Onset Date of Forest Canopy Detected from MODIS Leaf Area Index
نویسندگان
چکیده
منابع مشابه
seasonal changes in canopy leaf area index and moDis vegetation products for a boreal forest site in central Finland
Seasonal change in leaf area index (LAI) is highly important in remote sensing of land surface phenology because LAI is a main driving factor of forest reflectance. We present a time series of in situ measurements of boreal forest LAI expanding throughout the growing period from budburst to senescence. We measured the LAI of 20 stands at approximately two-week intervals between mid-May and mid-...
متن کاملComparison of Different Ground Techniques to Map Leaf Area Index of Norway Spruce Forest Canopy
The leaf area index (LAI) of three monocultures of Norway spruce (Picea abies (L.) Karst), different in age and structure, was measured by means of two indirect optical techniques of LAI field mapping: 1/ plant canopy analyser LAI-2000, and 2/ digital hemispherical photographs (DHP). The supportive measurements with the TRAC instrument were conducted to produce mainly the element clumping index...
متن کاملMonitoring boreal forest leaf area index across a Siberian burn chronosequence: a MODIS validation study
X. CHEN*{, L. VIERLING{", D. DEERING{ and A. CONLEY§ {Institute of Atmospheric Sciences, South Dakota School of Mines and Technology, Rapid City, South Dakota, 57701, USA {NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA §SSAI, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA "Current address: College of Natural Resources, University of Idaho, Moscow, Idaho, 8384...
متن کاملCalibration and validation of hyperspectral indices for the estimation of broadleaved forest leaf chlorophyll content, leaf mass per area, leaf area index and leaf canopy biomass
Article history: This article aims at finding Received 12 October 2007 Received in revised form 6 June 2008 Accepted 6 June 2008
متن کاملExtracting forest canopy structure from spatial information of high resolution optical imagery: tree crown size versus leaf area index
Leaves are the primary interface where energy, water and carbon exchanges occur between the forest ecosystems and the atmosphere. Leaf area index (LAI) is a measure of the amount of leaf area in a stand, and the tree crown size characterizes how leaves are clumped in the canopy. Both LAI and tree crown size are of essential ecological and management value. There is a lot of interest in extracti...
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ژورنال
عنوان ژورنال: Journal of Ecology and Environment
سال: 2008
ISSN: 2287-8327
DOI: 10.5141/jefb.2008.31.2.153