noaa-cave-1003966 Avaiki Speleothem lamina thickness, PAGES Australasia 2k Version Rasbury, M. Avaiki Speleothem lamina thickness, PAGES Australasia 2k Version 2013-03-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/1003966 Investigator M. Rasbury earth science paleoclimate speleothems geoscientificInformation PAGES 2k Network PAGES Australasia 2k 1829 AD 2001 AD 121 cal yr BP -51 cal yr BP Complete -19 -19 -169.83 -169.83 Ocean Pacific Ocean South Pacific Ocean Polynesia Niue Avaiki Cave>LATITUDE -19>LONGITUDE -169.83 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 Rasbury, M.;Aharon, P.A. 2006. ENSO-controlled rainfall variability records archived in tropical stalagmites from the mid-ocean island of Niue, South Pacific. Geochem. Geophys. Geosyst. Vol. 7, Q07010

Niue Island is located in close proximity to the epicenter of the South Pacific Convergence Zone (SPCZ), and its rainfall variability is controlled by changes in the phase of the El Nino-Southern Oscillation (ENSO) phenomenon. Four actively growing stalagmites displaying couplets of light and dark calcite layers were sampled from a flank-margin cave on Niue Island in order to determine the dominant climate factor controlling lamina thickness and establish the usefulness of the stalagmites as archives of ENSO variability records. Couplets counting, AMS radiocarbon assays, and growth rates analysis (mean growth rate: 0.34 ą 0.04 mm/yr for n = 604) support the premise that these couplets are annually deposited and their stalagmites contain records of up to two centuries long. Comparison of band thickness records with instrumental records of air temperature and rainfall kept on the island since 1930 and 1906,respectively, suggests that rainfall variability is the dominant controlling factor. Coherency between the spectral power of the annual layers unraveling periodicities at 2.4 and 5.4 years and that of annual and monsoon rainfall at 2.4ŋ2.7 and 5.2 years corroborates the rainfall control on the band thickness variability of the Niuean stalagmites. Phase lags and amplitude discrepancies between rainfall and stalagmite records are attributed to the impact of torrential rains accompanying cyclones that occasionally struck the island. The excellent agreement between the periodicities prominent in the Niuean stalagmites and those typical of the ENSO phenomenon (2.4 and 4.3ŋ6.0 years) suggests the latter exerts a dominant control on the stalagmite growth rates via rainfall variability. Interdecadal periodicities at 10, 14, and 30 years contained in the Niuean stalagmites spectral power are tentatively attributed to ENSO phase changes driven by the Inter-Decadal Pacific Oscillation (IPO). The Niuean stalagmites, exhibiting relative fast growth rates and prominent layered sequences, hold promise to provide continuous century to millennium-long high resolution atmospheric records of ENSO history that will complement and expand the sea surface temperature records archived in tropical Pacific corals. STUDY NOTES: Uploaded by R. Neukom, data obtained from NOAA Paleo DB.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/australasia2k/Avaiki.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/pacific/avaiki2006.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11