Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic Ocean

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Until now there has been no tool comparable to corals for reconstructing long term high-resolution geochemical time-series for the colder, higher-latitude oceans. In this thesis, the long-lived (+100 years) boreal mollusc (Bivalvia) Arctica islandica is shown to be practical for this purpose in the northern North Atlantic Ocean. The evidence, compiled here, demonstrates that the carbonate shell of this species faithfully records the ambient dissolved inorganic carbon`s (DIC) radiocarbon ({Delta}{sup 14}C) concentration and accurately reflects the ambient temperature in its stable oxygen isotope ({delta}{sup 18}O) composition. However, the stable carbon isotope ({delta}{sup 13}C) composition of the A. islandica shell likely ... continued below

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206 p.

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Weidman, C.R. September 1, 1995.

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Description

Until now there has been no tool comparable to corals for reconstructing long term high-resolution geochemical time-series for the colder, higher-latitude oceans. In this thesis, the long-lived (+100 years) boreal mollusc (Bivalvia) Arctica islandica is shown to be practical for this purpose in the northern North Atlantic Ocean. The evidence, compiled here, demonstrates that the carbonate shell of this species faithfully records the ambient dissolved inorganic carbon`s (DIC) radiocarbon ({Delta}{sup 14}C) concentration and accurately reflects the ambient temperature in its stable oxygen isotope ({delta}{sup 18}O) composition. However, the stable carbon isotope ({delta}{sup 13}C) composition of the A. islandica shell likely is not a good recorder of ambient DIC {delta}{sup 13}C, and likely responds to physiological controls. Four {Delta}{sup 14}C time histories are reconstructed from the annual bands of A. islandica shells for the higher-latitudes of the northern North Atlantic Ocean (from 41{degree}N to 70{degree}N).

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206 p.

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OSTI as DE97053631

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE97053631
  • Report No.: DOE/OR/00033--T754
  • Report No.: MIT/WHOI--95-20
  • Grant Number: AC05-76OR00033
  • DOI: 10.2172/663502 | External Link
  • Office of Scientific & Technical Information Report Number: 663502
  • Archival Resource Key: ark:/67531/metadc708900

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  • September 1, 1995

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  • Sept. 12, 2015, 6:31 a.m.

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  • Oct. 19, 2017, 1:46 p.m.

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Weidman, C.R. Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic Ocean, report, September 1, 1995; Cambridge, Massachusetts. (digital.library.unt.edu/ark:/67531/metadc708900/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.