| _version_ | 1867167662033862656 |
|---|---|
| author | Sarnthein, Michael van Kreveld, Shirley A Erlenkeuser, Helmut Grootes, Pieter Meiert Kucera, Michal Pflaumann, Uwe Schulz, Michael |
| author_facet | Sarnthein, Michael van Kreveld, Shirley A Erlenkeuser, Helmut Grootes, Pieter Meiert Kucera, Michal Pflaumann, Uwe Schulz, Michael |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | At the western continental margin of the Barents Sea, 75°N, hemipelagic sediments provide a record of Holocene climate change with a time resolution of 10-70 years. Planktic foraminifera counts reveal a very early Holocene thermal optimum 10.7-7.7 kyr BP, with summer sea surface temperatures (SST) of 8°C and a much enhanced West Spitsbergen Current. There was a short cooling between 8.8 and 8.2 kyr BP. In the middle and late Holocene summer, SST dropped to 2.5°-5.0°C, indicative of reduced Atlantic heat advection, except for two short warmings near 2.2 and 1.6 kyr BP. Distinct quasi-periodic spikes of coarse sediment fraction (with large portions of lithic grains, benthic and planktic foraminifera) record cascades of cold, dense winter water down the continental slope as a result of enhanced seasonal sea ice formation and storminess on the Barents shelf over the entire Holocene. The spikes primarily cluster near recurrence intervals of 400-650 and 1000-1350 years, when traced over the entire Holocene, but follow significant 885-/840- and 505-/605-year periodicities in the early Holocene. These non-stationary periodicities mimic the Greenland-[Formula: See Text]Be variability, which is a tracer of solar forcing. Further significant Holocene periodicities of 230, (145) and 93 years come close to the deVries and Gleissberg solar cycles. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_727691 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sedimentology and geochemistry of core GIK23258-2 in the Barents Sea Sarnthein, Michael van Kreveld, Shirley A Erlenkeuser, Helmut Grootes, Pieter Meiert Kucera, Michal Pflaumann, Uwe Schulz, Michael Arctic Ocean; Giant box corer; GIK/IfG; GIK23258-2; GIK23258-3; GKG; Institute for Geosciences, Christian Albrechts University, Kiel; KAL; Kasten corer; M7/2; Meteor (1986) At the western continental margin of the Barents Sea, 75°N, hemipelagic sediments provide a record of Holocene climate change with a time resolution of 10-70 years. Planktic foraminifera counts reveal a very early Holocene thermal optimum 10.7-7.7 kyr BP, with summer sea surface temperatures (SST) of 8°C and a much enhanced West Spitsbergen Current. There was a short cooling between 8.8 and 8.2 kyr BP. In the middle and late Holocene summer, SST dropped to 2.5°-5.0°C, indicative of reduced Atlantic heat advection, except for two short warmings near 2.2 and 1.6 kyr BP. Distinct quasi-periodic spikes of coarse sediment fraction (with large portions of lithic grains, benthic and planktic foraminifera) record cascades of cold, dense winter water down the continental slope as a result of enhanced seasonal sea ice formation and storminess on the Barents shelf over the entire Holocene. The spikes primarily cluster near recurrence intervals of 400-650 and 1000-1350 years, when traced over the entire Holocene, but follow significant 885-/840- and 505-/605-year periodicities in the early Holocene. These non-stationary periodicities mimic the Greenland-[Formula: See Text]Be variability, which is a tracer of solar forcing. Further significant Holocene periodicities of 230, (145) and 93 years come close to the deVries and Gleissberg solar cycles. |
| title | Sedimentology and geochemistry of core GIK23258-2 in the Barents Sea |
| topic | Arctic Ocean; Giant box corer; GIK/IfG; GIK23258-2; GIK23258-3; GKG; Institute for Geosciences, Christian Albrechts University, Kiel; KAL; Kasten corer; M7/2; Meteor (1986) |
| url | https://doi.org/10.1594/PANGAEA.727691 |