Publications

Publications Found: 1446

Hurricane Disturbance And Recovery Of Energy Balance, CO2 Fluxes And Canopy Structure In A Mangrove Forest Of The Florida Everglades
Barr, J. G., Engel, V., Smith, T. J., Fuentes, J. D.

Eddy covariance (EC) estimates of carbon dioxide (CO2) fluxes and energy balance are examined to investigate the functional responses of a mature mangrove forest to a disturbance generated by Hurricane Wilma on October 24, 2005 in the Florida Everglades. At the EC site, high winds from the hurricane caused nearly 100% …


Journal: Agricultural And Forest Meteorology, Volume 153: 54-66 (2012). DOI: 10.1016/j.agrformet.2011.07.022 Sites: US-Skr

Influence Of Stand Age On The Magnitude And Seasonality Of Carbon Fluxes In Canadian Forests
Coursolle, C., Margolis, H., Giasson, M., Bernier, P., Amiro, B., Arain, M., Barr, A., Black, T., Goulden, M., McCaughey, J., Chen, J., Dunn, A., Grant, R., Lafleur, P.

Proper management and accounting of forest carbon requires good knowledge of how disturbances and climate affect the carbon dynamics of different stand types. We have investigated such relationships by measuring, over a 5-year period (2003–2007), the net ecosystem productivity (NEP), gross ecosystem productivity …


Journal: Agricultural And Forest Meteorology, Volume 165: 136-148 (2012). DOI: 10.1016/j.agrformet.2012.06.011 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4

A Comparison Of Three Methods To Estimate Evapotranspiration In Two Contrasting Loblolly Pine Plantations: Age-Related Changes In Water Use And Drought Sensitivity Of Evapotranspiration Components
Domec, J., Sun, G., Noormets, A., Gavazzi, M. J., Treasure, E. A., Cohen, E., Swenson, J. J., McNulty, S. G., King, J. S.

Increasing variability of rainfall patterns requires detailed understanding of the pathways of water loss from ecosystems to optimize carbon uptake and management choices. In the current study we characterized the usability of three alternative methods of different rigor for quantifying stand-level evapotranspiration (ET), partitioned …


Journal: Forest Science, Volume 58 (5): 497-512 (2012). DOI: 10.5849/forsci.11-051 Sites: US-NC1, US-NC2

Modeling Energy And Carbon Fluxes In A Heterogeneous Oak Woodland: A Three-Dimensional Approach
Kobayashi, H., Baldocchi, D. D., Ryu, Y., Chen, Q., Ma, S., Osuna, J. L., Ustin, S. L.

Most land surface and ecosystem models assume that a vegetated canopy can be abstracted as a turbid medium when such models compute mass, energy, and carbon exchange. However, those models fail to simulate radiation environments in heterogeneous landscapes. This study aims to couple a spatially explicit three-dimensional (3D) shortwave …


Journal: Agricultural And Forest Meteorology, Volume 152: 83-100 (2012). DOI: 10.1016/j.agrformet.2011.09.008 Sites: US-Ton

Modelling Contrasting Responses Of Wetland Productivity To Changes In Water Table Depth
Grant, R.F., Desai, A.R.,  Sulman, B.N.

Responses of wetland productivity to changes in water table depth (WTD)
are controlled by complex interactions among several soil and plant
processes, and hence are site-specific rather than general in nature.
Hydrological controls on wetland productivity were studied by
representing …


Journal: Biogeosciences, Volume 9 (11): 4215-4231 (2012). DOI: 10.5194/bg-9-4215-2012 Sites: US-Los

Are Rain-Induced Ecosystem Respiration Pulses Enhanced By Legacies Of Antecedent Photodegradation In Semi-Arid Environments?
Ma, S., Baldocchi, D. D., Hatala, J. A., Detto, M., Curiel Yuste, J.

Ecosystem respiration (Reco) is highly variable in semiarid ecosystems. After a period of drought, Reco can jump to a high value in response to rain events, and afterward it decays exponentially with time. To better understand the timing, size, and duration of rain-induced …


Journal: Agricultural And Forest Meteorology, Volume 154-155: 203-213 (2012). DOI: 10.1016/j.agrformet.2011.11.007 Sites: US-Snd

Nocturnal Subcanopy Flow Regimes And Missing Carbon Dioxide
Vickers, D., Irvine, J., Martin, J. G., Law, B. E.

Two distinct nocturnal subcanopy flow regimes are observed beneath a tall (16 m) open pine forest canopy. The first is characterized by weaker mixing, stronger stability, westerly downslope flow decoupled from the flow above the canopy and much smaller than expected …


Journal: Agricultural And Forest Meteorology, Volume 152: 101-108 (2012). DOI: 10.1016/j.agrformet.2011.09.004 Sites: US-Me2

Gross Ecosystem Photosynthesis Causes A Diurnal Pattern In Methane Emission From Rice
Hatala, J. A., Detto, M., Baldocchi, D. D.

Understanding the relative contribution of environmental and substrate controls on rice paddy methanogenesis is critical for developing mechanistic models of landscape-scale methane (CH4) flux. A diurnal pattern in observed rice paddy CH4 flux has been attributed to fluctuations in soil temperature physically …


Journal: Geophysical Research Letters, Volume 39 (6): n/a-n/a (2012). DOI: 10.1029/2012gl051303 Sites: US-Twt

Pulse Emissions Of Carbon Dioxide During Snowmelt At A High-Elevation Site In Northern Arizona, U.S.A.
Sullivan, B. W., Dore, S., Montes-Helu, M. C., Kolb, T. E., Hart, S. C.

The paradigm that winter is a dormant period of soil biogeochemical activity in high elevation or high latitude ecosystems has been amply refuted by recent research. Carbon dioxide (CO2) released from cold or snow-covered soil is a substantial component of total annual ecosystem carbon fluxes. Recent investigations have …


Journal: Arctic, Antarctic, And Alpine Research, Volume 44 (2): 247-254 (2012). DOI: 10.1657/1938-4246-44.2.247 Sites: US-Fwf

The Impact Of Induced Drought On Transpiration And Growth In A Temperate Pine Plantation Forest
MacKay, S. L., Arain, M. A., Khomik, M., Brodeur, J. J., Schumacher, J., Hartmann, H., Peichl, M.

The effects of early growing season droughts on water and carbon balances in conifer forests are poorly understood. In this study, the response of canopy transpiration (Ec) and growth …


Journal: Hydrological Processes, Volume 26 (12): 1779-1791 (2012). DOI: 10.1002/hyp.9315 Sites: CA-TP4