Distribution of 230Th in the Labrador Sea and its relation to ventilation

S. B. Moran; M. A. Charette; J. A. Hoff; R. L. Edwards; W. M. Landing

doi:10.1016/s0012-821x(97)00081-2

Distribution of ²³⁰Th in the Labrador Sea and its relation to ventilation

S. B. Moran, M. A. Charette, J. A. Hoff, R. L. Edwards, W. M. Landing

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

Measurements of dissolved and particulate ²³⁰Th and ²³²Th by thermal ionization mass spectrometry were made on samples collected from the Labrador Sea and the Denmark Strait and Iceland-Scotland overflow waters. The large-scale feature of low and invariant ²³⁰Th evident in deep waters of the Labrador Sea and previously observed in the deep northern Atlantic can be reproduced using a reversible scavenging model that includes the effect of ventilation. Advective transport also must be important in the redistribution of ²³⁰Th in other regions of the Atlantic and for other long-lived tracers, such as ²³¹Pa, ²⁶Al and ¹⁰Be.

Original language	English (US)
Pages (from-to)	151-160
Number of pages	10
Journal	Earth and Planetary Science Letters
Volume	150
Issue number	1-2
DOIs	https://doi.org/10.1016/s0012-821x(97)00081-2
State	Published - Jul 1997

Bibliographical note

Funding Information:
We wish to acknowledge the support ~otf he IOC, the Canadian government for use of the1C SS Hudson. the Captain and crew of the CSS H dson, Chief Scientist P.A. Yeats and the NSF for sp 1 nsoring the IOC cruises. We are grateful to R.F An erson, M.P. Bacon. W.S. Broecker, H.N. Edmon s and two anonymous reviewers for thorough and, 1 critical reviews. Lynn Hettinger corrected an e or in our original calculations. This work was fun ed by NSF grants OCE-9408945 to SBM and 0 1’ E-9203150, OCE-9402693. and EAR-94061 83 to RUE. &lKj

Keywords

Labrador Sea
Thorium

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title = "Distribution of 230Th in the Labrador Sea and its relation to ventilation",

abstract = "Measurements of dissolved and particulate 230Th and 232Th by thermal ionization mass spectrometry were made on samples collected from the Labrador Sea and the Denmark Strait and Iceland-Scotland overflow waters. The large-scale feature of low and invariant 230Th evident in deep waters of the Labrador Sea and previously observed in the deep northern Atlantic can be reproduced using a reversible scavenging model that includes the effect of ventilation. Advective transport also must be important in the redistribution of 230Th in other regions of the Atlantic and for other long-lived tracers, such as 231Pa, 26Al and 10Be.",

keywords = "Labrador Sea, Thorium",

author = "Moran, {S. B.} and Charette, {M. A.} and Hoff, {J. A.} and Edwards, {R. L.} and Landing, {W. M.}",

note = "Funding Information: We wish to acknowledge the support ~otf he IOC, the Canadian government for use of the1C SS Hudson. the Captain and crew of the CSS H dson, Chief Scientist P.A. Yeats and the NSF for sp 1 nsoring the IOC cruises. We are grateful to R.F An erson, M.P. Bacon. W.S. Broecker, H.N. Edmon s and two anonymous reviewers for thorough and, 1 critical reviews. Lynn Hettinger corrected an e or in our original calculations. This work was fun ed by NSF grants OCE-9408945 to SBM and 0 1{\textquoteright} E-9203150, OCE-9402693. and EAR-94061 83 to RUE. &lKj",

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AU - Moran, S. B.

AU - Charette, M. A.

AU - Hoff, J. A.

AU - Edwards, R. L.

AU - Landing, W. M.

N1 - Funding Information: We wish to acknowledge the support ~otf he IOC, the Canadian government for use of the1C SS Hudson. the Captain and crew of the CSS H dson, Chief Scientist P.A. Yeats and the NSF for sp 1 nsoring the IOC cruises. We are grateful to R.F An erson, M.P. Bacon. W.S. Broecker, H.N. Edmon s and two anonymous reviewers for thorough and, 1 critical reviews. Lynn Hettinger corrected an e or in our original calculations. This work was fun ed by NSF grants OCE-9408945 to SBM and 0 1’ E-9203150, OCE-9402693. and EAR-94061 83 to RUE. &lKj

PY - 1997/7

Y1 - 1997/7

N2 - Measurements of dissolved and particulate 230Th and 232Th by thermal ionization mass spectrometry were made on samples collected from the Labrador Sea and the Denmark Strait and Iceland-Scotland overflow waters. The large-scale feature of low and invariant 230Th evident in deep waters of the Labrador Sea and previously observed in the deep northern Atlantic can be reproduced using a reversible scavenging model that includes the effect of ventilation. Advective transport also must be important in the redistribution of 230Th in other regions of the Atlantic and for other long-lived tracers, such as 231Pa, 26Al and 10Be.

AB - Measurements of dissolved and particulate 230Th and 232Th by thermal ionization mass spectrometry were made on samples collected from the Labrador Sea and the Denmark Strait and Iceland-Scotland overflow waters. The large-scale feature of low and invariant 230Th evident in deep waters of the Labrador Sea and previously observed in the deep northern Atlantic can be reproduced using a reversible scavenging model that includes the effect of ventilation. Advective transport also must be important in the redistribution of 230Th in other regions of the Atlantic and for other long-lived tracers, such as 231Pa, 26Al and 10Be.

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