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SUMMARY:Detecting and mapping vegetation distribution on the Antarctic Pen
 insula from remote sensing data - Peter Fretwell (BAS)
DTSTART:20081105T120000Z
DTEND:20081105T123000Z
UID:TALK13957@talks.cam.ac.uk
CONTACT:Sophie Fielding
DESCRIPTION:Vegetation on the Antarctic Peninsula is sparse\, localized an
 d consists mainly of the lower orders of vegetation\, factors that have hi
 ndered previous Remote Sensing (RS) studies. However\, the size of the reg
 ion\, and its remote and rugged nature means that RS methods are the only 
 practical way to map distribution\, this has resulted in a lack of mapping
  and overall quantitative analysis of vegetation in the area. The region i
 s important\, as it has shown rapid signs of warming in the last few decad
 es (~3.7°C since the 1950’s)\, and predictions indicate accelerated fut
 ure warming. A baseline survey of the amount and distribution of vegetatio
 n is required to monitor future change. We present a spectral reflectance 
 methodology based on NDVI that can identify areas of both lichens and moss
 es from Lansat ETM data. The NDVI analysis is checked against vegetation s
 urveys in Ryder Bay on the AP. The results have been corrected for several
  factors influencing low NDVI readings and analysis in this environment. T
 his methodology\, together with data acquired in compiling the Landsat Ima
 ge Mosaic of Antarctica\, has been applied to 13 Landsat scenes covering G
 raham Land in the Northern part of the AP to examine the distribution of v
 egetation in the area. Initial results point to the need for better unders
 tanding of Landsat scene correlation and geological anomalies at low NDVI 
 readings. 
LOCATION:British Antarctic Survey\, conference room
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