Polar Urals glaciers variability

 

Mikhail. N. Ivanov

Book of abstracts The 10th Arctic Science Summit Week (ASSW 2009). – Bergen, Norway

 

 

 High-latitude alpine glaciers are sensitive climate indicators and the most greatly they respond on the Arctic’s climate changing. Existing at the limit of possibility glaciers of the Polar Ural mountains are reliable object for monitoring of nature fluctuations. The study region is located between 68º10’ and 67º30´N, where the maximum of glaciers is concentrated, which are the 50% of glaciation area of Polar Ural. First glaciers discovered in 1938. The static glaciological investigations were in progress in 1958–81 on IGAN and Obrucheva glaciers. In 1947, 53, 58, 60, 68, 73, 89 was made aerial survey and topographical plan for glaciers, received ASTER-2000. The DGPS survey of Obrucheva and IGAN made in 2008.

 

 

 

Fig. 1. Anuchin glacier in 1938 (A.Chabakov), 1960 (L.Troitskiy), 2005 (G.Nosenko)

 

The main topics of this report are the revision, generalization of collected data, making detailed diagrammatic curves of glacier’s size fluctuations for the modeling task solution. Data from the 1932, 1947, 1953, 1960, 1973 1982–2008 are important for the detailed reconstruction of fluctuations line of glacier’s square area, length and the surface altitude and their connection with climate.

  

 

 

Fig. 2. Fluctuations of MGU glacier.

 

For the glacier’s fluctuations estimation numerical models of the surface, based on the topoplans were made. On this numerical models the contours of glaciers for different years were overlaid. Size, square area and surface altitude fluctuations were calculated. The material of moraine research was generalized too. The photographs of glaciers from different years are collecting for the new “Catalogue of repeated images”, which will represent climate and nature environment changing.
 

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