Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period
An ocean-wide study of the rates of removal of 10Be and 231Pa in the Pacific Ocean has identified intensified scavenging of the 10Be and 231Pa in several ocean margin areas, including the Northeastern and Northwestern Pacific, the Bering Sea, the Eastern Equatorial Pacific and the South Pacific Ocea...
Published in: | Earth and Planetary Science Letters |
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1992
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ftcdlib:oai:escholarship.org:ark:/13030/qt9br449h0 2024-09-09T19:33:52+00:00 Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period Lao, Yong Anderson, Robert F Broecker, Wallace S Trumbore, Susan E Hofmann, Hansjakob J Wolfli, Willy 173 - 189 1992-09-01 application/pdf https://escholarship.org/uc/item/9br449h0 https://escholarship.org/content/qt9br449h0/qt9br449h0.pdf https://doi.org/10.1016/0012-821x(92)90218-k unknown eScholarship, University of California qt9br449h0 https://escholarship.org/uc/item/9br449h0 https://escholarship.org/content/qt9br449h0/qt9br449h0.pdf doi:10.1016/0012-821x(92)90218-k CC-BY Earth and Planetary Science Letters, vol 113, iss 1-2 Life Below Water Physical Sciences Earth Sciences Geochemistry & Geophysics article 1992 ftcdlib https://doi.org/10.1016/0012-821x(92)90218-k 2024-06-28T06:28:19Z An ocean-wide study of the rates of removal of 10Be and 231Pa in the Pacific Ocean has identified intensified scavenging of the 10Be and 231Pa 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 10Be and 231Pa are clearly correlated to particle flux. Principal component analysis further suggests that scavenging of 10Be and 231Pa may be related to opal productivity in surface waters. A simple box model was constructed to partition the deposition of 230Th, 231Pa and 10Be between open ocean and ocean margin sediments. Model parameters were constrained using measured values of 230Th and 231Pa, which have a common source, and then applied to 10Be. An average Holocene 10Be deposition rate for the entire Pacific Ocean is estimated to be ∼ 1.5 × 106 atoms/cm2 yr-1, with ∼ 70% of the total 10Be supplied to the Pacific being deposited in margin sediments underlying only 10% of the ocean. The short residence times of 10Be in ocean margin regions (from < 100 to ∼ 200 yr) compared to the long 10Be residence time in the central open Pacific Ocean ( ∼ 1000 yr) reflects the intensified scavenging of 10Be 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 10Be; therefore, the average 10Be deposition rate in the Pacific Ocean can be used as an estimate of the global average production rate of 10Be in the atmosphere during the Holocene period. © 1992. Article in Journal/Newspaper Bering Sea University of California: eScholarship Bering Sea Pacific Earth and Planetary Science Letters 113 1-2 173 189 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Life Below Water Physical Sciences Earth Sciences Geochemistry & Geophysics |
spellingShingle |
Life Below Water Physical Sciences Earth Sciences Geochemistry & Geophysics Lao, Yong Anderson, Robert F Broecker, Wallace S Trumbore, Susan E Hofmann, Hansjakob J Wolfli, Willy Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
topic_facet |
Life Below Water Physical Sciences Earth Sciences Geochemistry & Geophysics |
description |
An ocean-wide study of the rates of removal of 10Be and 231Pa in the Pacific Ocean has identified intensified scavenging of the 10Be and 231Pa 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 10Be and 231Pa are clearly correlated to particle flux. Principal component analysis further suggests that scavenging of 10Be and 231Pa may be related to opal productivity in surface waters. A simple box model was constructed to partition the deposition of 230Th, 231Pa and 10Be between open ocean and ocean margin sediments. Model parameters were constrained using measured values of 230Th and 231Pa, which have a common source, and then applied to 10Be. An average Holocene 10Be deposition rate for the entire Pacific Ocean is estimated to be ∼ 1.5 × 106 atoms/cm2 yr-1, with ∼ 70% of the total 10Be supplied to the Pacific being deposited in margin sediments underlying only 10% of the ocean. The short residence times of 10Be in ocean margin regions (from < 100 to ∼ 200 yr) compared to the long 10Be residence time in the central open Pacific Ocean ( ∼ 1000 yr) reflects the intensified scavenging of 10Be 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 10Be; therefore, the average 10Be deposition rate in the Pacific Ocean can be used as an estimate of the global average production rate of 10Be in the atmosphere during the Holocene period. © 1992. |
format |
Article in Journal/Newspaper |
author |
Lao, Yong Anderson, Robert F Broecker, Wallace S Trumbore, Susan E Hofmann, Hansjakob J Wolfli, Willy |
author_facet |
Lao, Yong Anderson, Robert F Broecker, Wallace S Trumbore, Susan E Hofmann, Hansjakob J Wolfli, Willy |
author_sort |
Lao, Yong |
title |
Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
title_short |
Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
title_full |
Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
title_fullStr |
Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
title_full_unstemmed |
Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period |
title_sort |
transport and burial rates of10be and231pa in the pacific ocean during the holocene period |
publisher |
eScholarship, University of California |
publishDate |
1992 |
url |
https://escholarship.org/uc/item/9br449h0 https://escholarship.org/content/qt9br449h0/qt9br449h0.pdf https://doi.org/10.1016/0012-821x(92)90218-k |
op_coverage |
173 - 189 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Earth and Planetary Science Letters, vol 113, iss 1-2 |
op_relation |
qt9br449h0 https://escholarship.org/uc/item/9br449h0 https://escholarship.org/content/qt9br449h0/qt9br449h0.pdf doi:10.1016/0012-821x(92)90218-k |
op_rights |
CC-BY |
op_doi |
https://doi.org/10.1016/0012-821x(92)90218-k |
container_title |
Earth and Planetary Science Letters |
container_volume |
113 |
container_issue |
1-2 |
container_start_page |
173 |
op_container_end_page |
189 |
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1809903397781897216 |