noaa-ocean-22392 Arabian Sea Organic Carbon, Biomarker and XRF-Br data covering the last 50 ka Orsi, W.D.; Coolen, M.J.L.; Wuchter, C.; He, L.; More, K.D.; Irigoien, X.; Chust, G.; Johnson, C.; Hemingway, J.D.; Lee, M.; Galy, V.V.; Giosan, L. Arabian Sea Organic Carbon, Biomarker and XRF-Br data covering the last 50 ka 2017-07-15 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22392 Investigator W.D. Orsi Investigator M.J.L. Coolen Investigator C. Wuchter Investigator L. He Investigator K.D. More Investigator X. Irigoien Investigator G. Chust Investigator C. Johnson Investigator J.D. Hemingway Investigator M. Lee Investigator V.V. Galy Investigator L. Giosan earth science paleoclimate paleoceanography organic carbon,sediment,one standard error,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,null,one standard error,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography nitrogen,sediment,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography bromine,null,null,count per second,null,paleoceanography,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography C37:2 alkenone,null,null,microgram per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography alkenone,null,null,microgram per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography nitrogen,sediment,one standard error,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 15N,null,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography C37:3 alkenone,null,null,microgram per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography organic carbon,sediment,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,null,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 15N,null,one standard error,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean nitrogen isotopes earth science paleoclimate paleocean age control geoscientificInformation 52900 cal yr BP 330 cal yr BP Complete 23.121667 23.121667 66.496667 66.496667 -566 -566 Ocean Indian Ocean Arabian Sea 64PE300–11>LATITUDE 23.121667>LONGITUDE 66.496667 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 Orsi, W.D.; Coolen, M.J.L; Wuchter, C.; He, L.; More, K.D.; Irigoien, X.; Chust, G.; Johnson, C.; Hemingway, J.D.; Lee, M.; Galy, V.; Giosan, L. 2017 Scientific Reports 7 10.1038/s41598-017-05590-9

Selection of microorganisms in marine sediment is shaped by energy-yielding electron acceptors for respiration that are depleted in vertical succession. However, some taxa have been reported to reflect past depositional conditions suggesting they have experienced weak selection after burial. In sediments underlying the Arabian Sea oxygen minimum zone (OMZ), we performed the first metagenomic profiling of sedimentary DNA at centennial-scale resolution in the context of a multi-proxy paleoclimate reconstruction. While vertical distributions of sulfate reducing bacteria and methanogens indicate energy-based selection typical of anoxic marine sediments, 5-15% of taxa per sample exhibit depthindependent stratigraphies indicative of paleoenvironmental selection over relatively short geological timescales. Despite being vertically separated, indicator taxa deposited under OMZ conditions were more similar to one another than those deposited in bioturbated intervals under intervening higher oxygen. The genomic potential for denitrification also correlated with palaeo-OMZ proxies, independent of sediment depth and available nitrate and nitrite. However, metagenomes revealed mixed acid and Entner-Dourdoroff fermentation pathways encoded by many of the same denitrifier groups. Fermentation thus may explain the subsistence of these facultatively anaerobic microbes whose stratigraphy follows changing paleoceanographic conditions. At least for certain taxa, our analysis provides evidence of their paleoenvironmental selection over the last glacial-interglacial cycle. STUDY NOTES: This study contains the biomarker record for core 11C with corresponding depth and age of samples measured Provided Keywords: oxygen minimum zone, alkenone, sea surface temperature

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/orsi2017/orsi2017-oc.txt NOAA Template File; Organic Carbon, d15N and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/orsi2017/orsi2017-bio.txt NOAA Template File; Biomarker Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/orsi2017/orsi2017-br.txt NOAA Template File; XRF-Br Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11