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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Copernicus Publications
2014
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Online Access: | https://doi.org/10.5194/cp-10-939-2014 http://www.clim-past.net/10/939/2014/cp-10-939-2014.pdf https://doaj.org/article/c1338c86649b42ee9a2ae2f0268aac23 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:c1338c86649b42ee9a2ae2f0268aac23 2023-05-15T16:27:48+02:00 Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments L. S. Shumilovskikh D. Fleitmann N. R. Nowaczyk H. Behling F. Marret A. Wegwerth H. W. Arz 2014-05-01 https://doi.org/10.5194/cp-10-939-2014 http://www.clim-past.net/10/939/2014/cp-10-939-2014.pdf https://doaj.org/article/c1338c86649b42ee9a2ae2f0268aac23 en eng Copernicus Publications 1814-9324 1814-9332 doi:10.5194/cp-10-939-2014 http://www.clim-past.net/10/939/2014/cp-10-939-2014.pdf https://doaj.org/article/c1338c86649b42ee9a2ae2f0268aac23 undefined Climate of the Past, Vol 10, Iss 3, Pp 939-954 (2014) anthro-bio envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.5194/cp-10-939-2014 2023-01-22T17:50:37Z 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 ~64–55 and 40–32 ka BP, and two major humid phases ~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 ~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 ~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. Heinrich events show a similar impact ... Article in Journal/Newspaper Greenland North Atlantic Unknown Greenland Climate of the Past 10 3 939 954 |
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fttriple |
language |
English |
topic |
anthro-bio envir |
spellingShingle |
anthro-bio envir L. S. Shumilovskikh D. Fleitmann N. R. Nowaczyk H. Behling F. Marret A. Wegwerth H. W. Arz Orbital- and millennial-scale environmental changes between 64 and 20 ka BP recorded in Black Sea sediments |
topic_facet |
anthro-bio envir |
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 ~64–55 and 40–32 ka BP, and two major humid phases ~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 ~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 ~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. Heinrich events show a similar impact ... |
format |
Article in Journal/Newspaper |
author |
L. S. Shumilovskikh D. Fleitmann N. R. Nowaczyk H. Behling F. Marret A. Wegwerth H. W. Arz |
author_facet |
L. S. Shumilovskikh D. Fleitmann N. R. Nowaczyk H. Behling F. Marret A. Wegwerth H. W. Arz |
author_sort |
L. S. Shumilovskikh |
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 |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-939-2014 http://www.clim-past.net/10/939/2014/cp-10-939-2014.pdf https://doaj.org/article/c1338c86649b42ee9a2ae2f0268aac23 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Climate of the Past, Vol 10, Iss 3, Pp 939-954 (2014) |
op_relation |
1814-9324 1814-9332 doi:10.5194/cp-10-939-2014 http://www.clim-past.net/10/939/2014/cp-10-939-2014.pdf https://doaj.org/article/c1338c86649b42ee9a2ae2f0268aac23 |
op_rights |
undefined |
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 |
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1766017309825040384 |