IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean)
The Lomonosov Ridge, crossing the Arctic Ocean from Greenland to the New Siberian Islands and separating the Eurasian and Amerasian basins, underlies an area with nearly permant ice cover. Satellite passive microwave ice concentration data show that the southern Lomonosov Ridge, close to the Eurasia...
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ftawi:oai:epic.awi.de:20886 2024-09-15T17:51:01+00:00 IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) Fahl, Kirsten Luttmer, Walter 2009 https://epic.awi.de/id/eprint/20886/ https://hdl.handle.net/10013/epic.33187 unknown Fahl, K. orcid:0000-0001-9317-4656 and Luttmer, W. (2009) IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) , 24th International Meeting on Organic Geochemistry, Bremen, Germany. September 2009. Abstract No. P439. . hdl:10013/epic.33187 EPIC324th International Meeting on Organic Geochemistry, Bremen, Germany. September 2009. Abstract No. P439., 06 Conference notRev 2009 ftawi 2024-06-24T04:01:33Z The Lomonosov Ridge, crossing the Arctic Ocean from Greenland to the New Siberian Islands and separating the Eurasian and Amerasian basins, underlies an area with nearly permant ice cover. Satellite passive microwave ice concentration data show that the southern Lomonosov Ridge, close to the Eurasian continental margin, is generally covered by more than 95% ice during most of the season, and even during summer ice concentration remains above 90%. Sea-ice cover in the study area, however, shows a distinct interannual variability, and sometimes ice-free areas occur [1]. Because of the extensive sea-ice cover and light limitation, primary production is restricted to a period of about three months during summer.Data on biomarker composition and fluxes using long-term sediment traps are still very rare in the Northern High Latitudes and are restricted to the arctic marginal seas and sub-arctic regions. Here, data on the variability of biomarker composition (as proxy for marine and terrigenous organic-carbon input) and flux of IP25 (a highly-branched C25 isoprenoid, a new proxy for sea-ice coverage; cf., [2]) from the central Arctic Ocean are presented for a one-year period. The study was carried out on material obtained from a long-term mooring system equipped with two multi-sampling traps, at 150 and 1550 m depth, and deployed on the southern Lomonosov Ridge close to the Laptev Sea continental margin from September 1995 to August 1996 (see [3] and [4] for details). The biomarker data are interpreted in terms of seasonal variability of lateral organic-carbon input, primary production, and sea-ice coverage. Conference Object Arctic Arctic Ocean Greenland laptev Laptev Sea Lomonosov Ridge New Siberian Islands Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Lomonosov Ridge, crossing the Arctic Ocean from Greenland to the New Siberian Islands and separating the Eurasian and Amerasian basins, underlies an area with nearly permant ice cover. Satellite passive microwave ice concentration data show that the southern Lomonosov Ridge, close to the Eurasian continental margin, is generally covered by more than 95% ice during most of the season, and even during summer ice concentration remains above 90%. Sea-ice cover in the study area, however, shows a distinct interannual variability, and sometimes ice-free areas occur [1]. Because of the extensive sea-ice cover and light limitation, primary production is restricted to a period of about three months during summer.Data on biomarker composition and fluxes using long-term sediment traps are still very rare in the Northern High Latitudes and are restricted to the arctic marginal seas and sub-arctic regions. Here, data on the variability of biomarker composition (as proxy for marine and terrigenous organic-carbon input) and flux of IP25 (a highly-branched C25 isoprenoid, a new proxy for sea-ice coverage; cf., [2]) from the central Arctic Ocean are presented for a one-year period. The study was carried out on material obtained from a long-term mooring system equipped with two multi-sampling traps, at 150 and 1550 m depth, and deployed on the southern Lomonosov Ridge close to the Laptev Sea continental margin from September 1995 to August 1996 (see [3] and [4] for details). The biomarker data are interpreted in terms of seasonal variability of lateral organic-carbon input, primary production, and sea-ice coverage. |
format |
Conference Object |
author |
Fahl, Kirsten Luttmer, Walter |
spellingShingle |
Fahl, Kirsten Luttmer, Walter IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
author_facet |
Fahl, Kirsten Luttmer, Walter |
author_sort |
Fahl, Kirsten |
title |
IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
title_short |
IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
title_full |
IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
title_fullStr |
IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
title_full_unstemmed |
IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) |
title_sort |
ip25 as proxy for seasonal variability of sea-ice coverage on lomonosov ridge (central arctic ocean) |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/20886/ https://hdl.handle.net/10013/epic.33187 |
genre |
Arctic Arctic Ocean Greenland laptev Laptev Sea Lomonosov Ridge New Siberian Islands Sea ice |
genre_facet |
Arctic Arctic Ocean Greenland laptev Laptev Sea Lomonosov Ridge New Siberian Islands Sea ice |
op_source |
EPIC324th International Meeting on Organic Geochemistry, Bremen, Germany. September 2009. Abstract No. P439., 06 |
op_relation |
Fahl, K. orcid:0000-0001-9317-4656 and Luttmer, W. (2009) IP25 as proxy for seasonal variability of sea-ice coverage on Lomonosov Ridge (Central Arctic Ocean) , 24th International Meeting on Organic Geochemistry, Bremen, Germany. September 2009. Abstract No. P439. . hdl:10013/epic.33187 |
_version_ |
1810292827273297920 |