Development and Application of the Mollusc Arctica Islandica as a Paleoceanographic Tool for the North Atlantic Ocean.
The 14C and 180 composition of the annually banded, carbonate shell of the long-lived (+100 years) mollusc Arctica islandica are shown to be practical for reconstructing long term, high-resolution, DIC 14C and bottom temperature time histories for the continental shelves of the northern North Atlant...
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ftdtic:ADA307935 2023-05-15T15:22:28+02:00 Development and Application of the Mollusc Arctica Islandica as a Paleoceanographic Tool for the North Atlantic Ocean. Weidman, Christopher R. MASSACHUSETTS INST OF TECH CAMBRIDGE 1995-09 text/html http://www.dtic.mil/docs/citations/ADA307935 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA307935 en eng http://www.dtic.mil/docs/citations/ADA307935 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Ecology Inorganic Chemistry Physical and Dynamic Oceanography Structural Engineering and Building Technology *OCEAN SURFACE *SHELLS(STRUCTURAL FORMS) *CONTINENTAL SHELVES *SEA WATER *OCEANOGRAPHY *CARBONATES *PALEOCLIMATOLOGY CONTROL ANOMALIES SOURCES TEMPERATURE ATMOSPHERIC TEMPERATURE TIME CORRELATION SEASONAL VARIATIONS HISTORY ISOTOPES MARINE BIOLOGY PHYSIOLOGY CLIMATOLOGY SURFACE TEMPERATURE HIGH LATITUDES STRATIFICATION NORTH ATLANTIC OCEAN DEEP WATER BOTTOM ISOTOPE EFFECT CORAL RADIOCARBON DATING ARCTICA ISLANDICA BOREAL MOLLUSE BIVALVIA RADIOCARBON Text 1995 ftdtic 2016-02-19T17:57:32Z The 14C and 180 composition of the annually banded, carbonate shell of the long-lived (+100 years) mollusc Arctica islandica are shown to be practical for reconstructing long term, high-resolution, DIC 14C and bottom temperature time histories for the continental shelves of the northern North Atlantic Ocean. However, its I3C composition is shown not to be a good recorder of ambient DIC 13C, and likely is controlled by physiology. Four shell-derived 14C time histories are reconstructed for the high-latitude North Atlantic Ocean. These records show significant spatial and temporal differences in the evolution of surface 14C between subpolar and subtropical regions, which are attributed to regional differences in mixed-layer depth and the presence of deepwater sources. A shell-derived 109-year record (1875-1983) of bottom temperatures has been reconstructed for a location near the former Nantucket Lightship (400N, 690W). The detrended annual temperature anomalies of this record show significant positive correlation with regional bottom, sea surface and air temperature anomalies. However, the shell-derived record describes a century-long cooling (approx. 10C) in contrast to a century-long warming of regional sea surface temperatures of equal magnitude. This long term divergence between surface and bottom conditions is attributed to increased seasonal stratification. Prepared in cooperation with Woods Hole Oceanographic Inst., MA. Text Arctica islandica North Atlantic Defense Technical Information Center: DTIC Technical Reports database Nantucket ENVELOPE(-61.917,-61.917,-74.583,-74.583) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Ecology Inorganic Chemistry Physical and Dynamic Oceanography Structural Engineering and Building Technology *OCEAN SURFACE *SHELLS(STRUCTURAL FORMS) *CONTINENTAL SHELVES *SEA WATER *OCEANOGRAPHY *CARBONATES *PALEOCLIMATOLOGY CONTROL ANOMALIES SOURCES TEMPERATURE ATMOSPHERIC TEMPERATURE TIME CORRELATION SEASONAL VARIATIONS HISTORY ISOTOPES MARINE BIOLOGY PHYSIOLOGY CLIMATOLOGY SURFACE TEMPERATURE HIGH LATITUDES STRATIFICATION NORTH ATLANTIC OCEAN DEEP WATER BOTTOM ISOTOPE EFFECT CORAL RADIOCARBON DATING ARCTICA ISLANDICA BOREAL MOLLUSE BIVALVIA RADIOCARBON |
spellingShingle |
Ecology Inorganic Chemistry Physical and Dynamic Oceanography Structural Engineering and Building Technology *OCEAN SURFACE *SHELLS(STRUCTURAL FORMS) *CONTINENTAL SHELVES *SEA WATER *OCEANOGRAPHY *CARBONATES *PALEOCLIMATOLOGY CONTROL ANOMALIES SOURCES TEMPERATURE ATMOSPHERIC TEMPERATURE TIME CORRELATION SEASONAL VARIATIONS HISTORY ISOTOPES MARINE BIOLOGY PHYSIOLOGY CLIMATOLOGY SURFACE TEMPERATURE HIGH LATITUDES STRATIFICATION NORTH ATLANTIC OCEAN DEEP WATER BOTTOM ISOTOPE EFFECT CORAL RADIOCARBON DATING ARCTICA ISLANDICA BOREAL MOLLUSE BIVALVIA RADIOCARBON Weidman, Christopher R. Development and Application of the Mollusc Arctica Islandica as a Paleoceanographic Tool for the North Atlantic Ocean. |
topic_facet |
Ecology Inorganic Chemistry Physical and Dynamic Oceanography Structural Engineering and Building Technology *OCEAN SURFACE *SHELLS(STRUCTURAL FORMS) *CONTINENTAL SHELVES *SEA WATER *OCEANOGRAPHY *CARBONATES *PALEOCLIMATOLOGY CONTROL ANOMALIES SOURCES TEMPERATURE ATMOSPHERIC TEMPERATURE TIME CORRELATION SEASONAL VARIATIONS HISTORY ISOTOPES MARINE BIOLOGY PHYSIOLOGY CLIMATOLOGY SURFACE TEMPERATURE HIGH LATITUDES STRATIFICATION NORTH ATLANTIC OCEAN DEEP WATER BOTTOM ISOTOPE EFFECT CORAL RADIOCARBON DATING ARCTICA ISLANDICA BOREAL MOLLUSE BIVALVIA RADIOCARBON |
description |
The 14C and 180 composition of the annually banded, carbonate shell of the long-lived (+100 years) mollusc Arctica islandica are shown to be practical for reconstructing long term, high-resolution, DIC 14C and bottom temperature time histories for the continental shelves of the northern North Atlantic Ocean. However, its I3C composition is shown not to be a good recorder of ambient DIC 13C, and likely is controlled by physiology. Four shell-derived 14C time histories are reconstructed for the high-latitude North Atlantic Ocean. These records show significant spatial and temporal differences in the evolution of surface 14C between subpolar and subtropical regions, which are attributed to regional differences in mixed-layer depth and the presence of deepwater sources. A shell-derived 109-year record (1875-1983) of bottom temperatures has been reconstructed for a location near the former Nantucket Lightship (400N, 690W). The detrended annual temperature anomalies of this record show significant positive correlation with regional bottom, sea surface and air temperature anomalies. However, the shell-derived record describes a century-long cooling (approx. 10C) in contrast to a century-long warming of regional sea surface temperatures of equal magnitude. This long term divergence between surface and bottom conditions is attributed to increased seasonal stratification. Prepared in cooperation with Woods Hole Oceanographic Inst., MA. |
author2 |
MASSACHUSETTS INST OF TECH CAMBRIDGE |
format |
Text |
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. |
publishDate |
1995 |
url |
http://www.dtic.mil/docs/citations/ADA307935 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA307935 |
long_lat |
ENVELOPE(-61.917,-61.917,-74.583,-74.583) |
geographic |
Nantucket |
geographic_facet |
Nantucket |
genre |
Arctica islandica North Atlantic |
genre_facet |
Arctica islandica North Atlantic |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA307935 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766353129615392768 |