Publications

Publications Found: 1437

Effects Of Seasonal Drought On Net Carbon Dioxide Exchange From A Woody-Plant-Encroached Semiarid Grassland
Scott, R.L., Jenerette, G.D., Potts, D.L., Huxman, T.E.

Annual precipitation in the central and southern warm-desert region of North America is distributed climatologically between summer and winter periods with two prominent dry periods between them. We used energy and carbon dioxide (CO2) fluxes from eddy covariance along with standard meteorological and soil moisture measurements …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009). DOI: 10.1029/2008jg000900 Sites: US-SRM

Soil, Plant, And Transport Influences On Methane In A Subalpine Forest Under High Ultraviolet Irradiance
Bowling, D. R., Miller, J. B., Rhodes, M. E., Burns, S. P., Monson, R. K., Baer, D.

Recent studies have demonstrated direct methane emission from plant foliage under aerobic conditions, particularly under high ultraviolet (UV) irradiance. We examined the potential importance of this phenomenon in a high-elevation conifer forest using micrometeorological techniques. Vertical profiles of methane and carbon dioxide …


Journal: Biogeosciences, Volume 6 (7): 1311-1324 (2009). DOI: 10.5194/bg-6-1311-2009 Sites: US-NR1

Whole-Ecosystem Labile Carbon Production In A North Temperate Deciduous Forest
Gough, C. M., Flower, C. E., Vogel, C. S., Dragoni, D., Curtis, P. S.


Journal: Agricultural And Forest Meteorology, Volume 149 (9): 1531-1540 (2009). DOI: 10.1016/j.agrformet.2009.04.006 Sites: US-UMB

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

The Effect Of Permafrost Thaw On Old Carbon Release And Net Carbon Exchange From Tundra
Schuur, E. A., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., Osterkamp, T. E.

Permafrost soils in boreal and Arctic ecosystems store almost twice as much carbon1, 2 as is currently present in the atmosphere
Journal: Nature, Volume 459 (7246): 556-559 (2009). DOI: 10.1038/nature08031 Sites:
US-EML


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

Controls Over Ozone Deposition To A High Elevation Subalpine Forest
Turnipseed, A. A., Burns, S. P., Moore, D. J., Hu, J., Guenther, A. B., Monson, R. K.

Ecosystem level ozone (O3) fluxes during four different years were examined at a subalpine forest site in the Colorado Rocky Mountains. The local mountain–valley wind system and the proximity of the Denver Metropolitan area leads to high summertime ozone episodes on many afternoons. The timing between these episodes and the ecosystem …


Journal: Agricultural And Forest Meteorology, Volume 149 (9): 1447-1459 (2009). DOI: 10.1016/j.agrformet.2009.04.001 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

Satellite observations of decadal scale CO2 fluxes over black spruce forests in Alaska associated with climate variability.
Date, T., Ueyama. M., Harazono, Y., Ota, Y., Iwata, T. and Yamamoto, S.


Journal: J. Agric. Meteorol., Volume 65: 47-60 (2009). DOI: Sites: US-Uaf

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