Publications

Publications Found: 1437

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). DOI: 10.1175/1520-0442(2000)013<2002:SDAAEI>2.0.CO;2 Sites: US-Upa

Effect Of Daily Minimum Temperature On Photosynthesis In Eastern Hemlock (Tsuga Canadensis L.) In Autumn And Winter
Hadley, J. L.


Journal: Arctic, Antarctic, And Alpine Research, Volume 32 (4): 368-374 (2000). DOI: 10.2307/1552384 Sites: US-Ha2

Factors Controlling Evaporation And Energy Partitioning Beneath A Deciduous Forest Over An Annual Cycle
Wilson, K. B., Hanson, P. J., Baldocchi, D. D.

The energy balance components were measured above the ground surface of a temperate deciduous forest over an annual cycle using the eddy covariance technique. Over a year, the net radiation at the forest floor was 21.5% of that above the canopy, but this proportion was not constant, primarily because of the distinct phenological …


Journal: Agricultural And Forest Meteorology, Volume 102 (2-3): 83-103 (2000). DOI: 10.1016/s0168-1923(00)00124-6 Sites: US-WBW

Nocturnal Mixing In A Forest Subcanopy
Mahrt, L., Lee, X., Black, A., Neumann, H., Staebler, R.

The vertical structure of the flow in the old aspen canopy in BOREAS is examined in terms of thermocouple profiles and sonic anemometers above, within, and below the aspen canopy. The data are composited for different periods in order to isolate seasonal changes of the canopy and sun angle. On clear nights, a strong surface …


Journal: Agricultural And Forest Meteorology, Volume 101 (1): 67-78 (2000). DOI: 10.1016/s0168-1923(99)00161-6 Sites: CA-Oas

Estimating CO2 Flux From Snowpacks At Three Sites In The Rocky Mountains
McDowell, N. G., Marshall, J. D., Hooker, T. D., Musselman, R.
Soil surface CO2 flux (Fs) is the dominant respiratory flux in many temperate forest ecosystems. Snowpacks increase this dominance by insulating the soil against the low temperature to which aboveground components are exposed. However, measurement of Fs


Journal: Tree Physiology, Volume 20 (11): 745-753 (2000). DOI: 10.1093/treephys/20.11.745 Sites: US-GLE

Wintertime Ozone Fluxes And Profiles Above A Subalpine Spruce–Fir Forest
Zeller, K.

High rural concentrations of ozone (O3) are thought to be stratospheric in origin, advected from upwind urban sources, or photochemically generated locally by natural trace gas emissions. Ozone is known to be transported vertically downward from the above-canopy atmospheric surface layer and destroyed within stomata or …


Journal: Journal Of Applied Meteorology, Volume 39 (1): 92-101 (2000). DOI: 10.1175/1520-0450(2000)039<0092:WOFAPA>2.0.CO;2 Sites: US-GBT

Land–Atmosphere Interaction Research, Early Results, And Opportunities In The Walnut River Watershed In Southeast Kansas: CASES And ABLE
LeMone, M. A., Grossman, R. L., Coulter, R. L., Wesley, M. L., Klazura, G. E., Poulos, G. S., Blumen, W., Lundquist, J. K., Cuenca, R. H., Kelly, S. F., Brandes, E. A., Oncley, S. P., McMillen, R. T., Hicks, B. B.

This paper describes the development of the Cooperative Atmosphere Surface Exchange Study (CASES), its synergism with the development of the Atmosphere Boundary Layer Experiments (ABLE) and related efforts, CASES field programs, some early results, and future plans and opportunities. CASES is a grassroots multidisciplinary effort …


Journal: Bulletin Of The American Meteorological Society, Volume 81 (4): 757-779 (2000). DOI: 10.1175/1520-0477(2000)081<0757:LIRERA>2.3.CO;2 Sites: US-Wlr

Modelling Assimilation And Intercellular CO2 From Measured Conductance: A Synthesis Of Approaches
Katul, G. G., Ellsworth, D. S., Lai, C.

A spectrum of models that estimate assimilation rate A from intercellular carbon dioxide concentration (Ci) and measured stomatal conductance to CO2 (gc) were investigated using leaf-level gas exchange measurements. The gas exchange measurements were performed in a uniform loblolly …


Journal: Plant, Cell And Environment, Volume 23 (12): 1313-1328 (2000). DOI: 10.1046/j.1365-3040.2000.00641.x Sites: US-Dk3

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). DOI: 10.1046/j.1365-2486.2000.00291.x Sites: US-Me4

Leaf Senescence Of Quercus Myrtifolia As Affected By Long-Term CO2 Enrichment In Its Native Environment
Li, J., Dijkstra, P., Hymus, G. J., Wheeler, R. M., Piastuch, W. C., Hinkle, C. R., Drake, B. G.

The long-term effects of elevated (ambient plus 350 μmol mol−1) atmospheric CO2 concentration (Ca) on the leaf senescence of Quercus …


Journal: Global Change Biology, Volume 6 (7): 727-733 (2000). DOI: 10.1046/j.1365-2486.2000.00347.x Sites: US-KS2