Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland
Modern foraminiferal assemblages in northern Nares Strait, Petermann Fjord, and beneath Petermann ice tongue, NW Greenland
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内雷斯海峡北部、彼得曼峡湾和格陵兰西北部彼得曼冰舌下方的现代有孔虫组合
DOI:
10.1080/15230430.2020.1806986
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
M. Cheseby
中科院分区:
文献类型:
--
作者:
A. Jennings;J. Andrews;B. Reilly;M. Walczak;M. Jakobsson;A. Mix;J. Stoner;K. Nicholls;M. Cheseby
ABSTRACT 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.
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影响因子:
3.4
作者:
WASHAM, PETER;NICHOLLS, KEITH W.;MÜNCHOW, ANDREAS;PADMAN, LAURIE
通讯作者:
PADMAN, LAURIE
DOI:
10.1177/0959683612460785
发表时间:
2013-03
期刊:
The Holocene
影响因子:
--
作者:
K. Perner;M. Moros;A. Jennings;J. Lloyd;K. Knudsen
通讯作者:
K. Perner;M. Moros;A. Jennings;J. Lloyd;K. Knudsen
影响因子:
2.8
作者:
Münchow, Andreas;Padman, Laurie;Washam, Peter;Nicholls, Keith
通讯作者:
Nicholls, Keith
影响因子:
1.1
作者:
Jennings, Anne E.;Seidenkrantz, Marit-Solveig;Knudsen, Karen Luise
通讯作者:
Knudsen, Karen Luise
影响因子:
3.5
作者:
Washam, P.;Münchow, A.;Nicholls, K. W.
通讯作者:
Nicholls, K. W.