Publications

Publications Found: 1378

A Multiscale And Multidisciplinary Investigation Of Ecosystem–Atmosphere CO2 Exchange Over The Rocky Mountains Of Colorado
Sun, J., Oncley, S. P., Burns, S. P., Stephens, B. B., Lenschow, D. H., Campos, T., Watt, A. S., Monson, R. K., Moore, D. J., Hu, J., Tschudi, M., Schimel, D. S., Aulenbach, S., Sacks, W. J., De Wekker, S. F., Lai, C., Lamb, B., Allwine, E., Coons, T., Ojima, D., Ellsworth, P. Z., Sternberg, L. S., Zhong, S., Clements, C., Anderson, D. E.

A significant fraction of Earth consists of mountainous terrain. However, the question of how to monitor the surface–atmosphere carbon exchange over complex terrain has not been fully explored. This article reports on studies by a team of investigators from U.S. universities and research institutes who carried out a multiscale …


Journal: Bulletin Of The American Meteorological Society, Volume 91 (2): 209-230 (2010), ISBN . DOI: 10.1175/2009BAMS2733.1 Sites: US-NR1

CO2 Fluxes At Northern Fens And Bogs Have Opposite Responses To Inter-Annual Fluctuations In Water Table
Sulman, B. N., Desai, A. R., Saliendra, N. Z., Lafleur, P. M., Flanagan, L. B., Sonnentag, O., Mackay, D. S., Barr, A. G., van der Kamp, G.

This study compares eddy-covariance measurements of carbon dioxide fluxes at six northern temperate and boreal peatland sites in Canada and the northern United States of America, representing both bogs and fens. The two peatland types had opposite responses of gross ecosystem photosynthesis (GEP) and ecosystem respiration (ER) to …


Journal: Geophysical Research Letters, Volume 37 (19): n/a-n/a (2010), ISBN . DOI: 10.1029/2010GL044018 Sites: US-Los

Climatic Controls Of Interannual Variability In Regional Carbon Fluxes From Top-Down And Bottom-Up Perspectives
Desai, A. R., Helliker, B. R., Moorcroft, P. R., Andrews, A. E., Berry, J. A.

Observations of regional net ecosystem exchange (NEE) of CO2 for 1997–2007 were analyzed for climatic controls on interannual variability (IAV). Quantifying IAV of regional (104–106 km2) NEE over long time periods is key to understanding potential feedbacks between climate and the carbon …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G2): n/a-n/a (2010), ISBN . DOI: 10.1029/2009JG001122 Sites: US-PFa

Evaluation Of Methods For Estimating Soil Carbon Dioxide Efflux Across A Gradient Of Forest Disturbance
Sullivan, B. W., Dore, S., Kolb, T. E., Hart, S. C., Montes-Helu, M. C.

Better understanding of variation in soil carbon dioxide (CO2) efflux caused by measurement techniques is needed, especially over gradients of site disturbance, …


Journal: Global Change Biology, Volume 16: 2449-2460 (2010), ISBN . DOI: 10.1111/j.1365-2486.2009.02139.x Sites: US-Fuf, US-Fwf

Energy And Water Balance Of Two Contrasting Loblolly Pine Plantations On The Lower Coastal Plain Of North Carolina, USA
Sun, G., Noormets, A., Gavazzi, M., McNulty, S., Chen, J., Domec, J., King, J., Amatya, D., Skaggs, R.

During 2005–2007, we used the eddy covariance and associated hydrometric methods to construct energy and water budgets along a chronosequence of loblolly pine (Pinus taeda) plantations that included a mid-rotation stand (LP) (i.e., 13–15 years old) and a recently established stand on a clearcut site (CC) (i.e., 4–6 …


Journal: Forest Ecology And Management, Volume 259 (7): 1299-1310 (2010), ISBN . DOI: 10.1016/j.foreco.2009.09.016 Sites: US-NC1, US-NC2

Groundwater Uptake By Woody Vegetation In A Semiarid Oak Savanna
Miller, G. R., Chen, X., Rubin, Y., Ma, S., Baldocchi, D. D.

Groundwater can serve as an important resource for woody vegetation in semiarid landscapes, particularly when soil water is functionally depleted and unavailable to plants. This study examines the uptake of groundwater by deciduous blue oak trees (Quercus douglasii) in a California oak savanna. Here we present a suite of …


Journal: Water Resources Research, Volume 46 (10): n/a-n/a (2010), ISBN . DOI: 10.1029/2009wr008902 Sites: US-Ton

Carbon Dioxide, Methane, And Nitrous Oxide Exchanges In An Age-Sequence Of Temperate Pine Forests
Peichl, M., Arain, M.A., Ullah, S., Moore, T.

We investigated soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) exchanges in an age-sequence (4, 17, 32, 67 years old) of …


Journal: Global Change Biology, Volume 16 (8): 2198-2212 (2010), ISBN . DOI: 10.1111/j.1365-2486.2009.02066.x Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4

Runoff And Erosional Responses To A Drought-Induced Shift In A Desert Grassland Community Composition
Polyakov, V.O., Nearing, M.A., Stone, J.J., Hamerlynck, E.P., Nichols, M.H., Holifield Collins, C.D., Scott, R.L.

This study investigates how drought-induced change in semiarid grassland community affected runoff and sediment yield in a small watershed in southeast Arizona, USA. Three distinct periods in ecosystem composition and associated runoff and sediment yield were identified according to dominant species: native bunchgrass (1974–2005), …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G4): n/a-n/a (2010), ISBN . DOI: 10.1029/2010jg001386 Sites: US-Wkg

Influence Of C4 Vegetation On 13CO2 Discrimination And Isoforcing In The Upper Midwest, United States
Griffis, T. J., Baker, J. M., Sargent, S. D., Erickson, M., Corcoran, J., Chen, M., Billmark, K.

Agricultural crops with a C4 photosynthetic pathway rapidly expanded across North America as early as 800 A.D. Their distribution continues to expand globally as demands for food and biofuel production …


Journal: Global Biogeochemical Cycles, Volume 24 (4): n/a-n/a (2010), ISBN . DOI: 10.1029/2009GB003768 Sites: US-Ro1, US-Ro2, US-Ro3, US-Ro4

Carbon Dioxide Exchange In A Semidesert Grassland Through Drought-Induced Vegetation Change
Scott, R.L., Hamerlynck, E.P., Jenerette, G.D., Moran, M.S., Barron-Gafford, G.

Global warming may intensify the hydrological cycle and lead to increased drought severity and duration, which could alter plant community structure and subsequent ecosystem water and carbon dioxide cycling. We report on the net ecosystem exchange of carbon dioxide (NEE) of a semidesert grassland through a severe drought which drove …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G3): n/a-n/a (2010), ISBN . DOI: 10.1029/2010jg001348 Sites: US-Wkg