Southern Ocean Productivity Data Over the Past Million Years Jaccard, S.L.; Hayes, C.T.; Martínez-Garcia, A.; Hodell, D.A.; Anderson, R.F.; Sigman, D.M.; Haug, G.H. Jaccard, S.L. Hayes, C.T. Martínez-Garcia, A. Hodell, D.A. Anderson, R.F. Sigman, D.M. Haug, G.H. earth science/paleoclimate/paleoceanography (biogenic silica,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,mass accumulation rate) earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (calcium carbonate,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,mass accumulation rate) earth science/paleoclimate/paleoceanography (calcium/iron,sediment,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (barium/iron,sediment,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (barium,sediment,null,milligram per square centimeter per kiloyear,null,paleoceanography,null,null,N,biogenic barium; mass accumulation rate) earth science/paleoclimate/paleoceanography (230Th excess,sediment,null,disintegration per minute per gram,null,paleoceanography,corrected,null,N,corrected for detrital 230Th; ingrown 230Th and decay of excess 230Th) earth science/paleoclimate/paleoceanography (chlorine,sediment,null,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,mass accumulation rate) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP1094>LATITUDE -53.18035>LONGITUDE 5.130333) Export of organic carbon from surface waters of the Antarctic Zone of the Southern Ocean decreased during the last ice age, coinciding with declining atmospheric carbon dioxide (CO2) concentrations, signaling reduced exchange of CO2 between the ocean interior and the atmosphere. In contrast, in the Subantarctic Zone, export production increased into ice ages coinciding with rising dust fluxes, thus suggesting iron fertilization of subantarctic phytoplankton. Here, a new high-resolution productivity record from the Antarctic Zone is compiled with parallel subantarctic data over the past million years. Together, they fit the view that the combination of these two modes of Southern Ocean change determines the temporal structure of the glacial-interglacial atmospheric CO2 record, including during the interval of "lukewarm" interglacials between 450 and 800 thousand years ago. STUDY NOTES: The stratigraphy is based on planktonic foraminifera d18O correlation to the EPICA Dome C ice core age scale assuming an in-phase relationship. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Jaccard, S.L. Investigator : Hayes, C.T. Investigator : Martínez-Garcia, A. Investigator : Hodell, D.A. Investigator : Anderson, R.F. Investigator : Sigman, D.M. Investigator : Haug, G.H. 2013-05-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/14328 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-230Th-MAR.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-XRF.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-230Th-MAR.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-XRF.txt English https://www.ncdc.noaa.gov/paleo/study/14328 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-230Th-MAR.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jaccard2013/jaccard2013-XRF.txt Jaccard, S.L., Hayes, C.T., Martinez-Garcia, A., Hodell, D.A., Anderson, R.F., Sigman, D.M., Haug, G.H. 2013. Two modes of change in Southern Ocean ocean productivity over the past million years. Science, 339, 1419-1423. DOI:10.1126/science.1227545 START YEAR: 994991 cal yr BP * END YEAR: 1460 cal yr BP 5.130333 -53.18035 5.130333 -53.18035