Suretta Sud Glacier - Servizio Glaciologico Lombardo

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2008 glaciological Survey ANALYSIS OF VARIATIONS This chapter presents data and information collected during the 2008 surveys. The dynamic phase of each glacier is evaluated on the basis of the last available survey. Variations versus 2007 All 47 glaciers, when compared with their 2007 data, are in a shrinking phase, with a net prevalence (80,8%) of strong and moderate decrements. The tendency of the last years is confirmed and 2008 is the 4th consecutive year in which 100% of sampled glaciers were reported in a decrement phase when compared against their previous survey. The statistical analysis highlights the negative peak of the Ortles–Cevedale Sector, with 4 strong decrements and 7 moderate decrements. Tab. 3: 2008 dynamic phases of Lombardy glaciers. Mountain sector extinct Decrement phase strong moderate slight - 26 - Stable Increment phase Spluga-Lei 0 1 1 2 0 0 0 0 0 1 4 Codera-Masino 0 0 2 1 0 0 0 0 0 0 3 Disgrazia-Mallero 0 0 5 3 0 0 0 0 0 0 8 Bernina 0 1 3 1 0 0 0 0 0 0 5 Scalino-Painale 0 1 0 0 0 0 0 0 0 0 1 Dosdè-Piazzi 0 1 2 0 0 0 0 0 0 0 3 Livigno 0 1 2 0 0 0 0 0 0 0 3 Ortles-Cevedale 0 4 7 0 0 0 0 0 0 0 11 Adamello 0 2 3 0 0 0 0 0 0 0 5 Orobie 0 0 2 2 0 0 0 0 0 0 4 Total 0 11 27 9 0 0 0 0 0 0 47 % 0% 23,4% 57,4% 19,2% 0% 0% 0% 0% 0% 0% 100% Totali 47 0 0 0 0 47 % 100% 0% 0% 0% 0% 100% Tab. 4: The overall dynamic phase of Lombardy glaciers over the last 7 hydrological years. Hydrological year % Decreasing glaciers % Stable glaciers slight moderate strong % Increasing glaciers New Uncertain Total % Uncertain glaciers 2001-2002 90,4 6,7 1,0 1,9 2002-2003 100,0 0,0 0,0 0,0 2003-2004 73,6 8,0 17,3 1,1 2004-2005 100,0 0,0 0,0 0,0 2005-2006 100,0 0,0 0,0 0,0 2006-2007 100,0 0,0 0,0 0,0 2007-2008 100,0 0,0 0,0 0,0
Fig. 1: The dynamic index of glaciers surveyed during the 2008 glaciological survey, as % over the total number (each column shows the total number of glaciers in that class). Fig. 2: The Vedretta del Mandrone on September 20, 2008, when the the reading of the ablation stakes at the snout of the glacier took place. The glacier was covered by 10 cm of fresh snow fallen a few days earlier that had ended the 2008 ablation season (photo by A. Toffaletti). - 27 - 2008 glaciological Survey
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Suretta Sud Glacier - Servizio Glaciologico Lombardo

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