# Touchan - Leid Mohamad Ouali - CDAT - ITRDB ALGE001 #----------------------------------------------------------------------- # 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 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/9723 # Description: NOAA Landing Page of study # Online_Resource: https://www1.ncdc.noaa.gov//pub/data/paleo/treering/chronologies/africa/alge001-noaa.crn # Description: Chronology - NOAA Template File # # Original_Source_URL: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/africa/alge001.crn # Description: Chronology - Tucson Decadal File # # Archive: Tree Ring # # Dataset_DOI: # # Parameter_Keywords: ring width #------------------- # Contribution_Date # Date: 2010-10-20 #------------------- # File_Last_Modified_Date # Date: 2018-12-12 #------------------- # Title # Study_Name: Touchan - Leid Mohamad Ouali - CDAT - ITRDB ALGE001 #------------------- # Investigators: Touchan, R. #------------------- # Description_Notes_and_Keywords # Description: NOAA Template Chronology file added 2018-12-12. #------------------- # Publication # Authors: Ramzi Touchan, Kevin J. Anchukaitis, David M. Meko, Said Attalah, Christopher Baisan, Ali Aloui # Journal_Name: Climate Dynamics # Published_Title: Spatiotemporal drought variability in northwestern Africa over the last nine centuries # Published_Date_or_Year: 2011 # Volume: 37 # Pages: 237-252 # Report_Number: # DOI: 10.1007/s00382-010-0804-4 # Full_Citation: # Abstract: Changes in precipitation patterns and the frequency and duration of drought are likely to be the feature of anthropogenic climate change that will have the most direct and most immediate consequences for human populations. The latest generation of state-of-the-art climate models project future widespread drying in the subtropics. Here, we reconstruct spatially-complete gridded Palmer drought severity index values back to A.D. 1179 over Morocco, Algeria, and Tunisia. The reconstructions provide long-term context for northwest African hydroclimatology, revealing large-scale regional droughts prior to the sixteenth century, as well as more heterogeneous patterns in sixteenth, eighteenth, and twentieth century. Over the most recent decades a shift toward dry conditions over the region is observed, which is consistent with general circulation model projections of greenhouse gas forced enhanced regional subtropical drought. #------------------- # Site_Information # Site_Name: Leid Mohamad Ouali # Location: Algeria # Northernmost_Latitude: 36.45 # Southernmost_Latitude: 36.45 # Easternmost_Longitude: 4.1 # Westernmost_Longitude: 4.1 # Elevation: 1520 #------------------- # Data_Collection # Collection_Name: ALGE001 # Earliest_Year: 1697 # Most_Recent_Year: 2005 # Time_Unit: AD # Notes: #------------------- # Species # Species_Name: Cedrus atlantica (Endl.) Manetti ex Carriere # Common_Name: Atlantic cedar # Tree_Species_Code: CDAT #------------------- # Chronology_Information # Chronology: #--------------------- # Variables # variables format: shortname var components: what,material,error,units,season,archive,detail,method, C or N for Char or Numeric data,additional information ## age_CE age,,,year Common Era,,tree ring,,,N, ## trsgi tree ring standardized growth index,,,,,tree ring,composited,standard,N, ## numsamp number of samples,,,count,,tree ring,,,N, # #-------------------- # Data: # Missing_Values: -999 age_CE trsgi numsamp 1697 870 1 1698 674 1 1699 714 1 1700 713 1 1701 865 1 1702 1135 1 1703 1207 1 1704 1050 1 1705 853 1 1706 940 1 1707 1021 1 1708 1017 1 1709 1187 1 1710 1007 1 1711 1318 1 1712 996 1 1713 941 1 1714 1103 1 1715 783 1 1716 942 1 1717 894 1 1718 1038 1 1719 1003 1 1720 825 1 1721 1118 1 1722 592 1 1723 1321 1 1724 1393 1 1725 1197 1 1726 1098 1 1727 936 1 1728 1420 1 1729 878 1 1730 950 1 1731 772 1 1732 981 1 1733 836 1 1734 931 1 1735 1196 2 1736 1199 2 1737 908 2 1738 799 2 1739 959 2 1740 1138 2 1741 1220 2 1742 1148 2 1743 1437 2 1744 1221 2 1745 1073 2 1746 785 2 1747 966 2 1748 868 2 1749 1086 2 1750 1244 3 1751 948 3 1752 1217 3 1753 1426 3 1754 1339 3 1755 1186 3 1756 737 3 1757 994 3 1758 1010 3 1759 970 3 1760 1099 3 1761 1072 4 1762 1067 4 1763 1141 4 1764 1130 4 1765 1149 4 1766 1088 6 1767 868 6 1768 958 6 1769 913 6 1770 906 6 1771 889 6 1772 891 6 1773 807 6 1774 714 6 1775 803 6 1776 1047 6 1777 1223 6 1778 1071 6 1779 989 7 1780 845 7 1781 1134 7 1782 750 7 1783 922 7 1784 895 7 1785 873 7 1786 595 7 1787 714 7 1788 863 7 1789 1086 7 1790 1420 7 1791 1207 7 1792 1015 8 1793 1112 8 1794 1338 8 1795 1388 9 1796 1266 9 1797 1408 9 1798 1095 10 1799 1035 10 1800 892 10 1801 752 10 1802 796 10 1803 385 10 1804 522 10 1805 752 11 1806 1019 11 1807 1055 11 1808 1073 11 1809 1035 11 1810 1195 11 1811 951 11 1812 882 11 1813 1073 11 1814 1022 11 1815 1138 11 1816 1056 11 1817 252 11 1818 389 12 1819 500 12 1820 586 12 1821 632 12 1822 672 13 1823 624 13 1824 762 13 1825 978 13 1826 1088 13 1827 1134 13 1828 1019 13 1829 1451 13 1830 1628 13 1831 1382 13 1832 1354 13 1833 1599 13 1834 1438 14 1835 1488 14 1836 1240 14 1837 1144 14 1838 1202 14 1839 1030 14 1840 852 14 1841 832 14 1842 727 14 1843 809 14 1844 924 14 1845 1070 15 1846 1178 15 1847 1307 16 1848 1107 16 1849 1083 16 1850 1361 16 1851 1308 16 1852 1095 16 1853 1022 16 1854 1145 16 1855 811 16 1856 766 16 1857 1091 16 1858 229 16 1859 312 16 1860 480 16 1861 719 16 1862 934 16 1863 963 16 1864 1086 16 1865 1034 16 1866 783 16 1867 673 17 1868 866 17 1869 955 17 1870 943 17 1871 838 18 1872 918 18 1873 1038 18 1874 1088 18 1875 826 18 1876 820 19 1877 643 19 1878 825 19 1879 818 19 1880 1008 19 1881 1052 19 1882 1003 19 1883 1015 19 1884 1156 19 1885 945 19 1886 945 19 1887 836 19 1888 962 19 1889 1047 19 1890 1044 19 1891 1016 19 1892 1026 20 1893 998 20 1894 892 20 1895 995 20 1896 979 20 1897 890 20 1898 1017 20 1899 1079 20 1900 936 21 1901 906 22 1902 874 22 1903 857 23 1904 772 24 1905 1046 24 1906 1005 25 1907 928 25 1908 1103 25 1909 1110 25 1910 1103 25 1911 1124 25 1912 1161 25 1913 1179 26 1914 1069 27 1915 1129 27 1916 1254 27 1917 1270 27 1918 1157 27 1919 1049 27 1920 1065 27 1921 1016 27 1922 840 27 1923 995 29 1924 942 29 1925 1214 29 1926 1113 29 1927 912 30 1928 839 30 1929 925 30 1930 882 30 1931 724 30 1932 802 30 1933 774 30 1934 811 30 1935 678 30 1936 806 31 1937 943 31 1938 898 32 1939 886 32 1940 1027 32 1941 995 32 1942 768 32 1943 780 32 1944 813 32 1945 903 32 1946 1094 32 1947 735 32 1948 1079 32 1949 1077 32 1950 1010 32 1951 1112 32 1952 1301 33 1953 1235 33 1954 1086 33 1955 1189 33 1956 1180 33 1957 1074 33 1958 1000 33 1959 1091 33 1960 1040 33 1961 832 33 1962 994 33 1963 1089 33 1964 1141 33 1965 905 33 1966 1172 33 1967 1149 33 1968 1155 33 1969 1133 33 1970 966 33 1971 766 33 1972 892 33 1973 862 33 1974 930 33 1975 883 33 1976 1180 33 1977 930 33 1978 922 33 1979 943 33 1980 1082 33 1981 998 33 1982 1038 33 1983 1119 33 1984 1160 33 1985 1250 33 1986 1098 33 1987 1012 33 1988 882 33 1989 922 33 1990 851 33 1991 794 33 1992 954 33 1993 866 33 1994 756 33 1995 899 33 1996 1218 33 1997 751 33 1998 1242 33 1999 939 33 2000 769 33 2001 927 33 2002 428 32 2003 1096 32 2004 1071 32 2005 1005 31