Identification of frequent La Niña events during the early 1800s in the east equatorial Pacific

noaa-coral-18255 Seasonal Galapagos coral D14C, d18O and d13C values from 1602-1835 AD Druffel, E.R.M.; Griffin, S.M.; Vetter, D.; Dunbar, R.B.; Mucciarone, D.M. Seasonal Galapagos coral D14C, d18O and d13C values from 1602-1835 AD 2015-03-17 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18255 Investigator E.R.M. Druffel Investigator S.M. Griffin Investigator D. Vetter Investigator R.B. Dunbar Investigator D.M. Mucciarone earth science paleoclimate corals and sclerosponges Delta 14C,Pavona clavus,null,per mil NBS oxalic acid,null,corals and sclerosponges,corrected,accelerator mass spectrometry,N,corrected for known age to 1950 AD (Stuiver and Polack 1977) earth science paleoclimate corals and sclerosponges delta 18O,Pavona clavus,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate corals and sclerosponges delta 13C,Pavona clavus,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate corals and sclerosponges age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null earth science paleoclimate corals and sclerosponges Delta 14C,Pavona clavus,null,per mil NBS oxalic acid,null,corals and sclerosponges,corrected,accelerator mass spectrometry,N,warm season; corrected for known age to 1950 AD (Stuiver and Polack 1977) earth science paleoclimate corals and sclerosponges Delta 14C,Pavona clavus,null,per mil NBS oxalic acid,null,corals and sclerosponges,corrected,accelerator mass spectrometry,N,cool season; corrected for known age to 1950 AD (Stuiver and Polack 1977) earth science paleoclimate corals and sclerosponges delta 18O,Pavona clavus,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,cool season earth science paleoclimate corals and sclerosponges delta 18O,Pavona clavus,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,warm season earth science paleoclimate corals and sclerosponges oxygen isotopes earth science paleoclimate corals and sclerosponges carbon isotopes geoscientificInformation 1602 AD 1835 AD 348 cal yr BP 115 cal yr BP Complete -.25 -.25 -91.367 -91.367 Ocean Pacific Ocean Eastern Pacific Ocean Galapagos Islands Urvina Bay>LATITUDE -.25>LONGITUDE -91.367 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 Druffel, E.R.M., S. Griffin, D. Vetter, R.B. Dunbar, and D.M. Mucciarone 2015 Identification of frequent La Niña events during the early 1800s in the east equatorial Pacific Geophysical Research Letters 42 10.1002/2014GL062997

We report measurements of near monthly D14C and d18O during selected decades from an east equatorial Pacific coral that grew during the past four centuries. We find that El Niño events occurred regularly during the late 1700s. During the early 1800s, El Niño events occurred less often, and La Niña conditions prevailed, which were accompanied by unprecedented, low cool season D14C values and high cool season d18O values. These results indicate that shallow overturning water (e.g., Central Mode Water) from the North Pacific was likely an important source of water to the Galapagos area during the early 1800s. STUDY NOTES: Near-monthly measurements of D14C, d18O and d13C in the UR-18 coral collected from Urvina Bay in 1986. Precision on National Institute of Standards and Technology Standard Reference Materials 8544 and internal laboratory standards is better than 0.06‰ and 0.03‰ for d18O and d13C, respectively. Total uncertainty of D14C measurements was ±1.4‰.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2015/druffel2015.txt Formatted Text File; Urvina Bay Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11