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Climate Dynamics

, Volume 35, Issue 5, pp 757–770 | Cite as

Influence of seasonality on glacier mass balance, and implications for palaeoclimate reconstructions

  • Nicholas GolledgeEmail author
  • Alun Hubbard
  • Tom Bradwell
Article

Abstract

Climates inferred from former glacier geometries in some areas exhibit discrepancies with regional palaeoclimates predicted by General Circulation Models (GCMs) and modelling of palaeoecological data, possibly as a consequence of their differing treatments of climatic seasonality. Since glacier-based climate reconstructions potentially offer an important tool in the calibration of GCMs, which themselves need validation if used to predict future climate scenarios, we attempt to resolve mismatches between these techniques by (1) investigating the influence of seasonality on glacier mass balance, and (2) refining the methodology used for the derivation of glacier-based palaeoclimates. Focussing on the Younger Dryas stadial glaciation of Scotland, northeast Atlantic, we show that sea-ice amplified seasonality led to a significantly drier climate than has been suggested by glacier-based interpretations. This was characterised by a relatively short ablation season and the survival of a more substantial winter snowpack. We suggest that if palaeoglaciological studies were to account for changes in seasonal temperature and precipitation variability, their results would agree more closely with the cold, arid, northeast Atlantic palaeoenvironment predicted by atmospheric modelling and northwest European pollen studies, and would therefore provide more accurate constraints for GCM calibration.

Keywords

Seasonality Mass balance Glaciers Palaeoclimate Younger Dryas 

Notes

Acknowledgments

Constructive reviews by two anonymous reviewers helped focus the paper. TB publishes with the permission of the Executive Director of BGS (NERC).

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Antarctic Research CentreVictoria University of WellingtonWellingtonNew Zealand
  2. 2.Institute of Geography and Earth SciencesThe University of WalesAberystwythUK
  3. 3.British Geological Survey, Murchison HouseEdinburghUK

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