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LBA REGIONAL LAND COVER FROM AVHRR, 8-KM, 1984 (DEFRIES ET AL.)

Entry ID: lba_avhrr_8km

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Summary

Abstract: This data set is a subset of an 8-km global land cover product (DeFries et al. 1998). This subset was created for the study area of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) in South America (i.e., latitude 10° N to 25° S, longitude 30° to 85° W). The data are in ASCII GRID file format.To develop improved methodologies for global land cover classifications as well as to ... provide global land cover products for immediate use in global change research, researchers at the Laboratory for Global Remote Sensing Studies at the University of Maryland employed the NASA/NOAA Pathfinder AVHRR Land (PAL) data set with a spatial resolution of 8 km. The PAL data set has a length of record of 14 years (1981-1994), providing the ability to test the stability of classification algorithms. Furthermore, the data set includes red, infrared, and thermal bands in addition to the Normalized Difference Vegetation Index (NDVI). Inclusion of these additional bands improves discrimination between cover types. The project's aim was to develop and validate global land cover data sets and to develop advanced methodologies for more realistically describing the vegetative land surface based on satellite data.The global land cover product (Defries et al. 1998) was derived by testing several metrics that describe the temporal dynamics of vegetation over an annual cycle. These metrics were applied to 1984 PAL data at 8-km resolution to derive a global land cover classification product using a decision tree classifier. The final product contains 13 land cover classes. The original 8-km global land cover product is available for download from the University of Maryland's Global Land Cover Facility (GLCF) Web site (http://glcf.umiacs.umd.edu/data/landcover/index.shtml). Additional information and references on this data set can be found at the GLCF Web site, as well as at the LGRSS Web site (http://www.geog.umd.edu/LGRSS/intro.html). More information can be found at ftp://daac.ornl.gov/data/lba/land_use_land_cover_change/comp/land_c... was a cooperative international research initiative led by Brazil. NASA was a lead sponsor for several experiments. LBA was designed to create the new knowledge needed to understand the climatological, ecological, biogeochemical, and hydrological functioning of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system.

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Geographic Coverage

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Spatial coordinates

N: 10.0

S: -25.0

E: -30.0

W: -85.0

Data Set Citation

Dataset Originator/Creator: DEFRIES, R.S.HANSEN, M.SOHLBERG, R.TOWNSHEND, J.R.G.

Dataset Title: LBA REGIONAL LAND COVER FROM AVHRR, 8-KM, 1984 (DEFRIES ET AL.)

Dataset Release Date: 2003

Dataset Release Place: Oak Ridge, Tennessee, U.S.A.

Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center

Data Presentation Form: Online Files

Dataset DOI: doi:10.3334/ORNLDAAC/680

Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=680&term2attribut...

Temporal Coverage

Start Date: 1984-01-01

Stop Date: 1984-12-31

Location Keywords

CONTINENT > SOUTH AMERICA > AMAZONIA

Science Keywords

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > AGRICULTURAL LANDS

BIOSPHERE > VEGETATION > VEGETATION COVER

LAND SURFACE > LAND USE/LAND COVER > LAND COVER

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

OCEANS

Platform

DMSP > Defense Meteorological Satellite Program

DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11

Instrument

SMMR > Scanning Multichannel Microwave Radiometer

SSMI > Special Sensor Microwave/Imager

Ancillary Keywords

Arctic

DAAC

Data Center

National Snow and Ice Data Center

Data Center URL: http://nsidc.org
Dataset ID: NSIDC_ExtentAnomalyMaps2002-2008

Data Center Personnel
Name: NSIDC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA

Publications/References

Meier, W.N., J.C. Stroeve, and F. Fetterer. 2006. Whither Arctic sea ice? A clear signal of decline regionally, seasonally and extending beyond the satellite record. Annals of Glaciology 46: 428-434.

Cavalieri, D.J., C.L. Parkinson, and K.Y. Vinnikov. 2003. 30-year satellite record reveals contrasting Arctic and Antarctic decadal sea ice variability. Geophysical Research Letters doi:10.1029/2003GL018031.

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2009-07-09

Last DIF Revision Date: 2012-12-13

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