# Gray - Nutter's Ridge - PIED - UT526, 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/1000102 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/namerica2k/nam-tr_129-ut526-1200-1987.txt # Original_Source_URL: https://www.ncdc.noaa.gov/paleo/study/12735 # # Archive: Tree Ring #------------------- # Contribution_Date # Date: 2013-05-15 #------------------- # Title: Gray - Nutter's Ridge - PIED - UT526, 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: Nutter's Ridge # Northernmost_Latitude: 39.8167 # Southernmost_Latitude 39.8167 # Easternmost_Longitude: -110.6667 # Westernmost_Longitude: -110.6667 # Elevation: 2235 #------------------- # Data Collection # Collection_Name: NAm-TR_129-ut526-1200-1987 # 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 -.84555 1201 -1.02134 1202 .238468 1203 -.822112 1204 -.034001 1205 -.529134 1206 .387887 1207 -.70492 1208 -2.79678 1209 -.775235 1210 -.499836 1211 -.485187 1212 -.206858 1213 -.18342 1214 -.452959 1215 -.608238 1216 .0656114 1217 -2.87589 1218 -1.85925 1219 -1.58678 1220 -.854339 1221 -1.3231 1222 -.690271 1223 -.655114 1224 -1.39049 1225 -.116035 1226 -.608238 1227 .288275 1228 -1.01548 1229 -.0398606 1230 .329292 1231 .258977 1232 -.400223 1233 -2.87589 1234 -.242015 1235 -1.38756 1236 .317572 1237 -.250805 1238 .0509625 1239 .130067 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