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. Grove, C.A. Zinke, J. Peeters, F.J.C. Park, W. Scheufen, T. Kasper, S. Randriamanantsoa, B. McCulloch, M.T. Brummer, G.J.A. hydrology 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 earth science/paleoclimate/corals and sclerosponges (Antongil Bay IFAHO>LATITUDE -15.866133>LONGITUDE 50.312167) (Antongil Bay ANDRA>LATITUDE -15.686167>LONGITUDE 49.956983) (Antongil Bay MASB>LATITUDE -15.5094>LONGITUDE 49.7573) (Antongil Bay MAS1>LATITUDE -15.509433>LONGITUDE 49.757283) (Antongil Bay MAS3>LATITUDE -15.509633>LONGITUDE 49.7576) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Grove, C.A. Investigator : Zinke, J. Investigator : Peeters, F.J.C. Investigator : Park, W. Investigator : Scheufen, T. Investigator : Kasper, S. Investigator : Randriamanantsoa, B. Investigator : McCulloch, M.T. Investigator : Brummer, G.J.A. 2014-04-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16317 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013andra.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013ifaho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013masb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013andra.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013ifaho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013masb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas3.txt English https://www.ncdc.noaa.gov/paleo/study/16317 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013andra.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013ifaho.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013masb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/antongil2013mas3.txt C.A. Grove, J. Zinke, F. Peeters, W. Park, T. Scheufen, S. Kasper, B. Randriamanantsoa, M.T. McCulloch, and G.-J.A. Brummer2013Madagascar corals reveal a multidecadal signature of rainfall and river runoff since 1708Climate of the Past92641-65610.5194/cp-9-641-2013http://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. Brummer2012Spatial linkages between coral proxies of terrestrial runoff across a large embayment in MadagascarBiogeosciences983063-308110.5194/bg-9-3063-2012http://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. Brummer2010River runoff reconstructions from novel spectral luminescence scanning of massive coral skeletonsCoral Reefs293579-59110.1007/s00338-010-0629-yhttp://link.springer.com/article/10.1007%2Fs00338-010-0629-y START YEAR: 1708 AD * END YEAR: 2008 AD 49.757283 -15.866133 50.312167 -15.5094