Publications

Publications Found: 18
Variation In Wood Density Determines Spatial Patterns Inamazonian Forest Biomass
Baker, T. R., Phillips, O. L., Malhi, Y., Almeida, S., Arroyo, L., Di Fiore, A., Erwin, T., Killeen, T. J., Laurance, S. G., Laurance, W. F., Lewis, S. L., Lloyd, J., Monteagudo, A., Neill, D. A., Patino, S., Pitman, N. C., M. Silva, J. N., Vasquez Martinez, R.

Uncertainty in biomass estimates is one of the greatest limitations to models of carbon flux in tropical forests. Previous comparisons of field-based estimates of the aboveground biomass (AGB) of trees greater than 10 cm diameter within Amazonia have been limited by the paucity of data for western Amazon forests, and the use of …


Journal: Global Change Biology, Volume 10 (5): 545-562 (2004), ISBN . DOI: 10.1111/j.1365-2486.2004.00751.x Sites: BR-Ma2, BR-Sa1, BR-Sa3

Carbon Balance And Vegetation Dynamics In An Old-Growth Amazonian Forest
Rice, A. H., Pyle, E. H., Saleska, S. R., Hutyra, L., Palace, M., Keller, M., de Camargo, P. B., Portilho, K., Marques, D. F., Wofsy, S. C.

Amazon forests could be globally significant sinks or sources for atmospheric carbon dioxide, but carbon balance of these forests remains poorly quantified. We surveyed 19.75 ha along four 1-km transects …


Journal: Ecological Applications, Volume 14 (sp4): 55-71 (2004), ISBN . DOI: 10.1890/02-6006 Sites: BR-Sa1

The Robustness Of Eddy Correlation Fluxes For Amazon Rain Forest Conditions
Kruijt, B., Elbers, J. A., von Randow, C., Araújo, A. C., Oliveira, P. J., Culf, A., Manzi, A. O., Nobre, A. D., Kabat, P., Moors, E. J.

We analyzed errors and uncertainties in time-integrated eddy correlation data for sites in the Amazon. A well-known source of potential error in eddy correlation is through possible advective losses of CO2emissions during calm nights. There are also questions related to the treatment of low frequencies, non-horizontal …


Journal: Ecological Applications, Volume 14 (sp4): 101-113 (2004), ISBN . DOI: 10.1890/02-6004 Sites: BR-Ma2, BR-Sa1, BR-Sa3

Effects Of Meteorological Variations On The CO2 Exchange Of A Brazilian Transitional Tropical Forest
Vourlitis, G. L., Priante Filho, N., Hayashi, M. M., Nogueira, J. d., Raiter, F., Hoegel, W., Campelo, Jr, J. H.

The net ecosystem CO2 exchange (NEE) of a 28–30 m tall transitional (ecotonal) tropical forest of the Brazilian Amazon was quantified using tower-based eddy covariance. Measurements were made …


Journal: Ecological Applications, Volume 14 (sp4): 89-100 (2004), ISBN . DOI: 10.1890/01-6005 Sites: BR-Sa1, BR-Sa3

Radon Fluxes In Tropical Forest Ecosystems Of Brazilian Amazonia: Night-Time CO2 Net Ecosystem Exchange Derived From Radon And Eddy Covariance Methods
Martens, C. S., Shay, T. J., Mendlovitz, H. P., Matross, D. M., Saleska, S. R., Wofsy, S. C., Woodward, W. S., Menton, M. C., De Moura, J. M., Crill, P. M., De Moraes, O. L., Lima, R. L.

Radon-222 (Rn-222) is used as a transport tracer of forest canopy–atmosphere CO2 exchange in an old-growth, tropical rain forest site near km 67 of the Tapajós National Forest, Pará, Brazil. Initial results, from month-long periods at the end of the wet season (June–July) and the end of the dry season (November–December) …


Journal: Global Change Biology, Volume 10 (5): 618-629 (2004), ISBN . DOI: 10.1111/j.1365-2486.2004.00764.x Sites: BR-Sa1

Seasonal And Depth Variation Of Soil Moisture In A Burned Open Savanna (Campo Sujo) In Central Brazil
Quesada, C. A., Miranda, A. C., Hodnett, M. G., Santos, A. J., Miranda, H. S., Breyer, L. M.

The soil water regimes of two areas of open savanna (campo sujo) near Brasilia, Brazil, were monitored between August 1999 and November 2000. Each area was subjected to a different fire regime. Soil water …


Journal: Ecological Applications, Volume 14 (sp4): 33-41 (2004), ISBN . DOI: 10.1890/01-6017 Sites: BR-Sa1

Remote Measurement Of Energy And Carbon Flux From Wildfires In Brazil
Riggan, P. J., Tissell, R. G., Lockwood, R. N., Brass, J. A., Pereira, J. A., Miranda, H. S., Miranda, A. C., Campos, T., Higgins, R.

Temperature, intensity, spread, and dimensions of fires burning in tropical savanna and slashed tropical forest in central Brazil were measured for the first time by remote sensing with an infrared imaging spectrometer that was designed to accommodate the high radiances of wildland fires. Furthermore, the first in situ airborne measurements …


Journal: Ecological Applications, Volume 14 (3): 855-872 (2004), ISBN . DOI: 10.1890/02-5162 Sites: BR-Sa1, BR-Sa3

Carbon In Amazon Forests: Unexpected Seasonal Fluxes And Disturbance-Induced Losses
Saleska, S. R., Miller, S. D., Matross, D. M., Goulden, M. L., Wofsy, S. C., Rocha, H. R. da, Camargo, P. B. de, Crill, P., Daube, B. C., Freitas, H. C. de, Hutyra, L., Keller, M., Kirchhoff, V., Menton, M., Munger, J. W., Pyle, E. H., Rice, A. H., Silva, H.

The net ecosystem exchange of carbon dioxide was measured by eddy covariance …


Journal: Science, Volume 302 (5650): 1554-1557 (2003), ISBN . DOI: 10.1126/science.1091165 Sites: BR-Sa1, BR-Sa3