Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula
Glaciers cover 132 900 km2 around the Antarctic Ice Sheet, but few are subject to annual mass-balance measurements. Lookalike Glacier and Davies Dome on James Ross Island have been monitored since 2009, providing the third longest mass-balance record for the northern Antarctic Peninsula. These glaci...
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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143024000169/type/journal_article |
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| author | Zbyněk Engel Kamil Láska Jana Smolíková Jan Kavan |
| author_facet | Zbyněk Engel Kamil Láska Jana Smolíková Jan Kavan |
| author_sort | Zbyněk Engel |
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| description | Glaciers cover 132 900 km2 around the Antarctic Ice Sheet, but few are subject to annual mass-balance measurements. Lookalike Glacier and Davies Dome on James Ross Island have been monitored since 2009, providing the third longest mass-balance record for the northern Antarctic Peninsula. These glaciers had a balanced mass budget over the period 2009/10–2014/15 but started to lose their mass thereafter. Between 2014/15 and 2020/21, mass change rates were −0.15 ± 0.13 and −0.26 ± 0.11 m w.e. a−1 for Lookalike Glacier and Davies Dome, respectively. The mean equilibrium-line altitudes over this period at Lookalike Glacier (362 ± 18 m a.s.l.) and Davies Dome (>427 ± 22 m a.s.l.) are 51 and >34 m higher compared to the previous 6-year period. The mean accumulation area ratio values determined for the period 2014/15–2020/21 are lower than the balanced-budget ratio indicating that glaciers are out of balance with the current climate. The data confirm the transition from positive to negative mass-balance periods around 2014/15, which is attributed to the change in air temperature trends. The mean summer temperature increased by 0.9°C between the periods 2009/10–2014/15 and 2015/16–2020/21 and melt-season temperatures became predominantly positive. |
| format | Article |
| id | doaj-art-5075f5ae4a2e41ca956ca46593309128 |
| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
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| series | Journal of Glaciology |
| spelling | doaj-art-5075f5ae4a2e41ca956ca465933091282025-01-16T21:49:58ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2024.16Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic PeninsulaZbyněk Engel0https://orcid.org/0000-0002-5209-7823Kamil Láska1Jana Smolíková2Jan Kavan3https://orcid.org/0000-0003-4524-3009Faculty of Science, Department of Physical Geography and Geoecology, Charles University, Praha, Czech RepublicFaculty of Science, Department of Geography, Masaryk University, Brno, Czech RepublicFaculty of Science, Department of Physical Geography and Geoecology, Charles University, Praha, Czech Republic Faculty of Science, Department of Geography, Masaryk University, Brno, Czech RepublicFaculty of Science, Department of Geography, Masaryk University, Brno, Czech Republic Faculty of Science, University of South Bohemia, Centre for Polar Ecology, České Budějovice, Czech RepublicGlaciers cover 132 900 km2 around the Antarctic Ice Sheet, but few are subject to annual mass-balance measurements. Lookalike Glacier and Davies Dome on James Ross Island have been monitored since 2009, providing the third longest mass-balance record for the northern Antarctic Peninsula. These glaciers had a balanced mass budget over the period 2009/10–2014/15 but started to lose their mass thereafter. Between 2014/15 and 2020/21, mass change rates were −0.15 ± 0.13 and −0.26 ± 0.11 m w.e. a−1 for Lookalike Glacier and Davies Dome, respectively. The mean equilibrium-line altitudes over this period at Lookalike Glacier (362 ± 18 m a.s.l.) and Davies Dome (>427 ± 22 m a.s.l.) are 51 and >34 m higher compared to the previous 6-year period. The mean accumulation area ratio values determined for the period 2014/15–2020/21 are lower than the balanced-budget ratio indicating that glaciers are out of balance with the current climate. The data confirm the transition from positive to negative mass-balance periods around 2014/15, which is attributed to the change in air temperature trends. The mean summer temperature increased by 0.9°C between the periods 2009/10–2014/15 and 2015/16–2020/21 and melt-season temperatures became predominantly positive.https://www.cambridge.org/core/product/identifier/S0022143024000169/type/journal_articleAntarctic glaciologyclimate changeglacier mass balanceglacier meteorologyglacier volume |
| spellingShingle | Zbyněk Engel Kamil Láska Jana Smolíková Jan Kavan Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula Journal of Glaciology Antarctic glaciology climate change glacier mass balance glacier meteorology glacier volume |
| title | Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula |
| title_full | Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula |
| title_fullStr | Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula |
| title_full_unstemmed | Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula |
| title_short | Recent change in surface mass-balance trends of glaciers on James Ross Island, north-eastern Antarctic Peninsula |
| title_sort | recent change in surface mass balance trends of glaciers on james ross island north eastern antarctic peninsula |
| topic | Antarctic glaciology climate change glacier mass balance glacier meteorology glacier volume |
| url | https://www.cambridge.org/core/product/identifier/S0022143024000169/type/journal_article |
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