Nir'pa Co, Tibet 3,300 Year Geochemical and Physical Properties Data Bird, B.W.; Lei, Y.; Perello, M.; Polissar, P.J.; Yao, T.; Finney, B.P.; Bain, D.J.; Pompeani, D.P.; Thompson, L.G. Bird, B.W. Lei, Y. Perello, M. Polissar, P.J. Yao, T. Finney, B.P. Bain, D.J. Pompeani, D.P. Thompson, L.G. Monsoon earth science/paleoclimate/paleolimnology (zinc,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (manganese,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (nickel,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (arsenic,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (rhenium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,x10-5 units; Core A-11) earth science/paleoclimate/paleolimnology (volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,x10-5 units; Core A-15) earth science/paleoclimate/paleolimnology (clay,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (aluminum,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (argon,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (iron,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (iridium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 13C,organic matter,null,per mil VPDB,null,paleolimnology,null,continuous-flow isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleolimnology (organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,null) earth science/paleoclimate/paleolimnology (sand,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (yttrium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (cesium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (barium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (gallium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth 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second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (silt,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,null) earth science/paleoclimate/paleolimnology (phosphorus,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (potassium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (germanium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (rubidium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (strontium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (mercury,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (thallium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,weight percent,null,paleolimnology,null,spectrophotometry,N,Weight % (2.4 x Si)) earth science/paleoclimate/paleolimnology (nitrogen,sediment,null,weight percent,null,paleolimnology,null,elemental analysis,N,null) earth science/paleoclimate/paleolimnology (carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,total organic carbon/total nitrogen) earth science/paleoclimate/paleolimnology (density,dry sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (titanium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (chromium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (cobalt,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (tantalum,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (platinum,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (bismuth,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (copper,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (organic carbon,sediment,null,weight percent,null,paleolimnology,null,elemental analysis,N,null) earth science/paleoclimate/paleolimnology (mineral matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,null) earth science/paleoclimate/paleolimnology (silicon,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (sulfur,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (gold,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (lead,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Nir'pa Co>LATITUDE 29.734>LONGITUDE 92.386) Sedimentological and geochemical results from Nir'pa Co, an alpine lake on the southeastern Tibetan Plateau, detail late-Holocene Indian summer monsoon (ISM) hydroclimate during the last 3300 years. Constrained by modern calibration, elevated silt and lithics and low sand and clay between 3.3 and 2.4 ka and 1.3 ka and the present indicate two pluvial phases with lake levels near their current overflow elevation. Between 2.4 and 1.3 ka, a sharp increase in sand and corresponding decrease in lithics and silt suggest drier conditions and lower lake levels at Nir'pa Co. Hydroclimate expressions in the sedimentological proxies during the Medieval Climate Anomaly (MCA) and 'Little Ice Age’ (LIA) are not statistically significant, suggesting that these events were minor compared to the millennial scale variability on which they were superimposed. However, decreasing sand and increasing lithics and silt during the MCA between 950 and 800 cal. yr BP may suggest briefly wetter conditions, while increasing sand and reduced lithics and silt from 500 to 200 cal. yr BP suggest potentially drier conditions during the LIA. Similarities with regional records from lake sediment and ice cores and speleothem records from the central and eastern Tibetan Plateau, India, and the Arabian Sea, suggest generally coherent late-Holocene ISM variability in these regions. Increased late-Holocene ISM intensity occurred during times when Tibetan Plateau surface air temperatures were warmer, Indo-Pacific sea surface temperatures were elevated, and the tropical Pacific was in a La Niña-like mean state. Conversely, aridity between 2.4 and 1.3 ka occurred in concert with cooling on the Tibetan Plateau and in the Indo-Pacific with more El Niño-like conditions in the tropical Pacific. Differences with western Tibetan records may reflect a weakened ISM and stronger westerlies in this region during the late-Holocene. STUDY NOTES: Sediment geochemical and physical properties data from two cores collected in Nir'pa Co, Tibet for the past 3,300 years. Measured parameters include: Dry bulk density, Total organic matter, Biogenic Opal, C-N, d13C, d15N, clay/silt/sand, Magnetic susceptibility, and XRF mineralogy. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bird, B.W. Investigator : Lei, Y. Investigator : Perello, M. Investigator : Polissar, P.J. Investigator : Yao, T. Investigator : Finney, B.P. Investigator : Bain, D.J. Investigator : Pompeani, D.P. Investigator : Thompson, L.G. 2016-10-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20368 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017gs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017dbd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017opal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a11.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a15.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017cn.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017gs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017dbd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017opal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a11.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a15.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017cn.txt English https://www.ncdc.noaa.gov/paleo/study/20368 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017gs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017dbd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017opal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a11.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a15.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017cn.txt Broxton W. Bird, Yanbin Lei, Melanie Perello, Pratigya J. Polissar, Tandong Yao, Bruce Finney, Daniel Bain, David Pompeani and Lonnie G. Thompson2016Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern TibetThe Holocene10.1177/0959683616670220http://hol.sagepub.com/content/early/2016/09/27/0959683616670220.abstract START YEAR: 3338 cal yr BP * END YEAR: -49 cal yr BP 92.386 29.734 92.386 29.734