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CATEGORIES:British Antarctic Survey
SUMMARY:Detecting and mapping vegetation distribution on t
 he Antarctic Peninsula from remote sensing data - 
 Peter Fretwell (BAS)
DTSTART;TZID=Europe/London:20081105T120000
DTEND;TZID=Europe/London:20081105T123000
UID:TALK13957AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/13957
DESCRIPTION:Vegetation on the Antarctic Peninsula is sparse\, 
 localized and consists mainly of the lower orders 
 of vegetation\, factors that have hindered previou
 s Remote Sensing (RS) studies. However\, the size 
 of the region\, and its remote and rugged nature m
 eans that RS methods are the only practical way to
  map distribution\, this has resulted in a lack of
  mapping and overall quantitative analysis of vege
 tation in the area. The region is important\, as i
 t has shown rapid signs of warming in the last few
  decades (~3.7°C since the 1950’s)\, and predictio
 ns indicate accelerated future warming. A baseline
  survey of the amount and distribution of vegetati
 on is required to monitor future change. We presen
 t a spectral reflectance methodology based on NDVI
  that can identify areas of both lichens and mosse
 s from Lansat ETM data. The NDVI analysis is check
 ed against vegetation surveys in Ryder Bay on the 
 AP. The results have been corrected for several fa
 ctors influencing low NDVI readings and analysis i
 n this environment. This methodology\, together wi
 th data acquired in compiling the Landsat Image Mo
 saic of Antarctica\, has been applied to 13 Landsa
 t scenes covering Graham Land in the Northern part
  of the AP to examine the distribution of vegetati
 on in the area. Initial results point to the need 
 for better understanding of Landsat scene correlat
 ion and geological anomalies at low NDVI readings.
  
LOCATION:British Antarctic Survey\, conference room
CONTACT:Sophie Fielding
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