Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland
Calving events of Petermann Glacier, northwest Greenland, in 2010 and 2012 reduced the length of its ice tongue by c. 25 km, allowing exploration of newly uncovered seafloor during the Petermann 2015 Expedition. This article presents the results of foraminiferal analysis and environmental data from...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Taylor & Francis Group
2020
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Online Access: | https://doi.org/10.1080/15230430.2020.1806986 https://doaj.org/article/96a550051e6d4a48acf332d125d30008 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:96a550051e6d4a48acf332d125d30008 2023-05-15T14:14:23+02:00 Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland Anne Jennings John Andrews Brendan Reilly Maureen Walczak Martin Jakobsson Alan Mix Joe Stoner Keith W. Nicholls Maziet Cheseby 2020-01-01 https://doi.org/10.1080/15230430.2020.1806986 https://doaj.org/article/96a550051e6d4a48acf332d125d30008 en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2020.1806986 https://doaj.org/article/96a550051e6d4a48acf332d125d30008 undefined Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 491-511 (2020) greenland petermann ice tongue foraminifera arctic marine geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1080/15230430.2020.1806986 2023-01-22T18:31:39Z Calving events of Petermann Glacier, northwest Greenland, in 2010 and 2012 reduced the length of its ice tongue by c. 25 km, allowing exploration of newly uncovered seafloor during the Petermann 2015 Expedition. This article presents the results of foraminiferal analysis and environmental data from thirteen surface sediment samples in northern Nares Strait and Petermann Fjord, including beneath the modern ice tongue. This is the first study of living foraminifera beneath an arctic ice tongue and the first modern foraminiferal data from this area. Modern assemblages were studied to constrain species environmental preferences and to improve paleoenvironmental interpretations of foraminiferal assemblages. Sub–ice tongue assemblages differed greatly from those at all other sites, with very low faunal abundances and being dominated by agglutinated fauna, likely reflecting low food supply under the ice tongue. Fjord fauna were comprised of 80 percent or more calcareous species. Notably, Elphidium clavatum is absent beneath the ice tongue although it is dominant in the fjord. Increasing primary productivity associated with the transition to mobile sea ice, diminishing influence of the Petermann Glacier meltwater with distance from the grounding line, and increased influence of south-flowing currents in Nares Strait are the important controls on the faunal assemblages. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Foraminifera* glacier Greenland Nares strait Petermann Fjord Petermann glacier Sea ice Unknown Arctic Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Petermann Fjord ENVELOPE(-61.500,-61.500,81.167,81.167) Arctic, Antarctic, and Alpine Research 52 1 491 511 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
greenland petermann ice tongue foraminifera arctic marine geo envir |
spellingShingle |
greenland petermann ice tongue foraminifera arctic marine geo envir Anne Jennings John Andrews Brendan Reilly Maureen Walczak Martin Jakobsson Alan Mix Joe Stoner Keith W. Nicholls Maziet Cheseby Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
topic_facet |
greenland petermann ice tongue foraminifera arctic marine geo envir |
description |
Calving events of Petermann Glacier, northwest Greenland, in 2010 and 2012 reduced the length of its ice tongue by c. 25 km, allowing exploration of newly uncovered seafloor during the Petermann 2015 Expedition. This article presents the results of foraminiferal analysis and environmental data from thirteen surface sediment samples in northern Nares Strait and Petermann Fjord, including beneath the modern ice tongue. This is the first study of living foraminifera beneath an arctic ice tongue and the first modern foraminiferal data from this area. Modern assemblages were studied to constrain species environmental preferences and to improve paleoenvironmental interpretations of foraminiferal assemblages. Sub–ice tongue assemblages differed greatly from those at all other sites, with very low faunal abundances and being dominated by agglutinated fauna, likely reflecting low food supply under the ice tongue. Fjord fauna were comprised of 80 percent or more calcareous species. Notably, Elphidium clavatum is absent beneath the ice tongue although it is dominant in the fjord. Increasing primary productivity associated with the transition to mobile sea ice, diminishing influence of the Petermann Glacier meltwater with distance from the grounding line, and increased influence of south-flowing currents in Nares Strait are the important controls on the faunal assemblages. |
format |
Article in Journal/Newspaper |
author |
Anne Jennings John Andrews Brendan Reilly Maureen Walczak Martin Jakobsson Alan Mix Joe Stoner Keith W. Nicholls Maziet Cheseby |
author_facet |
Anne Jennings John Andrews Brendan Reilly Maureen Walczak Martin Jakobsson Alan Mix Joe Stoner Keith W. Nicholls Maziet Cheseby |
author_sort |
Anne Jennings |
title |
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
title_short |
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
title_full |
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
title_fullStr |
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
title_full_unstemmed |
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland |
title_sort |
modern foraminiferal assemblages in northern nares strait, petermann fjord, and beneath petermann ice tongue, nw greenland |
publisher |
Taylor & Francis Group |
publishDate |
2020 |
url |
https://doi.org/10.1080/15230430.2020.1806986 https://doaj.org/article/96a550051e6d4a48acf332d125d30008 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-61.500,-61.500,81.167,81.167) |
geographic |
Arctic Greenland Nares Petermann Fjord |
geographic_facet |
Arctic Greenland Nares Petermann Fjord |
genre |
Antarctic and Alpine Research Arctic Arctic Foraminifera* glacier Greenland Nares strait Petermann Fjord Petermann glacier Sea ice |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Foraminifera* glacier Greenland Nares strait Petermann Fjord Petermann glacier Sea ice |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 491-511 (2020) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2020.1806986 https://doaj.org/article/96a550051e6d4a48acf332d125d30008 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2020.1806986 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
52 |
container_issue |
1 |
container_start_page |
491 |
op_container_end_page |
511 |
_version_ |
1766286873190203392 |