In:
Boreas, Wiley, Vol. 41, No. 2 ( 2012-04), p. 277-291
Abstract:
Two glacial deposits in the G esso valley ( M aritime, A lps) have been 10 Be ‐dated at 20 140±1080 (weighted mean± SD ) and 16 590±970 years, respectively, thus constraining the L ast G lacial M aximum ( LGM ) and G schnitz stadials in the southwestern part of the A lps. The LGM age is chronologically coherent with MIS 2 and synchronous with most other LGM moraines in the A lps. The G schnitz stadial also appears to be in agreement with the ages obtained from other A lpine sites and with H einrich E vent I . This suggests that the A lpine glaciers reacted simultaneously and essentially synchronously with the climate change associated with H einrich E vent 1. The E quilibrium L ine A ltitudes ( ELA s) of the LGM and G schnitz reconstructed palaeoglaciers are 1850 and 1910 m a.s.l., respectively. The ELA comparison across the A lps indicates that the palaeoclimate of the M aritime A lps during the LGM was rather different from that of other A lpine sectors. However, the similar G schnitz ELA value between the G esso valley and other sites across the mountain chain indicates that Alpine glaciers responded with the same intensity to the climate change associated with H einrich E vent I . Overall, these results suggest that the interaction between the atmospheric circulation of air masses and local A lpine orography was more complex than has previously been argued.
Type of Medium:
Online Resource
ISSN:
0300-9483
,
1502-3885
DOI:
10.1111/bor.2012.41.issue-2
DOI:
10.1111/j.1502-3885.2011.00233.x
Language:
English
Publisher:
Wiley
Publication Date:
2012
detail.hit.zdb_id:
2028632-6
detail.hit.zdb_id:
185110-X
SSG:
14
Permalink