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We have extracted AARs for various watersheds, using lower and upper limits of ELAs, RGI v 3.0 glacier inventory, and the SRTM DEM. First, we have selected the lower limit of the ELA in a watershed and estimated the glacier area above it, using RGI and DEM data, and then divided it by the inventory-based total glacierized area of the same watershed. This computation has resulted in defining the upper limit of AAR. Similarly, we have used the upper limit of the ELA to estimate the lower limit of the AAR. Table 7 gives the list of AAR values within the individual watersheds.

Table 7

Estimated AAR in various watersheds of UIB

 AAR
WatershedsLower limitUpper limit
Gilgit 0.04 0.10 
Hunza 0.27 0.40 
Shigar 0.30 0.43 
Shyok 0.14 0.16 
Kharmong 0.38 0.60 
Zanskar 0.30 0.65 
Shingo 0.40 0.50 
Astore 0.33 0.40 
 AAR
WatershedsLower limitUpper limit
Gilgit 0.04 0.10 
Hunza 0.27 0.40 
Shigar 0.30 0.43 
Shyok 0.14 0.16 
Kharmong 0.38 0.60 
Zanskar 0.30 0.65 
Shingo 0.40 0.50 
Astore 0.33 0.40 

Note: The lower limit of the AAR in the Gilgit watershed most likely has a much larger uncertainty than that present in the other estimates.

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