Publications

Publications Found: 1437

Moisture Sensitivity Of Ecosystem Respiration: Comparison Of 14 Forest Ecosystems In The Upper Great Lakes Region, USA
Noormets, A., Desai, A., Cook, B., Euskirchen, E., Ricciuto, D., Davis, K., Bolstad, P., Schmid, H., Vogel, C., Carey, E., Su, H., Chen, J.

Ecosystem respiration (ER) was measured with the eddy covariance technique in 14 forest ecosystems in the Upper Great Lakes Region during the growing seasons of 2002 and 2003. The response of ER to soil temperature and moisture was analyzed using empirical models. On average, …


Journal: Agricultural And Forest Meteorology, Volume 148 (2): 216-230 (2008). DOI: 10.1016/j.agrformet.2007.08.002 Sites: US-Wi0, US-Wi1, US-Wi2, US-Wi3, US-Wi4, US-Wi6, US-Wi8

Temporal Changes In C And N Stocks Of Restored Prairie: Implications For C Sequestration Strategies
Matamala, R., Jastrow, J. D., Miller, R. M., Garten, C. T.

The recovery of ecosystem C and N dynamics after disturbance can be a slow process. Chronosequence approaches offer unique opportunities to use space-for-time substitution to quantify the recovery of ecosystem …


Journal: Ecological Applications, Volume 18 (6): 1470-1488 (2008). DOI: 10.1890/07-1609.1 Sites: US-IB1, US-IB2

Estimating Components Of Forest Evapotranspiration: A Footprint Approach For Scaling Sap Flux Measurements
Oishi, A. C., Oren, R., Stoy, P. C.

Forest evapotranspiration (ET) estimates that include scaled sap flux measurements often underestimate eddy covariance (EC)-measured latent heat flux (LE). We investigated potential causes for this bias using 4 years of coupled sap flux and LE measurements from a mature oak-hickory forest in North Carolina, USA. We focused on accuracy …


Journal: Agricultural And Forest Meteorology, Volume 148 (11): 1719-1732 (2008). DOI: 10.1016/j.agrformet.2008.06.013 Sites: US-Dk2

Long-Term Impact Of A Stand-Replacing Fire On Ecosystem CO2 Exchange Of A Ponderosa Pine Forest
Dore, S., Kolb, T. E., Montes-Helu, M., Sullivan, B. W., Winslow, W. D., Hart, S. C., Kaye, J. P., Koch, G. W., Hungate, B. A.

Ponderosa pine (Pinus ponderosa) forests of the southwestern United States are a mosaic of stands where undisturbed forests are carbon sinks, and stands recovering from wildfires may be sources of carbon to the atmosphere for decades after the fire. However, the relative magnitude of these sinks and sources has never been …


Journal: Global Change Biology, Volume 14 (8): 1801-1820 (2008). DOI: 10.1111/j.1365-2486.2008.01613.x Sites: US-Fuf, US-Fwf

The 2007 Eastern Us Spring Freeze: Increased Cold Damage In A Warming World?
Gu, L., Hanson, P. J., Post, W. M., Kaiser, D. P., Yang, B., Nemani, R., Pallardy, S. G., Meyers, T.


Journal: Bioscience, Volume 58 (3): 253-262 (2008). DOI: 10.1641/B580311 Sites: US-MOz, US-WBW

Estimating Basal Area And Stem Volume For Individual Trees From Lidar Data
Chen, Q., Gong, P., Baldocchi, D., Tian, Y. Q.

This study proposes a new metric called canopy geometric volume G, which is derived from small-footprint lidar data, for estimating individual-tree basal area and stem volume. Based on the plant allometry relationship, we found that basal area B is exponentially related to G (B = β1G3/4, where β1


Journal: Photogrammetric Engineering & Remote Sensing, Volume 73 (12): 1355-1365 (2007). DOI: 10.14358/pers.73.12.1355 Sites: US-Ton

CO2 Balance Of Boreal, Temperate, And Tropical Forests Derived From A Global Database
Luyssaert, S., Inglima, I., Jung, M., Richardson, A. D., Reichstein, M., Papale, D., Piao, S. L., Schulze, E., Wingate, L., Matteucci, G., Aragao, L., Aubinet, M., Beer, C., Bernhofer, C., Black, K. G., Bonal, D., Bonnefond, J., Chambers, J., Ciais, P., Cook, B., Davis, K. J., Dolman, A. J., Gielen, B., Goulden, M., Grace, J., Granier, A., Grelle, A., Griffis, T., Grxfcnwald, T., Guidolotti, G., Hanson, P. J., Harding, R., Hollinger, D. Y., Hutyra, L. R., Kolari, P., Kruijt, B., Kutsch, W., Lagergren, F., Laurila, T., Law, B. E., Le Maire, G., Lindroth, A., Loustau, D., Malhi, Y., Mateus, J., Migliavacca, M., Misson, L., Montagnani, L., Moncrieff, J., Moors, E., Munger, J. W., Nikinmaa, E., Ollinger, S. V., Pita, G., Rebmann, C., Roupsard, O., Saigusa, N., Sanz, M. J., Seufert, G., Sierra, C., Smith, M., Tang, J., Valentini, R., Vesala, T., Janssens, I. A.

Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties …


Journal: Global Change Biology, Volume 13 (12): 2509-2537 (2007). DOI: 10.1111/j.1365-2486.2007.01439.x Sites: BR-Ma2

Partitioning Net Ecosystem Exchange Of Co2: A Comparison Of A Bayesian/Isotope Approach To Environmental Regression Methods
Zobitz, J. M., Burns, S. P., Ogée, J., Reichstein, M., Bowling, D. R.

Separation of the net ecosystem exchange of CO2 (F) into its component fluxes of net photosynthesis (FA) and nonfoliar respiration (FR) is important in understanding the physical and environmental controls on these fluxes, and how these fluxes may respond to environmental change. In this paper, we evaluate a partitioning method based …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 112 (G3): n/a-n/a (2007). DOI: 10.1029/2006JG000282 Sites: US-NR1

What Limits Evaporation From Mediterranean Oak Woodlands – The Supply Of Moisture In The Soil, Physiological Control By Plants Or The Demand By The Atmosphere?
Baldocchi, D. D., Xu, L.

The prediction of evaporation from Mediterranean woodland ecosystems is complicated by an array of climate, soil and plant factors. To provide a mechanistic and process-oriented understanding, we evaluate theoretical and experimental information on water loss of Mediterranean oaks at three scales, the leaf, tree and woodland. …


Journal: Advances In Water Resources, Volume 30 (10): 2113-2122 (2007). DOI: 10.1016/j.advwatres.2006.06.013 Sites: US-Ton

Separating The Effects Of Albedo From Eco-Physiological Changes On Surface Temperature Along A Successional Chronosequence In The Southeastern United States
Juang, J.-Y., Katul, G.G., Siqueira, M.B.S., Stoy, P.C., Novick, K.A.

In the southeastern United States (SE), the conversion of abandoned agricultural land to forests is the dominant feature of land-cover change. However, few attempts have been made to quantify the impact of such conversion on surface temperature. Here, this issue is explored experimentally and analytically in three adjacent ecosystems …


Journal: Geophysical Research Letters, Volume 34 (21): n/a-n/a (2007). DOI: 10.1029/2007gl031296 Sites: US-Dk3