Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2009
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.858994 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867169111212032000 |
|---|---|
| author | Warny, Sophie Askin, R A Hannah, Mike J Mohr, Barbara A R Raine, J Ian Harwood, David M Florindo, Fabio |
| author_facet | Warny, Sophie Askin, R A Hannah, Mike J Mohr, Barbara A R Raine, J Ian Harwood, David M Florindo, Fabio |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | An exceptional triple palynological signal (unusually high abundance of marine, freshwater, and terrestrial palynomorphs) recovered from a core collected during the 2007 ANDRILL (Antarctic geologic drilling program) campaign in the Ross Sea, Antarctica, provides constraints for the Middle Miocene Climatic Optimum. Compared to elsewhere in the core, this signal comprises a 2000-fold increase in two species of dinoflagellate cysts, a synchronous five-fold increase in freshwater algae, and up to an 80-fold increase in terrestrial pollen, including a proliferation of woody plants. Together, these shifts in the palynological assemblages ca. 15.7 Ma ago represent a relatively short period of time during which Antarctica became abruptly much warmer. Land temperatures reached 10 °C (January mean), estimated annual sea-surface temperatures ranged from 0 to 11.5 °C, and increased freshwater input lowered the salinity during a short period of sea-ice reduction. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_858994 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Supplement) Concentration in palynomorphs per gram of dry sediment in ANDRILL core AND-2A Warny, Sophie Askin, R A Hannah, Mike J Mohr, Barbara A R Raine, J Ian Harwood, David M Florindo, Fabio Algae, freshwater; AND-2A; Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; McMurdo Sound; McMurdo Station; Nothofagidites spp.; Operculodinium centrocarpum; Palynomorpha; Palynomorpha, terrestrial; Podocarpidites sp.; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Pyxidinopsis braboi; SMS__Campaign; Southern McMurdo Sound; SPP1158 An exceptional triple palynological signal (unusually high abundance of marine, freshwater, and terrestrial palynomorphs) recovered from a core collected during the 2007 ANDRILL (Antarctic geologic drilling program) campaign in the Ross Sea, Antarctica, provides constraints for the Middle Miocene Climatic Optimum. Compared to elsewhere in the core, this signal comprises a 2000-fold increase in two species of dinoflagellate cysts, a synchronous five-fold increase in freshwater algae, and up to an 80-fold increase in terrestrial pollen, including a proliferation of woody plants. Together, these shifts in the palynological assemblages ca. 15.7 Ma ago represent a relatively short period of time during which Antarctica became abruptly much warmer. Land temperatures reached 10 °C (January mean), estimated annual sea-surface temperatures ranged from 0 to 11.5 °C, and increased freshwater input lowered the salinity during a short period of sea-ice reduction. |
| title | (Supplement) Concentration in palynomorphs per gram of dry sediment in ANDRILL core AND-2A |
| topic | Algae, freshwater; AND-2A; Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; McMurdo Sound; McMurdo Station; Nothofagidites spp.; Operculodinium centrocarpum; Palynomorpha; Palynomorpha, terrestrial; Podocarpidites sp.; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Pyxidinopsis braboi; SMS__Campaign; Southern McMurdo Sound; SPP1158 |
| url | https://doi.org/10.1594/PANGAEA.858994 |