Publications

Publications Found: 1437

Eco-Hydrological Controls On Summertime Convective Rainfall Triggers
Juang, J., Katul, G. G., Porporato, A., Stoy, P. C., Siqueira, M. S., Detto, M., Kim, H., Oren, R.

Triggers of summertime convective rainfall depend on numerous interactions and feedbacks, often compounded by spatial variability in soil moisture and its impacts on vegetation …


Journal: Global Change Biology, Volume 13 (4): 887-896 (2007). DOI: 10.1111/j.1365-2486.2007.01315.x Sites: US-Dk3

Concentrations And Fluxes Of Dissolved Organic Carbon In An Age-Sequence Of White Pine Forests In Southern Ontario, Canada
Peichl, M., Moore, T. R., Arain, M. A., Dalva, M., Brodkey, D., McLaren, J.

We determined concentrations and fluxes of dissolved organic carbon (DOC) in precipitation, throughfall, forest floor and mineral soil leachates from June 2004 to May 2006 across an age-sequence (2-, 15-, 30-, and 65-year-old) of white pine (Pinus strobus L.) forests in southern Ontario, Canada. …


Journal: Biogeochemistry, Volume 86 (1): 1-17 (2007). DOI: 10.1007/s10533-007-9138-7 Sites: CA-TP1

Comparison Of Carbon Dioxide Fluxes Over Three Boreal Black Spruce Forests In Canada
Bergeron, O., Margolis, H. A., Black, T. A., Coursolle, C., Dunn, A. L., Barr, A. G., Wofsy, S. C.

Although mature black spruce forests are a dominant cover type in the boreal forest of North America, it is not clear how their carbon (C) budgets vary across the continent. …


Journal: Global Change Biology, Volume 13 (1): 89-107 (2007). DOI: 10.1111/j.1365-2486.2006.01281.x Sites: CA-Man, CA-Obs, CA-Qfo

Inter-Annual Variability In Carbon Dioxide Exchange Of An Oak/Grass Savanna And Open Grassland In California
Ma, S., Baldocchi, D. D., Xu, L., Hehn, T.

To understand the dynamics of ecosystem carbon cycling, CO2 fluxes were measured over and under an oak–grass savanna and over a proximate grassland in California. The measurements were made from 2000 to 2006 using the eddy covariance technique. Annual net carbon exchange (NEE) ranged from −155 to −56 gC m−2 year−1


Journal: Agricultural And Forest Meteorology, Volume 147 (3-4): 157-171 (2007). DOI: 10.1016/j.agrformet.2007.07.008 Sites: US-Ton, US-Var

Hydrologic And Atmospheric Controls On Initiation Of Convective Precipitation Events
Juang, J., Porporato, A., Stoy, P. C., Siqueira, M. S., Oishi, A. C., Detto, M., Kim, H., Katul, G. G.

The pathway to summertime convective precipitation remains a vexing research problem because of the nonlinear feedback between soil moisture content and the atmosphere. Understanding this feedback is important to the southeastern U. S. region, given the high productivity of the timberland area and the role of summertime convective …


Journal: Water Resources Research, Volume 43 (3): n/a-n/a (2007). DOI: 10.1029/2006WR004954 Sites: US-Dk2

Ecosystem Water Use Efficiency In A Semiarid Shrubland And Grassland Community
Emmerich, W. E.

Ecosystem water use efficiency (EWUE) is defined as the net carbon uptake per amount of water lost from the ecosystem and is a useful measure of the functionality in semiarid shrub and grassland communities. C4 grasses have higher water use efficiency (WUE) than do C3 shrubs, although it has been postulated …


Journal: Rangeland Ecology & Management, Volume 60 (5): 464-470 (2007). DOI: 10.2111/1551-5028(2007)60[464:ewueia]2.0.co;2 Sites: US-Wkg

Changes In Vegetation Condition And Surface Fluxes During NAME 2004
Watts, C. J., Scott, R. L., Garatuza-Payan, J., Rodriguez, J. C., Prueger, J. H., Kustas, W. P., Douglas, M.

The vegetation in the core region of the North American monsoon (NAM) system changes dramatically after the onset of the summer rains so that large changes may be expected in the surface fluxes of radiation, heat, and moisture. Most of this region lies in the rugged terrain of western Mexico and very few measurements of these fluxes …


Journal: Journal Of Climate, Volume 20 (9): 1810-1820 (2007). DOI: 10.1175/jcli4088.1 Sites: US-Whs, US-Wkg

Remotely Sensed Measurements Of Forest Structure And Fuel Loads In The Pinelands Of New Jersey
SKOWRONSKI, N., CLARK, K., NELSON, R., HOM, J., PATTERSON, M.

We used a single-beam, first return profiling LIDAR (Light Detection and Ranging) measurements of canopy height, intensive biometric measurements in plots, and Forest Inventory and Analysis (FIA) data to quantify forest structure and ladder fuels (defined as vertical fuel continuity between the understory and canopy) in the New Jersey …


Journal: Remote Sensing Of Environment, Volume 108 (2): 123-129 (2007). DOI: 10.1016/j.rse.2006.09.032 Sites: US-Ced, US-Slt

Intraseasonal Variation In Water And Carbon Dioxide Flux Components In A Semiarid Riparian Woodland
Yepez, E. A., Scott, R. L., Cable, W. L., Williams, D. G.

We investigated how the distribution of precipitation over a growing season influences the coupling
of carbon and water cycle components in a semiarid floodplain woodland dominated by the deep-rooted velvet mesquite (Prosopis velutina). Gross ecosystem production (GEP) and ecosystem respiration (Reco) were frequently uncoupled because …


Journal: Ecosystems, Volume 10 (7): 1100-1115 (2007). DOI: 10.1007/s10021-007-9079-y Sites: US-CMW

Filtering Airborne Laser Scanning Data With Morphological Methods
Chen, Q., Gong, P., Baldocchi, D., Xie, G.

Filtering methods based on morphological operations have been developed in some previous studies. The biggest challenge for these methods is how to keep the terrain features unchanged while using large window sizes for the morphological opening. Zhang et al. (2003) tried to achieve this goal, but their method required the assumption …


Journal: Photogrammetric Engineering & Remote Sensing, Volume 73 (2): 175-185 (2007). DOI: 10.14358/pers.73.2.175 Sites: US-Ton