The Medieval Cultures of the Irish Sea and the North Sea

2019 ◽  
Keyword(s):  
North Sea ◽  
Irish Sea ◽  
The North ◽  
The North Sea ◽  
The Irish Sea

The medieval cultures of the Irish sea and the North Sea: Manannan and his neighbors [Book Review]

2019 ◽  
Vol 15 ◽  
pp. 142-144
Author(s):  
John Kennedy
Keyword(s):  
North Sea ◽  
Irish Sea ◽  
The North ◽  
The North Sea ◽  
The Irish Sea

Review(s) of: The medieval cultures of the Irish sea and the North Sea: Manannan and his neighbors, by MacQuarrie, Charles W., and Nagy, Joseph Falaky Nagy (eds), (Amsterdam: Amsterdam University Press, 2019) hardcover, 212 pages, 1 map, 4 figures, RRP euro99; ISBN 9789462989399.

Histriobdella homari on nephrops norvegicus from the irish sea and clyde sea area

1997 ◽  
Vol 77 (2) ◽  
pp. 557-559 ◽  
Author(s):  
R.P. Briggs ◽  
R.J.A. Atkinson ◽  
M. McAliskey ◽  
A. Rogerson
Keyword(s):  
North Sea ◽  
Irish Sea ◽  
English Channel ◽  
Southwestern Part ◽  
Nephrops Norvegicus ◽  
The North ◽  
The North Sea ◽  
The Irish Sea ◽  
Clyde Sea ◽  
Sea Area

Histriobdella homari is a polychaete annelid belonging to the Order Eunicida and Family Histriobdellidae. Histriobdella homari is normally found in the gill chambers or among the eggs of the lobster Homarus vulgaris from the English Channel (Roscoff) and in the southwestern part of the North Sea (George & Hartmann-Schroder, 1985). Two independent sightings of H. homari living on the pleopods of Nephrops norvegicus from the Irish Sea and Clyde Sea area are reported.

Sea shells record large biases from the marine bomb-14C curve in NW European seawater between the late 1960s and 2019

2020 ◽  
Author(s):  
Maxi Castrillejo ◽  
Christopher A. Richardson ◽  
Rob Witbaard ◽  
Rob Dekker ◽  
Caroline Welte ◽  
...  
Keyword(s):  
North Sea ◽  
Age And Growth ◽  
Irish Sea ◽  
Eastern Coast ◽  
Marine Biota ◽  
The North ◽  
Discharge Rates ◽  
The North Sea ◽  
The Irish Sea ◽  
Ambient Levels

<p>The Northeast Atlantic alone has received 1.2 PBq of <sup>14</sup>C as liquid and gaseous releases from European nuclear fuel reprocessing plants (NRPs) between the 1950s and present. The input of reprocessing-<sup>14</sup>C has the potential to elevate the regional <sup>14</sup>C content of seawater, sediments and marine biota above the ambient levels expected from the bomb-<sup>14</sup>C. Yet, a comprehensive assessment of the time evolution of F<sup>14</sup>C in seawater is still missing for the Northwestern European Seas. Moreover, the least-well studied period of time (1990’s onward) corresponds to the largest liquid <sup>14</sup>C releases reported by the Sellafield and La Hague NRPs. In this study, we aim at better constraining the temporal changes of F<sup>14</sup>C between the late 1960s and 2019, and to delimit the area of influence of reprocessing discharges with regard to <sup>14</sup>C. To this end, we combine Accelerator Mass Spectrometry techniques and a novel archive of bivalve shells that inhabited the Irish Sea, the North Sea, Norway and the Bay of Biscay throughout the main period of reprocessing-<sup>14</sup>C discharge. The shells are made of aragonite, and thus, they can be used as an analogue of the past seawater F<sup>14</sup>C. The shell-based F<sup>14</sup>C data can be accurately placed in the temporal context because the animals have a known capture date and short lifespan of two years. The reconstructed F<sup>14</sup>C values vary between ~1 and ~3 after the 1970s. This range of F<sup>14</sup>C values is even larger than the one displayed by the atmospheric bomb peak (1 - 1.9). To investigate if the excess <sup>14</sup>C is related to the reprocessing releases, we use a simple box model that simulates the seawater F<sup>14</sup>C by mixing bomb and reprocessing-<sup>14</sup>C, as well as the naturally occurring <sup>12,14</sup>C. In shells from the southern North Sea, the F<sup>14</sup>C increases 0.1-0.4 above ambient levels after the mid-1990s in response to increased discharge rates of liquid <sup>14</sup>C from the La Hague plant. Similarly, the shells collected in the Irish Sea show two consecutive peaks in the mid-1990s (F<sup>14</sup>C ~ 2.0) and 2000s (F<sup>14</sup>C ~ 2.2) that can be attributed to peak discharge rates of liquid <sup>14</sup>C reported by Sellafield. The F<sup>14</sup>C in shells from the eastern coast of the UK and Norway are within the range of the ambient values, which indicates the expected rapid dilution of the reprocessing signal with open ocean waters. In previous studies, the bomb-<sup>14</sup>C marine curve has been used as a benchmark, among others, to estimate the age and growth rate of calcifying animals, to date marine sediments, and to investigate water mass mixing and circulation timescales. Given the biases from the marine bomb-<sup>14</sup>C curve unraveled by the shell data, we suggest that liquid releases from the NRPs should not be disregarded when applying <sup>14</sup>C as a chronological or circulation tool to marine samples collected in the Irish Sea and parts of the North Sea over the last 5 decades.</p>

scholarly journals The principal constituent of the tides in the English and Irish channels

1933 ◽  
Vol 231 (694-706) ◽  
pp. 29-53 ◽  
Keyword(s):  
Numerical Integration ◽  
North Sea ◽  
Irish Sea ◽  
English Channel ◽  
Dynamical Equations ◽  
Small Curvature ◽  
The North ◽  
Degree Of Separation ◽  
The North Sea ◽  
The Irish Sea

1. A chart of co-tidal and co-range lines for the North Sea was prepared at the Tidal Institute in the year 1923, and the methods then used have now been further developed and improved and applied to the English Channel, the Irish Sea, and their approaches. The methods used depend largely upon the known dynamical equations connecting the currents with the gradients of the elevations. If any assumption be made as to the values of the range of tide and the relative phases of the elevation and currents, then we can deduce from this information at one station, not only the directions of the co-tidal and co-range lines at that point, but also the degree of separation of the lines for any given unit of phase or range. This criterion, applied to speculative charts hitherto published, suffices at once either to verify or to condemn the charts. Again, without any assumptions at all, from the gradients at a number of stations on a line of small curvature, starting at a point at which the elevation is known, the elevations at all points along the line can be computed by simple methods of numerical integration.

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