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Theoretical and Applied Climatology

, Volume 116, Issue 1–2, pp 169–190 | Cite as

Glacier shrinkage driven by climate change during half a century (1954–2007) in the Ortles-Cevedale group (Stelvio National Park, Lombardy, Italian Alps)

  • Carlo D’Agata
  • Daniele BocchiolaEmail author
  • Davide Maragno
  • Claudio Smiraglia
  • Guglielmina Adele Diolaiuti
Original Paper

Abstract

The recent evolution of a representative subset of Alpine glaciers (i.e. 43 glaciers located in the Ortles-Cevedale group, Stelvio National Park, Italy) is described by analysing surface area changes. The database covers half a century of Alpine glacier history (from 1954 to 2007), thus allowing to describe glacier changes on a relatively long time window. Further, the subset of Alpine glaciers chosen for the analysis are among the best known and studied of Italy, also comprising the widest Italian valley glacier. The analysis provided area surface changes as −19.43 km2 ± 1.2 %, approximately −40 %, from 1954 to 2007. Small glaciers contributed strongly to total area loss. The area change rate accelerated lately, with a surface reduction of approximately 8.7 % between 2003 and 2007, i.e. a mean area loss of approximately 0.693 km2/year. The mean yearly loss over the previous periods (1954–1981, 1981–2003 and 1990–2003) were 0.242, 0.436 and 0.476 km2/year, respectively. From a geodynamical perspective, the Ortles-Cevedale group is now experiencing transition from a glacial system to a paraglacial one. The areas where most recently the main shaping and driving factors were glaciers are now subject to the action of melting water, slope evolution and periglacial processes. We also investigated seasonal values of key climatic variables (1951–2007), namely, temperature, precipitation and snow cover in the area, to evaluate their potential effects upon glacier dynamics. We performed linear regression and Mann–Kendall tests to highlight significant non-stationarity and onset of trends of our target climate variables. We investigated the correlation between local weather variables, North Atlantic Oscillation anomalies and global thermal anomaly to highlight the link of local weather patterns against global weather. We further carried out correlation analysis of weather variables (with different lags) against glacier terminus fluctuations during 1951–2006 for the two most studied glaciers of the Ortles-Cevedale group to highlight the response of glaciers to climate variability. We found increased temperature and decreased precipitation and snow cover likely to have driven accelerated glacier’s shrinkage during the last three decades.

Keywords

Lateral Moraine Glacier Surface Differential Global Position System Differential Global Position System Glacier Tongue 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was performed in the framework of a pilot project (named SHARE STELVIO) that is online since 2009. This project, supported by the Lombardy Government through FLA (Fondazione Lombardia per l’Ambiente) and EvK2CNR Committee, is devoted to detecting and quantifying climate change effects and impacts in the area of the Stelvio National Park (Lombardy, Italy). The authors are grateful to the Lombardy Region for the support in the research. The aerial photos and the 2003 and 2007 orthophotos were analysed in cooperation with the Infrastructure for the Territory Information Unit of the Lombardy Region through an agreement between Lombardy Region and the University of Milan. The Orthophoto 2003 and 2007 (Terraitaly 2003 and 2007) was produced by Blom CGR. Daniele Bocchiola acknowledges the support of the “I-CARE” project funded by Politecnico di Milano.

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Copyright information

© Springer-Verlag Wien 2013

Authors and Affiliations

  • Carlo D’Agata
    • 1
  • Daniele Bocchiola
    • 2
    • 3
    Email author
  • Davide Maragno
    • 1
  • Claudio Smiraglia
    • 1
    • 3
  • Guglielmina Adele Diolaiuti
    • 1
    • 3
  1. 1.Dipartimento di Scienze della Terra “A. Desio”Università degli Studi di MilanoMilanItaly
  2. 2.DICA Politecnico di MilanoMilanItaly
  3. 3.EVK2CNR CommitteeBergamoItaly

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