: Agricultural And Forest Meteorology, Volume 149 (9): 1491-1504 (2009). DOI: 10.1016/j.agrformet.2009.04.005 Sites: US-Dk2, US-Dk3

Response of the carbon cycle in sub-arctic black spruce forests to climate change: Reduction of a carbon sink related to the sensitivity of heterotrophic respiration.
Ueyama, M., Harazono, Y., Kim, Y. and Tanaka, N.


Journal: Agric. Forest Meteorol., Volume 149: 582-602 (2009). DOI: Sites: US-Uaf

Contrasting Carbon Dioxide Fluxes Between A Drying Shrub Wetland In Northern Wisconsin, USA, And Nearby Forests
Sulman, B.N.,  Desai, A.R., Cook, B.D., Saliendra, N., Mackay, D.S.

Wetland biogeochemistry is strongly influenced by water and temperature dynamics, and these interactions are currently poorly represented in ecosystem and climate models. A decline in water table of approximately 30 cm was observed at a wetland in Northern Wisconsin, USA over a period from 2001–2007, which was highly correlated …


Journal: Biogeosciences, Volume 6 (6): 1115-1126 (2009). DOI: 10.5194/bg-6-1115-2009 Sites: US-Los

A Comparison Of Water And Carbon Dioxide Exchange At A Windy Alpine Tundra And Subalpine Forest Site Near Niwot Ridge, Colorado
Blanken, P. D., Williams, M. W., Burns, S. P., Monson, R. K., Knowles, J., Chowanski, K., Ackerman, T.

Eddy covariance measurements of the surface energy balance and carbon dioxide exchange above high-elevation (3,480 m above sea level) alpine tundra located near Niwot Ridge, Colorado, were compared to simultaneous measurements made over an adjacent subalpine forest over two summers and one winter, from June 9, 2007 to July 3, 2008. …


Journal: Biogeochemistry, Volume 95 (1): 61-76 (2009). DOI: 10.1007/s10533-009-9325-9 Sites: US-NR1

The Land €“Atmosphere Water Flux In The Tropics
Fisher, J.B., Malhi, Y., Bonal, D., Rocha, H.R.D., Araújo, A.C.D., Gamo, M., Goulden, M.L., Hirano, T., Huete, A.R., Kondo, H., Kumagai, T., Loescher, H.W., Miller, S., Nobre, A.D., Nouvellon, Y., Oberbauer, S.F., Panuthai, S., Roupsard, O., Saleska, S., Tanaka, K., Tanaka, N., Tu, K.P., Randow, C.V.

Tropical vegetation is a major source of global land surface evapotranspiration, and can thus play a major role in global hydrological cycles and global atmospheric circulation. Accurate prediction of tropical evapotranspiration is critical to our understanding of these processes under changing climate. We examined the controls on …


Journal: Global Change Biology, Volume 15 (11): 2694-2714 (2009). DOI: 10.1111/j.1365-2486.2008.01813.x Sites: BR-Ma2