Antarctic Holocene Ice and Sediment Core Isotope, Chemical, and Diatom Data Mezgec, K.; Stenni, B.; Crosta, X.; Masson-Delmotte, V.; Baroni, C.; Braida, M.; Ciardini, V.; Colizza, E.; Melis, R.; Salvatore, M.C.; Severi, M.; Scarchilli, C.; Traversi, R.; Udisti, R.; Frezzotti, M. Mezgec, K. Stenni, B. Crosta, X. Masson-Delmotte, V. Baroni, C. Braida, M. Ciardini, V. Colizza, E. Melis, R. Salvatore, M.C. Severi, M. Scarchilli, C. Traversi, R. Udisti, R. Frezzotti, M. earth science/paleoclimate/ice cores (ice age,null,null,calendar year before present,null,ice cores,null,null,N,Dating Severi et al. 2012 CP) earth science/paleoclimate/ice cores (depth at sample end,null,null,meter,null,ice cores,null,null,N,top depth) earth science/paleoclimate/ice cores (sodium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,null) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,percent,null,paleoceanography,null,null,N,Chaetoceros Hyalochaete resting spores relative abundance) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil VSMOW,null,ice cores,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/ice cores (non-sea-salt calcium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,per mil VSMOW,null,ice cores,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/ice cores (deuterium excess,bulk ice,null,per mil VSMOW,null,ice cores,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,top depth) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,percent,null,paleoceanography,null,null,N,Fragilariopsis kerguelensis relative abundance) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,percent,null,paleoceanography,null,null,N,Thalassiosira antarctica resting spores relative abundance) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,percent,null,paleoceanography,null,null,N,Fragilariopsis curta group (F. curta and Fragilariopsis cylindrus) relative abundance) earth science/paleoclimate/paleoceanography (identified diatom,sediment,null,percent,null,paleoceanography,null,null,N,Fragilariopsis curta relative abundance) earth science/paleoclimate/ice cores (calcium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (sea-salt sodium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/paleocean (Talos Dome TALDICE>LATITUDE -72.8166>LONGITUDE 159.1833) (BAY05-43c>LATITUDE -74.1833>LONGITUDE 166.05) (BAY05-20c>LATITUDE -72.3>LONGITUDE 170.05) (ANTA99-cJ5>LATITUDE -73.8167>LONGITUDE 175.65) The causes of the recent increase in Antarctic sea ice extent, characterised by large regional contrasts and decadal variations, remain unclear. In the Ross Sea, where such a sea ice increase is reported, 50% of the sea ice is produced within wind-sustained latent-heat polynyas. Combining information from marine diatom records and sea salt sodium and water isotope ice core records, we here document contrasting patterns in sea ice variations between coastal and open sea areas in Western Ross Sea over the current interglacial period. Since about 3600 years before present, an increase in the efficiency of regional latent-heat polynyas resulted in more coastal sea ice, while sea ice extent decreased overall. These past changes coincide with remarkable optima or minima in the abundances of penguins, silverfish and seal remains, confirming the high sensitivity of marine ecosystems to environmental and especially coastal sea ice conditions. STUDY NOTES: Holocene water isotope (d18O and dD) and cation (Ca and Na) data from the TALDICE ice core, Antarctica, plus diatom abundance data from 3 Ross Sea marine sediment cores. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Mezgec, K. Investigator : Stenni, B. Investigator : Crosta, X. Investigator : Masson-Delmotte, V. Investigator : Baroni, C. Investigator : Braida, M. Investigator : Ciardini, V. Investigator : Colizza, E. Investigator : Melis, R. Investigator : Salvatore, M.C. Investigator : Severi, M. Investigator : Scarchilli, C. Investigator : Traversi, R. Investigator : Udisti, R. Investigator : Frezzotti, M. 2017-11-06 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22590 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017chem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-20cdiatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/anta99-cj5diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-43cdiatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017chem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-20cdiatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/anta99-cj5diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-43cdiatom.txt English https://www.ncdc.noaa.gov/paleo/study/22590 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017chem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/taldice2017iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-20cdiatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/anta99-cj5diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mezgec2017/bay05-43cdiatom.txt K. Mezgec, B. Stenni, X. Crosta, V. Masson-Delmotte, C. Baroni, M. Braida, V. Ciardini, E. Colizza, R. Melis, M. C. Salvatore, M. Severi, C. Scarchilli, R. Traversi, R. Udisti, M. Frezzotti2017Holocene sea ice variability driven by wind and polynya efficiency in the Ross SeaNature Communications1334810.1038/s41467-017-01455-xhttps://www.nature.com/articles/s41467-017-01455-x START YEAR: 12015 cal yr BP * END YEAR: -41 cal yr BP 159.1833 -74.1833 175.65 -72.3