Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology September 1995 Until now there has been no tool comparable to corals for reconstructing long term high-resolution geoc...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
1995
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/5634 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5634 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5634 2023-05-15T15:22:32+02:00 Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean Weidman, Christopher R. 41°N-70°N Northern North Atlantic Ocean 1995-09 application/pdf https://hdl.handle.net/1912/5634 en_US eng Massachusetts Institute of Technology and Woods Hole Oceanographic Institution WHOI Theses https://hdl.handle.net/1912/5634 doi:10.1575/1912/5634 doi:10.1575/1912/5634 Clams Paleoclimatology Ocean quahog Thesis 1995 ftwhoas https://doi.org/10.1575/1912/5634 2022-05-28T22:58:45Z Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology September 1995 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 (Δ14C) concentration and accurately reflects the ambient temperature in its stable oxygen isotope (δ180) composition. However, the stable carbon isotope (δ13C) composition of the A. islandica shell likely is not a good recorder of ambient DIC δl3C, and likely responds to physiological controls. Four Δ14C time histories are reconstructed from the annual bands of A. islandica shells for the higher-latitudes of the northern North Atlantic Ocean (from 41°N to 70°N). These ocean records show significant spatial and temporal differences in the evolution of the radiocarbon signal between the subpolar and subtropical regions and between eastern and western regions of the northern North Atlantic, which are attributed to regional differences in mixed-layer depth and the presence of deepwater sources. A 109-year interannual record of bottom temperatures for a location near the former Nantucket Lightship position has been reconstructed for the period 1875-1983 from the overlapped stable oxygen isotope composition of four A. islandica shells. This record's annual temperature anomalies (variation from the running ten-year mean) show significant positive correlation with regional bottom, sea surface and air temperature anomalies. However, the shell-derived bottom temperature record describes a century-long cooling (~1°C) in contrast to a ... Thesis Arctica islandica North Atlantic Ocean quahog Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Nantucket ENVELOPE(-61.917,-61.917,-74.583,-74.583) Woods Hole, MA |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Clams Paleoclimatology Ocean quahog |
spellingShingle |
Clams Paleoclimatology Ocean quahog Weidman, Christopher R. Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
topic_facet |
Clams Paleoclimatology Ocean quahog |
description |
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology September 1995 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 (Δ14C) concentration and accurately reflects the ambient temperature in its stable oxygen isotope (δ180) composition. However, the stable carbon isotope (δ13C) composition of the A. islandica shell likely is not a good recorder of ambient DIC δl3C, and likely responds to physiological controls. Four Δ14C time histories are reconstructed from the annual bands of A. islandica shells for the higher-latitudes of the northern North Atlantic Ocean (from 41°N to 70°N). These ocean records show significant spatial and temporal differences in the evolution of the radiocarbon signal between the subpolar and subtropical regions and between eastern and western regions of the northern North Atlantic, which are attributed to regional differences in mixed-layer depth and the presence of deepwater sources. A 109-year interannual record of bottom temperatures for a location near the former Nantucket Lightship position has been reconstructed for the period 1875-1983 from the overlapped stable oxygen isotope composition of four A. islandica shells. This record's annual temperature anomalies (variation from the running ten-year mean) show significant positive correlation with regional bottom, sea surface and air temperature anomalies. However, the shell-derived bottom temperature record describes a century-long cooling (~1°C) in contrast to a ... |
format |
Thesis |
author |
Weidman, Christopher R. |
author_facet |
Weidman, Christopher R. |
author_sort |
Weidman, Christopher R. |
title |
Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
title_short |
Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
title_full |
Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
title_fullStr |
Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
title_full_unstemmed |
Development and application of the mollusc Arctica islandica as a paleoceanographic tool for the North Atlantic ocean |
title_sort |
development and application of the mollusc arctica islandica as a paleoceanographic tool for the north atlantic ocean |
publisher |
Massachusetts Institute of Technology and Woods Hole Oceanographic Institution |
publishDate |
1995 |
url |
https://hdl.handle.net/1912/5634 |
op_coverage |
41°N-70°N Northern North Atlantic Ocean |
long_lat |
ENVELOPE(-61.917,-61.917,-74.583,-74.583) |
geographic |
Nantucket |
geographic_facet |
Nantucket |
genre |
Arctica islandica North Atlantic Ocean quahog |
genre_facet |
Arctica islandica North Atlantic Ocean quahog |
op_source |
doi:10.1575/1912/5634 |
op_relation |
WHOI Theses https://hdl.handle.net/1912/5634 doi:10.1575/1912/5634 |
op_doi |
https://doi.org/10.1575/1912/5634 |
op_publisher_place |
Woods Hole, MA |
_version_ |
1766353178801995776 |