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  Transport and burial rates of 10Be and 231Pa in the pacific-ocean during the holocene period

Lao, Y., Anderson, R. F., Broecker, W. S., Trumbore, S. E., Hofmann, H. J., & Wolfli, W. (1992). Transport and burial rates of 10Be and 231Pa in the pacific-ocean during the holocene period. Earth and Planetary Science Letters, 113(1-2), 173-189. doi:10.1016/0012-821X(92)90218-K.

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Lao, Y., Author
Anderson, R. F., Author
Broecker, W. S., Author
Trumbore, Susan E.1, Author              
Hofmann, H. J., Author
Wolfli, W., Author
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1External Organizations, ou_persistent22              

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Free keywords: north pacific particulate matter accumulation rates pelagic sediments th-230 atlantic sea california removal pb-210
 Abstract: An ocean-wide study of the rates of removal of Be-10 and Pa-231 in the Pacific Ocean has identified intensified scavenging of the Be-10 and Pa-231 in several ocean margin areas, including the Northeastern and Northwestern Pacific, the Bering Sea, the Eastern Equatorial Pacific and the South Pacific Ocean. Scavenging rates of Be-10 and Pa-231 are clearly Correlated to particle flux. Principal component analysis further suggests that scavenging of Be-10 and Pa-231 may be related to opal productivity in surface waters. A simple box model was constructed to partition the deposition of Th-230, Pa-231 and Be-10 between open ocean and ocean margin sediments. Model parameters were constrained using measured values of Th-230 and Pa-231, which have a common source, and then applied to Be-10. An average Holocene Be-10 deposition rate for the entire Pacific Ocean is estimated to be approximately 1.5 x 10(6) atoms/cm2 yr-1, with approximately 70% of the total Be-10 supplied to the Pacific being deposited in margin sediments underlying only 10% of the ocean. The short residence times of Be-10 in ocean margin regions (from < 100 to approximately 200 yr) compared to the long Be-10 residence time in the central open Pacific Ocean (approximately 1000 yr) reflects the intensified scavenging of Be-10 in ocean margin waters. The results of this study suggest that the Pacific Ocean acts as a relatively closed basin with respect to the transport and burial of Be-10; therefore, the average Be-10 deposition rate in the Pacific Ocean can be used as an estimate of the global average production rate of Be-10 in the atmosphere during the Holocene period.

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Language(s): eng - English
 Dates: 1992
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: Other: BEX423
DOI: 10.1016/0012-821X(92)90218-K
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Title: Earth and Planetary Science Letters
  Other : Earth Planet. Sci. Lett.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 113 (1-2) Sequence Number: - Start / End Page: 173 - 189 Identifier: ISSN: 0012-821X
CoNE: https://pure.mpg.de/cone/journals/resource/954925395406