Ventilation rates estimated from tracers in the presence of mixing
The intimate relationship among ventilation, transit-time distributions, and transient tracer budgets is analyzed. To characterize the advective–diffusive transport from the mixed layer to the interior ocean in terms of flux we employ a cumulative ventilation-rate distribution, (), defined as the on...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.605.1445 2023-05-15T17:06:10+02:00 Ventilation rates estimated from tracers in the presence of mixing Timothy M. Hall Thomas W. N. Haine Mark Holzer Deborah A. Lebel The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.605.1445 http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.605.1445 http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf text 2007 ftciteseerx 2016-01-08T14:12:53Z The intimate relationship among ventilation, transit-time distributions, and transient tracer budgets is analyzed. To characterize the advective–diffusive transport from the mixed layer to the interior ocean in terms of flux we employ a cumulative ventilation-rate distribution, (), defined as the one-way mass flux of water that resides at least time in the interior before returning. A one-way (or gross) flux contrasts with the net advective flux, often called the subduction rate, which does not accommodate the effects of mixing, and it contrasts with the formation rate, which depends only on the net effects of advection and diffusive mixing. As decreases () increases, encompassing progressively more one-way flux. In general, is a rapidly varying function of (it diverges at small ), and there is no single residence time at which can be evaluated to fully summarize the advective–diffusive flux. To reconcile discrepancies between estimates of formation rates in a recent GCM study, () is used. Then chlorofluorocarbon data are used to bound () for Subtropical Mode Water and Labrador Sea Water in the North Atlantic Ocean. The authors show that the neglect of diffusive mixing leads to spurious behavior, such as apparent time dependence in the formation, even when transport is steady. 1. Text Labrador Sea North Atlantic Unknown |
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English |
description |
The intimate relationship among ventilation, transit-time distributions, and transient tracer budgets is analyzed. To characterize the advective–diffusive transport from the mixed layer to the interior ocean in terms of flux we employ a cumulative ventilation-rate distribution, (), defined as the one-way mass flux of water that resides at least time in the interior before returning. A one-way (or gross) flux contrasts with the net advective flux, often called the subduction rate, which does not accommodate the effects of mixing, and it contrasts with the formation rate, which depends only on the net effects of advection and diffusive mixing. As decreases () increases, encompassing progressively more one-way flux. In general, is a rapidly varying function of (it diverges at small ), and there is no single residence time at which can be evaluated to fully summarize the advective–diffusive flux. To reconcile discrepancies between estimates of formation rates in a recent GCM study, () is used. Then chlorofluorocarbon data are used to bound () for Subtropical Mode Water and Labrador Sea Water in the North Atlantic Ocean. The authors show that the neglect of diffusive mixing leads to spurious behavior, such as apparent time dependence in the formation, even when transport is steady. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Timothy M. Hall Thomas W. N. Haine Mark Holzer Deborah A. Lebel |
spellingShingle |
Timothy M. Hall Thomas W. N. Haine Mark Holzer Deborah A. Lebel Ventilation rates estimated from tracers in the presence of mixing |
author_facet |
Timothy M. Hall Thomas W. N. Haine Mark Holzer Deborah A. Lebel |
author_sort |
Timothy M. Hall |
title |
Ventilation rates estimated from tracers in the presence of mixing |
title_short |
Ventilation rates estimated from tracers in the presence of mixing |
title_full |
Ventilation rates estimated from tracers in the presence of mixing |
title_fullStr |
Ventilation rates estimated from tracers in the presence of mixing |
title_full_unstemmed |
Ventilation rates estimated from tracers in the presence of mixing |
title_sort |
ventilation rates estimated from tracers in the presence of mixing |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.605.1445 http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.605.1445 http://www.jhu.edu/~dwaugh1/papers/Hall_etal_JPO2007.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766061178173259776 |