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Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard
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| Zeitschriftentitel: | Journal of Glaciology |
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| Personen und Körperschaften: | , , , , , |
| In: | Journal of Glaciology, 65, 2019, 249, S. 136-148 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Cambridge University Press (CUP)
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| Schlagwörter: |
| author_facet |
DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS |
|---|---|
| author |
DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS |
| spellingShingle |
DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS Journal of Glaciology Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard Earth-Surface Processes |
| author_sort |
deschamps-berger, cesar |
| spelling |
DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS 0022-1430 1727-5652 Cambridge University Press (CUP) Earth-Surface Processes http://dx.doi.org/10.1017/jog.2018.98 <jats:title>ABSTRACT</jats:title><jats:p>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<jats:sup>−1</jats:sup>, while the mass budget method led to a total mass balance of −0.92 ± 0.16 m w.e. a<jats:sup>−1</jats:sup>, as a consequence of a strong frontal ablation (−0.78 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>), and a slightly negative climatic mass balance (−0.14 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>). The trend towards more negative climatic mass balance between 1966–1990 (+0.20 ± 0.05 m w.e. a<jats:sup>−1</jats:sup>) 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.</jats:p> Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard Journal of Glaciology |
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Cambridge University Press (CUP), 2019 |
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| title |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_unstemmed |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_full |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_fullStr |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_full_unstemmed |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_short |
Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_sort |
closing the mass budget of a tidewater glacier: the example of kronebreen, svalbard |
| topic |
Earth-Surface Processes |
| url |
http://dx.doi.org/10.1017/jog.2018.98 |
| publishDate |
2019 |
| physical |
136-148 |
| description |
<jats:title>ABSTRACT</jats:title><jats:p>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<jats:sup>−1</jats:sup>, while the mass budget method led to a total mass balance of −0.92 ± 0.16 m w.e. a<jats:sup>−1</jats:sup>, as a consequence of a strong frontal ablation (−0.78 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>), and a slightly negative climatic mass balance (−0.14 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>). The trend towards more negative climatic mass balance between 1966–1990 (+0.20 ± 0.05 m w.e. a<jats:sup>−1</jats:sup>) 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.</jats:p> |
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| description | <jats:title>ABSTRACT</jats:title><jats:p>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<jats:sup>−1</jats:sup>, while the mass budget method led to a total mass balance of −0.92 ± 0.16 m w.e. a<jats:sup>−1</jats:sup>, as a consequence of a strong frontal ablation (−0.78 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>), and a slightly negative climatic mass balance (−0.14 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>). The trend towards more negative climatic mass balance between 1966–1990 (+0.20 ± 0.05 m w.e. a<jats:sup>−1</jats:sup>) 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.</jats:p> |
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| spelling | DESCHAMPS-BERGER, CESAR NUTH, CHRISTOPHER VAN PELT, WARD BERTHIER, ETIENNE KOHLER, JACK ALTENA, BAS 0022-1430 1727-5652 Cambridge University Press (CUP) Earth-Surface Processes http://dx.doi.org/10.1017/jog.2018.98 <jats:title>ABSTRACT</jats:title><jats:p>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<jats:sup>−1</jats:sup>, while the mass budget method led to a total mass balance of −0.92 ± 0.16 m w.e. a<jats:sup>−1</jats:sup>, as a consequence of a strong frontal ablation (−0.78 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>), and a slightly negative climatic mass balance (−0.14 ± 0.11 m w.e. a<jats:sup>−1</jats:sup>). The trend towards more negative climatic mass balance between 1966–1990 (+0.20 ± 0.05 m w.e. a<jats:sup>−1</jats:sup>) 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.</jats:p> Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard Journal of Glaciology |
| spellingShingle | DESCHAMPS-BERGER, CESAR, NUTH, CHRISTOPHER, VAN PELT, WARD, BERTHIER, ETIENNE, KOHLER, JACK, ALTENA, BAS, Journal of Glaciology, Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard, Earth-Surface Processes |
| title | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_full | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_fullStr | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_full_unstemmed | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_short | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| title_sort | closing the mass budget of a tidewater glacier: the example of kronebreen, svalbard |
| title_unstemmed | Closing the mass budget of a tidewater glacier: the example of Kronebreen, Svalbard |
| topic | Earth-Surface Processes |
| url | http://dx.doi.org/10.1017/jog.2018.98 |