Plio-Pleistocene Alkenone concentration data from the Atlantic Ocean Lawrence, K.T.; Sigman, D.M.; Herbert, T.D.; Riihimaki, C.A.; Bolton, C.T.; Martínez-Garcia, A.; Rosell-Melé, A.; Haug, G.H. Lawrence, K.T. Sigman, D.M. Herbert, T.D. Riihimaki, C.A. Bolton, C.T. Martínez-Garcia, A. Rosell-Melé, A. Haug, G.H. earth science/paleoclimate/paleoceanography (C37 alkenone,null,null,microgram per gram,null,paleoceanography,null,null,N,C37 alkenone concentration) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,site and hole information) 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 (C37 alkenone,null,null,nanomole per gram,null,paleoceanography,null,null,N,C37 alkenone concentration) earth science/paleoclimate/paleoceanography (biogenic silica,null,null,weight percent,null,paleoceanography,null,null,N,opal) earth science/paleoclimate/paleoceanography (biogenic silica,null,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,opal MAR) earth science/paleoclimate/paleoceanography (C37 alkenone,null,null,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,C37 alkenone mass accumulation rate) earth science/paleoclimate/paleoceanography (depth at sample start,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C37 alkenone,null,null,nanogram per gram,null,paleoceanography,null,null,N,C37 alkenone concentration) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,core section) earth science/paleoclimate/paleoceanography (depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 662>LATITUDE -1.38>LONGITUDE -11.73) (DSDP 607>LATITUDE 41.000019>LONGITUDE -32.950122) (ODP 1090>LATITUDE -42.908333>LONGITUDE 8.9) (ODP 907>LATITUDE 69.25>LONGITUDE -12.7) Marine biological export productivity declined in high-latitude regions in the North Pacific and Southern Ocean 2.7 million years ago, in parallel with the intensification of Northern Hemisphere glaciation. Here, we present data from the North Atlantic, which show a similar but time-transgressive pattern of high-latitude productivity decline from 3.3 to 2.5 Ma, with productivity decreasing first at 69°N, hundreds of thousands of years before it declined at 58°N. We propose that the cumulative data are best explained by an equatorward migration of the westerly winds, which caused a southward shift in the zone of Ekman divergence and upwelling-associated major nutrient supply over this time interval. We suggest that a similar equatorward migration of the westerly winds may also help explain the productivity changes observed in other high latitude regions, particularly the Southern Ocean. At 2.7 Ma, equatorial and temperate Atlantic sites began to show orbitally paced productivity pulses, consistent with a shoaling and meridional contraction of the nutrient-poor “warm sphere” that characterizes the low latitude upper ocean. This timing coincides with observed productivity changes in Southern Ocean, consistent with previous findings that the Southern Ocean exerts a strong influence on the fertility of the low latitude Atlantic. Finally, we propose that the unique basin geometry of the North Atlantic caused deep water formation in this region to remain relatively stable despite equatorward migration of winds and ocean fronts. STUDY NOTES: Plio-Pleistocene paleoproductivity reconstruction. Provided Keywords: paleoproductivity, alkenones, opal, North Atlantic, Pliocene, Pleistocene NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lawrence, K.T. Investigator : Sigman, D.M. Investigator : Herbert, T.D. Investigator : Riihimaki, C.A. Investigator : Bolton, C.T. Investigator : Martínez-Garcia, A. Investigator : Rosell-Melé, A. Investigator : Haug, G.H. 2017-06-16 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22250 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp662.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp1090.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp907.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-dsdp607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/Lawrenceetal_published_productivitydata_2013.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp662.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp1090.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp907.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-dsdp607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/Lawrenceetal_published_productivitydata_2013.xls English https://www.ncdc.noaa.gov/paleo/study/22250 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp662.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp1090.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp907.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-dsdp607.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/Lawrenceetal_published_productivitydata_2013.xls Lawrence, K.T., D.M. Sigman, T.D. Herbert, C.A. Riihimaki, C.T. Bolton, A. Martinez-Garcia, A. Rosell-Mele, and G.H. Haug2013Time-transgressive North Atlantic productivity changes upon Northern Hemisphere glaciationPaleoceanography28740-75110.1002/2013PA002546 START YEAR: 4002 cal yr ka BP * END YEAR: 1 cal yr ka BP -32.950122 -42.908333 8.9 69.25