noaa-ocean-16648 Deglacial North East Pacific Radiocarbon and Boron Isotope Data from MD02-2489 Rae, J.W.B.; Sarnthein, M.; Foster, G.L.; Ridgwell, A.; Grootes, P.M.; Elliott, T. Deglacial North East Pacific Radiocarbon and Boron Isotope Data from MD02-2489 2014-06-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16648 Investigator J.W.B. Rae Investigator M. Sarnthein Investigator G.L. Foster Investigator A. Ridgwell Investigator P.M. Grootes Investigator T. Elliott earth science paleoclimate paleoceanography age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,raw conventional 14C earth science paleoclimate paleoceanography age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,benthic foraminifer earth science paleoclimate paleoceanography age,null,one standard deviation,radiocarbon year before present,null,paleoceanography,null,null,N,benthic foraminifer earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,planktic foraminifer,null,radiocarbon year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Delta 14C,planktic foraminifer,null,per mil VPDB,null,paleoceanography,corrected,null,N,corrected for mass dependent isotope fractionation earth science paleoclimate paleoceanography age,null,null,radiocarbon year,null,paleoceanography,differenced,null,N,Difference between planktic foraminifera and the contemporaneous atmosphere units earth science paleoclimate paleoceanography age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,planktic foraminifer earth science paleoclimate paleoceanography Delta 14C,foraminifer,null,per mil VPDB,null,paleoceanography,corrected,null,N,corrected for mass dependent isotope fractionation earth science paleoclimate paleoceanography delta 11B,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,null,null,N,per mil NIST 951 earth science paleoclimate paleoceanography age,null,one standard deviation,radiocarbon year before present,null,paleoceanography,null,null,N,planktic foraminifer earth science paleoclimate paleoceanography age,null,null,radiocarbon year,null,paleoceanography,differenced,null,N,age difference benthic-planktonic foraminifera earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,one standard deviation,radiocarbon year before present,null,paleoceanography,null,null,N,raw conventional 14C earth science paleoclimate paleoceanography delta 11B,Cibicidoides wuellerstorfi,two standard deviations,per mil,null,paleoceanography,null,null,N,per mil NIST 951 earth science paleoclimate paleoceanography age,null,one standard deviation,radiocarbon year,null,paleoceanography,differenced,null,N,age difference benthic-planktonic foraminifera earth science paleoclimate paleoceanography Delta 14C,benthic foraminifer,null,per mil VPDB,null,paleoceanography,differenced,null,N,Difference between benthic foraminifera and the contemporaneous atmosphere units earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,plateau-tuned earth science paleoclimate paleoceanography Delta 14C,benthic foraminifer,null,per mil VPDB,null,paleoceanography,corrected,null,N,corrected for mass dependent isotope fractionation earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,using delta 18O ties earth science paleoclimate paleoceanography age,null,null,radiocarbon year,null,paleoceanography,differenced,null,N,difference between benthic foraminifera and the contemporaneous atmosphere units earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Delta 14C,foraminifer,one standard deviation,per mil VPDB,null,paleoceanography,corrected,null,N,corrected for mass dependent isotope fractionation earth science paleoclimate paleoceanography age,planktic foraminifer,one standard deviation,radiocarbon year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Delta 14C,planktic foraminifer,null,per mil VPDB,null,paleoceanography,differenced,null,N,Difference between planktic foraminifera and the contemporaneous atmosphere units earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean age control geoscientificInformation Dansgaard-Oeschger cycles 50000 cal yr BP -5 cal yr BP Complete 54.3655 54.39 -148.92 -148.4463 -3640 -3636 Ocean Pacific Ocean North Pacific Ocean MD02-2489>LATITUDE 54.39>LONGITUDE -148.92 Ocean Pacific Ocean North Pacific Ocean ODP 887>LATITUDE 54.3655>LONGITUDE -148.4463 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 Rae, J.W.B., M. Sarnthein, G.L. Foster, A. Ridgwell, P.M. Grootes, and T. Elliott 2014 Paleoceanography 10.1002/2013PA002570

Deep water formation in the North Atlantic and Southern Ocean is widely thought to influence deglacial CO2 rise and climate change; here we suggest that deep water formation in the North Pacific may also play an important role. We present paired radiocarbon and boron isotope data from foraminifera from sediment core MD02-2489 at 3640 m in the North East Pacific. These show a pronounced excursion during Heinrich Stadial 1, with benthic-planktic radiocarbon offsets dropping to ~350 years, accompanied by a decrease in benthic d11B. We suggest this is driven by the onset of deep convection in the North Pacific, which mixes young shallow waters to depth, old deep waters to the surface, and low-pH water from intermediate depths into the deep ocean. This deep water formation event was likely driven by an increase in surface salinity, due to subdued atmospheric/monsoonal freshwater flux during Heinrich Stadial 1. The ability of North Pacific Deep Water (NPDW) formation to ex plain the excursions seen in our data is demonstrated in a series of experiments with an intermediate complexity Earth system model. These experiments also show that breakdown of stratification in the North Pacific leads to a rapid ~30 ppm increase in atmospheric CO2, along with decreases in atmospheric d13C and d14C, consistent with observations of the early deglaciation. Our inference of deep water formation is based mainly on results from a single sediment core, and our boron isotope data are unavoidably sparse in the key HS1 interval, so this hypothesis merits further testing. However we note that there is independent support for breakdown of stratification in shallower waters during this period, including a minimum in d15N, younging in intermediate water 14C, and regional warming. We also re-evaluate deglacial changes in North Pacific productivity and carbonate preservation in light of our new data, and suggest that the regional pulse of export production observe d during the Bølling-Allerød is promoted by relatively stratified conditions, with increased light availability and a shallow, potent nutricline. Overall, our work highlights the potential of NPDW formation to play a significant and hitherto unrealized role in deglacial climate change and CO2 rise. STUDY NOTES: The data given here include age models, boron isotope data analysed by MC-ICPMS, and radiocarbon data analysed by AMS. Keywords from PI: Radiocarbon; Boron isotopes; North Pacific; Deglacial CO2; Deep water formation;

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t6.txt Formatted Text File; Table 6: Benthic 14C Data for MD02-2489 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t7.txt Formatted Text File; Table 7: Planktic 14C Data for MD02-2489 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t4.txt Formatted Text File; Table 4: Atmospheric 14C Record GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t5.txt Formatted Text File; Table 5: Benthic d11B Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t3.txt Formatted Text File; Table 3: Age Control Pts Used in Updated ODP887 Age Model GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-fulldata.xls Originally Contributed Excel File; All Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t1.txt Formatted Text File; Table 1: Age Control Pts in MD02-2489 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/rae2014/rae2014-t2.txt Formatted Text File; Table 2: Age Control Pts Used in Plateau-tuned Age Model MD02-2489 USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11