White Mountains Bristlecone Pine d13C and Precipitation Reconstruction Bale, R.J.; Robertson, I.; Salzer, M.W.; Loader, N.J.; Leavitt, S.W.; Gagen, M.; Harlan, T.P.; McCarroll, D. Bale, R.J. Robertson, I. Salzer, M.W. Loader, N.J. Leavitt, S.W. Gagen, M. Harlan, T.P. McCarroll, D. Precipitation Reconstruction drought PILO Pinus longaeva D.K. Bailey = Pinus aristata var. longaeva Intermountain bristlecone pine earth science/paleoclimate/tree ring (delta 13C,alpha cellulose,null,per mil VPDB,null,tree ring,corrected,isotope ratio mass spectrometry,N,"After correction for the isotopic composition of the atmosphere, a second correction (known as the PreINdustrial or PIN correction, which represents a change in ecophysiological response to rapidly rising concentrations of CO2) was applied to the fossil fuel corrected data") earth science/paleoclimate/tree ring (delta 13C,alpha cellulose,null,per mil VPDB,null,tree ring,corrected,isotope ratio mass spectrometry,N,"corrected to a pre-industrial atmospheric d13C base value of -6.4 per mil using simple addition, compensating for the 'anthropogenic decline' from input to the atmosphere of 13C-depleted CO2 from fossil fuel combustion and land-use change") earth science/paleoclimate/tree ring (delta 13C,alpha cellulose,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/climate reconstructions|tree ring (precipitation,null,null,centimeter,Jun-Aug,climate reconstructions|tree ring,null,null,N,null) earth science/paleoclimate/tree ring (age,null,null,year Common Era,null,tree ring,null,null,N,null) earth science/paleoclimate/tree-ring (Blanco West>LATITUDE 37.45>LONGITUDE -118.1667) We present the first near millennium-length, annually resolved stable isotope record from bristlecone pines (Pinus longaeva, D.K Bailey). The carbon isotope ratios from the cellulose of seven trees from the White Mountains of California, corrected for anthropogenic changes in atmospheric chemistry, are used to reconstruct growing season (June through August) precipitation back to AD 1085. Extremely negative isotope results are strongly correlated with proposed severest El Niño events over the last 500 yr, and similar values in the first half of the millennium are used to reconstruct a further 13 strong El Niño events, concentrated in the 12th Century and the mid 13th and 14th Centuries. Ring-width chronologies from adjacent sites in the White Mountains demonstrate a high degree of decadal covariance with the d13C series, although there are several periods of notable divergence. STUDY NOTES: Carbon isotope data and precipitation reconstruction for the last 920 years from bristlecone pine tree rings collected in the White Mountains, California, USA. Two corrections are applied to the raw d13C data prior to precipitation reconstruction, and the two corrected series plus the original raw d13C series are provided in the data files. The raw d13C measurements were corrected to a pre-industrial atmospheric d13C base value of -6.4 per mil using simple addition, compensating for the 'anthropogenic decline' from input to the atmosphere of 13C-depleted CO2 from fossil fuel combustion and land-use change. After correction for the isotopic composition of the atmosphere, a second correction (known as the PreINdustrial or PIN correction, which represents a change in ecophysiological response to rapidly rising concentrations of CO2) was applied to the fossil fuel corrected data, producing a series used for palaeoclimate reconstruction. Blanco West tree ring site, White Mountains, California: 37°27'N, 118°10'W, ~3200m elevation. IITRDB003 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bale, R.J. Investigator : Robertson, I. Investigator : Salzer, M.W. Investigator : Loader, N.J. Investigator : Leavitt, S.W. Investigator : Gagen, M. Investigator : Harlan, T.P. Investigator : McCarroll, D. 2011-07-22 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11915 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.xls https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.xls https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.txt English https://www.ncdc.noaa.gov/paleo/study/11915 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.xls https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/usa/california/blanco2011d13c.txt Bale, R.J., I. Robertson, M.W. Salzer, N.J. Loader, S.W. Leavitt, M. Gagen, T.P. Harlan, and D. McCarroll. 2011. An annually resolved bristlecone pine carbon isotope chronology for the last millennium. Quaternary Research, Vol. 76, Issue 1, pp 22-29, July 2011. doi:10.1016/j.yqres.2011.05.004 START YEAR: 1085 AD * END YEAR: 2005 AD -118.1667 37.45 -118.1667 37.45