Lake Logung, Indonesia 1400 Year Multiproxy Sediment Data Rodysill, J.R.; Russell, J.M.; Bijaksana, S.; Brown, E.T.; Safiuddin, L.O.; Eggermont, H. Rodysill, J.R. Russell, J.M. Bijaksana, S. Brown, E.T. Safiuddin, L.O. Eggermont, H. ENSO Warm Pool earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (nitrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null) earth science/paleoclimate/paleolimnology (volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,magnetic susceptibility measurement with point or surface sensor,N,null) earth science/paleoclimate/paleolimnology (organic carbon,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 13C,organic matter,null,per mil,null,paleolimnology,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleolimnology (age,null,null,year Common Era,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,null,N,total organic carbon/total nitrogen) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,percent,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (inorganic carbon,sediment,null,percent,null,paleolimnology,null,carbon coulometry,N,null) earth science/paleoclimate/paleolimnology (delta 15N,organic matter,null,per mil,null,paleolimnology,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake Logung>LATITUDE -8.0418>LONGITUDE 113.3075) Variations in the location and strength of convection in the Western Pacific Warm Pool (WPWP) have a profound impact on the distribution and amount of global rainfall. Much of the variability in WPWP convection is attributed to variations in the El Niño-Southern Oscillation, for which the long-term trends and forcing mechanisms remain poorly understood. Despite the importance of WPWP convection to global climate change, we have very few paleohydrological reconstructions from the region. Here we present a new paleolimnologic and paleohydrologic record spanning the past 1,400 years using a multi- proxy dataset from Lake Logung, located in East Java, Indonesia that provides insights into centennial-scale trends in warm pool hydrology. Organic matter d13C data indicate that East Java became wetter over the last millennium until ca. 1800 Common Era (CE), consistent with evidence for the southward migration of the Intertropical Convergence Zone (ITCZ) during this time. Superimposed on this long-term trend are four decade- to century-scale droughts, inferred from organic matter d13C and calcite abundance data. They are centered at 1030, 1550, 1830, and 1996 CE. The three more recent droughts correlate with hydrologic anomalies documented in other proxy records from the WPWP region on both sides of the equator, and the two most recent droughts correlate in time with historically documented periods of multiple, intense El Niño events. Thus, our record provides strong evidence that century-scale hydrologic variability in this region relates to changes in the Walker Circulation. Human activity within the lake catchment is apparent since 1860 CE. STUDY NOTES: Multiproxy sediment data from Lake Logung, Indonesia, for the past 1400 years. Paleoenvironmental proxies measured include Magnetic Susceptibility, Organic and Inorganic Carbon , Total N, C:N ratio, C and N isotopes, and Biogenic Opal. Lake Logung, Indonesia: 8°2.509'S, 113°18.452'E, 215m elevation, 7m water depth. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rodysill, J.R. Investigator : Russell, J.M. Investigator : Bijaksana, S. Investigator : Brown, E.T. Investigator : Safiuddin, L.O. Investigator : Eggermont, H. 2012-08-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13177 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.txt English https://www.ncdc.noaa.gov/paleo/study/13177 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/indonesia/logung2012.txt Rodysill, J.R., J.M. Russell, S. Bijaksana, E.T. Brown, L.O. Safiuddin, and H. Eggermont. 2012. A paleolimnological record of rainfall and drought from East Java, Indonesia during the last 1,400 years. Journal of Paleolimnology, Vol. 47, No. 1, pp. 125-139. DOI: 10.1007/s10933-011-9564-3 START YEAR: 614 AD * END YEAR: 2009 AD 113.3075 -8.0418 113.3075 -8.0418