noaa-ocean-22250 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. Plio-Pleistocene Alkenone concentration data from the Atlantic Ocean 2017-06-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22250 Investigator K.T. Lawrence Investigator D.M. Sigman Investigator T.D. Herbert Investigator C.A. Riihimaki Investigator C.T. Bolton Investigator A. Martínez-Garcia Investigator A. Rosell-Melé Investigator G.H. Haug 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 biomarkers earth science paleoclimate paleocean lithology geoscientificInformation 4002 cal yr ka BP 1 cal yr ka BP 4002000 cal yr BP 1000 cal yr BP Complete -42.908333 69.25 -32.950122 8.9 -3824 -1800 Ocean Atlantic Ocean South Atlantic Ocean ODP 662>LATITUDE -1.38>LONGITUDE -11.73 Ocean Atlantic Ocean North Atlantic Ocean DSDP 607>LATITUDE 41.000019>LONGITUDE -32.950122 Ocean Atlantic Ocean South Atlantic Ocean ODP 1090>LATITUDE -42.908333>LONGITUDE 8.9 Ocean Atlantic Ocean North Atlantic Ocean ODP 907>LATITUDE 69.25>LONGITUDE -12.7 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Lawrence, K.T., D.M. Sigman, T.D. Herbert, C.A. Riihimaki, C.T. Bolton, A. Martinez-Garcia, A. Rosell-Mele, and G.H. Haug 2013 Paleoceanography 28 740-751 10.1002/2013PA002546

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

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp662.txt NOAA Template File; ODP 662 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp1090.txt NOAA Template File; ODP 1090 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-odp907.txt NOAA Template File; ODP 907 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/lawrence2013-dsdp607.txt NOAA Template File; DSDP 607 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lawrence2013/Lawrenceetal_published_productivitydata_2013.xls Excel File; All Data used in study including previously published results USA/NOAA DIF Version 9.8.4 2019-05-06 2019-05-06