Newlyn (Cornwall) Site History
History Summary
| Station name | Newlyn |
|---|---|
| Country | England U.K. |
| Latitude of measuring point | 50° 06' 10.8" N |
| Longitude of measuring point | 05° 32' 33.9" W |
| OS grid ref. of measuring point | SW 4676 2856 |
| Datum reference | All data refer to Admiralty Chart Datum (ACD) |
| Time reference | GMT (hours 00-23) |
| Contributor | Tide Gauge Inspectorate (TGI), Proudman Oceanographic Laboratory, Joseph Proudman Building, 6 Brownlow Street, Liverpool, L3 5DA, U.K. |
| Instrument type | 1915 - Cary Porter float gauge operated by Ordnance Survey. 1983 - DATARING system installed with full tide pressure point. Cary Porter gauge removed. Munro float gauge installed. 1996 - Mid tide pressure point installed. |
| Site of measuring point | The measuring points are located on the seaward side of South pier behind the lighthouse |
| Position of tide gauge building | SW 4676 2856 - The Tidal Observatory is located at the end of South Pier, Newlyn next to the lighthouse |
| Observational period | 1915-2006 |
Benchmark descriptions
| Benchmark | OS grid ref. | Description | Height above ODN (m) |
|---|---|---|---|
| TGBM | SW 4676 2855 | OSBM bolt inside tidal obs. adjacent to well | 4.751 |
| Aux1 | SW 4673 2851 | Fl Br 1565 wall S Pier NW face 17.8M SW | 5.279 |
| Aux2 | SW 4659 2841 | Fl Br 1520 wall SE side of S Pier Rd NW face | 5.308 |
| Aux3 | |||
| Admiralty Chart Datum (Newlyn) | -3.05 |
Ordnance Datum Newlyn (ODN) is based on mean sea level at Newlyn between 1915 and 1921 (inclusive).
Datum Information
See document 83297
Levelling
The benchmarks were incorporated into the OS levelling network in 1960. Benchmarks were reconfirmed by the OS annually between 1960 to 1965 (inclusive) and from 1980 onwards; and every 6 months between 1966 and 1979. The table below shows tide gauge zero (TGZ) relative to ODN and TGZ relative to the TGBM calculated from an average of mean well soundings.
| Year | TGZ relative to ODN (m) | TGZ relative to TGBM (m) |
|---|---|---|
| 1918 | - | -8.08 |
| 1960 | -3.29 | -8.04 |
| 1961 | -3.29 | -8.04 |
| 1962 | -3.29 | -8.04 |
| 1963 | -3.28 | -8.03 |
| 1964 | -3.29 | -8.04 |
| 1965 | -3.29 | -8.04 |
| 1966 | -3.29 | -8.04 |
| 1967 | -3.29 | -8.04 |
| 1968 | -3.30 | -8.05 |
| 1969 | -3.30 | -8.05 |
| 1970 | -3.30 | -8.05 |
| 1971 | -3.30 | -8.05 |
| 1972 | -3.31 | -8.06 |
| 1973 | -3.31 | -8.06 |
| 1974 | -3.31 | -8.06 |
| 1975 | -3.31 | -8.06 |
| 1976 | -3.30 | -8.05 |
| 1977 | -3.30 | -8.05 |
| 1978 | -3.30 | -8.05 |
| 1979 | -3.30 | -8.05 |
| 1980 | -3.30 | -8.05 |
| 1981 | -3.32 | -8.07 |
| 1982 | -3.32 | -8.07 |
| 1983 | -3.31 | -8.06 |
| 1984 | -3.05 | -7.80 |
| 1985 | -4.713 | -9.463 |
All data now refer to Admiralty Chart Datum (ACD). The following years have been altered (see table below).
| Period | Correction Applied (m) |
|---|---|
| 1915-1967 | -0.61 |
| 1968-1981 | +0.18 |
| 1982 | -0.27 |
| 1983 | -0.26 |
| 1985 | -1.663 |
A gap in the data between 1000h 21 May 1915 and 2000h 22 May 1915 has been filled by interpolation.
Quality Assessment
All data have been compared with the current Harmonic Constants library, and residuals checked. Records have been visually inspected for spikes, datum shifts and timing errors.
- ASLVZZ01 = Sea Level, Unspecified Method (metres)
- ASLVBG01 = Bubbler, Sea Level (metres)
- ASLVBG02 = Bubbler, Sea Level (metres)
- ASLVBH01 = Bubbler, Half Tide (metres)
- TEMPPR01 = Temperature (°C)
Please Note: The Completeness index has been calculated for the primary channel only. Where there are multiple channels, the primary channel is ASLVBG02.
| Period | Parameter | Missing data | Suspect data | Completeness index (%) | Sample interval |
|---|---|---|---|---|---|
| 1915 | ASLVZZ01 | 001-112 | 123-130,149,158-165,220-228,250-260,275-301,305-318 | 69 | 60 minutes |
| 1916 | ASLVZZ01 | None | 052-058,061-069,072-081,111-115,119-122,159-164,166-175,195-220,253-276,282-307,317-338,342-343,360-361 | 100 | 60 minutes |
| 1917 | ASLVZZ01 | None | 021-030,121-127,224-232,243-246,262-267,271-277,286-287,355 | 100 | 60 minutes |
| 1918 | ASLVZZ01 | None | 027-035,085-097,100-106,203-210,214-224,229-239,248-274,289-300,317-337,344-345 | 100 | 60 minutes |
| 1919 | ASLVZZ01 | None | 006-013,056-062,078-083,091-097,100-103,105-111,118-124,129-136,174-181,196-202,235-237,248-255,273- 275,278-286,308-316 | 100 | 60 minutes |
| 1920 | ASLVZZ01 | None | 009-013,068-071 | 100 | 60 minutes |
| 1921 | ASLVZZ01 | None | 258-261,331-335,342-354 | 100 | 60 minutes |
| 1922 | ASLVZZ01 | None | 001-005,017-034,037-044,066-074,083-090,098-105,130-135,157-171,206,208-209,211,221,226-230,233-240,245-260,268-273,283-285,289-298,310 | 100 | 60 minutes |
| 1923 | ASLVZZ01 | None | 062-066,072-078,088-092,123-124,143-155,164-174,224,319,323-331 | 100 | 60 minutes |
| 1924 | ASLVZZ01 | None | 050-060,116-119,171-175,180-182,208,221-222,244-248,291-294,299-306,343-349 | 100 | 60 minutes |
| 1925 | ASLVZZ01 | None | None | 100 | 60 minutes |
| 1926 | ASLVZZ01 | None | 081-088,097,160-164,167,182,242,304-309,331-334 | 100 | 60 minutes |
| 1927 | ASLVZZ01 | None | 012-014,070-073,081-085,091-094,097-101,174,183,231-234,254-255,344-346,360-364 | 100 | 60 minutes |
| 1928 | ASLVZZ01 | None | 021,029,034,041,058-060,076-081,085-087,089-091,107-108,112-115,135,185,200-203,217-218,270-273,290-292,294-305,356-357,366 | 100 | 60 minutes |
| 1929 | ASLVZZ01 | None | 001-009,011-014,042-047,059,068-072,126,152-154,158-161,221-223,289-291,336-343 | 100 | 60 minutes |
| 1930 | ASLVZZ01 | None | 040-041,049,053-055,059,066,072-073,080,082-090,111-115,124,137,178-186,211,224-225,227-229,265-275,279-282,292-295,319-327,332-334 | 100 | 60 minutes |
| 1931 | ASLVZZ01 | None | 003-015,048-051,059-060,164-170,301-308,312 | 100 | 60 minutes |
| 1932 | ASLVZZ01 | None | 044-048,052-064,105-113,118-119,134-138,165-168,200-205,217,227-239,256-262,327,334-339,340-344,347-354 | 100 | 60 minutes |
| 1933 | ASLVZZ01 | None | 001-003,011,020-030,042-044,068-072,075-077,094-099,130-135,201-205,217-227,247-252,272-283,314-318,348 | 100 | 60 minutes |
| 1934 | ASLVZZ01 | None | 011,019-024,043-056,063,065,073,099,102,103,109,113,144-155,182-190,204-207,220-228,310-312,353-354,356 | 100 | 60 minutes |
| 1935 | ASLVZZ01 | None | 033-036,060,068,074,086-096,111-119,140-147,169-174,181-185,283-285,292-294,313-315,335,339-343,345,357-358 | 100 | 60 minutes |
| 1936 | ASLVZZ01 | None | 039-045,051-055,303-314,358-363 | 100 | 60 minutes |
| 1937 | ASLVZZ01 | None | 028-032,075-080,233-235,257,301-305,320-326 | 100 | 60 minutes |
| 1938 | ASLVZZ01 | None | 006-011,152-157,173-178,278,315-317,329,343-346,348-353 | 100 | 60 minutes |
| 1939 | ASLVZZ01 | None | 004-007,014-015,018-020,029-031,055-058,060-062,090-098,118-125,220-233,302-307,361-363 | 100 | 60 minutes |
| 1940 | ASLVZZ01 | None | 001-004,013-017,023-033,034-035,042-050,057-064,076,084-092,109-117,273-282,284-285,298-309,326-329,354-362 | 100 | 60 minutes |
| 1941 | ASLVZZ01 | None | 003-006,012-020,022-026,030-031,067-069,071-073,096-102,174-177,225,238-247,262-264,287-298,315-322,324-328,333-341,345-365 | 100 | 60 minutes |
| 1942 | ASLVZZ01 | None | 008-012,030-036,060-070,086-106,117-120,131-133,157-163,195-201,251-257,281-283,308-314,346-352,356-365 | 100 | 60 minutes |
| 1943 | ASLVZZ01 | None | 028-034,086-088,162-165,198-200,248-251,262-267,273,277-280,290-295,337-340,352-353 | 100 | 60 minutes |
| 1944 | ASLVZZ01 | None | 001-004,033-036,054,085,099-101,104-105,122-129,132,189-213,331-337,359-365 | 100 | 60 minutes |
| 1945 | ASLVZZ01 | None | 015-019,022-029,044-051,089,106-113,157-163,207-210,215-218,235-239,264-269,288-300,317-324,348-355 | 100 | 60 minutes |
| 1946 | ASLVZZ01 | None | 096-098,145-149,245-250,256-259,263-268,282-293 | 100 | 60 minutes |
| 1947 | ASLVZZ01 | None | 079-083,088,090,111-113,120-123,128-133,149-151,182-188,197-202,209,212-216,225-230,232-237,240,300-307,314-321,332-349,356-363 | 100 | 60 minutes |
| 1948 | ASLVZZ01 | None | 001-005,035-040,047-061,179,189,194-200,208,212-217,219,224,226,246-254,256-271,285-287,301-307,329-339,340-348,351-362 | 100 | 60 minutes |
| 1949 | ASLVZZ01 | None | 001-003,013-017,018-021,073,085-087,128-136,157-163,169-171,174-179,180-191,208-213,238-241,256-259,261-265,267-269,281-284,292-297,343-352,354-360 | 100 | 60 minutes |
| 1950 | ASLVZZ01 | None | 003-016,019-023,031-044,058-078,087-093,104-107,115-121,198-205,222,237-246,254-258,283-290,308-314,330,340-345,354-362 | 100 | 60 minutes |
| 1951 | ASLVZZ01 | None | 001-008,017-022,024-032,036-044,046-050,056-064,074-078,086-092,105-113,126-126,156-162,166-170,177-197,215-218,220-225,232-240,259-263,267-270,277-284,296-302,315-330,354-359 | 100 | 60 minutes |
| 1952 | ASLVZZ01 | None | 025-031,046-050,088-091,094-098,112-121,123-124,126,280,282-287,295,302-310,312-318,338-346,364-366 | 100 | 60 minutes |
| 1953 | ASLVZZ01 | None | 001-014,015-023,027,042-050,070-073,082-089,098-103,149-163,173-176,190-191,217-229,240-243,264-267,313-316,362-365 | 100 | 60 minutes |
| 1954 | ASLVZZ01 | None | 001-004,035-039,042-045,067-081,120-122,134-137,148-151,154-158,182-186,212-213,215,219,226-231,239-242,262-267,272-276,283-289,296-301,305,312-323,358-361 | 100 | 60 minutes |
| 1955 | ASLVZZ01 | None | 001-012,054-056,059-061,072,091,098-102,106-111,120,125-128,136-146,150,157-160,164-168,182-205,208,211-216,218-220,227-229,231-238,244-251,254-260,269-274,280-290,304-308,310-315,318-321,325-330,332-344,346-349,353-358,360,364-365 | 100 | 60 minutes |
| 1956 | ASLVZZ01 | None | 001-006,009-012,037-049,055,059-061,072-085,090-093,100-103,105-116,118-122,128-132,135-137,140-143,149-151,159-173,177-179,180-182,189-194,195-202,204-208,212-213,219-224,233-236,247-252,259,261-264,274-282,288-292,306-314,324-329,331-335,338-343,345-348,352-354,356-366 | 100 | 60 minutes |
| 1957 | ASLVZZ01 | None | 001-004,006-007,011-019,021-024,027-030,035,042-044,046-051,056-058,063-068,070-082,101-107,116-117,119-121,132-138,140-142,145-150,154-159,161-170,175-178,193-198,200-203,207-213,224-226,237-239,241-246,256,258-269,283-287,293-302,315-329,332-339 | 100 | 60 minutes |
| 1958 | ASLVZZ01 | None | 033-045,059-069,081-087,090-100,102-112,136-141,146-152,174-178,181-184,188-190,202-209,211-218,223-227,230-234,244-246,255,258-259,265-267,270-276,279-289,302-306,308-319,322-334,337-342,358-363 | 100 | 60 minutes |
| 1959 | ASLVZZ01 | None | 012-018,025-038,048-063,065-071,079-083,089-090,097-117,143-145,166-171,173-176,185-191,194-199,201-204,208-211,215-220,222-226,229-232,236-239,249-253,257-258,264-280,283,285-315,327-334,341-348,356-358 | 100 | 60 minutes |
| 1960 | ASLVZZ01 | None | 001-019,038-041,058-061,067-080,102-110,116-119,123-125,130-135,137-141,155-158,160-169,179-203,210-215,231-235,250-253,263-281,286-286,288-297,299-302,306-314,319-329,333,347-354 | 100 | 60 minutes |
| 1961 | ASLVZZ01 | None | 001-016,051-053,065-069,072-078,095-098,100-104,135-142,149-152,156-159,161-168,170-173,177-180,186-190,198-200,205-208,212-215,236-240,243,247,253-257,265-279,280-285,289-292,309-326,331-339,352-362 | 100 | 60 minutes |
| 1962 | ASLVZZ01 | None | 008-015,064-068,120-127,155-156,170-172,178-183,232-239,260-263,265-275,288-291,301-311,316-326,329-337,341-352 | 100 | 60 minutes |
| 1963 | ASLVZZ01 | None | 001-012,033-045,049-058,062-075,083,089-096,112-115,119-129,133-144,147-151,154-156,161,167-173,175-177,189-199,201-206,215-229,231-236,245-250,256-262,272-286,294-296,300-311 | 100 | 60 minutes |
| 1964 | ASLVZZ01 | None | 006-014,024-030,048-055,064-066,073-081,089-090,092-094,099-116,128-133,139-141,146-154,163-165,187-190,194-197,201-205,214-217,235-241,249-265,289-296,317-319,321-322,349-356 | 100 | 60 minutes |
| 1965 | ASLVZZ01 | None | 010-012,014-015,017,028-034,040,046-049,050-053,061-064,066-071,079-088,091-093,102-103,109-111,115-117,120-122,148-149,151-153,164-167,207,214-216,226-232,235-236,242-245,266-271,276-284,291-293,311,338-342,363 | 100 | 60 minutes |
| 1966 | ASLVZZ01 | None | 001-003,017-022,027-027,031,033-043,047-059,065-072,074-081,094-102,192-196,199-204,285-292 | 100 | 60 minutes |
| 1967 | ASLVZZ01 | None | 002-011,032-034,050-051,055-057,059-062,083-092,099,135,139-144,191-200,247-251,263,271-276,300,304-309,312,329-331 | 100 | 60 minutes |
| 1968 | ASLVZZ01 | None | 046-060,069-071,096-104,127-138,173-177,182-196,199-207,344-352 | 100 | 60 minutes |
| 1969 | ASLVZZ01 | None | 034-041,094-097,102,117-123,146-153,168-170,190-209,248-250,278-287,306-310,337-340,351-363 | 100 | 60 minutes |
| 1970 | ASLVZZ01 | None | 007-012,023-026,103-106,151-161,181-187,292-299 | 100 | 60 minutes |
| 1971 | ASLVZZ01 | None | 013-020,025-031,198-207,285-288,361-365 | 100 | 60 minutes |
| 1972 | ASLVZZ01 | None | 026-031,044-052,068-070,159-163,189-195,199-200,207-213,217-220,237-241,244-248,250-253,261-269,275-279,290-294 | 100 | 60 minutes |
| 1973 | ASLVZZ01 | None | 034-038,061-064,068-071,121-125,135-139,195-198,284-288,297-300,312-317 | 100 | 60 minutes |
| 1974 | ASLVZZ01 | None | 002-007,202-204,229-233,284-292 | 100 | 60 minutes |
| 1975 | ASLVZZ01 | None | 027-049,058-063,071-079,111-116,118-121,177-181,217-229,244-255,305-310,320-325,330-336 | 100 | 60 minutes |
| 1976 | ASLVZZ01 | None | 015-037,044-054,061-068,071-083,159-163,180-194,241-250,262-275,292-299,321-330,347-361 | 100 | 60 minutes |
| 1977 | ASLVZZ01 | None | 089-099,132-139,162-167,177-181,204-206,220-227,308-311,335-339 | 100 | 60 minutes |
| 1978 | ASLVZZ01 | None | 009-014,083-091,093-102,109-114,121-128,138-146,149-161,167-170,189-196,247-252,286-288,309-311,333-336,338-347 | 100 | 60 minutes |
| 1979 | ASLVZZ01 | None | 039-044,088-092,106-109,111-117,120-127,140-145,171-181,190-192,210,218-223,239-244,247-252,336-340,344 | 100 | 60 minutes |
| 1980 | ASLVZZ01 | None | 003-009,049,077-084,101-102,160-169,206-213,215-224,225-230,233-243,317-322 | 100 | 60 minutes |
| 1981 | ASLVZZ01 | None | 040-054,077-085,090-099,119-140,179-184,224-231 | 100 | 60 minutes |
| 1982 | ASLVZZ01 | None | 107-117,172-179,284-285 | 100 | 60 minutes |
| 1983 | ASLVZZ01 | 319-322 | 119-125,127-138,233,304-312,365 | 99 | 60 minutes |
| 1984 | ASLVBG02 | 001-225,234-237,241-243,344-346 | None | 37 | 60 minutes |
| 1985 | ASLVBG02 | 316-365 | None | 86 | 60 minutes |
| 1986 | ASLVBG02 | 017,171-205 | None | 90 | 60 minutes |
| 1987 | ASLVBG02 | None | None | 100 | 60 minutes |
| 1988 | ASLVBG02 | None | None | 100 | 60 minutes |
| 1989 | ASLVBG02 | None | None | 100 | 60 minutes |
| 1990 | ASLVBG02 | None | None | 100 | 60 minutes |
| 1991 | ASLVBG02 | 294-297,321-324 | None | 98 | 60 minutes |
| 1992 | ASLVBG02 | 153-154 | None | 99 | 60 minutes |
| 1993 | ASLVZZ01 | None | 099 | ||
| ASLVBG02 | None | None | 100 | 15 minutes | |
| 1994 | ASLVZZ01 | None | 189 | ||
| ASLVBG02 | None | None | 100 | 15 minutes | |
| TEMPPR01 | 305-335 | None | |||
| 1995 | ASLVZZ01 | None | 215-365 | ||
| ASLVBG02 | None | 297-304 | 100 | 15 minutes | |
| TEMPPR01 | 001-032,060-091,121-152 | 215-365 | |||
| 1996 | ASLVZZ01,TEMPPR01 | 102,261-264 | 001-261 | ||
| ASLVBG02 | 102,261-264 | 006-008,247 | 99 | 15 minutes | |
| ASLVBH01 | 001-264 | None | |||
| 1997 | ASLVZZ01,ASLVBG02 | 350-358 | 116-119,322 | 98 | 15 minutes |
| ASLVBH01 | 350-358 | 090,116-119,296-297,322 | |||
| 1998 | ASLVZZ01 | 286-288,314-316,349-361 | 163-170,205,206-210,251 252-256 | ||
| ASLVBG02 | 286-288,314-316,349-361 | None | 95 | 15 minutes | |
| ASLVBH01 | 286-288,314-316,349-361 | 056,057,058 | |||
| 1999 | ASLVZZ01 | 019-021,335-337 | 284-286 | ||
| ASLVBG02,ASLVBH01 | 019-021,335-337 | None | 98 | 15 minutes | |
| 2000 | ASLVZZ01 | 200-203 | 125,127 | ||
| ASLVBG02,ASLVBH01 | 200-203 | None | 99 | 15 minutes | |
| 2001 | ASLVZZ01 | 116,124-125 | 121-365 | ||
| ASLVBG02 | 116,124-125 | None | 99 | 15 minutes | |
| ASLVBH01 | 116-365 | None | |||
| 2002 | ASLVZZ01 | 066-100,114-115,317 | 001-066,100-114,116-134 | ||
| ASLVBG02 | 066-100,114-115,317 | None | 90 | 15 minutes | |
| ASLVBH01 | 001-317 | Half tide may be affected by wave action in places. | |||
| 2003 | ASLVZZ01 | 307 | 168,182,299 | ||
| ASLVBG02 | 307 | 007 | 99 | 15 minutes | |
| ASLVBH01 | 307 | None | |||
| 2004 | ASLVZZ01 | None | 070-071,142-159,185-219,297-336,341-346,348 | ||
| ASLVBG02 | None | 071 | 100 | 15 minutes | |
| ASLVBH01 | None | None | |||
| 2005 | ASLVZZ01 | 171,236-237 | 114-115,145-149,174,206,234,277,288-292 | ||
| ASLVBG02,ASLVBH01 | 171,236-237 | None | 99 | 15 minutes | |
| 2006 | ASLVZZ01 | 037,060-065,068,075-078,102-108,117,214-216,320 | 147,162-164,181,320-365 | ||
| ASLVBG02,ASLVBH01 | 037,060-065,068,075-078,102-108,117,214-216,320 | None | 95 | 15 minutes | |
| 2007 | ASLVBG02 | 129,192-212 | 217-311 | 94 | 15 minutes |
| 2008 | ASLVBG02 | 191 | 268-269,271-276 | 99 | 15 minutes |
| 2009 | ASLVBG02 | 70 | 317-318,337 | 99 | 15 minutes |
