Publications

Publications Found: 1437

Monitoring Forest Carbon Sequestration With Remote Sensing And Carbon Cycle Modeling
Turner, D. P., Guzy, M., Lefsky, M. A., Ritts, W. D., Van Tuyl, S., Law, B. E.

Sources and sinks of carbon associated with forests depend strongly on the management regime and spatial patterns in potential productivity. Satellite remote sensing can provide spatially explicit information on land cover, stand-age class, and harvesting. …


Journal: Environmental Management, Volume 33 (4): 457-466 (2004). DOI: 10.1007/s00267-003-9103-8 Sites: US-Me4, US-Me5

Associations Between Carbon Isotope Ratios Of Ecosystem Respiration, Water Availability And Canopy Conductance
McDowell, N. G., Bowling, D. R., Schauer, A., Irvine, J., Bond, B. J., Law, B. E., Ehleringer, J. R.

We tested the hypothesis that the stable carbon isotope signature of ecosystem respiration (δ13CR) was regulated by canopy conductance (Gc) using weekly Keeling plots (n=51) from a semiarid old-growth ponderosa pine (Pinus ponderosa) forest in Oregon, USA. For …


Journal: Global Change Biology, Volume 10 (10): 1767-1784 (2004). DOI: 10.1111/j.1365-2486.2004.00837.x Sites: US-Blo, US-Me4

Diel And Seasonal Patterns Of Tropical Forest CO2 Exchange
Goulden, M. L., Miller, S. D., da Rocha, H. R., Menton, M. C., de Freitas, H. C., e Silva Figueira, A. M., de Sousa, C. A.

We used eddy covariance to measure the net exchange of CO2 between the atmosphere and an old-growth tropical forest in Pará, Brazil from 1 July 2000 to 1 July 2001. The mean air temperature and …


Journal: Ecological Applications, Volume 14 (sp4): 42-54 (2004). DOI: 10.1890/02-6008 Sites: BR-Sa3

How Plant Functional-Type, Weather, Seasonal Drought, And Soil Physical Properties Alter Water And Energy Fluxes Of An Oak–Grass Savanna And An Annual Grassland
Baldocchi, D. D., Xu, L., Kiang, N.

Savannas and open grasslands often co-exist in semi-arid regions. Questions that remain unanswered and are of interest to biometeorologists include: how do these contrasting landscapes affect the exchanges of energy on seasonal and annual time scales; and, do biophysical constraints imposed by water supply and water demand …


Journal: Agricultural And Forest Meteorology, Volume 123 (1-2): 13-39 (2004). DOI: 10.1016/j.agrformet.2003.11.006 Sites: US-Ton, US-Var

Disturbance And Climate Effects On Carbon Stocks And Fluxes Across Western Oregon USA
Law, B. E., Turner, D., Campbell, J., Sun, O. J., Van Tuyl, S., Ritts, W. D., Cohen, W. B.

We used a spatially nested hierarchy of field and remote-sensing observations and a process model, Biome-BGC, to produce a carbon budget for the forested region of Oregon, and to determine the relative influence of differences in climate and disturbance among the ecoregions on carbon stocks and fluxes. The simulations suggest that …


Journal: Global Change Biology, Volume 10 (9): 1429-1444 (2004). DOI: 10.1111/j.1365-2486.2004.00822.x Sites: US-Me2, US-Me4, US-Me5

Stem Wood Properties Of Populus Tremuloides, Betula Papyrifera And Acer Saccharum Saplings After 3 Years Of Treatments To Elevated Carbon Dioxide And Ozone
Kaakinen, S., Kostiainen, K., Ek, F., Saranpaa, P., Kubiske, M. E., Sober, J., Karnosky, D. F., Vapaavuori, E.

The aim of this study was to examine the effects of elevated carbon dioxide [CO2] and ozone [O3] and their interaction on wood chemistry and anatomy of …


Journal: Global Change Biology, Volume 10 (9): 1513-1525 (2004). DOI: 10.1111/j.1365-2486.2004.00814.x Sites: US-Los

Limitations To Carbon Mineralization In Litter And Mineral Soil Of Young And Old Ponderosa Pine Forests
Kelliher, F., Ross, D., Law, B., Baldocchi, D., Rodda, N.

Summer drought is a feature of the semi-arid region of central Oregon, USA, where vegetation naturally develops into ponderosa pine (Pinus ponderosa var. Laws) forest. Forest management consists of clearcut harvest and natural regeneration. Soil microbial activity is interconnected with forest processes because substrate …


Journal: Forest Ecology And Management, Volume 191 (1-3): 201-213 (2004). DOI: 10.1016/j.foreco.2003.12.005 Sites: US-Me4, US-Me5

Satellite-Based Modeling Of Gross Primary Production In An Evergreen Needleleaf Forest
Xiao, X., Hollinger, D., Aber, J., Goltz, M., Davidson, E. A., Zhang, Q., Moore, B.

The eddy covariance technique provides valuable information on net ecosystem exchange (NEE) of CO2, between the atmosphere and terrestrial ecosystems, ecosystem respiration, and gross primary production (GPP) at a variety of CO2 eddy flux tower sites. In this paper, we develop a new, satellite-based Vegetation …


Journal: Remote Sensing Of Environment, Volume 89 (4): 519-534 (2004). DOI: 10.1016/j.rse.2003.11.008 Sites: US-Ho1, US-Ho2, US-Ho3

Carbon Dioxide Exchange In A High Marsh On The Texas Gulf Coast: Effects Of Freshwater Availability
Heinsch, F.

The supply of water to the Nueces River Delta near Corpus Christi, Texas is limited by dams and channelization of the river which restrict freshwater inflow. The upper end (high marsh) of the delta frequently dries up during the summer. The marsh consists of slightly elevated islands containing emergent halophytes, and shallow ponds …


Journal: Agricultural And Forest Meteorology, Volume 125 (1-2): 159-172 (2004). DOI: 10.1016/j.agrformet.2004.02.007 Sites: US-FR1, US-FR2, US-FR3

Forest Thinning Experiment Confirms Ozone Deposition To Forest Canopy Is Dominated By Reaction With Biogenic VOCs
Goldstein, A. H., McKay, M., Kurpius, M. R., Schade, G. W., Lee, A., Holzinger, R., Rasmussen, R. A.

Ecosystem ozone uptake can occur through stomatal and surface deposition and through gas phase chemical reactions. In a California pine forest, thinning dramatically enhanced both monoterpene emission and ozone uptake. These simultaneous enhancements provide strong evidence that ozone reactions with unmeasured biogenically emitted …


Journal: Geophysical Research Letters, Volume 31 (22): n/a-n/a (2004). DOI: 10.1029/2004gl021259 Sites: US-Blo