The CELTIC SEA (Irish : An Mhuir Cheilteach; Welsh : Y Môr Celtaidd;
Cornish : An Mor Keltek; Breton : Ar Mor Keltiek; French: La mer
Celtique) is the area of the
Atlantic Ocean off the south coast of
Ireland bounded to the east by Saint George\'s Channel ; other limits
Bristol Channel , the
English Channel , and the Bay of
Biscay , as well as adjacent portions of
Brittany . The southern and western boundaries are delimited by
the continental shelf , which drops away sharply. The Isles of Scilly
are an archipelago of small islands in the sea.
* 1 History
* 2 Limits
* 3 Seabed
* 4 Ecology of the Celtic
* 5 See also
* 6 References
* 7 External links
Sea takes its name from the Celtic heritage of the
bounding lands to the north and east. The name was first proposed by
E.W.L. Holt at a 1921 meeting in
Dublin of fisheries experts from
England, Wales, Ireland, Scotland and France. The northern portion of
this sea had previously been considered as part of Saint George\'s
Channel and the southern portion as an undifferentiated part of the
Southwest Approaches " to Britain . The need for a common name came
to be felt because of the common marine biology , geology and
hydrology . It was adopted in
France before being common in the
English-speaking countries; in 1957
Édouard Le Danois wrote, "the
Sea is hardly known even to oceanographers." It was
adopted by marine biologists and oceanographers, and later by
petroleum exploration firms. It is named in a 1963 British atlas,
but a 1972 article states "what British maps call the Western
Approaches , and what the oil industry calls the Celtic
the residents on the western coast don't refer to it as such."
There are no land features to divide the Celtic
Sea from the open
Atlantic Ocean to the south and west. For these limits, Holt suggested
the 200 fathom (366 m) marine contour and the island of
Ushant off the
tip of Brittany.
The definition approved by 1974 by the Hydrographer of the Royal Navy
for use in
Admiralty Charts was "bounded roughly by lines joining
Ushant, Land\'s End ,
Hartland Point ,
Lundy Island , St. Govan\'s
Head and Rosslare , thence following the Irish coast south to Mizen
Head and then along the 200-metre isobath to approximately the
latitude of Ushant."
International Hydrographic Organization
International Hydrographic Organization defines the limits of the
Sea as follows:
On the North. The Southern limit of the Irish
Sea , the South coast
of Ireland, thence from
Mizen Head a line drawn to a position
51°0′N 11°30′W / 51.000°N 11.500°W / 51.000; -11.500
On the West and South. A line from the position 51°0′N
11°30′W / 51.000°N 11.500°W / 51.000; -11.500 South to
49°N , thence to latitude 46°30'N on the Western limit of the Bay of
Biscay , thence along that line to Penmarch Point.
On the East. The Western limit of the
English Channel and the
Western limit of the
Bristol Channel .
The seabed under the Celtic
Sea is called the CELTIC SHELF, part of
the continental shelf of Europe. The northeast portion has a depth of
between 90m and 100m, increasing towards Saint George's Channel. In
the opposite direction, sand ridges pointing southwest have a similar
height, separated by troughs approximately 50m deeper. These ridges
were formed by tidal effects when the sea level was lower. South of
50° the topography is more irregular.
Oil and gas exploration in the Celtic
Sea has had limited commercial
Kinsale Head gas field supplied much of the Republic of
Ireland in the 1980s and 1990s.
ECOLOGY OF THE CELTIC SEA
Sea has a rich fishery with total annual catches of 1.8
million tonnes as of 2007.
Four cetacean species occur frequently in the area: minke whale ,
bottlenose dolphin , short-beaked common dolphin and harbor porpoise .
Formerly it held an abundance of marine mammals .
Wikimedia Commons has media related to CELTIC SEA .
Irish Conservation Box
* ^ C.Michael Hogan. 2011. Celtic Sea. eds. P.saundry &
C.Cleveland. Encyclopedia of Earth. National Council for Science and
the /environment. Washington DC.
* ^ A B C D Haslam, D. W. (Hydrographer of the
Royal Navy ) (29
March 1976). "It's the Celtic Sea—official".
The Times (59665). p.
15 (Letters to the Editor), col G.
* ^ Danois, Edouard Le (1957). Marine Life of Coastal Waters:
Western Europe. Harrap. p. 12.
* ^ Cooper, L. H. N. (2 February 1972). "In Celtic waters". The
Times (58391). p. 20; col G (Letters to the Editor).
* ^ The Atlas of
Great Britain and Northern Ireland. Clarendon Press
. 1963. pp. 20–21. ; cited in
Shergold, Vernon G. (27 January 1972). "Celtic Sea: a good name". The
Times (58386). p. 20 (Letters to the Editor); col G. * ^ Vielvoye,
Roger (24 January 1972). "Industry in the regions Striking oil in
Wales and West Country".
The Times (58383). p. 19; col A.
* ^ "Celtic Sea". Parliamentary Debates (Hansard) . 883. House of
Commons. 16 December 1974. col. 317W.
* ^ "Limits of Oceans and Seas, 3rd edition + corrections" (PDF).
International Hydrographic Organization. 1971. p. 42 . Retrieved 6
* ^ Hardisty, Jack (1990). The British Seas: an introduction to the
oceanography and resources of the north-west European continental
shelf. Taylor & Francis. pp. 20–21. ISBN 0-415-03586-4 .
* ^ European Union. "Celtic Seas". European Atlas of the Seas.
Archived from the original on 24 July 2015. Retrieved 13 March 2015.
* ^ Hammond, P.S.; Northridge, S.P.; Thompson, D.; Gordon, J.C.D.
(2008). "1 Background information on marine mammals for Strategic
Environmental Assessment 8" (PDF).
Sea Mammal Research Unit. Retrieved
13 March 2015.
* ^ Van Deinse, A.B.; Junge, G. C. A. (1936). "Recent and older
finds of the California grey whale in the Atlantic". Temminckia. 2:
* ^ Fraser, F.C. (1936). "Report on cetacea stranded on the British
Coasts from 1927 to 1932.". British Museum (Natural History) No. 11,
* Coccoliths in the