noaa-ocean-14791 Northwest Pacific Productivity Data During the Last Deglaciation Lam, P.J.; Robinson, L.F.; Blusztajn, J.; Li, C.; Cook, M.S.; McManus, J.F.; Keigwin, L.D. Northwest Pacific Productivity Data During the Last Deglaciation 2013-08-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/14791 Investigator P.J. Lam Investigator L.F. Robinson Investigator J. Blusztajn Investigator C. Li Investigator M.S. Cook Investigator J.F. McManus Investigator L.D. Keigwin earth science paleoclimate paleoceanography biogenic silica,sediment,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,archive half of GGC37 earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 232Th,sediment,null,parts per million,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 230Th,sediment,two standard deviations,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography biogenic silica,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,opal accumulation earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography volcanic material,sediment,null,count per gram,null,paleoceanography,null,null,N,volcanic ash earth science paleoclimate paleoceanography 238U,sediment,null,parts per million,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography uranium,sediment,two standard deviations,parts per million,null,paleoceanography,null,null,N,authigenic earth science paleoclimate paleoceanography 232Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,detrital sediment earth science paleoclimate paleoceanography calcium carbonate,sediment,two standard deviations,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,calcium carbonate accumulation earth science paleoclimate paleoceanography neodymium,sediment,null,parts per million,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography epsilon neodymium,sediment,null,epsilon unit,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography volcanic material,sediment,two standard deviations,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,volcanic material accumulation earth science paleoclimate paleoceanography dust,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,working half of GGC37 earth science paleoclimate paleoceanography biogenic silica,sediment,two standard deviations,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,opal accumulation earth science paleoclimate paleoceanography carbonate,sediment,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography ice rafted debris,null,null,count per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 230Th excess,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa/230Th excess,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography accumulation rate,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 232Th,sediment,null,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,232Th flux earth science paleoclimate paleoceanography mineral matter,sediment,null,percent,null,paleoceanography,null,null,N,residual mineral matter earth science paleoclimate paleoceanography mineral matter,null,two standard deviations,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,residual mineral matter accumulation earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 230Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 230Th excess,sediment,two standard deviations,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography calcium carbonate,sediment,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography dust,sediment,two standard deviations,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron,sediment,two standard deviations,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,soluble iron accumulation earth science paleoclimate paleoceanography 231Pa,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa,sediment,two standard deviations,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa/230Th excess,sediment,two standard deviations,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 232Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,232Th detrital accumulation earth science paleoclimate paleoceanography identified foraminifer,sediment,null,count per gram,null,paleoceanography,null,null,N,Uvigerina auberiana earth science paleoclimate paleoceanography mineral matter,null,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,residual mineral matter accumulation earth science paleoclimate paleoceanography iron,sediment,null,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,soluble iron accumulation earth science paleoclimate paleoceanography 87Sr/86Sr,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography epsilon neodymium,volcanic material,null,epsilon unit,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 87Sr/86Sr,volcanic material,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography volcanic material,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,volcanic material accumulation earth science paleoclimate paleoceanography uranium,sediment,null,parts per million,null,paleoceanography,null,null,N,authigenic earth science paleoclimate paleoceanography 232Th,sediment,two standard deviations,parts per million,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 238U,sediment,two standard deviations,parts per million,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa excess,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa excess,sediment,two standard deviations,disintegration per minute per gram,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,calcium carbonate accumulation earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean lithology earth science paleoclimate paleocean radiogenic isotope geoscientificInformation 23502 cal yr BP 2849 cal yr BP Complete 50.42 53 164.65 167.731667 -3300 -2980 Ocean Pacific Ocean North Pacific Ocean V19-4 GGC37>LATITUDE 50.42>LONGITUDE 167.731667 Ocean Pacific Ocean North Pacific Ocean RAMA 44PC>LATITUDE 53>LONGITUDE 164.65 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

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Boulder CO 80305-3328 USA online ASCII Lam, P.J., L.F. Robinson, J. Blusztajn, C. Li, M.S. Cook, J.F. McManus and L.D. Keigwin. 2013. Transient stratification as the cause of the North Pacific productivity spike during deglaciation. Nature Geoscience, 6, 622-626. DOI: 10.1038/ngeo1873

During the Bølling–Allerød warm period of the last deglaciation, about 14 kyr ago, there was a strong and pervasive spike in primary productivity in the North Pacific Ocean1. It has been suggested that this productivity event was caused by an influx of the micronutrient iron from surrounding continental shelves as they were flooded by sea-level rise2. Here we test this hypothesis by comparing numerous proxies of productivity with iron flux and provenance measured from a core from the subarctic Pacific Ocean. We find no evidence for an abrupt deglacial pulse of iron from any source at the time of peak productivity. Instead, we argue that the deglacial productivity peak was caused by two stepwise events. First, deep convection during early deglaciation increased nutrient supply to the surface but also increased the depth of the mixed layer, which pushed surface production deeper in the water column and induced light limitation. A subsequent input of meltwater from northern American ice sheets then stratified the water column, which relieved light limitation while leaving the surface waters enriched in nutrients. We conclude that iron plays, at most, a secondary role in controlling productivity during the glacial and deglacial periods in the subarctic Pacific Ocean.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lam2013/lam2013-ggc37-foram.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lam2013/lam2013-ggc37-sed.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lam2013/lam2013-44pc.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11