Publications Found: 1230
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

An Assessment Of Corrections For Eddy Covariance Measured Turbulent Fluxes Over Snow In Mountain Environments
Reba, M. L., Link, T. E., Marks, D., Pomeroy, J.

Journal: Water Resources Research, Volume 45 (4): (2009). DOI: 10.1029/2008WR007045 Sites: US-Rwe

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

Response Of CO2 Exchange In A Tussock Tundra Ecosystem To Permafrost Thaw And Thermokarst Development
Vogel, J., Schuur, E. A. G., Trucco, C., Lee, H.

Climate change in high latitudes can lead to permafrost thaw, which in ice-rich soils can result in ground subsidence, or thermokarst. In interior Alaska, we examined seasonal and annual ecosystem CO2exchange using static and automatic chamber measurements in three areas of a moist acidic tundra ecosystem undergoing varying …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009). DOI: 10.1029/2008jg000901 Sites: US-EML

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

Random And Systematic CO2 Flux Sampling Errors For Tower Measurements Over Forests In The Convective Boundary Layer
Vickers, D., Thomas, C., Law, B. E.

The perturbation timescale-dependences of the CO2 flux and the random flux sampling error are evaluated from eddy-covariance tower observations in the mid-day convective boundary layer over mid-latitude conifer forests. The perturbation timescale is the timescale used in the standard Reynolds decomposition to …

Journal: Agricultural And Forest Meteorology, Volume 149 (1): 73-83 (2009). DOI: 10.1016/j.agrformet.2008.07.005 Sites: US-Me2, US-Me3

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

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

An Evaluation Of Calibration Techniques For In Situ Carbon Dioxide Measurements Using A Programmable Portable Trace-Gas Measuring System
Burns, S. P., Delany, A. C., Sun, J., Stephens, B. B., Oncley, S. P., Maclean, G. D., Semmer, S. R., Schröter, J., Ruppert, J.

The construction and deployment of a portable trace-gas measurement system (TGaMS) is described. The air-collection system (dubbed HYDRA) collects air samples from 18 different locations and was connected to either one or two LI-COR LI-7000 gas analyzers to measure CO2. An in situ “field calibration” method, that uses four calibration …

Journal: Journal Of Atmospheric And Oceanic Technology, Volume 26 (2): 291-316 (2009). DOI: 10.1175/2008JTECHA1080.1 Sites: US-NR1, US-NR2

Physiological Responses Of Red Mangroves To The Climate In The Florida Everglades
Barr, J. G., Fuentes, J. D., Engel, V., Zieman, J. C.

This manuscript reports the findings of physiological studies of red mangrove (Rhizophora mangle L.) conducted from June to August 2001 and from May to June 2003 in the Florida Everglades. In situ physiological measurements were made using environmentally controlled gas exchange systems. The field investigations were carried …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G02008): n/a-n/a (2009). DOI: 10.1029/2008JG000843 Sites: US-Skr