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SAFARI 2000 Leaf Area Measurements at the Mongu Tower Site, Zambia, 2000-2002

Data Set Overview

Data setSAFARI 2000 Leaf Area Measurements at the Mongu Tower Site, Zambia, 2000-2002
DOI10.3334/ORNLDAAC/781
Release date2005-03-08
ProjectSAFARI 2000 (S2K)
Time Period2000-10-09 to 2002-04-13

Description

Data from the LAI-2000 instrument were processed to determine the leaf area index (LAI) at the EOS Validation Core Site in Kataba Local Forest, approximately 20 km south of Mongu, Zambia. Measurements began in 2000 and continued into 2002, with measurements collected about every month throughout the growing season to examine the phenology of LAI for the site. The LAI-2000 measures the intensity of blue light in five upward-looking concentric conical rings. Measurements are made under the forest canopy and compared with open-sky measurements to determine transmittance for each of the five viewing angles. The sensor head was placed at ground level while the sensors measured light levels in conical scans. Effective leaf area was calculated from the transmittance in the different view angles based on the assumption of a random distribution of leaves (Welles and Norman, 1991).The LAI-2000 was carried along three parallel transects, each 750 m long and spaced 250 m apart. Each transect was divided into 25 m segments, and measurements were collected at the endpoints of each segment. Data from all transects were combined to provide site-average LAI for each sampling date. The length and spacing of the transects were chosen to sample an area large enough to be representative of a 1 km MODIS pixel. Ground observations of LAI from this study compared with MODIS LAI products were found to be in close agreement.The data are stored in an ASCII text file, in comma-separated-value (csv) format, with column headers.

Documentation

Data set reference document

Citation

Privette, J.L., M.M. Mukelabai, and K.F. Huemmrich. 2005. SAFARI 2000 Leaf Area Measurements at the Mongu Tower Site, Zambia, 2000-2002. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/781
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Project

SAFARI 2000 (S2K): The SAFARI 2000 project was an international science initiative to study the linkages between land and atmosphere processes in the southern African region. In addition, SAFARI 2000 examined the relationship of biogenic, pyrogenic, and anthropogenic emissions and the consequences of their deposition to the functioning of the biogeophysical and biogeochemical systems of southern Africa. This initiative, which was conducted in 1999-2001, was built around a number of ongoing, already-funded activities by NASA, the international community, and African nations in the southern African region.

Project data set list for SAFARI 2000 (S2K).

Companion Files

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  • mongu_lai-2000_readme.pdf

Data Files

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Data File (Granule)File SizeDates
mongu_lai-2000.csv 1.1 KB 2000-10-09 - 2002-04-13

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Files related to this data set have been downloaded on 114 occasions since 2007-12-10, totaling 217 files.