# A 1500-Year Reconstruction of Annual Mean Temperature for Temperate North America on Decadal-to-Multidecadal Time Scales #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference when using these data, # plus the Online Resource and date accessed. # # Online_Resource: http://www.hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID: # # Original_Source_URL: http://www.neotomadb.org/ # # Archive: Climate Reconstructions #-------------------- # Contribution_Date # Date: 2012-12-05 #-------------------- # Title # Study_Name: A 1500-Year Reconstruction of Annual Mean Temperature for Temperate North America on Decadal-to-Multidecadal Time Scales #-------------------- # Investigators # Investigators: Trouet,V.; Diaz, H.F; Wahl, E.R.; Viau, A.E.; Graham, R.; Graham, N.; Cook, E.R. #-------------------- # Description_and_Notes # Description: #-------------------- # Publication # Authors: Trouet, V., H.F. Diaz, E.R. Wahl, A. Viau, R. Graham, N. Graham, and E.R. Cook # Published_Date_or_Year: 2013 # Published_Title: A 1500-Year Reconstruction of Annual Mean Temperature for Temperate North America on Decadal-to-Multidecadal Time Scales # Journal_Name: Environmental Research Letters # Volume: 8 # Edition: # Issue: 2 # Pages: # Report_Number: 024008 # DOI: 10.1088/1748-9326/8/2/024008 # Publication_Place: # Publisher: # ISBN: # Online_Resource: # Other_Reference_Details: # Abstract: We present two reconstructions of annual average temperature over temperate North America: a tree-ring based reconstruction at decadal resolution (1200–1980 CE) and a pollen-based reconstruction at 30-year resolution that extends back to 480 CE. We maximized reconstruction length by using long but low-resolution pollen records and applied a three-tier calibration scheme for this purpose: the tree-ring based reconstruction was calibrated against instrumental annual average temperatures on annual and decadal scale, was then reduced to a lower resolution, and was used as a calibration target for the pollen-based reconstruction. Before late-19th to early-21st century times, there are three prominent low-frequency periods in our extended reconstruction starting at 480 CE, notably the Dark Ages cool period (ca. 500–700 CE) and Little Ice Age (ca. 1300–1850 CE), and the warmer Medieval Climate Anomaly (MCA; ca. 800–1200 CE). The 9th and the 11th Century are the warmest centuries and they constitute the core of the MCA in our reconstruction, a period characterized by centennial-scale aridity in the North American West. These two warm peaks are slightly warmer than the baseline period (1904-1980), but nevertheless much cooler than North American temperatures during the early 21st Century. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: North America # Location: North America # Region: PAGES NAmerica 2k # Country: USA and Canada # Northernmost_Latitude: 70.00 # Southernmost_Latitude: 25.00 # Easternmost_Longitude: -50.00 # Westernmost_Longitude: -170.00 # Elevation: #------------------ # Data_Collection (required, One data collection per file) # Collection_Name: NAmerican Temperature Anomalies # First_Year: 360 # Last_Year: 1950 # Time_Unit: AD # Core_Length: # Notes: regional compisite mean anuual temperature reconstruction using pollen #------------------ # Chronology: # # FOR NEOTOMA AND NAPD, THE DATING CONTROL ARE STORED IN DIFFERENT FILES (RELATIONAL DB). EG. FOR NAPD TABLES AGEBASIS, AGEBOUND, C14, CHRON AND GEOCHRON ALL CONTAIN INFORMATION REGARDING MATERIAL DATED, AGE-DEPTH MODEL, TOP AND BOTTOM DATES, 14C ERRORS AND LAB INFOProvide in this header as comma separated values (csv) one sample per row, using the following fields, or provide a csv file and provide file name here (name.csv) # # #---------------- # Variables age_calBP age, , ,calendar years before 1950 AD, ,, ,,N temp_anom_Mtn Temperature anomaly,Mtn_veg_ecoregion pollen,,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Mtn_err Temperature anomaly,Mtn_veg_ecoregion pollen,1_standard error,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Decid Temperature anomaly,Deciduous_ecoregion pollen,,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Decid_err Temperature anomaly,Deciduous_ecoregion pollen,1_standard error,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Con Temperature anomaly,Conifer_hardwood_ecoregion pollen,,degrees Celsius,, reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Con_err Temperature anomaly,Conifer_hardwood_ecoregion pollen,1_standard error,degrees Celsius, ,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Bor Temperature anomaly,Boreal_ecoregion pollen,,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N temp_anom_Bor_err Temperature anomaly,Boreal_ecoregion pollen,1_standard error,degrees Celsius,,reconstruction,1961-1990 AD anomaly period,Modern Analogue Technique with squared-chord distance coefficient,N # DATA # Missing_Values: NA age_calBP temp_anomaly_Mtn temp_anom_Mtn_err temp_anom_Decid temp_anom_Decid_err temp_anom_Con temp_anom_Con_err temp_anom_Bor temp_anom_Bor_err 360 -0.4525 NA -0.1509 NA -0.4475 NA -0.2938 NA 390 -0.3640 NA -0.1977 NA -0.2964 NA -0.3830 NA 420 -0.2756 NA -0.2445 NA -0.1454 NA -0.4721 NA 450 -0.1871 0.9237 -0.2912 0.2131 0.0057 0.1699 -0.5613 0.1978 480 -0.1188 0.7845 -0.2649 0.1974 -0.0077 0.1446 -0.4509 0.1818 510 -0.0505 0.6453 -0.2386 0.1818 -0.0210 0.1193 -0.3405 0.1659 540 0.0178 0.5061 -0.2123 0.1662 -0.0343 0.0939 -0.2301 0.1499 570 0.0236 0.4517 -0.1970 0.1560 -0.0518 0.0837 -0.1933 0.1385 600 -0.0019 0.4397 -0.1873 0.1487 -0.0714 0.0810 -0.1932 0.1294 630 -0.0274 0.4276 -0.1775 0.1413 -0.0910 0.0782 -0.1932 0.1203 660 -0.0468 0.4183 -0.1620 0.1353 -0.0793 0.0773 -0.1912 0.1135 690 -0.0539 0.4145 -0.1349 0.1321 -0.0049 0.0799 -0.1851 0.1114 720 -0.0611 0.4107 -0.1078 0.1289 0.0694 0.0825 -0.1789 0.1093 750 -0.0682 0.4069 -0.0807 0.1258 0.1437 0.0852 -0.1728 0.1072 780 -0.0637 0.4033 -0.0865 0.1250 0.1915 0.0819 -0.2542 0.1063 810 -0.0592 0.3996 -0.0924 0.1242 0.2393 0.0787 -0.3355 0.1054 840 -0.0547 0.3960 -0.0983 0.1235 0.2871 0.0755 -0.4169 0.1045 870 -0.0885 0.3913 -0.1326 0.1228 0.2719 0.0745 -0.3916 0.1036 900 -0.1414 0.3860 -0.1812 0.1222 0.2252 0.0747 -0.3130 0.1027 930 -0.1943 0.3807 -0.2298 0.1215 0.1785 0.0748 -0.2344 0.1019 960 -0.2415 0.3768 -0.2634 0.1208 0.1451 0.0752 -0.1879 0.1011 990 -0.2776 0.3756 -0.2670 0.1200 0.1381 0.0759 -0.2057 0.1005 1020 -0.3136 0.3744 -0.2706 0.1192 0.1312 0.0767 -0.2235 0.0998 1050 -0.3497 0.3732 -0.2742 0.1183 0.1243 0.0774 -0.2412 0.0991 1080 -0.3215 0.3760 -0.2822 0.1190 0.1027 0.0760 -0.2690 0.0989 1110 -0.2934 0.3787 -0.2901 0.1196 0.0812 0.0745 -0.2967 0.0986 1140 -0.2652 0.3815 -0.2980 0.1203 0.0596 0.0731 -0.3244 0.0984 1170 -0.2675 0.3824 -0.3179 0.1202 0.0138 0.0720 -0.3536 0.0986 1200 -0.2850 0.3823 -0.3437 0.1198 -0.0440 0.0711 -0.3836 0.0990 1230 -0.3026 0.3822 -0.3695 0.1194 -0.1019 0.0702 -0.4136 0.0995 1260 -0.3330 0.3825 -0.3864 0.1189 -0.1372 0.0698 -0.4192 0.0999 1290 -0.3894 0.3837 -0.3857 0.1181 -0.1276 0.0706 -0.3758 0.1002 1320 -0.4458 0.3849 -0.3849 0.1173 -0.1180 0.0715 -0.3324 0.1005 1350 -0.5022 0.3861 -0.3842 0.1165 -0.1084 0.0723 -0.2890 0.1008 1380 -0.5392 0.3894 -0.3981 0.1167 -0.1257 0.0734 -0.2302 0.1008 1410 -0.5763 0.3926 -0.4121 0.1170 -0.1429 0.0745 -0.1713 0.1009 1440 -0.6134 0.3959 -0.4260 0.1172 -0.1602 0.0757 -0.1124 0.1009 1470 -0.6363 0.4028 -0.4480 0.1167 -0.1803 0.0774 -0.1107 0.1006 1500 -0.6522 0.4115 -0.4740 0.1157 -0.2018 0.0795 -0.1376 0.1002 1530 -0.6681 0.4203 -0.5001 0.1148 -0.2232 0.0816 -0.1645 0.0998 1560 -0.6353 0.4281 -0.5129 0.1135 -0.2250 0.0836 -0.2001 0.0995 1590 -0.5052 0.4343 -0.4994 0.1117 -0.1872 0.0856 -0.2529 0.0993 1620 -0.3470 0.4290 -0.4338 0.1106 -0.1528 0.0879 -0.3189 0.0999 1650 -0.1748 0.4181 -0.3422 0.1098 -0.1201 0.0904 -0.3915 0.1010 1680 -0.2113 0.4031 -0.2563 0.1112 -0.0776 0.0841 -0.4672 0.1017 1710 -0.2464 0.3926 -0.2059 0.1118 -0.0649 0.0783 -0.4888 0.1019 1740 -0.2788 0.3910 -0.2264 0.1111 -0.1118 0.0734 -0.4021 0.1015 1770 -0.2753 0.3960 -0.2276 0.1094 -0.1819 0.0719 -0.3691 0.1013 1800 -0.2538 0.4043 -0.2192 0.1071 -0.2636 0.0721 -0.3629 0.1013 1830 -0.1967 0.4233 -0.2537 0.1061 -0.3497 0.0741 -0.3384 0.1017 1860 -0.1994 0.4383 -0.2254 0.1064 -0.4136 0.0776 -0.3246 0.1023 1890 -0.3216 0.4454 -0.0715 0.1088 -0.4330 0.0840 -0.3320 0.1033 1920 -0.2617 0.4435 0.0009 0.1075 -0.2688 0.0989 -0.2411 0.1037 1950 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000