QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated 18 Sep 2019 Station : Brest Latitude: 48 23.0N Country : France Longitude: 004 29.7W JASL # : 822A Time Meridian: GMT GLOSS # : 242 Originator #:103 NODC #: 74008401 Contributor : Université de La Rochelle CLDG/SONEL - Centre Littoral de Geophysique Avenue Michel Crepeau F-17042 LA ROCHELLE Cedex and Service Hydrographique et Oceanographique de la Marine (SHOM) B.P. 426 13 Rue du Chatellier 29200 Brest Cedex, France Originator : SONEL, SHOM Original Data: float: analog; others: digital Instrmnt Type: 1846-1993: float and stilling well; 1993-2004: acoustic gauge 29 Jun 2004-: radar Krohne BM100 (pulse type) Digitzd Intvl: float: one hour; other: 10 min Present Data : Hourly, daily, and monthly values obtained by: Hourly : float: one hour spot; radar: simple average of 2 min data from 1 sec samples centered on the hour Daily : 119-point convolution filter (Bloomfield, 1976) centered on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours Monthly: Simple average of all daily values; calculated if 7 or fewer days are missing Span of data : 04 Jan 1846 - 31 Dec 2018 Gaps > 1 mon : 31 May 1857 - 24 Nov 1859;20 Jan 1860 - 30 Apr 1860 31 Aug 1863 - 29 Feb 1864;31 Aug 1877 - 02 Oct 1877 31 Aug 1878 - 03 Oct 1878;31 May 1897 - 02 Aug 1897 31 May 1907 - 30 Jun 1907;31 Dec 1916 - 01 Feb 1916 31 Aug 1922 - 02 Oct 1922;01 Nov 1937 - 31 Dec 1938 30 Apr 1944 - 29 Sep 1952;17 Jul 1980 - 16 Aug 1980 23 Apr 2012 - 21 Sep 2012 Time Refernce: GMT (00-23 hours) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1846-2018 Refernce Levl: Repere A: repere no.1 NGF situe sur le polier est, pres de l'entree Nord du tunnel Repere A = 5.589m Repere B = 5.670m Repere C = 5.481m Repere D = 4.492m Repere F = 4.807m Repere G = 4.349m Cote par rapport au zero NGF Repere B: repere no.2 NGF situe a l'entree Sud du tunnel du chateau. Repere C: macaron no.0-o NGF scelle a droite de l'entree NW des souterrains du chateau. Repere D: rivet no.0-I NGF scelle sur le quai a droite de la passerelle d'acces au maregraphe. Repere G: echelle E3 - graduation 8.80m. Comment : The tidal analysis does not resolve all the harmonic constituents thus the residuals are noisy. Only the most extreme fluctuations in the residuals are noted below. Detailed documentation can be found from Pouvreau, Nicolas. These de Doctorat del Universit de la Rochelle. Trois cent ans de mesures maregraphiques en France: outils, methodes et tendances des composantes du niveau de la mer au port de Brest. Internet: "http://refmar.shom.fr/fr/c/document_library/ get_file?uuid=6e43e1a5-e637-4075-9cb5- 1d16583f9f89&groupId=10227". CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1846 99 none none 365 1847 95 1-21 none none 1848 100 none none none 1849 100 none none none 1850 100 none none none 1851 100 none none none 1852 95 20-39 none 20 1853 100 none none none 1854 100 none none none 1855 100 none none none 1856 100 none none none 1857 41 151-365 none none 1858 0 1-365 none none 1859 10 1-328 none none 1860 72 20-121 none none 1861 97 353-365 none none 1862 95 1-17 none none 1863 67 243-365 none none 1864 84 1-60 none 61 1865 100 none none 365 1866 100 none none none 1867 94 223-245 none none 1868 95 196-213 none none 1869 100 none none 45-46,58-59 1870 100 none none 32 1871 100 none none 218-220 1872 98 87-91,105-111 none none 1873 100 none none none 1874 97 120-132 none none 1875 100 none none none 1876 100 none none 125,363 1877 91 243-275 none none 1878 91 243-276 none none 1879 100 none none none 1880 100 none none none 1881 100 none none none 1882 100 none none none 1883 100 none none none 1884 100 none none none 1885 100 none none none 1886 100 none none none 1887 100 none none none 1888 100 none none none 1889 100 none none none 1890 100 none none none 1891 93 306-334 none none 1892 100 none none none 1893 100 none none none 1894 100 none none none 1895 100 none none none 1896 100 none none none 1897 83 151-214 none none 1898 100 none none 52,159-160 1899 100 none none none 1900 100 none none none 1901 100 none none none 1902 100 none none none 1903 100 none none none 1904 100 none none none 1905 100 none none none 1906 100 none none none 1907 92 151-181 (23)031-(06)032 121-122,267-268 1908 100 none none 122 1909 100 none (00)147-(07)147 none (23)243-(12)244 1910 96 109-122 none 78,91-93,98-100,352 1911 98 81-88 none none 1912 100 none none none 1913 100 none none none 1914 100 none (23)365-(14)001 none 1915 100 none none none 1916 100 none none none 1917 91 1-32 none 58-59 1918 100 none none none 1919 100 none none none 1920 99 259-263 none none 1921 100 none none none 1922 90 243-275,343-350 none none 1923 98 198-207 none none 1924 100 none none none 1925 100 none none none 1926 100 none none 210-213 1927 100 none none none 1928 100 none none none 1929 100 none none none 1930 100 none none none 1931 100 none none none 1932 100 none none none 1933 100 none none none 1934 100 none none none 1935 100 none none none 1936 100 none none none 1937 83 305-365 none none 1938 0 1-365 none none 1939 100 none none none 1940 98 175-184 none 183-184 1941 100 none none none 1942 100 none none none 1943 100 none none none 1944 33 121-366 none none 1945 0 1-365 none none 1946 0 1-365 none none 1947 0 1-365 none none 1948 0 1-366 none none 1949 0 1-365 none none 1950 0 1-365 none none 1951 0 1-366 none none 1952 25 1-273,310-312, none none 357-359 1953 100 none none 45-47,50 1954 100 none none 119 1955 100 none none 305 1956 100 none (00)142-(07)142 114,277-279 1957 100 none none none 1958 100 none none none 1959 100 none none none 1960 100 none none none 1961 100 none none 32-36,44,49,64,92, 297-299 1962 100 none none none 1963 100 none none 252,259-260 1964 100 none none none 1965 100 none none 166 1966 100 none none none 1967 100 none none 71 1968 100 none none none 1969 100 none none none 1970 100 none none none 1971 100 none none none 1972 100 none none none 1973 100 none none none 1974 100 none none none 1975 100 none none 251-254 1976 100 none none none 1977 100 none none none 1978 100 none none none 1979 100 none none 230-233,278-283,365 1980 87 11-27,41-44,199-229 none 241-244 1981 98 263-271 none none 1982 89 1-6,127-143,297-303, none 364 340-353 1983 100 none none 61 1984 100 none none none 1985 100 none none none 1986 100 none none none 1987 100 none none none 1988 100 none none none 1989 100 none none none 1990 100 none none none 1991 100 none none none 1992 100 none none none 1993 98 1-9 none none 1994 100 none none none 1995 100 none none none 1996 100 none none none 1997 100 none none none 1998 100 none none none 1999 100 none none none 2000 99 1-5 none none 2001 100 none none none 2002 100 none none none 2003 100 none none none 2004 100 none none none 2005 100 none none none 2006 100 none none none 2007 100 none none none 2008 100 none none none 2009 99 132-133 (11)336-(00)337 none 2010 100 none none none 2011 100 none none none 2012 99 360-361,363-365 (14)333-(00)334 2013 96 1-2,115-116,307-310, (14)204-(11)205 none 314-322 2014 100 none (02)264-(00)265 none 2015 100 none none none 2016 99 253-256 (05)144-(16)144 none (20)146-(05)147 (07)272-(18)272 2017 99 9-10 none none 2018 100 none none none