A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean
The vertical diffusivity KV in the upper half-kilometer of the North Pacific subtropical pycnocline is estimated from observations of the spreading rate of anthropogenic tritium. The calculation is based on approximately 300 ocean tritium profiles made since tritium was introduced to the atmosphere...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.523.84 2023-05-15T17:32:27+02:00 A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean Dan E. Kelley Kim A. Van Scoy The Pennsylvania State University CiteSeerX Archives 1999 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.523.84 http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.523.84 http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf text 1999 ftciteseerx 2016-01-08T10:16:04Z The vertical diffusivity KV in the upper half-kilometer of the North Pacific subtropical pycnocline is estimated from observations of the spreading rate of anthropogenic tritium. The calculation is based on approximately 300 ocean tritium profiles made since tritium was introduced to the atmosphere via bomb testing in the 1960s. The data coverage does not permit detailed mapping of tritium penetration, especially in the sparsely sampled western Pacific. For this reason, and to minimize advective effects, the spreading rate is averaged within the closed streamlines of the subtropical gyre spanning;58N to;408N. The result, KV 5 (1.5 6 0.7) 3 1025 m2 s21, is consistent with inferences from microstructure and purposefully released tracer measurements in the North Atlantic, confirming that the spatially averaged rate of mixing in the upper pycnocline is substantially lower than the canonical Munk estimate for the lower pycnocline. 1. Text North Atlantic Unknown Munk ENVELOPE(-95.993,-95.993,55.979,55.979) Pacific |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
The vertical diffusivity KV in the upper half-kilometer of the North Pacific subtropical pycnocline is estimated from observations of the spreading rate of anthropogenic tritium. The calculation is based on approximately 300 ocean tritium profiles made since tritium was introduced to the atmosphere via bomb testing in the 1960s. The data coverage does not permit detailed mapping of tritium penetration, especially in the sparsely sampled western Pacific. For this reason, and to minimize advective effects, the spreading rate is averaged within the closed streamlines of the subtropical gyre spanning;58N to;408N. The result, KV 5 (1.5 6 0.7) 3 1025 m2 s21, is consistent with inferences from microstructure and purposefully released tracer measurements in the North Atlantic, confirming that the spatially averaged rate of mixing in the upper pycnocline is substantially lower than the canonical Munk estimate for the lower pycnocline. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Dan E. Kelley Kim A. Van Scoy |
spellingShingle |
Dan E. Kelley Kim A. Van Scoy A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
author_facet |
Dan E. Kelley Kim A. Van Scoy |
author_sort |
Dan E. Kelley |
title |
A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
title_short |
A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
title_full |
A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
title_fullStr |
A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
title_full_unstemmed |
A basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the North Pacific Ocean |
title_sort |
basin-wide estimate of vertical mixing in the upper pycnocline: spreading of bomb tritium in the north pacific ocean |
publishDate |
1999 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.523.84 http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf |
long_lat |
ENVELOPE(-95.993,-95.993,55.979,55.979) |
geographic |
Munk Pacific |
geographic_facet |
Munk Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.523.84 http://myweb.dal.ca/kelley/pub/pub_sci/Kelley_VanScoy_JPO_1999/Kelley_VanScoy_JPO_1999.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766130592885243904 |