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Closing the mass bu...
Closing the mass budget of a tidewater glacier : the example of Kronebreen, Svalbard
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- Deschamps-Berger, Cesar (författare)
- Univ Oslo, Dept Geosci, POB 1047, N-0316 Oslo, Norway;Univ Toulouse, LEGOS, CNES, CNRS,IRD,UPS, F-31400 Toulouse, France;UPS, CNRS, CESBIO, IRD,CNES,INRS, F-31400 Toulouse, France
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- Nuth, Christopher (författare)
- Univ Oslo, Dept Geosci, POB 1047, N-0316 Oslo, Norway
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- Van Pelt, Ward (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Berthier, Etienne (författare)
- Univ Toulouse, LEGOS, CNES, CNRS,IRD,UPS, F-31400 Toulouse, France
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- Kohler, Jack (författare)
- Norwegian Polar Res Inst, Polar Environm Ctr, NO-9296 Tromso, Norway
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- Altena, Bas (författare)
- Univ Oslo, Dept Geosci, POB 1047, N-0316 Oslo, Norway
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(creator_code:org_t)
- 2019-01-24
- 2019
- Engelska.
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Ingår i: Journal of Glaciology. - : Cambridge University Press (CUP). - 0022-1430 .- 1727-5652. ; 65:249, s. 136-148
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Abstract
Ämnesord
Stäng
- In this study, we combine remote sensing, in situ and model-derived datasets from 1966 to 2014 to calculate the mass-balance components of Kronebreen, a fast-flowing tidewater glacier in Svalbard. For the well-surveyed period 2009-2014, we are able to close the glacier mass budget within the prescribed errors. During these 5 years, the glacier geodetic mass balance was -0.69 +/- 0.12 m w.e. a(-1), while the mass budget method led to a total mass balance of -0.92 +/- 0.16 m w.e. a(-1), as a consequence of a strong frontal ablation (-0.78 +/- 0.11 m w.e. a(-1) ), and a slightly negative climatic mass balance (-0.14 +/- 0.11 m w.e. a(-1) ). The trend towards more negative climatic mass balance between 1966-1990 (+0.20 +/- 0.05 m w.e. a(-1) ) and 2009-2014 is not reflected in the geodetic mass balance trend. Therefore, we suspect a reduction in ice-discharge in the most recent period. Yet, these multidecadal changes in ice-discharge cannot be measured from the available observations and thus are only estimated with relatively large errors as a residual of the mass continuity equation. Our study presents the multidecadal evolution of the dynamics and mass balance of a tidewater glacier and illustrates the errors introduced by inferring one unmeasured mass-balance component from the others.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
Nyckelord
- glaciological instruments and methods
- glacier mass balance
- remote sensing
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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