# Sygera Mountain, Tibetan Plateau 189 Year Summer Temperature Reconstruction #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/23950 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/asia/china/sygera2018temp.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Climate Reconstructions # # Dataset DOI: # # Parameter_Keywords: air temperature #-------------------- # Contribution_Date # Date: 2018-04-28 #-------------------- # File_Last_Modified_Date # Date: 2018-04-28 #-------------------- # Title # Study_Name: Sygera Mountain, Tibetan Plateau 189 Year Summer Temperature Reconstruction #-------------------- # Investigators # Investigators: Li, M.Y.; Duan, J.P.; Wang, L.; Zhu H.F. #-------------------- # Description_and_Notes # Description: Late summer (August-September) mean temperature reconstruction for the Sygera Mountains region, southeastern Tibetan Plateau, # since 1820 CE, based on tree-ring mean latewood density (LWD) chronology. #-------------------- # Publication # Authors: Mingyong Li, Jianping Duan, Lily Wang, Haifeng Zhu # Published_Date_or_Year: 2018-04-01 # Published_Title: Late summer temperature reconstruction based on tree-ring density for Sygera Mountain, southeastern Tibetan Plateau # Journal_Name: Global and Planetary Change # Volume: 163 # Edition: # Issue: # Pages: 10-17 # Report_Number: # DOI: 10.1016/j.gloplacha.2018.02.005 # Online_Resource: https://www.sciencedirect.com/science/article/pii/S0921818117303235 # Full_Citation: # Abstract: Although several tree-ring density-based summer/late summer temperature reconstructions have been developed on the Tibetan Plateau (TP), the understanding of the local/regional characteristics of summer temperature fluctuations on a long-term scale in some regions is still limited. To improve our understanding in these aspects, more local or regional summer temperature reconstructions extending back over several centuries are required. In this study, a new mean latewood density (LWD) chronology from Abies georgei var. smithii from the upper tree line of Sygera Mountain on the southeastern TP was developed to reconstruct the late summer temperature variability since 1820CE. The bootstrapped correlation analysis showed that the LWD chronology index was significantly and positively correlated with the late summer (August-September) mean temperatures (r1950-2008=0.63, p<0.001) recorded at the nearest meteorological station and that this reconstruction has considerable potential to represent the late summer temperature variability at the regional scale. Our late summer temperature reconstruction revealed three obvious cold periods (i.e., 1872-1908, 1913-1937 and 1941-1966) and two relatively warm phases (i.e., 1821-1871 and 1970-2008) over the past two centuries. Comparisons of our reconstruction with other independent tree-ring-based temperature reconstructions, glacier fluctuations and historical documental records from neighboring regions showed good agreement in these relatively cold and warm intervals. Our reconstruction exhibits an overall increasing temperature trend since the 1960s, providing new evidence supporting the recent warming of the TP. Moreover, our results also indicate that the late summer temperature variability of Sygera Mountain on the southeastern TP has potential links with the Pacific Decadal Oscillation (PDO). #------------------ # Funding_Agency # Funding_Agency_Name: Ministry of Science and Technology of the People's Republic of China # Grant: 2016YFA0600404 #------------------ # Funding_Agency # Funding_Agency_Name: National Natural Science Foundation of China # Grant: 41471035, 41571094, 41101043, 41271120, 41771240 #------------------ # Site_Information # Site_Name: Sygera Mountain # Location: Asia>Eastern Asia>China # Country: China # Northernmost_Latitude: 29.64 # Southernmost_Latitude: 29.64 # Easternmost_Longitude: 94.71 # Westernmost_Longitude: 94.71 # Elevation: 4128 m #------------------ # Data_Collection # Collection_Name: Sygera2018temp # Earliest_Year: 1820 # Most_Recent_Year: 2008 # Time_Unit: CE # Core_Length: # Notes: #------------------ # Chronology_Information # Chronology: # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## age_CE age, , , years CE, , , , ,N, ## AStemp temperature, , , degrees C, August-September, Climate Reconstruction, , ,N, ## LWDCRN mean latewood density, cellulose, , dimensionless index, , tree ring, chronology indices, ,N, ## SD Sample depth, , , , , tree ring, Sample depths for mean latewood density, ,N, # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_AD AStemp LWDCRN SD 1820 12.194716 1.034 13 1821 11.803894 0.981 13 1822 12.637156 1.094 13 1823 12.526546 1.079 13 1824 12.49705 1.075 13 1825 12.60766 1.09 13 1826 12.489676 1.074 13 1827 12.320074 1.051 14 1828 12.430684 1.066 14 1829 12.592912 1.088 14 1830 11.634292 0.958 14 1831 12.674026 1.099 14 1832 12.379066 1.059 15 1833 11.68591 0.965 16 1834 12.688774 1.101 16 1835 11.90713 0.995 16 1836 11.988244 1.006 16 1837 12.526546 1.079 17 1838 12.209464 1.036 17 1839 12.452806 1.069 17 1840 12.600286 1.089 18 1841 11.892382 0.993 18 1842 12.42331 1.065 18 1843 11.826016 0.984 18 1844 12.799384 1.116 18 1845 12.157846 1.029 18 1846 12.585538 1.087 19 1847 12.438058 1.067 19 1848 12.120976 1.024 19 1849 12.268456 1.044 19 1850 12.076732 1.018 19 1851 12.401188 1.062 21 1852 12.143098 1.027 22 1853 11.789146 0.979 22 1854 11.973496 1.004 22 1855 12.216838 1.037 22 1856 12.297952 1.048 22 1857 11.803894 0.981 24 1858 12.511798 1.077 24 1859 12.430684 1.066 24 1860 12.253708 1.042 25 1861 12.60766 1.09 25 1862 11.39095 0.925 26 1863 12.179968 1.032 26 1864 12.098854 1.021 27 1865 12.622408 1.092 27 1866 12.150472 1.028 27 1867 12.452806 1.069 27 1868 12.415936 1.064 27 1869 12.57079 1.085 27 1870 11.671162 0.963 27 1871 11.508934 0.941 27 1872 12.327448 1.052 27 1873 12.157846 1.029 27 1874 11.921878 0.997 28 1875 11.626918 0.957 29 1876 11.973496 1.004 29 1877 11.730154 0.971 30 1878 11.90713 0.995 30 1879 11.877634 0.991 30 1880 11.641666 0.959 30 1881 11.826016 0.984 31 1882 11.508934 0.941 31 1883 11.885008 0.992 31 1884 11.35408 0.92 32 1885 11.295088 0.912 32 1886 11.420446 0.929 32 1887 12.106228 1.022 32 1888 12.135724 1.026 32 1889 11.90713 0.995 32 1890 11.737528 0.972 32 1891 11.656414 0.961 32 1892 12.120976 1.024 32 1893 11.730154 0.971 33 1894 11.486812 0.938 33 1895 12.032488 1.012 33 1896 12.120976 1.024 33 1897 11.53843 0.945 33 1898 12.05461 1.015 33 1899 11.68591 0.965 33 1900 12.098854 1.021 33 1901 11.862886 0.989 33 1902 11.840764 0.986 33 1903 12.047236 1.014 33 1904 11.5753 0.95 33 1905 11.877634 0.991 33 1906 11.64904 0.96 33 1907 11.641666 0.959 33 1908 12.253708 1.042 33 1909 12.135724 1.026 34 1910 12.342196 1.054 34 1911 11.730154 0.971 34 1912 12.401188 1.062 34 1913 11.944 1 34 1914 11.671162 0.963 34 1915 12.002992 1.008 34 1916 11.848138 0.987 34 1917 12.150472 1.028 34 1918 11.98087 1.005 34 1919 12.20209 1.035 34 1920 11.324584 0.916 34 1921 12.135724 1.026 34 1922 12.172594 1.031 34 1923 12.135724 1.026 34 1924 11.87026 0.99 34 1925 11.53843 0.945 34 1926 11.663788 0.962 34 1927 11.64904 0.96 34 1928 11.619544 0.956 34 1929 11.855512 0.988 34 1930 11.803894 0.981 34 1931 11.936626 0.999 34 1932 11.767024 0.976 34 1933 11.24347 0.905 34 1934 11.885008 0.992 34 1935 11.553178 0.947 34 1936 12.179968 1.032 34 1937 12.039862 1.013 34 1938 12.445432 1.068 34 1939 11.995618 1.007 34 1940 11.973496 1.004 34 1941 12.23896 1.04 34 1942 11.892382 0.993 34 1943 12.010366 1.009 34 1944 11.5753 0.95 34 1945 11.789146 0.979 34 1946 12.216838 1.037 34 1947 11.988244 1.006 34 1948 11.899756 0.994 34 1949 11.877634 0.991 34 1950 11.457316 0.934 34 1951 11.83339 0.985 34 1952 11.68591 0.965 34 1953 11.855512 0.988 34 1954 11.634292 0.958 34 1955 11.479438 0.937 34 1956 11.737528 0.972 34 1957 11.781772 0.978 34 1958 11.744902 0.973 34 1959 11.597422 0.953 34 1960 11.767024 0.976 34 1961 11.90713 0.995 34 1962 11.007502 0.873 34 1963 12.01774 1.01 34 1964 11.811268 0.982 34 1965 11.199226 0.899 34 1966 12.23896 1.04 34 1967 12.002992 1.008 34 1968 12.356944 1.056 34 1969 12.084106 1.019 34 1970 12.106228 1.022 34 1971 12.371692 1.058 34 1972 11.287714 0.911 34 1973 12.16522 1.03 34 1974 12.224212 1.038 34 1975 12.039862 1.013 34 1976 12.246334 1.041 34 1977 11.634292 0.958 34 1978 12.061984 1.016 34 1979 11.914504 0.996 34 1980 12.172594 1.031 34 1981 12.327448 1.052 34 1982 12.379066 1.059 34 1983 12.106228 1.022 34 1984 12.12835 1.025 34 1985 12.445432 1.068 34 1986 11.87026 0.99 34 1987 11.50156 0.94 34 1988 12.334822 1.053 34 1989 12.069358 1.017 34 1990 11.885008 0.992 34 1991 11.877634 0.991 34 1992 12.327448 1.052 34 1993 11.774398 0.977 34 1994 12.209464 1.036 34 1995 12.098854 1.021 34 1996 12.113602 1.023 34 1997 11.656414 0.961 34 1998 12.113602 1.023 33 1999 12.002992 1.008 31 2000 12.113602 1.023 33 2001 12.187342 1.033 33 2002 12.025114 1.011 29 2003 12.438058 1.067 29 2004 12.408562 1.063 28 2005 12.393814 1.061 26 2006 12.747766 1.109 26 2007 12.408562 1.063 25 2008 12.268456 1.044 22