Routson - Summitville - PIAR - ITRDB CO656 Routson, C.; Woodhouse, C.A.; Overpeck, J.T. Routson, C. Woodhouse, C.A. Overpeck, J.T. PIAR Pinus aristata Engelm. Rocky Mountain bristlecone pine earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV001A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV013B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV021B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV023A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV025A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV036B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV038B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV005A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV008C; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV021C; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV030A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV040A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV041A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (tree ring standardized growth index,null,null,null,null,tree ring,composited,standard,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV053A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV006B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV032A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (number of samples,null,null,count,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV024A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV039A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV044A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV007B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV035A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV045A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (age,null,null,year Common Era,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (tree ring standardized growth index,null,null,null,null,tree ring,composited,residual,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV011B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV037D; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV043B; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV050A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (tree ring standardized growth index,null,null,null,null,tree ring,composited,ARSTAN,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV027C; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV042A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV043A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: SMV047A; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree-ring (Summitville>LATITUDE 37.437236>LONGITUDE -106.631074) A new tree‐ring record from living and remnant bristlecone pine (Pinus aristata) wood from the headwaters region of the Rio Grande River, Colorado is used in conjunction with other regional records to evaluate periods of unusually severe drought over the past two millennia (B.C. 268 to A.D. 2009). Our new record contains a multi‐century period of unusual dryness between 1 and 400 A.D., including an extreme drought during the 2nd century. Characterized by almost five decades of drought (below average ring width), we hypothesize this megadrought is equally, if not more severe than medieval period megadroughts in this region. Published paleoclimate time series help define the spatial extent, severity, and potential causes of the 2nd century megadrought. Furthermore, this early period of unusual dryness has intriguing similarities to later medieval period aridity. Our findings suggest we should anticipate similar severe drought conditions in an even warmer and drier future. STUDY NOTES: NOAA Template Chronology file added 2019-07-05. NOAA Template Raw Measurements file added 2019-07-05. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Routson, C. Investigator : Woodhouse, C.A. Investigator : Overpeck, J.T. 2018-02-28 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23656 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/co656.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/co656.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a-noaa.crn English https://www.ncdc.noaa.gov/paleo/study/23656 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656-noaa.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656r.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656.crn https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/co656.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/co656.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/northamerica/usa/co656a-noaa.crn Cody C. Routson, Connie A. Woodhouse, Jonathan T. Overpeck2011Second century megadrought in the Rio Grande headwaters, Colorado: How unusual was medieval drought?Geophysical Research LettersL22703382210.1029/2011GL050015https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2011GL050015 START YEAR: -268 AD * END YEAR: 2009 AD -106.631074 37.437236 -106.631074 37.437236