Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland
Internal tephra layers of known age have been detected by radio-echo soundings within the Mýrdalsjökull and Vatnajökull ice caps in Iceland. Assuming steady state, the estimated strain rates since these isochrones were deposited on the glacier surface have been used to calculate past average specifi...
Published in: | Annals of Glaciology |
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International Glaciological Society
2005
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Online Access: | https://oceanrep.geomar.de/id/eprint/29245/ https://oceanrep.geomar.de/id/eprint/29245/1/Brandt%20et.al.pdf https://doi.org/10.3189/172756405781813078 |
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ftoceanrep:oai:oceanrep.geomar.de:29245 2023-05-15T13:29:43+02:00 Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland Brandt, Ola Björnsson, Helgi Gjessing, Yngvar 2005 text https://oceanrep.geomar.de/id/eprint/29245/ https://oceanrep.geomar.de/id/eprint/29245/1/Brandt%20et.al.pdf https://doi.org/10.3189/172756405781813078 en eng International Glaciological Society https://oceanrep.geomar.de/id/eprint/29245/1/Brandt%20et.al.pdf Brandt, O., Björnsson, H. and Gjessing, Y. (2005) Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland. Annals of Glaciology, 42 (1). pp. 284-290. DOI 10.3189/172756405781813078 <https://doi.org/10.3189/172756405781813078>. doi:10.3189/172756405781813078 Article PeerReviewed 2005 ftoceanrep https://doi.org/10.3189/172756405781813078 2023-04-07T15:20:06Z Internal tephra layers of known age have been detected by radio-echo soundings within the Mýrdalsjökull and Vatnajökull ice caps in Iceland. Assuming steady state, the estimated strain rates since these isochrones were deposited on the glacier surface have been used to calculate past average specific net balance rates in the accumulation zones along three flowlines on Mýrdalsjökull and one on Vatnajökull. For the period 1918–91 the specific mass-balance rate has been estimated to 4.5 and 3.5 m a−1 at 1350 m a.s.l. on the southern and northern slopes of Mýrdalsjökull, respectively. At 1800 m elevation on the Bárdarbunga ice dome in Vatnajökull, the specific net balance averaged over the last three centuries is estimated to be about 2.1 m a−1. Given this specific net balance, a revised age–depth timescale is presented for a 400 m deep ice core recovered in 1972 from Bárdarbunga. The ice at the bottom is estimated to be from AD 1750. Article in Journal/Newspaper Annals of Glaciology glacier ice core Iceland Mýrdalsjökull Vatnajökull OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Mýrdalsjökull ENVELOPE(-19.174,-19.174,63.643,63.643) Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Annals of Glaciology 42 284 290 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Internal tephra layers of known age have been detected by radio-echo soundings within the Mýrdalsjökull and Vatnajökull ice caps in Iceland. Assuming steady state, the estimated strain rates since these isochrones were deposited on the glacier surface have been used to calculate past average specific net balance rates in the accumulation zones along three flowlines on Mýrdalsjökull and one on Vatnajökull. For the period 1918–91 the specific mass-balance rate has been estimated to 4.5 and 3.5 m a−1 at 1350 m a.s.l. on the southern and northern slopes of Mýrdalsjökull, respectively. At 1800 m elevation on the Bárdarbunga ice dome in Vatnajökull, the specific net balance averaged over the last three centuries is estimated to be about 2.1 m a−1. Given this specific net balance, a revised age–depth timescale is presented for a 400 m deep ice core recovered in 1972 from Bárdarbunga. The ice at the bottom is estimated to be from AD 1750. |
format |
Article in Journal/Newspaper |
author |
Brandt, Ola Björnsson, Helgi Gjessing, Yngvar |
spellingShingle |
Brandt, Ola Björnsson, Helgi Gjessing, Yngvar Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
author_facet |
Brandt, Ola Björnsson, Helgi Gjessing, Yngvar |
author_sort |
Brandt, Ola |
title |
Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
title_short |
Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
title_full |
Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
title_fullStr |
Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
title_full_unstemmed |
Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland |
title_sort |
mass-balance rates derived by mapping internal tephra layers in mýrdalsjökull and vatnajökull ice caps, iceland |
publisher |
International Glaciological Society |
publishDate |
2005 |
url |
https://oceanrep.geomar.de/id/eprint/29245/ https://oceanrep.geomar.de/id/eprint/29245/1/Brandt%20et.al.pdf https://doi.org/10.3189/172756405781813078 |
long_lat |
ENVELOPE(-19.174,-19.174,63.643,63.643) ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Mýrdalsjökull Vatnajökull |
geographic_facet |
Mýrdalsjökull Vatnajökull |
genre |
Annals of Glaciology glacier ice core Iceland Mýrdalsjökull Vatnajökull |
genre_facet |
Annals of Glaciology glacier ice core Iceland Mýrdalsjökull Vatnajökull |
op_relation |
https://oceanrep.geomar.de/id/eprint/29245/1/Brandt%20et.al.pdf Brandt, O., Björnsson, H. and Gjessing, Y. (2005) Mass-balance rates derived by mapping internal tephra layers in Mýrdalsjökull and Vatnajökull ice caps, Iceland. Annals of Glaciology, 42 (1). pp. 284-290. DOI 10.3189/172756405781813078 <https://doi.org/10.3189/172756405781813078>. doi:10.3189/172756405781813078 |
op_doi |
https://doi.org/10.3189/172756405781813078 |
container_title |
Annals of Glaciology |
container_volume |
42 |
container_start_page |
284 |
op_container_end_page |
290 |
_version_ |
1766002331678146560 |