Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-1131

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

ABSTRACT: 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.

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1131

Identified by : ND30_REE_WATER_CHEMISTRY

This dataset was released on January 01, 2012.

The time range for this dataset is May 17, 1999 to May 10, 2006.

The spatial range for this dataset is -2.75° to -2.75° latitude, and -55° to -55° longitude. map

DOI : 10.3334/ORNLDAAC/1131
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_1131 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_1131 (ornl lexicon)