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LBA-ECO CD-03 Cloud Base-Backscatter Data, km 67 Tower Site, Tapajos National Forest

Data Set Overview

Data setLBA-ECO CD-03 Cloud Base-Backscatter Data, km 67 Tower Site, Tapajos National Forest
DOIhttps://doi.org/10.3334/ORNLDAAC/942
Release date2009-09-29
ProjectLarge Scale Biosphere-Atmosphere Experiment (LBA-ECO)
Time period2001-04-07 to 2003-12-22

Usage Metrics

CountEarliest DateLatest DateData Usage
Downloads3172009-09-292017-03-171190 total files downloaded

Description

A Vaisala CT-25K ceilometer was installed at an old-growth forest site located at the km 67 Eddy Flux Tower site in the Tapajos National Forest, Para, Brazil, off Kilometer 67 of BR-163 south of Santarem in April 2001 and remained operational through December 2003, with reliable data being collected between May 2001 and June 2003. Annual, 2001 to 2003, 30-minute average cloud base and backscatter profile data and measurement statistics (sample count, variance, skewness, and kurtosis) are presented in 15 ASCII comma-delineated files. In addition, the cloud base values (m) and measurement statistics for the three reported cloud base levels have been consolidated in 3 annual comma-separated files. The ceilometer provides 15-second measurements of cloud base (three levels up to 7500 m), echo intensity, and a 30-m resolution backscatter profile. The ceilometer reports vertical visibility during periods when the sky is obscured but a cloud base is not detectable. The ceilometer was operational for a sufficient amount of time to examine wet-to-dry season variations in cloud cover fraction and cloud base height.

Data set documentation

Citation

Czikowsky, M.J. 2009. LBA-ECO CD-03 Cloud Base-Backscatter Data, km 67 Tower Site, Tapajos National Forest. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/942

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Data Files

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Data File (Granule)File SizeDates
CD03_Ceilometer_Sample_Count_2001.csv 9.6MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Kurtosis_2003.csv 12.7MB 2003-01-01 - 2003-12-22
CD03_Ceilometer_cloud_level_only_2003.csv 990.1KB 2003-01-01 - 2003-12-22
CD03_Ceilometer_cloud_level_only_2001.csv 1.0MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Kurtosis_2001.csv 13.2MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Kurtosis_2002.csv 17.7MB 2002-01-01 - 2002-12-31
CD03_Ceilometer_Skewness_2002.csv 17.4MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Variance_2003.csv 12.2MB 2003-01-01 - 2003-12-22
CD03_Ceilometer_Skewness_2001.csv 12.9MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Backscatter_2003.csv 12.7MB 2003-01-01 - 2003-12-22
CD03_Ceilometer_Backscatter_2001.csv 11.7MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_Backscatter_2002.csv 15.9MB 2002-01-01 - 2002-12-31
CD03_Ceilometer_Skewness_2003.csv 12.7MB 2003-01-01 - 2003-12-22
CD03_Ceilometer_Sample_Count_2003.csv 9.5MB 2003-01-01 - 2003-12-22
CD03_Ceilometer_Variance_2001.csv 11.5MB 2001-04-07 - 2001-12-31
CD03_Ceilometer_cloud_level_only_2002.csv 1.4MB 2002-01-01 - 2002-12-31
CD03_Ceilometer_Variance_2002.csv 15.6MB 2002-01-01 - 2002-12-31
CD03_Ceilometer_Sample_Count_2002.csv 13.0MB 2002-01-01 - 2002-12-31

Companion Files

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Data set has 2 companion files.

  • CD03_Ceilometer_Km67_Methods.pdf
  • CD03_Ceilometer_Km67.pdf