# Manali, NW India 242 Year Tree Ring Oxygen Isotope Data #----------------------------------------------------------------------- # 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/22549 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/asia/india/manali2017d18o.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Tree Ring # # Dataset DOI: # # Parameter_Keywords: oxygen isotopes #-------------------- # Contribution_Date # Date: 2018-01-19 #-------------------- # File_Last_Modified_Date # Date: 2018-01-19 #-------------------- # Title # Study_Name: Manali, NW India 241 Year Tree Ring Oxygen Isotope Data #-------------------- # Investigators # Investigators: Sano, M.; Dimri, A.; Ramesh, R.; Xu, C.; Li, Z.; Nakatsuka, T. #-------------------- # Description_Notes_and_Keywords # Description: Abies pindrow tree-ring oxygen isotope (d18O) data from Manali, northwestern India, for the past 242 years. #-------------------- # Publication # Authors: Masaki Sano, A.P. Dimri, R. Ramesh, Chenxi Xu, Zhen Li, Takeshi Nakatsuka # Published_Date_or_Year: 2017-10-01 # Published_Title: Moisture source signals preserved in a 242-year tree-ring d18O chronology in the western Himalaya # Journal_Name: Global and Planetary Change # Volume: 157 # Edition: # Issue: # Pages: 73-82 # Report_Number: # DOI: 10.1016/j.gloplacha.2017.08.009 # Online_Resource: https://www.sciencedirect.com/science/article/pii/S0921818116305379 # Full_Citation: # Abstract: The oxygen isotope ratio (d18O) of tree-ring cellulose is known to be a reliable proxy for hydroclimate in monsoon Asia. However, tree-ring d18O data are still spatially and temporally limited, so a denser tree-ring network in Asia is required to better understand the dynamics of the monsoon circulation and its past variability. Here, we present a 242-year d18O chronology calculated from five silver fir trees collected in the western (Indian) Himalaya, a region located on the northwestern periphery of the summer monsoon incursions. Response analyses using regionalized climatic data revealed that tree-ring d18O is controlled by hydroclimatic variables, including precipitation, relative humidity, and the drought index, during the summer monsoon season. In addition, spatial correlation analyses with gridded climatic parameters showed that the strongest correlations of tree-ring d18O are not observed with the climatic parameters at the sampling site, but with those in a region several hundred kilometers to the southwest, indicating that water vapor originating in the Arabian Sea is transported to the study site. Based on these results, we reconstructed the self-calibrating Palmer Drought Severity Index (scPDSI) for the summer monsoon season (June-September) over the past 242 years (1767-2008 CE), using a linear regression model that accounts for 45.0% of the actual scPDSI variance. Our chronology showed significant correlations with other tree-ring d18O data from Nepal and Bhutan, indicating that common signals related to the moisture supply from the Bay of Bengal are also recorded in the present reconstruction. However, the tree-ring record from India often showed weak correlations with that from Bhutan, especially when the summer monsoon was relatively weak. This result, together with the fact that the water vapor at the tree site was also derived from the Arabian Sea, implies that a weaker monsoon circulation enhances the flux of Arabian Sea moisture and reduces the flux of Bay of Bengal moisture to the study region. #------------------ # Funding_Agency # Funding_Agency_Name: Indian Space Research Organization-Geosphere Biosphere Programme, Government of India # Grant: ISRO-GBP-PRL:CCD881 #------------------ # Funding_Agency # Funding_Agency_Name: Japan Society for the Promotion of Science # Grant: 2310262, 23242047, 26244049 #------------------ # Funding_Agency # Funding_Agency_Name: Chinese Academy of Sciences # Grant: Pioneer Hundred Talents Program #------------------ # Site_Information # Site_Name: Manali # Location: Asia>Southcentral Asia>India # Country: India # Northernmost_Latitude: 32.2167 # Southernmost_Latitude: 32.2167 # Easternmost_Longitude: 77.2167 # Westernmost_Longitude: 77.2167 # Elevation: 2700 m #------------------ # Data_Collection # Collection_Name: Manali2017d18O # Earliest_Year: 1767 # Most_Recent_Year: 2008 # Time_Unit: CE # Core_Length: # Notes: #------------------ # Species # Species_Name: Abies pindrow # Common_Name: Himalayan silver fir # Tree_Species_Code: ABPI #------------------ # Chronology_Information # Chronology: # #----------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: one per line, shortname-tab-variable components (what, material, error, units, seasonality, data type,detail, method, C or N for Character or Numeric data, free text) # ## age_CE age, , , year CE, , , , ,N, ## d18OcellVSMOW delta18O, cellulose, , per mil VSMOW, annual, tree ring, , ,N, # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_CE d18OcellVSMOW 1767 31.25 1768 31.41 1769 27.95 1770 28.73 1771 28.67 1772 28.18 1773 31.31 1774 30.83 1775 27.23 1776 27.40 1777 28.74 1778 28.62 1779 31.75 1780 29.91 1781 30.43 1782 32.49 1783 33.97 1784 33.88 1785 31.36 1786 30.46 1787 30.72 1788 30.14 1789 26.99 1790 31.11 1791 28.57 1792 31.00 1793 31.71 1794 32.68 1795 29.81 1796 29.22 1797 27.94 1798 28.40 1799 28.29 1800 28.86 1801 28.05 1802 30.37 1803 31.40 1804 32.94 1805 30.26 1806 30.06 1807 27.52 1808 29.43 1809 29.84 1810 29.36 1811 28.78 1812 31.38 1813 33.14 1814 30.54 1815 29.52 1816 29.96 1817 28.44 1818 26.74 1819 27.66 1820 28.39 1821 31.11 1822 26.76 1823 28.52 1824 30.45 1825 31.50 1826 28.42 1827 30.61 1828 28.50 1829 29.99 1830 28.21 1831 30.49 1832 27.98 1833 33.50 1834 28.54 1835 28.31 1836 28.60 1837 30.82 1838 31.36 1839 30.97 1840 31.83 1841 30.98 1842 32.43 1843 30.42 1844 29.75 1845 30.07 1846 30.24 1847 30.59 1848 32.36 1849 31.64 1850 31.46 1851 29.70 1852 28.53 1853 29.34 1854 29.42 1855 29.15 1856 30.66 1857 28.50 1858 31.14 1859 30.74 1860 31.96 1861 30.75 1862 28.28 1863 29.16 1864 30.93 1865 31.21 1866 28.67 1867 30.29 1868 31.09 1869 30.80 1870 30.60 1871 29.26 1872 29.16 1873 31.86 1874 28.75 1875 30.19 1876 29.36 1877 31.09 1878 28.42 1879 30.24 1880 30.78 1881 27.90 1882 28.53 1883 30.06 1884 30.22 1885 28.74 1886 30.12 1887 30.44 1888 30.33 1889 28.29 1890 30.12 1891 29.83 1892 32.67 1893 26.52 1894 26.52 1895 29.05 1896 30.81 1897 29.40 1898 31.14 1899 32.40 1900 30.56 1901 31.20 1902 32.81 1903 31.26 1904 31.10 1905 30.88 1906 30.08 1907 30.10 1908 31.20 1909 28.78 1910 28.82 1911 30.79 1912 29.47 1913 29.38 1914 28.75 1915 30.01 1916 30.89 1917 28.58 1918 30.28 1919 29.56 1920 30.19 1921 33.61 1922 30.82 1923 30.12 1924 30.50 1925 28.30 1926 29.52 1927 29.50 1928 30.82 1929 30.80 1930 29.62 1931 30.97 1932 31.11 1933 27.37 1934 29.91 1935 29.98 1936 29.62 1937 29.93 1938 30.11 1939 32.10 1940 31.88 1941 31.82 1942 30.47 1943 28.93 1944 29.52 1945 28.86 1946 29.87 1947 32.64 1948 28.39 1949 29.96 1950 28.66 1951 30.21 1952 29.87 1953 30.40 1954 31.13 1955 28.13 1956 27.00 1957 27.24 1958 29.45 1959 28.66 1960 31.31 1961 28.95 1962 30.62 1963 29.62 1964 27.88 1965 30.13 1966 31.46 1967 28.51 1968 29.33 1969 32.67 1970 30.99 1971 29.80 1972 31.09 1973 30.46 1974 32.22 1975 28.90 1976 28.81 1977 28.70 1978 27.74 1979 30.18 1980 29.49 1981 30.43 1982 30.06 1983 28.87 1984 31.03 1985 32.23 1986 30.63 1987 33.58 1988 32.26 1989 30.08 1990 30.26 1991 31.39 1992 29.11 1993 29.95 1994 29.59 1995 29.76 1996 29.18 1997 30.00 1998 28.84 1999 30.05 2000 30.31 2001 31.43 2002 33.35 2003 30.28 2004 33.77 2005 28.99 2006 30.89 2007 30.78 2008 30.63