IMIS | Lifewatch regional portal

You are here

IMIS

[ report an error in this record ]basket (0): add | show Print this page

Evolution of the Cook Ice Cap (Kerguelen Islands) between the last centuries and 2100 ce based on cosmogenic dating and glacio-climatic modelling
Verfaillie, D.; Charton, J.; Schimmelpfennig, I.; Stroebele, Z.; Jomelli, V.; Bétard, F.; Favier, V.; Cavero, J.; Berthier, E.; Goosse, H.; Rinterknecht, V.; Legentil, C.; Charrassin, R.; Aumaître, G.; Bourlès, D.L.; Keddadouche, K. (2021). Evolution of the Cook Ice Cap (Kerguelen Islands) between the last centuries and 2100 ce based on cosmogenic dating and glacio-climatic modelling. Antarctic Science 33(3): 301-317. https://dx.doi.org/10.1017/S0954102021000080
In: Antarctic Science. Cambridge University Press: Oxford. ISSN 0954-1020; e-ISSN 1365-2079, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal
Author keywords
    degree-day glaciological model; future projections; glacial fluctuations; in situ cosmogenic chlorine-36 dating; moraines; sub-Antarctic islands

Authors  Top 
  • Verfaillie, D., more
  • Charton, J.
  • Schimmelpfennig, I.
  • Stroebele, Z.
  • Jomelli, V.
  • Bétard, F.
  • Favier, V.
  • Cavero, J.
  • Berthier, E.
  • Goosse, H., more
  • Rinterknecht, V.
  • Legentil, C.
  • Charrassin, R.
  • Aumaître, G.
  • Bourlès, D.L.
  • Keddadouche, K.

Abstract
    The Cook Ice Cap (CIC) on the sub-Antarctic Kerguelen Islands recently experienced extremely negative surface mass balance. Further deglaciation could have important impacts on endemic and invasive fauna and flora. To put this exceptional glacier evolution into a multi-centennial-scale context, we refined the evolution of the CIC over the last millennium, investigated the associated climate conditions and explored its potential evolution by 2100 CE. A glaciological model, constrained by cosmic ray exposure dating of moraines, historical documents and recent direct mass balance observations, was used to simulate the ice-cap extents during different phases of advance and retreat between the last millennium and 2100 CE. Cosmogenic dating suggests glacial advance around the early Little Ice Age (LIA), consistent with findings from other sub-Antarctic studies, and the rather cold and humid conditions brought about by the negative phase of the Southern Annular Mode (SAM). This study contributes to our currently limited understanding of palaeoclimate for the early LIA in the southern Indian Ocean. Glaciological modelling and observations confirm the recent decrease in CIC extent linked to the intensification of the SAM. Although affected by large uncertainties, future simulations suggest a complete disappearance of CIC by the end of the century.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors