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LEAF AREA INDEX MAPS AT 30-M RESOLUTION, VALERI SITE, LAROSE, CANADA

Entry ID: LAI_MAPS_30M_VALERISITE

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Summary

Abstract: This data set provide local LAI maps for the Larose (Ontario) site in Canada. These derived maps may also be useful for validating other LAI maps over this same site given that the area is protected from disturbance. The maps should be used for the given period of validity. The LAI data are suitable for use in modeling the carbon, water, energy, energy and trace gas exchange between the land ... surface and the atmosphere at regional scales. The dataset may also be useful for monitoring changes in the land surface. A complete description of producing the maps for the Larose site and the ground measurement campaign is provide in the companion document (Larose2003FTReport.pdf (link)).The Leaf Area Index (LAI) maps are at 30-m resolution for the 3x3-km Larose site. LAI is defined here as half the total (all-sided) live foliage area per unit horizontal projected ground surface area. Overstory LAI corresponds to all tree foliage except for treeless areas where it corresponds to total foliage. The algorithms were developed from ground measurements and Landsat TM and ETM+ images (Fernandes et. al., 2003). A mask was developed using the Landsat ETM+/TM5 image and available land cover maps to identify only those areas with land cover belonging to the sample land cover classes and with Landsat ETM+/TM5 spectral reflectance values that fell within the convex hull of the spectral reflectance values over the plots. LAI was mapped within the masked region using the Landsat ETM+/TM5 image and the developed transfer function. The final LAI map was scaled by a factor of 20 (offset 0). The LAI maps are in Tagged Image File Format (TIFF).The VALERI project (Validation of Land European Remote sensing Instruments) is dedicated to the validation of the products derived from medium resolution satellite sensors ( http://www.avignon.inra.fr/valeri/ ). The objectives of the VALERI project are: (1) to evaluate the absolute accuracy of the biophysical products (LAI, fAPAR, fCover) derived from large swath sensors (e.g., AVHRR, POLDER, VEGETATION, SEAWIFS, MSG, MERIS, AATSR, MODIS, MISR, GLI) using a range of possible algorithms; and (2) to inter-compare the products derived from different sensors and algorithms. For this purpose, the VALERI project has developed a network of sites distributed over the Earth's surface and a methodology designed to directly measure the biophysical variables of interest at proper spatial and temporal scales.

Related URL

Link: GET DATA

Geographic Coverage

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Spatial coordinates

N: 45.39

S: 45.37

E: -75.2

W: -75.24

Data Set Citation

Dataset Originator/Creator: ABDUELGASIM, A.BUTSON, C.FERNANDES, R.A.KHURSHID, S.K.SYLVAIN., L.

Dataset Title: LEAF AREA INDEX MAPS AT 30-M RESOLUTION, VALERI SITE, LAROSE, CANADA

Dataset Release Date: 2006

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/829

Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=829&term2attribut...

Temporal Coverage

Start Date: 2003-05-08

Stop Date: 2003-08-19

Location Keywords

CONTINENT > NORTH AMERICA > CANADA > ONTARIO

Science Keywords

BIOSPHERE > VEGETATION > CANOPY CHARACTERISTICS

LAND SURFACE > LAND USE/LAND COVER > LAND COVER

LAND SURFACE > SURFACE RADIATIVE PROPERTIES > REFLECTANCE

ISO Topic Category

GEOSCIENTIFIC INFORMATION

Project

EOSDIS > Earth Observing System Data Information System

ESIP > Earth Science Information Partners Program

NDH > Natural Disaster Hotspots

Quality National Geophysical Data Center (NGDC) provides a database of nearly 4,000 volcanic events categorized from 2 to 8 according to VEI from 79 through 2000 nominally georeferenced to the nearest tenth or hundredth of a degree. Global Volcano Hazard and Frequency was based upon the frequency of volcanic events, irregardless of severity, within a 2.5 minute grid cell. The frequency range was classified into 10 classes of an approximately equal number of grid cells, whereby a higher value denotes a greater risk as posed by volcanic activity. Note that areas of no data are not necessarily without hazard risk but may be an artifact of a mask that excluded from analysis those areas where the population density was less than 5 persons per square kilometer and were without significant agriculture.

Access Constraints None

Use Constraints The Trustees of Columbia University in the City of New York and Center for
Hazards and Risk Research (CHRR) hold the copyright of this dataset. Users are
...

Ancillary Keywords

CIESIN > Environmental Protection > Disasters > Volcanic Eruptions

CIESIN > Environmental Protection > Disasters > Disaster Area

Data Set Progress

COMPLETE

Originating Center

SEDAC

Data Center

Socioeconomic Data and Applications Center

Data Center URL: http://sedac.ciesin.columbia.edu/
Dataset ID: CIESIN_CHRR_NDH_VOLCANO_HFD

Data Center Personnel
Name: SEDAC USER SERVICES Phone: +1 845-365-8920 Fax: +1 845-365-8922 Email: ciesin.info at ciesin.columbia.edu Contact Address: 61 Route 9W, P.O. Box 1000 City: Palisades Province or State: NY Postal Code: 10964 Country: USA

World Data Center for Human Interactions in the Environment

Data Center URL: http://sedac.ciesin.columbia.edu/wdc/
Dataset ID: CIESIN_CHRR_NDH_VOLCANO_HFD

Data Center Personnel
Name: ROBERT CHEN Phone: 1-845-365-8952 Fax: 1-845-365-8922 Email: bchen at ciesin.columbia.edu Contact Address: WDC for Human Interactions in the Environment CIESIN/Columbia University P. O. Box 1000 61 Route 9W City: Palisades Province or State: NY Postal Code: 10964 Country: USA

Distribution

Distribution Media: Online FTP

Distribution Format: ASCII

Fees: 0

Personnel

SEDAC USER SERVICES

Role: TECHNICAL CONTACT

Phone: +1 845-365-8920

Fax: +1 845-365-8922

Email: ciesin.info at ciesin.columbia.edu

Contact Address:

61 Route 9W, P.O. Box 1000

City: Palisades

Province or State: NY

Postal Code: 10964

Country: USA

SEDAC USER SERVICES

Role: DIF AUTHOR

Phone: +1 845-365-8920

Fax: +1 845-365-8922

Email: ciesin.info at ciesin.columbia.edu

Contact Address:

61 Route 9W, P.O. Box 1000

City: Palisades

Province or State: NY

Postal Code: 10964

Country: USA

Publications/References

Center for Hazards and Risk Research (CHRR)/Columbia University, Center for International Earth Science Information Network

(CIESIN)/Columbia University, and International Bank for Reconstruction and Development/The World Bank (2005), Global Volcano Mortality Risks and Distribution, Center for Hazards and Risk Research (CHRR)/Columbia University, Palisades, NY, http://sedac.ciesin.columbia.edu/data/set/ndh-volcano-mortality-ris...

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2005-03-30

Last DIF Revision Date: 2013-02-14

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