Journal
JOURNAL OF GLACIOLOGY
Volume 67, Issue 261, Pages 117-125Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jog.2020.88
Keywords
Glacier mass balance; glacier monitoring; mountain glaciers
Funding
- CRYOBS-CLIM
- IR OZCAR
- French National Research Agency (ANR) [ANR-13-SENV-0005-04/05-PRESHINE]
- Labex OSUG@2020 (Investissements d'avenir) [ANR10 LABX56]
- JEAI HIMALICE
- French Space Agency (CNES)
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The 2007-19 glaciological mass balance series of Mera Glacier in the Everest Region, East Nepal, was reanalyzed using geodetic measurements. The results show that Mera Glacier has been losing mass at a rate of 0.41 meters per year, in general agreement with regional averages for the central Himalaya.
The 2007-19 glaciological mass-balance series of Mera Glacier in the Everest Region, East Nepal, is reanalysed using the geodetic mass balance assessed by differencing two DEMs obtained from Pleiades stereo-images acquired in November 2012 and in October 2018. The glaciological glacier-wide annual mass balance of Mera Glacier has to be systematically decreased by 0.11 m w.e. a(-1) to match the geodetic mass balance. We attribute part of the positive bias of the glaciological mass balance to an over-estimation of the accumulation above 5520 m a.s.l., likely due to a measurement network unable to capture its spatial variability. Over the period 2007-19, Mera Glacier has lost mass at a rate of -0.41 +/- 0.20 m w.e. a(-1), in general agreement with regional averages for the central Himalaya. We observe a succession of negative mass-balance years since 2013.
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