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LBA-ECO ND-30 Water Chemistry, Rainfall Exclusion, km 67, Tapajos National Forest

Data Set Overview

Data setLBA-ECO ND-30 Water Chemistry, Rainfall Exclusion, km 67, Tapajos National Forest
Release date2012-10-30
ProjectLarge Scale Biosphere-Atmosphere
Time Period1999-05-17 to 2006-05-10


This data set reports the results of chemical analyses of rainfall, throughfall, litter leachate, and soil water samples collected before, during, and after a rainfall exclusion experiment conducted at the km 67 Seca Floresta site, Tapajos National Forest, Brazil. Samples were collected every two weeks from May 17, 1999 through May 10, 2006. Measurements included alkalinity, conductivity, pH, and selected anions and cations analyzed by ion chromatography. The exclusion treatment, began in late January 2000 and continued through December 2004, involved diverting about 60% of throughfall (equivalent to approximately half the rainfall) from a 1-hectare plot using plastic panels installed in the understory. The comparable 1-hectare control plot was unaltered. The purpose was to observe the potential effects of severe water stress on a humid Amazonian forest (Nepstad et al., 2002 and Nepstad et al., 2007). There are five comma-delimited data files with this data set.


Data set reference document


Nepstad, D.C., E.A. Davidson, D. Markewitz, E.J.M. Carvalho, J.Q. Chambers, D.G. Ray, J.B. Guerrero, P.A. Lefebvre, L. Sternberg, M. Moreira, L. Barros, F.Y. Ishida, I. Tohlver, E.L. Belk, K. Kalif, and K. Schwalbe. 2012. LBA-ECO ND-30 Water Chemistry, Rainfall Exclusion, km 67, Tapajos National Forest. ORNL DAAC, Oak Ridge, Tennessee, USA.
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Large Scale Biosphere-Atmosphere : The Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is an intensive scientific investigation of the tropical rainforest of Brazil and portions of adjacent countries. Like FIFE and BOREAS, this project uses intensive remote-sensing techniques and ground-based experiments to investigate the atmosphere-biosphere-hydrosphere dynamics of this large tropical region. The LBA Project encompasses several scientific disciplines, or components. The LBA-ECO component focuses on the question: "How do tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in Amazonia?"

Project data set list for Large Scale Biosphere-Atmosphere .

Companion Files

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  • ND30_REE_Water_Chemistry.pdf

Data Files

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Data File (Granule)File SizeDates
Rainfall.csv 44.3 KB 1999-05-17 - 2006-05-10
Litter_leachate.csv 176.6 KB 1999-05-17 - 2006-05-10
Lysimeter.csv 186.9 KB 1999-05-17 - 2006-05-10
Throughfall.csv 390.1 KB 1999-05-17 - 2006-05-10

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Files related to this data set have been downloaded on 33 occasions since 2012-10-09, totaling 130 files.