Warny, Sophie; Askin, R A; Hannah, Mike J; Mohr, Barbara A R; Raine, J Ian; Harwood, David M; Florindo, Fabio (2009): (Supplement) Concentration in palynomorphs per gram of dry sediment in ANDRILL core AND-2A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.858994, Supplement to: Warny, S et al. (2009): Palynomorphs from a sediment core reveal a sudden remarkably warm Antarctica during the middle Miocene. Geology, 37(10), 955-958, https://doi.org/10.1130/G30139A.1
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Abstract:
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.
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Latitude: -77.758141 * Longitude: 165.276765
Date/Time Start: 2007-10-10T12:00:00 * Date/Time End: 2007-11-30T12:00:00
Minimum DEPTH, sediment/rock: 229.16 m * Maximum DEPTH, sediment/rock: 618.49 m
Event(s):
AND-2A * Latitude: -77.758141 * Longitude: 165.276765 * Date/Time Start: 2007-10-10T12:00:00 * Date/Time End: 2007-11-30T12:00:00 * Elevation: -380.0 m * Recovery: 1138.54 m * Location: McMurdo Sound * Campaign: SMS (Southern McMurdo Sound) * Basis: McMurdo Station * Method/Device: Drilling/drill rig (DRILL) * Comment: Coring site is located ~25 km from the United States' McMurdo Station and from New Zealand's Scott Base on a 8.5 m thick floating sea-ice platform.
Comment:
Another version of this data can be found at http://www.geosociety.org/pubs/ft2009.htm with number 2009235.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Core | Core | Warny, Sophie | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Warny, Sophie | Geocode – top depth | |
| 3 | Palynomorpha | Palyn | Warny, Sophie | P= Pollen and spore, F= Freshwater algae, D= Dinoflagellate cyst | ||
| 4 | Nothofagidites spp. | Nothofagidites spp. | #/g | Warny, Sophie | fusca group (Fuscospora, Nothofagus subgenera) | |
| 5 | Podocarpidites sp. | Podocarpidites sp. | #/g | Warny, Sophie | ||
| 6 | Palynomorpha, terrestrial | Palyn ter | #/g | Warny, Sophie | Coptospora spp., Stereisporites spp., Belgisporis sp., Retitriletes sp. | |
| 7 | Palynomorpha, terrestrial | Palyn ter | #/g | Warny, Sophie | other Tundra taxa: Caryophyllaceae, Campanulaceae, Ericales, Stylidiaceae, Tricolpites sp. A, Sparganiaceae, Typhaceae | |
| 8 | Algae, freshwater | Algae fw | #/g | Warny, Sophie | ||
| 9 | Pyxidinopsis braboi | P. braboi | #/g | Warny, Sophie | ||
| 10 | Operculodinium centrocarpum | O. centrocarpum | #/g | Warny, Sophie |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
348 data points