Station location: Toolik Lake LTER
     
Variables:

Climate by Month:  Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec
Mean Precip(mm)     32   22   24   20   22   42   50   60   38   26   26   32 
Mean Temp( C)      -29  -28  -23  -13    0    8    9    6    0  -12  -23  -28 
Temp Range( C)     9.1 10.0 11.6 11.1  9.1  9.4 10.0  9.1  7.9  7.1  8.0  8.9 

Elevation (m)        761 
Slope (%)            2 
Aspect (deg)         32 
Hydro Region         East Arctic (western 1/2)
Soils                Dune Lands
Permafrost           Mountainous area underlain by continuous permafrost
Vegetation           Moist herbaceous/Shrub tundra
Onset Greenness      Early May (1-15th)
Peak Greenness       Late June (16-30th)
Duration Greenness   Longer that 151 days (11 periods)
Max Greenness        NDVI = 0.48
Mean Greenness       NDVI = 0.31

Date:        07May 22May 07Jun 22Jun 07Jul 22Jul 07Aug 22Aug 07Sep 22Sep 07Oct 
NDVI Values    107   112   132   142   148   145   126   136   132   125   121 
     
AVHRR CIR*           Green Vis** = 132   Red Vis = 109   IR = 120 
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 * From 1991 data
** estimated