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(Article of periodic en Anglais - 1981)

Document title

Equilibrium line altitudes of late Pleistocene and recent glaciers in Central Mexico

Authors(s) and Affiliation(s)

WHITE S. E. ;

Abstract

Existing and former equilibrium line altitudes (ELAs) are calculated for present and past glaciers on volcanoes Iztaccihuatl, Popocatépetl and Ajusco. ELAs for past substages of glaciation on Iztaccihuatl were 1370 m below present ELA (during Tomicoxco Substage), 100 m below (Diamantes First Advance), 910 m below (Diamantes Second Advance), about 720 m below (Alcalican I), about 630 m below (Alcalican II), and 245 m below (Ayolotepito Stade). Mid-Neoglaciation ELA on Popocatépetl was 195 m below present ELA, and Late Neoglaciation (1906) ELA 90 m below. Late Pleistocene and Recent temperature coolings to accomplish these glaciations are about 8 C during probable Bull Lake equivalents, about 6, 5, and 4 C during Pinedale equivalents, and about 1.5 to 0.5 C during Neoglaciation Stades.

Source

Article of periodic

published at : Geografiska annaler Serie A physical geography Stockholm

Editor :

Millesime : 1981, vol. 63, no3-4 [pp. 241-249]

Bibliographic references : 17 réf.

Language

Anglais

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