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

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 and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated August 11, 2025, 16:12 (UTC)
Created March 20, 2025, 17:11 (UTC)
accessLevel public
bureauCode {026:00}
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harvest_source_id 44069cc8-d515-495f-9ea4-b67f76a0a7cb
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1131
landingPage https://doi.org/10.3334/ORNLDAAC/1131
modified 2025-08-08
programCode {026:000}
publisher ORNL_DAAC
references {https://daac.ornl.gov/graphics/browse/project/square/lba_logo_square.png}
resource-type Dataset
source_datajson_identifier true
source_hash d3ae6b84e1565470cf085daabc70d34618a017de3c563c94c6a0cea8ee9c3b85
source_schema_version 1.1
spatial [[{"WestBoundingCoordinate":-55.0,"NorthBoundingCoordinate":-2.75,"EastBoundingCoordinate":-55.0,"SouthBoundingCoordinate":-2.75}],"CARTESIAN"]
temporal 1999-05-17/1999-05-17
theme {"Earth Science"}