# Gray - Well's Draw - PIED - UT527, PAGES North America 2k Version #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using these data, # If there is no publication information, please cite investigator, title, online resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/1000103 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/namerica2k/nam-tr_130-ut527-1200-1987.txt # Original_Source_URL: https://www.ncdc.noaa.gov/paleo/study/12736 # # Archive: Tree Ring #------------------- # Contribution_Date # Date: 2013-05-15 #------------------- # Title: Gray - Well's Draw - PIED - UT527, PAGES North America 2k Version #------------------- # Investigators: Gray, S.T. #------------------- # Description_Notes_and_Keywords # Description: # #------------------- # Publication # Authors: Pederson, G.T., S.T. Gray, C.A. Woodhouse, J.L. Betancourt, D.B. Fagre, J.S. Littell, E. Watson, B.H. Luckman, and L.J. Graumlich. 2011. The unusual nature of recent snowpack declines in the North American Cordillera. Sciencexpress, Published online 9 June 2011. DOI: 10.1126/science.1201570 # Journal_Name: Science # Published_Title: The unusual nature of recent snowpack declines in the North American Cordillera # Published_Date_or_Year: 2011 # Volume: In western North America snowpack has declined in recent decades, and further losses are projected through the 21st century. Here we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff generating areas of the Colorado, Columbia and Missouri River drainages. Over the past millennium, late-20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains, and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western USA. # Pages: # DOI: 10.1126/science.1201570 # Full_Citation: # Abstract: #------------------- # Site Information # Site_Name: Well's Draw # Northernmost_Latitude: 39.8333 # Southernmost_Latitude 39.8333 # Easternmost_Longitude: -110.1667 # Westernmost_Longitude: -110.1667 # Elevation: 2145 #------------------- # Data Collection # Collection_Name: NAm-TR_130-ut527-1200-1987 # First_Year: 1200 # Last_Year: 1987 # Time_Unit: AD # Notes: #------------------- # Species # Species_Name: Pinus longaeva D.K. Bailey = Pinus aristata var. longaeva # Common_Name: Intermountain bristlecone pine #------------------- # Variables # variables format: shortname 9 var components: what,material,error,units,season,archive,detail,method, C or N for Char or Numeric data ## age_AD Age,,,years AD,,,,,N ## trsgi.0mean Tree Ring Standardized Growth Index,,,unitless,,Tree Ring,mean of zero,,N # #-------------------------- # Data # Missing Value: -999 age_AD trsgi.0mean 1200 .12991 1201 -.262151 1202 .371178 1203 .801622 1204 .735821 1205 2.22181 1206 1.85991 1207 .0613677 1208 -1.43833 1209 -.969504 1210 -.108617 1211 -.0565246 1212 -.221025 1213 .286186 1214 -.108617 1215 -.0839414 1216 -.777587 1217 -.999663 1218 -1.50962 1219 .752271 1220 .809847 1221 .55487 1222 .57132 1223 .428753 1224 .105235 1225 1.32254 1226 1.33077 1227 -1.01611 1228 1.14982 1229 -1.0216 1230 -.497935 1231 -.275859 1232 .445203 1233 -.826937 1234 -2.68306 1235 .50552 1236 -.563736 1237 .283444 1238 -.0921664 1239 -.122325 1240 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