Amchitka Island Alaska 150 Year Corraline Algae Mg/Ca Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: Please cite original reference when using these data, plus the data file URL and date accessed. NAME OF DATA SET: Amchitka Island Alaska 150 Year Corraline Algae Mg/Ca Data LAST UPDATE: 4/2012 (Original receipt by WDC Paleo) CONTRIBUTORS: S. Hetzinger, J. Halfar, J.V. Mecking, N.S. Keenlyside, A. Kronz, R.S. Steneck, W.H. Adey and P.A. Lebednik IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2012-036 WDC PALEO CONTRIBUTION SERIES CITATION: Hetzinger, S., et al. 2012. Amchitka Island Alaska 150 Year Corraline Algae Mg/Ca Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2012-036. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: S. Hetzinger, J. Halfar, J.V. Mecking, N.S. Keenlyside, A. Kronz, R.S. Steneck, W.H. Adey and P.A. Lebednik. 2011. Marine proxy evidence linking decadal North Pacific and Atlantic climate. Climate Dynamics, Online First, 15 November 2011. DOI 10.1007/s00382-011-1229-4 ABSTRACT: Decadal- to multidecadal variability in the extra-tropical North Pacific is evident in 20th century instrumental records and has significant impacts on Northern Hemisphere climate and marine ecosystems. Several studies have discussed a potential linkage between North Pacific and Atlantic climate on various time scales. On decadal time scales no relationship could be confirmed, potentially due to sparse instrumental observations before 1950. Proxy data are limited and no multi- centennial high-resolution marine geochemical proxy records are available from the subarctic North Pacific. Here we present an annually-resolved record (1818-1967) of Mg/Ca variations from a North Pacific/Bering Sea coralline alga that extends our knowledge in this region beyond available data. It shows for the first time a statistically significant link between decadal fluctuations in sea-level pressure in the North Pacific and North Atlantic. The record is a lagged proxy for decadal- scale variations of the Aleutian Low. It is significantly related to regional sea surface temperature and the North Atlantic Oscillation (NAO) index in late boreal winter on these time scales. Our data show that on decadal time scales a weaker Aleutian Low precedes a negative NAO by several years. This atmospheric link can explain the coherence of decadal North Pacific and Atlantic Multidecadal Variability, as suggested by earlier studies using climate models and limited instrumental data. GEOGRAPHIC REGION: Northern Pacific PERIOD OF RECORD: 1818 - 1967 AD FUNDING SOURCES: Alexander von Humboldt Foundation (Feodor Lynen Fellowship), Deutsche Forschungsgemeinschaft (grants HA 3238/2-1. 2-2, KE 1471/2-1), Natural Sciences and Engineering Research Council of Canada Discovery Grant, Canadian Foundation for Innovation and Research, Ontario Research Fund. DATA FILE URLS: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hetzinger2011/hetzinger2011.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hetzinger2011/hetzinger2011.xls DESCRIPTION: 150 year Mg/Ca data from coralline alga collected near Amchitka Island, Aleutian Islands, Alaska. C. nereostratum is a long-lived, shallow-marine crustose coralline algae. Specimen AM-KR-80 8-69-14B collected in August 1969, 25 water depth, coralline algae, species: Clathromorphum nereostratum Sampling location: Kirlof Point, Amchitka Island, Alaska, 51°24.936'N, 179°17.976'E. DATA: Year Mg/Ca-norm Mg/Ca (ratio calculated using atom % of Mg and Ca) 1818 0.992077 0.138255 1819 1.451380 0.141898 1820 -0.053343 0.129964 1821 -1.472769 0.118706 1822 -0.263139 0.128300 1823 -0.400568 0.127210 1824 -0.230669 0.128557 1825 1.296126 0.140667 1826 0.440185 0.133878 1827 0.551602 0.134762 1828 0.701575 0.135951 1829 0.311719 0.132859 1830 -0.360684 0.127526 1831 0.067013 0.130918 1832 -0.719130 0.124683 1833 -1.176738 0.121054 1834 -0.707914 0.124772 1835 -0.962562 0.122752 1836 -1.159604 0.121189 1837 -0.582438 0.125767 1838 0.239482 0.132286 1839 -1.061821 0.121965 1840 -1.210373 0.120787 1841 -1.880324 0.115473 1842 -1.381762 0.119427 1843 -1.513064 0.118386 1844 -0.585501 0.125743 1845 -0.152254 0.129179 1846 0.397170 0.133537 1847 -0.475719 0.126614 1848 -0.238818 0.128493 1849 -0.237312 0.128505 1850 -0.504939 0.126382 1851 -0.384713 0.127335 1852 -0.101627 0.129581 1853 -0.625994 0.125422 1854 0.961545 0.138013 1855 -0.384987 0.127333 1856 0.666433 0.135673 1857 -1.352239 0.119662 1858 -1.017524 0.122316 1859 -0.651778 0.125217 1860 0.392530 0.133500 1861 0.131634 0.131431 1862 0.663130 0.135646 1863 0.410394 0.133642 1864 1.442348 0.141827 1865 -0.138108 0.129291 1866 -0.096423 0.129622 1867 1.403809 0.141521 1868 -0.512084 0.126325 1869 0.236906 0.132266 1870 0.924847 0.137722 1871 0.126342 0.131389 1872 0.786512 0.136625 1873 0.140351 0.131500 1874 -0.945335 0.122889 1875 -0.164342 0.129083 1876 0.213897 0.132083 1877 -0.117062 0.129458 1878 1.404650 0.141528 1879 1.297833 0.140681 1880 0.187631 0.131875 1881 0.262928 0.132472 1882 1.341611 0.141028 1883 -0.733452 0.124569 1884 0.369748 0.133319 1885 -0.390234 0.127292 1886 0.429284 0.133792 1887 -0.393736 0.127264 1888 1.219033 0.140056 1889 1.250553 0.140306 1890 -1.116944 0.121528 1891 -0.905060 0.123208 1892 1.219032 0.140056 1893 -0.812251 0.123944 1894 -0.584607 0.125750 1895 2.066572 0.146778 1896 0.177124 0.131792 1897 2.239928 0.148153 1898 0.175373 0.131778 1899 0.220902 0.132139 1900 -0.227381 0.128583 1901 0.016023 0.130514 1902 -1.389586 0.119365 1903 -0.579036 0.125794 1904 -0.684816 0.124955 1905 -1.332111 0.119821 1906 -1.349891 0.119680 1907 -2.665641 0.109244 1908 -0.246726 0.128430 1909 -1.262711 0.120372 1910 -0.191155 0.128871 1911 -2.004630 0.114487 1912 0.833922 0.137001 1913 -1.565905 0.117967 1914 -0.274783 0.128207 1915 -1.234980 0.120592 1916 -0.431681 0.126963 1917 0.308617 0.132835 1918 0.673461 0.135728 1919 -1.182656 0.121007 1920 1.195423 0.139868 1921 -0.591942 0.125692 1922 -0.458157 0.126753 1923 -0.849723 0.123647 1924 -0.004363 0.130352 1925 0.134374 0.131453 1926 0.945189 0.137884 1927 -0.653690 0.125202 1928 -0.189937 0.128880 1929 0.979353 0.138155 1930 -1.581373 0.117844 1931 0.792898 0.136676 1932 -1.318505 0.119929 1933 -1.598072 0.117712 1934 0.081946 0.131037 1935 -1.330754 0.119832 1936 1.547477 0.142661 1937 0.524427 0.134546 1938 1.147232 0.139486 1939 0.655776 0.135588 1940 -0.796826 0.124067 1941 0.527843 0.134573 1942 3.607543 0.159000 1943 0.365637 0.133287 1944 -0.229960 0.128563 1945 -0.186474 0.128908 1946 0.323987 0.132957 1947 -0.256594 0.128352 1948 -0.207013 0.128745 1949 0.541648 0.134683 1950 1.208820 0.139975 1951 -1.238306 0.120565 1952 -0.450259 0.126816 1953 0.454010 0.133988 1954 -0.540443 0.126100 1955 0.468149 0.134100 1956 0.772728 0.136516 1957 1.069661 0.138871 1958 0.647569 0.135523 1959 1.451184 0.141897 1960 2.875834 0.153196 1961 1.024444 0.138512 1962 1.550274 0.142683 1963 0.376754 0.133375 1964 1.527682 0.142504 1965 -0.763084 0.124334 1966 2.045846 0.146613 1967 -0.857826 0.123583