Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments
High-resolution pollen and dinoflagellate cyst records from sediment core M72/5-25-GC1 were used to reconstruct vegetation dynamics in northern Anatolia and surface conditions of the Black Sea between 64 and 20 ka BP. During this period, the dominance of Artemisia in the pollen record indicates a st...
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Online Access: | https://resolver.sub.uni-goettingen.de/purl?gro-2/34767 https://resolver.sub.uni-goettingen.de/purl?gs-1/10124 https://doi.org/10.5194/cp-10-939-2014 |
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ftsubgoettingen:oai:publications.goettingen-research-online.de:2/34767 2023-09-05T13:19:50+02:00 Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments Shumilovskikh, Lyudmila S. Fleitmann, Dominik Nowaczyk, N. R. Behling, Hermann Marret, Fabienne Wegwerth, Antje Arz, Helge W. 2014 https://resolver.sub.uni-goettingen.de/purl?gro-2/34767 https://resolver.sub.uni-goettingen.de/purl?gs-1/10124 https://doi.org/10.5194/cp-10-939-2014 unknown 1814-9332 1814-9324 https://resolver.sub.uni-goettingen.de/purl?gro-2/34767 doi:10.5194/cp-10-939-2014 000338761600002 https://resolver.sub.uni-goettingen.de/purl?gs-1/10124 CC BY 3.0 https://creativecommons.org/licenses/by/3.0 journal_article original_ja published yes published_version 2014 ftsubgoettingen https://doi.org/10.5194/cp-10-939-2014 2023-08-20T22:13:16Z High-resolution pollen and dinoflagellate cyst records from sediment core M72/5-25-GC1 were used to reconstruct vegetation dynamics in northern Anatolia and surface conditions of the Black Sea between 64 and 20 ka BP. During this period, the dominance of Artemisia in the pollen record indicates a steppe landscape and arid climate conditions. However, the concomitant presence of temperate arboreal pollen suggests the existence of glacial refugia in northern Anatolia. Long-term glacial vegetation dynamics reveal two major arid phases similar to 64-55 and 40-32 ka BP, and two major humid phases similar to 54-45 and 28-20 ka BP, correlating with higher and lower summer insolation, respectively. Dansgaard-Oeschger (D-O) cycles are clearly indicated by the 25-GC1 pollen record. Greenland interstadials are characterized by a marked increase in temperate tree pollen, indicating a spread of forests due to warm/wet conditions in northern Anatolia, whereas Greenland stadials reveal cold and arid conditions as indicated by spread of xerophytic biomes. There is evidence for a phase lag of similar to 500 to 1500 yr between initial warming and forest expansion, possibly due to successive changes in atmospheric circulation in the North Atlantic sector. The dominance of Pyxidinopsis psilata and Spiniferites cruciformis in the dinocyst record indicates brackish Black Sea conditions during the entire glacial period. The decrease of marine indicators (marine dinocysts, acritarchs) at similar to 54 ka BP and increase of freshwater algae (Pediastrum, Botryococcus) from 32 to 25 ka BP reveals freshening of the Black Sea surface water. This freshening is possibly related to humid phases in the region, to connection between Caspian Sea and Black Sea, to seasonal freshening by floating ice, and/or to closer position of river mouths due to low sea level. In the southern Black Sea, Greenland interstadials are clearly indicated by high dinocyst concentrations and calcium carbonate content, as a result of an increase in primary productivity. ... Article in Journal/Newspaper Greenland North Atlantic Georg-August-Universität Göttingen: GoeScholar Greenland Climate of the Past 10 3 939 954 |
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Open Polar |
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Georg-August-Universität Göttingen: GoeScholar |
op_collection_id |
ftsubgoettingen |
language |
unknown |
description |
High-resolution pollen and dinoflagellate cyst records from sediment core M72/5-25-GC1 were used to reconstruct vegetation dynamics in northern Anatolia and surface conditions of the Black Sea between 64 and 20 ka BP. During this period, the dominance of Artemisia in the pollen record indicates a steppe landscape and arid climate conditions. However, the concomitant presence of temperate arboreal pollen suggests the existence of glacial refugia in northern Anatolia. Long-term glacial vegetation dynamics reveal two major arid phases similar to 64-55 and 40-32 ka BP, and two major humid phases similar to 54-45 and 28-20 ka BP, correlating with higher and lower summer insolation, respectively. Dansgaard-Oeschger (D-O) cycles are clearly indicated by the 25-GC1 pollen record. Greenland interstadials are characterized by a marked increase in temperate tree pollen, indicating a spread of forests due to warm/wet conditions in northern Anatolia, whereas Greenland stadials reveal cold and arid conditions as indicated by spread of xerophytic biomes. There is evidence for a phase lag of similar to 500 to 1500 yr between initial warming and forest expansion, possibly due to successive changes in atmospheric circulation in the North Atlantic sector. The dominance of Pyxidinopsis psilata and Spiniferites cruciformis in the dinocyst record indicates brackish Black Sea conditions during the entire glacial period. The decrease of marine indicators (marine dinocysts, acritarchs) at similar to 54 ka BP and increase of freshwater algae (Pediastrum, Botryococcus) from 32 to 25 ka BP reveals freshening of the Black Sea surface water. This freshening is possibly related to humid phases in the region, to connection between Caspian Sea and Black Sea, to seasonal freshening by floating ice, and/or to closer position of river mouths due to low sea level. In the southern Black Sea, Greenland interstadials are clearly indicated by high dinocyst concentrations and calcium carbonate content, as a result of an increase in primary productivity. ... |
format |
Article in Journal/Newspaper |
author |
Shumilovskikh, Lyudmila S. Fleitmann, Dominik Nowaczyk, N. R. Behling, Hermann Marret, Fabienne Wegwerth, Antje Arz, Helge W. |
spellingShingle |
Shumilovskikh, Lyudmila S. Fleitmann, Dominik Nowaczyk, N. R. Behling, Hermann Marret, Fabienne Wegwerth, Antje Arz, Helge W. Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
author_facet |
Shumilovskikh, Lyudmila S. Fleitmann, Dominik Nowaczyk, N. R. Behling, Hermann Marret, Fabienne Wegwerth, Antje Arz, Helge W. |
author_sort |
Shumilovskikh, Lyudmila S. |
title |
Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
title_short |
Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
title_full |
Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
title_fullStr |
Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
title_full_unstemmed |
Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
title_sort |
orbital- and millennial-scale environmental changes between 64 and 20 ka bp recorded in black sea sediments |
publishDate |
2014 |
url |
https://resolver.sub.uni-goettingen.de/purl?gro-2/34767 https://resolver.sub.uni-goettingen.de/purl?gs-1/10124 https://doi.org/10.5194/cp-10-939-2014 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
1814-9332 1814-9324 https://resolver.sub.uni-goettingen.de/purl?gro-2/34767 doi:10.5194/cp-10-939-2014 000338761600002 https://resolver.sub.uni-goettingen.de/purl?gs-1/10124 |
op_rights |
CC BY 3.0 https://creativecommons.org/licenses/by/3.0 |
op_doi |
https://doi.org/10.5194/cp-10-939-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
3 |
container_start_page |
939 |
op_container_end_page |
954 |
_version_ |
1776200637793435648 |