Data Set Overview
|Data set||LBA-ECO CD-03 Cloud Base-Backscatter Data, km 67 Tower Site, Tapajos National Forest|
|Project||Large Scale Biosphere-Atmosphere|
|Time Period||2001-04-07 to 2003-12-22|
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.
See our Data Citations and Acknowledgements policy for more information.
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 .
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|Data File (Granule)||File Size||Dates|
|CD03_Ceilometer_Sample_Count_2001.csv||9.6 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Kurtosis_2003.csv||12.7 MB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_cloud_level_only_2003.csv||990.1 KB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_cloud_level_only_2001.csv||1.0 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Kurtosis_2001.csv||13.2 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Kurtosis_2002.csv||17.7 MB||2002-01-01 - 2002-12-31|
|CD03_Ceilometer_Skewness_2002.csv||17.4 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Variance_2003.csv||12.2 MB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_Skewness_2001.csv||12.9 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Backscatter_2003.csv||12.7 MB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_Backscatter_2001.csv||11.7 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_Backscatter_2002.csv||15.9 MB||2002-01-01 - 2002-12-31|
|CD03_Ceilometer_Skewness_2003.csv||12.7 MB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_Sample_Count_2003.csv||9.5 MB||2003-01-01 - 2003-12-22|
|CD03_Ceilometer_Variance_2001.csv||11.5 MB||2001-04-07 - 2001-12-31|
|CD03_Ceilometer_cloud_level_only_2002.csv||1.4 MB||2002-01-01 - 2002-12-31|
|CD03_Ceilometer_Variance_2002.csv||15.6 MB||2002-01-01 - 2002-12-31|
|CD03_Ceilometer_Sample_Count_2002.csv||13.0 MB||2002-01-01 - 2002-12-31|
Files related to this data set have been downloaded on 317 occasions since 2009-09-29, totaling 1190 files.