Publication Search
Toomey, M., Friedl, M. A., Frolking, S., Hufkens, K., Klosterman, S., Sonnentag, O., Baldocchi, D. D., Bernacchi, C. J., Biraud, S. C., Bohrer, G., Brzostek, E., Burns, S. P., Coursolle, C., Hollinger, D. Y., Margolis, H. A., McCaughey, H., Monson, R. K., Munger, J. W., Pallardy, S., Phillips, R. P., Torn, M. S., Wharton, S., Zeri, M., Richardson, A. D.
The proliferation of digital cameras co‐located with eddy covariance instrumentation provides new opportunities to better understand the relationship between canopy phenology and the seasonality of canopy photosynthesis. In this paper we analyze the abilities and limitations of canopy color metrics measured by digital repeat photography …
Journal: Ecological Applications, Volume 25 (1): 99-115 (2015), ISBN . DOI: http://doi.org/10.1890/14-0005.1 Sites: US-ARM, US-Bar, US-Ha1, US-Ho1, US-MMS, US-MOz, US-NR1, US-UMB, US-UMd, US-Var, US-Wrc
Dennis Baldocchi, Cove Sturtevant
It is necessary to partition eddy covariance measurements of carbon dioxide exchange into its offsetting gross fluxes, canopy photosynthesis, and ecosystem respiration, to understand the biophysical controls on the net fluxes. And independent estimates of canopy photosynthesis (G) and ecosystem respiration (R) are needed to validate …
Journal: Agricultural and Forest Meteorology, Volume 207: 117-126 (2015), ISBN . DOI: 10.1016/j.agrformet.2015.03.010 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Let, CA-Mer, CA-NS1, CA-NS3, CA-NS5, CA-NS6, CA-NS7, CA-Oas, CA-Obs, CA-Ojp, CA-Qcu, CA-Qfo, CA-SJ2, CA-SJ3, CA-TP4, CA-WP1, US-ARM, US-Aud, US-Bo1, US-Ho1, US-Ho2, US-IB2, US-KS2, US-MMS, US-MOz, US-NC2, US-NR1, US-SO2, US-SO3, US-SO4, US-SP2, US-SP3, US-SRM, US-Ton, US-Tw3, US-UMB, US-Var, US-WBW, US-Wkg, US-Wrc
Wharton, S., Falk, M., Bible, K., Schroeder, M., Paw U, K.T.
The traditional hypothesis that old-growth forests are carbon neutral is under debate as recent studies
show evidence of net carbon sequestration. Here, we present a decade (1998–2008) of carbon dioxide,
water and energy fluxes from an old-growth stand in the American Pacific Northwest to identify
ecosystem-level responses to …
Journal: Agricultural and Forest Meteorology, Volume 161: 1-14 (2012), ISBN . DOI: 10.1016/j.agrformet.2012.03.007 Sites: US-WBW, US-Wrc
Wharton, S., Schroeder, M., Bible, K., Falk, M., Paw U, K.T.
This study examines how stand age affects ecosystem mass and energy exchange response to seasonal drought in three adjacent Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests. The sites include two early seral (ES) stands (0-15 years old) and an old-growth (OG) (~ 450-500 years old) forest in the Wind River Experiment Forest, …
Journal: Tree Physiology, Volume 29: 959-974 (2009), ISBN . DOI: 10.1093/treephys/tpp039 Sites: US-Wrc
Wharton, S., Chasmer, L., Falk, M., Paw U, K.T.
Variability in three Pacific teleconnection patterns are examined to see if net carbon exchange at a low-elevation, old-growth forest is affected by climatic changes associated with these periodicities. Examined are the Pacific Decadal Oscillation (PDO), Pacific/North American Oscillation (PNA) and El Niño-Southern Oscillation …
Journal: Global Change Biology, Volume 15: 2187-2205 (2009), ISBN . DOI: 10.1111/j.1365-2486.2009.01952.x Sites: US-Wrc
Wharton, S., Schroeder, M., Paw U, K.T., Falk, M., Bible, K.
Carbon dioxide, water vapor, and energy fluxes were measured using eddy covariance (EC) methodology over three adjacent evergreen forests in southern Washington State to identify stand-level age-effects on ecosystem exchange. The sites represent Douglas-fir forest ecosystems at two contrasting successional stages: old-growth (OG) …
Journal: Agricultural and Forest Meteorology, Volume 149: 1477-1490 (2009), ISBN . DOI: Sites: US-Wrc
Falk, M., Wharton, S., Schroeder, M., Ustin, S., U, K. T.
Journal: Tree Physiology, Volume 28 (4): 509-520 (2008), ISBN . DOI: 10.1093/treephys/28.4.509 Sites: US-Wrc
Falk, M., Paw U, K.T., Wharton, S., Schroeder, M.
Carbon dioxide (CO2) exchange was measured above the forest floor of a temperate Douglas-fir (Pseudotsuga menziesii (Mirbel)
Franco) and Western Hemlock (Tsuga heterophylla (Raf.) Sarg.) old-growth forest in southern Washington State. Continuous flux
measurements were conducted from July 1998 to December 2003 using the eddy-covariance …
Journal: Agricultural and Forest Meteorology, Volume 135: 269-283 (2005), ISBN . DOI: Sites: US-Wrc
Shaw, D., Franklin, J., Bible, K., Klopatek, J., Freeman, E., Greene, S., Parker, G.
The Wind River old-growth forest, in the southern Cascade Range of Washington State, is a cool (average annual temperature, 8.7°C), moist (average annual precipitation, 2223 mm), 500-year-old Douglas-fir–western hemlock forest of moderate to low productivity at 371-m elevation on a less than 10% slope. There is a seasonal snowpack …
Journal: Ecosystems, Volume 7 (5): 427-439 (2004), ISBN . DOI: 10.1007/s10021-004-0135-6 Sites: US-Wrc
Harmon, M.E., Bible, K., Ryan, M.G., Shaw, D.C., Chen, H., Klopatek, J., Li, X.
Ground-based measurements of stores, growth, mortality, litterfall, respiration, and decomposition were conducted in an old-growth forest at Wind River Experimental Forest, Washington, USA. These measurements were used to estimate gross primary production (GPP) and net primary production (NPP); autotrophic respiration (Ra) …
Journal: Ecosystems, Volume 7: 498-512 (2004), ISBN . DOI: 10.1007/s10021-004-0140-9 Sites: US-Wrc