Publications

Publications Found: 1437

Carbon Fluxes Across Regions: Observational Constraints At Multiple Scales
Law, B. E., Turner, D., Campbell, J., Lefsky, M., Guzy, M., Sun, O., Tuyl, S. V., Cohen, W.


Journal: Scaling And Uncertainty Analysis In Ecology, Volume : 167-190 (2006). DOI: 10.1007/1-4020-4663-4_9 Sites: US-Me2

The Contribution Of Beneath-Snow Soil Respiration To Total Ecosystem Respiration In A High-Elevation, Subalpine Forest
Monson, R. K., Burns, S. P., Williams, M. W., Delany, A. C., Weintraub, M., Lipson, D. A.

The respiratory loss of CO2 from soil microbes beneath winter snow in forests from cold climates can significantly influence the annual carbon budget. We explored the magnitude of winter soil respiration using continuous measurements of beneath‐snow CO2 concentration within the footprint of a flux tower in a subalpine forest in …


Journal: Global Biogeochemical Cycles, Volume 20 (3): n/a-n/a (2006). DOI: 10.1029/2005GB002684 Sites: US-NR1

Estimating The Uncertainty In Annual Net Ecosystem Carbon Exchange: Spatial Variation In Turbulent Fluxes And Sampling Errors In Eddy-Covariance Measurements
Oren, R., Hsieh, C., Stoy, P., Albertson, J., Mccarthy, H. R., Harrell, P., Katul, G. G.

Above forest canopies, eddy covariance (EC) measurements of mass (CO2, H2O vapor) and energy exchange, assumed to represent ecosystem fluxes, are commonly …


Journal: Global Change Biology, Volume 12 (5): 883-896 (2006). DOI: 10.1111/j.1365-2486.2006.01131.x Sites: US-Dk1, US-Dk2, US-Dk3

An Evaluation Of Models For Partitioning Eddy Covariance-Measured Net Ecosystem Exchange Into Photosynthesis And Respiration
Stoy, P. C., Katul, G. G., Siqueira, M. B., Juang, J., Novick, K. A., Uebelherr, J. M., Oren, R.

We measured net ecosystem CO2 exchange (NEE) using the eddy covariance (EC) technique for 4 years at adjoining old field (OF), planted pine (PP) and hardwood forest (HW) ecosystems in the Duke Forest, NC. To compute annual sums of NEE and its components – gross …


Journal: Agricultural And Forest Meteorology, Volume 141 (1): 2-18 (2006). DOI: 10.1016/j.agrformet.2006.09.001 Sites: US-Dk3

Influences Of Canopy Photosynthesis And Summer Rain Pulses On Root Dynamics And Soil Respiration In A Young Ponderosa Pine Forest
Misson, L., Gershenson, A., Tang, J., McKay, M., Cheng, W., Goldstein, A.
Our first objective was to link the seasonality of fine root dynamics with soil respiration in a ponderosa pine (Pinus ponderosa P. & C. Lawson) plantation located in the Sierra Nevada of California. The second objective was to examine how canopy photosynthesis influences fine root initiation, …


Journal: Tree Physiology, Volume 26 (7): 833-844 (2006). DOI: 10.1093/treephys/26.7.833 Sites: US-Blo

An Eddy Covariance Mesonet To Measure The Effect Of Forest Age On Land-Atmosphere Exchange
Goulden, M. L., Winston, G. C., McMillan, A. M., Litvak, M. E., Read, E. L., Rocha, A. V., Rob Elliot, J.

We deployed a mesonet of year-round eddy covariance towers in boreal forest stands that last burned in ∼1850, ∼1930, 1964, 1981, 1989, 1998, and 2003 to understand how CO2 exchange and evapotranspiration change during secondary succession. We used MODIS imagery to establish that the tower sites were representative …


Journal: Global Change Biology, Volume 12 (11): 2146-2162 (2006). DOI: 10.1111/j.1365-2486.2006.01251.x Sites: CA-NS1, CA-NS2, CA-NS3, CA-NS5, CA-NS6, CA-NS7

Model-Data Synthesis Of Diurnal And Seasonal CO2 Fluxes At Niwot Ridge, Colorado
Sacks, W. J., Schimel, D. S., Monson, R. K., Braswell, B. H.

Eddy covariance records hold great promise for understanding the processes controlling the net ecosystem exchange of CO2 (NEE). However, NEE is the small difference …


Journal: Global Change Biology, Volume 12 (2): 240-259 (2006). DOI: 10.1111/j.1365-2486.2005.01059.x Sites: US-NR1

Soil Properties Differently Influence Estimates Of Soil CO2 Efflux From Three Chamber-Based Measurement Systems
Butnor, J. R., Johnsen, K. H., Maier, C. A.

Soil CO2 efflux is a major component of net ecosystem productivity (NEP) of forest systems. Combining data from multiple researchers for larger-scale modeling and assessment will only be valid if their methodologies provide directly comparable …


Journal: Biogeochemistry, Volume 73 (1): 283-301 (2005). DOI: 10.1007/s10533-004-4022-1 Sites: US-Dk2, US-Dk3

Observations Of Total Alkyl Nitrates Within The Sacramento Urban Plume
Cleary, P. A., Murphy, J. G., Day, P. J. Wooldridge, D. A., Millet, D. B., McKay, M., Goldstein, A. H., Cohen, R. C.

During the summer of 2001, NO2, total peroxy nitrates (ΣPNs), total alkyl nitrates (ΣANs), HNO3, volatile organic compounds (VOC), CO2, O3, and meteorological variables were measured at Granite Bay, CA. The diurnal variation in ΣPNs, ΣANs and HNO3 were all strongly correlated …


Journal: Atmospheric Chemistry And Physics Discussions, Volume 5 (4): 4801-4843 (2005). DOI: 10.5194/acpd-5-4801-2005 Sites: US-Blo

Atmospheric Aerosol Light Scattering And Surface Wetness Influence The Diurnal Pattern Of Net Ecosystem Exchange In A Semi-Arid Ponderosa Pine Plantation
Misson, L., Lunden, M., McKay, M., Goldstein, A. H.

The diurnal variation of net ecosystem exchange (NEE) showed an unusual pattern at the Blodgett Forest Ameriflux site, with late afternoon NEE lower than early morning (indicating more uptake), while air temperature and atmospheric vapor pressure deficit were much higher. …


Journal: Agricultural And Forest Meteorology, Volume 129 (1-2): 69-83 (2005). DOI: 10.1016/j.agrformet.2004.11.008 Sites: US-Blo