Mesoamerican 1238 Year June PDSI Reconstructions Stahle, D.W.; Diaz, J.V.; Burnette, D.J.; Paredes, J.C.; Heim, R.R.; Fye, F.K.; Acuña Soto, R.; Therrell, M.D.; Cleaveland, M.K.; Stahle, D.K. Stahle, D.W. Diaz, J.V. Burnette, D.J. Paredes, J.C. Heim, R.R. Fye, F.K. Acuña Soto, R. Therrell, M.D. Cleaveland, M.K. Stahle, D.K. Palmer Drought Index Reconstruction drought earth science/paleoclimate/climate reconstructions|tree ring (age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null) earth science/paleoclimate/climate reconstructions|tree ring (Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,AR(2) persistence structure of the predictand was added back in and the variance lost in regression was restored.) earth science/paleoclimate/instrumental (Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,whitened,null,N,whitened' = serially random residuals from an autoregressive model of order p fit to the original time series) earth science/paleoclimate/tree ring (tree ring standardized growth index,null,null,null,null,tree ring,composited,standard,N,null) earth science/paleoclimate/instrumental (Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,null,null,N,"extracted for 84 grid locations in central Mexico from the R.R. Heim, Jr., half degree monthly PDSI data set for North America.") earth science/paleoclimate/climate reconstructions|tree ring (Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,whitened,null,N,based on a calibration between the serially random predictor and predictand time series) earth science/paleoclimate/climate reconstructions|tree ring (Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,smoothed,null,N,30-year spline fit) earth science/paleoclimate/tree ring (tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,"whitened using the coefficients of the AR(2) model calculated from the instrumental June PDSI, 1973-2003") earth science/paleoclimate/reconstructions (Barranca de Amealco>LATITUDE 20.35>LONGITUDE -100.1167) Ancient Montezuma baldcypress (Taxodium mucronatum) trees found in Barranca de Amealco, Queretaro, have been used to develop a 1,238-year treering chronology that is correlated with precipitation, temperature, drought indices, and crop yields in central Mexico. This chronology has been used to reconstruct the spring-early summer soil moisture balance over the heartland of the Mesoamerican cultural province, and is the first exactly dated, annually resolved paleoclimatic record for Mesoamerica spanning the Late Classic, Post Classic, Colonial, and modern eras. The reconstruction indicates that the Terminal Classic drought extended into central Mexico, supporting other sedimentary and speleothem evidence for this early 10th century drought in Mesoamerica. The reconstruction also documents severe and sustained drought during the decline of the Toltec state (1149-1167) and during the Spanish conquest of the Aztec state (1514-1539), providing a new precisely dated climate framework for Mesoamerican cultural change. STUDY NOTES: Tree ring reconstruction of June Palmer Drought Severity Index (PDSI) for central Mexico for the past 1238 years. Also archived are the instrumental June PDSI, extracted for 84 grid locations in central Mexico from the R.R. Heim, Jr., half degree monthly PDSI data set for North America, the standard tree-ring chronology from Barranca de Amealco, and the calibration and verification statistics for the whitened and final reddened reconstructions. The gridpoints range from 16.8°N to 21.3°N, and from 96.3°W to 102.3°W. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Stahle, D.W. Investigator : Diaz, J.V. Investigator : Burnette, D.J. Investigator : Paredes, J.C. Investigator : Heim, R.R. Investigator : Fye, F.K. Investigator : Acuña Soto, R. Investigator : Therrell, M.D. Investigator : Cleaveland, M.K. Investigator : Stahle, D.K. 2011-05-27 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11175 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.xls https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.xls English https://www.ncdc.noaa.gov/paleo/study/11175 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mexico/mesoamerica2011pdsi.xls Stahle, D.W., J.V. Diaz, D.J. Burnette, J.C. Paredes, R.R. Heim Jr., F.K. Fye, R. Acuna Soto, M.D. Therrell, M.K. Cleaveland, and D.K. Stahle. 2011. Major Mesoamerican droughts of the past millennium. Geophysical Research Letters, Vol. 38, L05703, doi:10.1029/2010GL046472. START YEAR: 771 AD * END YEAR: 2008 AD -100.1167 20.35 -100.1167 20.35