noaa-coral-16317 Antongil Bay, Madagascar 300 Year Coral Luminescence Data Grove, C.A.; Zinke, J.; Peeters, F.J.C.; Park, W.; Scheufen, T.; Kasper, S.; Randriamanantsoa, B.; McCulloch, M.T.; Brummer, G.J.A. Antongil Bay, Madagascar 300 Year Coral Luminescence Data 2014-04-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16317 Investigator C.A. Grove Investigator J. Zinke Investigator F.J.C. Peeters Investigator W. Park Investigator T. Scheufen Investigator S. Kasper Investigator B. Randriamanantsoa Investigator M.T. McCulloch Investigator G.J.A. Brummer earth science paleoclimate corals and sclerosponges barium/calcium,Porites sp.,null,micromole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry|laser ablation,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 manganese/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry|laser ablation,N,null earth science paleoclimate corals and sclerosponges luminescence,Porites sp.,null,dimensionless,null,corals and sclerosponges,interpolated,luminescence spectroscopy,N,spectral green/blue luminescence earth science paleoclimate corals and sclerosponges physical properties earth science paleoclimate corals and sclerosponges trace metals geoscientificInformation hydrology 1708 AD 2008 AD 242 cal yr BP -58 cal yr BP Complete -15.866133 -15.5094 49.757283 50.312167 -4 -4 Ocean Indian Ocean Madagascar Antongil Bay IFAHO>LATITUDE -15.866133>LONGITUDE 50.312167 Ocean Indian Ocean Madagascar Antongil Bay ANDRA>LATITUDE -15.686167>LONGITUDE 49.956983 Ocean Indian Ocean Madagascar Antongil Bay MASB>LATITUDE -15.5094>LONGITUDE 49.7573 Ocean Indian Ocean Madagascar Antongil Bay MAS1>LATITUDE -15.509433>LONGITUDE 49.757283 Ocean Indian Ocean Madagascar Antongil Bay MAS3>LATITUDE -15.509633>LONGITUDE 49.7576 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 C.A. Grove, J. Zinke, F. Peeters, W. Park, T. Scheufen, S. Kasper, B. Randriamanantsoa, M.T. McCulloch, and G.-J.A. Brummer 2013 Climate of the Past 9 2 641-656 10.5194/cp-9-641-2013 http://www.clim-past.net/9/641/2013/cp-9-641-2013.html C.A. Grove, J. Zinke, T. Scheufen, J. Maina, E. Epping, W. Boer, B. Randriamanantsoa, and G.-J.A. Brummer 2012 Biogeosciences 9 8 3063-3081 10.5194/bg-9-3063-2012 http://www.biogeosciences.net/9/3063/2012/bg-9-3063-2012.html C.A. Grove, R. Nagtegaal, J. Zinke, T. Scheufen, B. Koster, S. Kasper, M.T. McCulloch, G. Bergh, G. Jan A. Brummer 2010 Coral Reefs 29 3 579-591 10.1007/s00338-010-0629-y http://link.springer.com/article/10.1007%2Fs00338-010-0629-y

Pacific Ocean sea surface temperatures (SST) influence rainfall variability on multidecadal and interdecadal timescales in concert with the Pacific Decadal Oscillation (PDO) and Interdecadal Pacific Oscillation (IPO). Rainfall variations in locations such as Australia and North America are therefore linked to phase changes in the PDO. Furthermore, studies have suggested teleconnections exist between the western Indian Ocean and Pacific Decadal Variability (PDV), similar to those observed on interannual timescales related to the El Niño Southern Oscillation (ENSO). However, as instrumental records of rainfall are too short and sparse to confidently assess multidecadal climatic teleconnections, here we present four coral climate archives from Madagascar spanning up to the past 300 yr (1708-2008) to assess such decadal variability. Using spectral luminescence scanning to reconstruct past changes in river runoff, we identify significant multidecadal and interdecadal frequencies in the coral records, which before 1900 are coherent with Asian-based PDO reconstructions. This multidecadal relationship with the Asian-based PDO reconstructions points to an unidentified teleconnection mechanism that affects Madagascar rainfall/runoff, most likely triggered by multidecadal changes in North Pacific SST, influencing the Asian Monsoon circulation. In the 20th century we decouple human deforestation effects from rainfall-induced soil erosion by pairing luminescence with coral geochemistry. Positive PDO phases are associated with increased Indian Ocean temperatures and runoff/rainfall in eastern Madagascar, while precipitation in southern Africa and eastern Australia declines. Consequently, the negative PDO phase that started in 1998 may contribute to reduced rainfall over eastern Madagascar and increased precipitation in southern Africa and eastern Australia. We conclude that multidecadal rainfall variability in Madagascar and the western Indian Ocean needs to be taken into account when considering water resource management under a future warming climate. STUDY NOTES: Spectral luminescence ratio, Ba/Ca, and Mn/Ca time series of Porites sp. corals from Antongil Bay, NE Madagascar, at monthly resolution. Three live corals MAS1, MAS3 and ANDRA were drilled in March 2007 from Antongil Bay, NE Madagascar, dating back to 1904, 1880 and 1914, respectively. (Grove et al., 2010). Another live coral, MASB was drilled in October 2008, dating back to 1708.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013andra.txt Data File; ANDRA Core data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013.xlsx Data File; All data, Excel format GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013ifaho.txt Data File; IFAHO Core data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas1.txt Data File; MAS1 Core data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013masb.txt Data File; MASB Core data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas3.txt Data File; MAS3 Core data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11