Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer
[1] A1 ° horizontal resolution North Atlantic general circulation model (GCM) in the latitude band 4.5°S to 39.5°N is compared to, and then combined with, chlorofluorocarbon and tritium transient tracer data. The method of Lagrange multipliers (adjoint) is used. Tracer distribution within the model...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.389.5052 2023-05-15T17:30:23+02:00 Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer Xingwen Li Carl Wunsch The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.389.5052 http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.389.5052 http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf Oceanography General Physical and chemical properties of seawater KEYWORDS transient tracer state text ftciteseerx 2016-09-18T00:42:19Z [1] A1 ° horizontal resolution North Atlantic general circulation model (GCM) in the latitude band 4.5°S to 39.5°N is compared to, and then combined with, chlorofluorocarbon and tritium transient tracer data. The method of Lagrange multipliers (adjoint) is used. Tracer distribution within the model ocean interior is primarily sensitive to the flux through the open northern boundary. This flux is determined by the estimation method and is found to deviate from the initial estimate significantly for all tracers. An attempt to carry the model domain to 78.5°N showed the GCM inadequacy, believed to be primarily a problem of spatial resolution, to compute the convective injection of tracer into the deep ocean. Any such errors persist throughout the tracer integration and corrupt all further tracer concentrations. In general, and consistent with earlier much simpler computations, uncertainties in surface and northern boundary conditions dominate the computed tracer concentrations. The final results here are improved estimates of the three-dimensional time histories of the tritium and CFCs and their boundary conditions over the model domain, with very little information available to constrain the GCM itself Text North Atlantic Unknown Lagrange ENVELOPE(-62.597,-62.597,-64.529,-64.529) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Oceanography General Physical and chemical properties of seawater KEYWORDS transient tracer state |
spellingShingle |
Oceanography General Physical and chemical properties of seawater KEYWORDS transient tracer state Xingwen Li Carl Wunsch Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
topic_facet |
Oceanography General Physical and chemical properties of seawater KEYWORDS transient tracer state |
description |
[1] A1 ° horizontal resolution North Atlantic general circulation model (GCM) in the latitude band 4.5°S to 39.5°N is compared to, and then combined with, chlorofluorocarbon and tritium transient tracer data. The method of Lagrange multipliers (adjoint) is used. Tracer distribution within the model ocean interior is primarily sensitive to the flux through the open northern boundary. This flux is determined by the estimation method and is found to deviate from the initial estimate significantly for all tracers. An attempt to carry the model domain to 78.5°N showed the GCM inadequacy, believed to be primarily a problem of spatial resolution, to compute the convective injection of tracer into the deep ocean. Any such errors persist throughout the tracer integration and corrupt all further tracer concentrations. In general, and consistent with earlier much simpler computations, uncertainties in surface and northern boundary conditions dominate the computed tracer concentrations. The final results here are improved estimates of the three-dimensional time histories of the tritium and CFCs and their boundary conditions over the model domain, with very little information available to constrain the GCM itself |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Xingwen Li Carl Wunsch |
author_facet |
Xingwen Li Carl Wunsch |
author_sort |
Xingwen Li |
title |
Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
title_short |
Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
title_full |
Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
title_fullStr |
Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
title_full_unstemmed |
Constraining the North Atlantic circulation between 4.5°S and 39.5°N with transient tracer |
title_sort |
constraining the north atlantic circulation between 4.5°s and 39.5°n with transient tracer |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.389.5052 http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf |
long_lat |
ENVELOPE(-62.597,-62.597,-64.529,-64.529) |
geographic |
Lagrange |
geographic_facet |
Lagrange |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.389.5052 http://ocean.mit.edu/~cwunsch/papersonline/liandwunsch2003.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766126761630760960 |