This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.
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Abstract
The Fedchenko Glacier in Tajikistan's central Pamir region is one of Asia's
longest glacier and has been a focal point for scientific investigation
spanning the 20th and 21st centuries, yielding a valuable historical
dataset for Central Asia. This study explores elevation changes from 1928
to 2021 from topographic maps from 1928 and 1958, KH-9 spy satellite
data from 1980, SPOT5 satellite data from 2011, and Pléiades satellite
data from 2017, 2019, and 2021, along with GNSS surveys for absolute
co-registration. The 93-year mean rate of elevation change is -0.46 m yr-
1. Notably, the tongue's thinning rate is twice as negative as the longterm
average in two sub-periods (1958-1980 and 2010-2021), possibly
linked to a surge-like event for the earlier period. Analyses of ERA5
reanalysis (1950-2021) and Fedchenko meteorological station data
(1936-1991) reveal a dry anomaly in 1958-1980 followed by a wet
anomaly in 1980-2010, potentially offsetting temperature-induced mass
losses. The contemporary thinning rates align with a broader trend of
generalised mass losses in the Pamir region.
DOI
https://doi.org/10.31223/X5CX1H
Subjects
Climate, Other Oceanography and Atmospheric Sciences and Meteorology
Keywords
Dates
Published: 2024-07-29 01:54
Last Updated: 2024-07-29 08:54
License
CC-BY Attribution-NonCommercial-ShareAlike 4.0 International
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