Publications

Publications Found: 1378

The Controls On Net Ecosystem Productivity Along An Arctic Transect: A Model Comparison With Flux Measurements
Williams, M., Eugster, W., Rastetter, E. B., Mcfadden, J. P., Chapin, F. S.

Assessments of carbon (C) fluxes in the Arctic require detailed data on both how and why these fluxes vary across the landscape. Such assessments are complicated because tundra vegetation has diverse structure and function at both local and regional scales. To investigate this diversity, the Arctic Flux Study has used the eddy covariance …


Journal: Global Change Biology, Volume 6 (S1): 116-126 (2000), ISBN . DOI: 10.1046/j.1365-2486.2000.06016.x Sites: US-Upa

Kinetics Of Nitrogen Uptake By Populus Tremuloides In Relation To Atmospheric CO2 And Soil Nitrogen Availability
Rothstein, D. E., Zak, D. R., Pregitzer, K. S., Curtis, P. S.
Sustained increases in plant production in response to elevated atmospheric carbon dioxide (CO2) concentration may be constrained by the availability of soil nitrogen (N). However, it is possible that plants will respond to N limitation at elevated CO2 concentration by increasing the …


Journal: Tree Physiology, Volume 20 (4): 265-270 (2000), ISBN . DOI: 10.1093/treephys/20.4.265 Sites: US-UMB

Measurements Of Gross And Net Ecosystem Productivity And Water Vapour Exchange Of A Pinus Ponderosa Ecosystem, And An Evaluation Of Two Generalized Models
Law, B. E., Waring, R., Anthoni, P. M., Aber, J. D.

Net ecosystem productivity (NEP), net primary productivity (NPP), and water vapour exchange of a mature Pinus ponderosa forest (44°30′ N, 121°37′ W) growing …


Journal: Global Change Biology, Volume 6 (2): 155-168 (2000), ISBN . DOI: 10.1046/j.1365-2486.2000.00291.x Sites: US-Me4

Effects Of Forest Harvesting On Soil Methane Fluxes In Florida Slash Pine Plantations
Castro, M. S., Gholz, H. L., Clark, K. L., Steudler, P. A.

We examined the effects of forest harvesting on the net exchange of methane (CH4) between the atmosphere and sandy soils in two mature slash pine (Pinus elliottii Engelm. var. elliottii) plantations in northern Florida. Before each of the stem-only harvests, soils in these plantations were net sinks for CH4


Journal: Canadian Journal Of Forest Research, Volume 30 (10): 1534-1542 (2000), ISBN . DOI: 10.1139/cjfr-30-10-1534 Sites: US-SP1, US-SP2, US-SP3, US-SP4

Surface Heat Flux Estimation With Wind-Profiler/RASS And Radiosonde Observations
Jacobs, J. M., Coulter, R. L., Brutsaert, W.

A bulk ABL similarity approach was used to make regional estimates of the sensible heat flux by combining surface temperature measurements with mixed layer temperature and wind speed profiles. The mixed layer profiles were measured by a 915 MHz Profiler/Radio Acoustic Sounding …


Journal: Advances In Water Resources, Volume 23 (4): 339-348 (2000), ISBN . DOI: 10.1016/s0309-1708(99)00028-7 Sites: US-Wlr

Measurements Of CO2 And Energy Fluxes Over A Mixed Hardwood Forest In The Mid-Western United States
Schmid, H., Grimmond, C.S.B., Cropley, F., Offerle, B., Su, H.B.

Results from the first full year of measurements (1998–1999) of above canopy CO2 and energy fluxes at the AmeriFlux site in the Morgan-Monroe State Forest, IN, USA, are presented. The site is located in an extensive secondary successional broadleaf forest in the maple-beech to oak-hickory transition zone. The …


Journal: Agricultural And Forest Meteorology, Volume 103 (4): 357-374 (2000), ISBN . DOI: 10.1016/s0168-1923(00)00140-4 Sites: US-MMS

Long-Term Impacts Of Agriculture On Soil Carbon And Nitrogen In New England Forests
Compton, J. E., Boone, R. D.

Abandonment and reforestation of agricultural lands has been a major influence on the landscape of eastern North America. Cultivation and soil amendments can dramatically alter soil nutrient pools and cycling, yet few studies have examined the long-term (>50 yr) influence of pasturing and cultivation on soil processes in the forests …


Journal: Ecology, Volume 81 (8): 2314-2330 (2000), ISBN . DOI: 10.1890/0012-9658(2000)081[2314:ltioao]2.0.co;2 Sites: US-LPH

Estimating Watershed Evapotranspiration With Pass. Part I: Inferring Root-Zone Moisture Conditions Using Satellite Data
Song, J., Wesely, M. L., Coulter, R. L., Brandes, E. A.

A model framework for parameterized subgrid-scale surface fluxes (PASS) has been modified and applied as PASS1 to use satellite data, models, and limited surface observations to infer root-zone available moisture (RAM) content with high spatial resolution over large terrestrial areas. Data collected during the 1997 Cooperative Atmosphere–Surface …


Journal: Journal Of Hydrometeorology, Volume 1 (5): 447-461 (2000), ISBN . DOI: 10.1175/1525-7541(2000)001<0447:EWEWPP>2.0.CO;2 Sites: US-Wlr

Quantifying Simultaneous Fluxes Of Ozone, Carbon Dioxide And Water Vapor Above A Subalpine Forest Ecosystem
Zeller, K., Nikolov, N.

Assessing the long-term exchange of trace gases and energy between terrestrial ecosystems and the atmosphere is an important priority of the current climate change research. In this regard, it is particularly significant to provide valid data on simultaneous fluxes of carbon, …


Journal: Environmental Pollution, Volume 107 (1): 1-20 (2000), ISBN . DOI: 10.1016/s0269-7491(99)00156-6 Sites: US-GBT, US-GLE

Summer Differences Among Arctic Ecosystems In Regional Climate Forcing
Chapin, F. S., Eugster, W., McFadden, J. P., Lynch, A. H., Walker, D. A.

Biome differences in surface energy balance strongly affect climate. However, arctic vegetation is considered sufficiently uniform that only a single arctic land surface type is generally used in climate models. Field measurements in northern Alaska show large differences among arctic ecosystem types in summer energy absorption and …


Journal: Journal Of Climate, Volume 13 (12): 2002-2010 (2000), ISBN . DOI: 10.1175/1520-0442(2000)013<2002:SDAAEI>2.0.CO;2 Sites: US-Upa