(Supplement) Concentration in palynomorphs per gram of dry sediment in ANDRILL core AND-2A


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.

Another version of this data can be found at http://www.geosociety.org/pubs/ft2009.htm with number 2009235.

Supplement to: Warny, Sophie; Askin, R A; Hannah, Mike J; Mohr, Barbara A R; Raine, J Ian; Harwood, David M; Florindo, Fabio (2009): Palynomorphs from a sediment core reveal a sudden remarkably warm Antarctica during the middle Miocene. Geology, 37(10), 955-958

DOI https://doi.org/10.1594/PANGAEA.858994
Related Identifier https://doi.org/10.1130/G30139A.1
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.858994
Creator Warny, Sophie (ORCID: 0000-0002-3451-040X); Askin, R A; Hannah, Mike J; Mohr, Barbara A R; Raine, J Ian ; Harwood, David M; Florindo, Fabio
Publisher PANGAEA
Publication Year 2009
Funding Reference German Research Foundation https://doi.org/10.13039/501100001659 Crossref Funder ID 5472008 http://gepris.dfg.de/gepris/projekt/5472008 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 348 data points
Discipline Earth System Research
Spatial Coverage (165.277 LON, -77.758 LAT); McMurdo Sound
Temporal Coverage Begin 2007-10-10T12:00:00Z
Temporal Coverage End 2007-11-30T12:00:00Z