Accelerating Glacier Area Loss Across the Andes Since the Little Ice Age

Abstract Andean glaciers are losing mass rapidly but a centennial‐scale context to those rates is lacking. Here we show the extent of >5,500 glaciers during the Little Ice Age chronozone (LIA; c. 1,400 to c. 1,850) and compute an overall area change of −25% from then to year 2000 at an average ra...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Jonathan L. Carrivick, Morwenna Davies, Ryan Wilson, Bethan J. Davies, Tom Gribbin, Owen King, Antoine Rabatel, Juan‐Luis García, Jeremy C. Ely
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2024
Subjects:
glacier
ice cap
little ice age
andes
icefield
Geophysics. Cosmic physics
QC801-809
Ice cap
Online Access:https://doi.org/10.1029/2024GL109154
https://doaj.org/article/202d154977c44c31af4f7a436fa18803
Description
Summary:Abstract Andean glaciers are losing mass rapidly but a centennial‐scale context to those rates is lacking. Here we show the extent of >5,500 glaciers during the Little Ice Age chronozone (LIA; c. 1,400 to c. 1,850) and compute an overall area change of −25% from then to year 2000 at an average rate of −36.5 km2 yr−1 or −0.11% yr−1. Glaciers in the Tropical Andes (Peru, Bolivia) have depleted the most; median −56% of LIA area, and the fastest; median −0.16% yr−1. Up to 10 × acceleration in glacier area loss has occurred in Tropical mountain sub‐regions comparing LIA to 2,000 rates to post‐2000 rates. Regional climate controls inter‐regional variability, whereas local factors affect intra‐region glacier response time. Analyzing glacier area change by river basins and by protected areas leads us to suggest that conservation and environmental management strategies should be re‐visited as proglacial areas expand.

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