Optimization of an observing system design for the North Atlantic meridional overturning circulation
Three methods are analyzed for the design of ocean observing systems to monitor the meridional overturning circulation (MOC) in the North Atlantic. Specifically, a continuous monitoring array to monitor the MOC at 1000 m at different latitudes is “deployed” into a numerical model. The authors compar...
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ftpubman:oai:pure.mpg.de:item_994182 2023-08-27T04:10:46+02:00 Optimization of an observing system design for the North Atlantic meridional overturning circulation Baehr, J. McInerney, D. Keller, K. Marotzke, J. 2008-04 application/pdf http://hdl.handle.net/11858/00-001M-0000-0011-F9D0-8 http://hdl.handle.net/11858/00-001M-0000-0011-F9CF-E eng eng info:eu-repo/semantics/altIdentifier/doi/10.1175/2007JTECHO535.1 http://hdl.handle.net/11858/00-001M-0000-0011-F9D0-8 http://hdl.handle.net/11858/00-001M-0000-0011-F9CF-E info:eu-repo/semantics/openAccess Journal of Atmospheric & Oceanic Technology info:eu-repo/semantics/article 2008 ftpubman https://doi.org/10.1175/2007JTECHO535.1 2023-08-02T01:34:38Z Three methods are analyzed for the design of ocean observing systems to monitor the meridional overturning circulation (MOC) in the North Atlantic. Specifically, a continuous monitoring array to monitor the MOC at 1000 m at different latitudes is “deployed” into a numerical model. The authors compare array design methods guided by (i) physical intuition (heuristic array design), (ii) sequential optimization, and (iii) global optimization. The global optimization technique can recover the true global solution for the analyzed array design, while gradient-based optimization would be prone to misconverge. Both global optimization and heuristic array design yield considerably improved results over sequential array design. Global optimization always outperforms the heuristic array design in terms of minimizing the root-mean-square error. However, whether the results are physically meaningful is not guaranteed; the apparent success might merely represent a solution in which misfits compensate for each other accidentally. Testing the solution gained from global optimization in an independent dataset can provide crucial information about the solution’s robustness. Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Journal of Atmospheric and Oceanic Technology 25 4 625 634 |
institution |
Open Polar |
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Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
Three methods are analyzed for the design of ocean observing systems to monitor the meridional overturning circulation (MOC) in the North Atlantic. Specifically, a continuous monitoring array to monitor the MOC at 1000 m at different latitudes is “deployed” into a numerical model. The authors compare array design methods guided by (i) physical intuition (heuristic array design), (ii) sequential optimization, and (iii) global optimization. The global optimization technique can recover the true global solution for the analyzed array design, while gradient-based optimization would be prone to misconverge. Both global optimization and heuristic array design yield considerably improved results over sequential array design. Global optimization always outperforms the heuristic array design in terms of minimizing the root-mean-square error. However, whether the results are physically meaningful is not guaranteed; the apparent success might merely represent a solution in which misfits compensate for each other accidentally. Testing the solution gained from global optimization in an independent dataset can provide crucial information about the solution’s robustness. |
format |
Article in Journal/Newspaper |
author |
Baehr, J. McInerney, D. Keller, K. Marotzke, J. |
spellingShingle |
Baehr, J. McInerney, D. Keller, K. Marotzke, J. Optimization of an observing system design for the North Atlantic meridional overturning circulation |
author_facet |
Baehr, J. McInerney, D. Keller, K. Marotzke, J. |
author_sort |
Baehr, J. |
title |
Optimization of an observing system design for the North Atlantic meridional overturning circulation |
title_short |
Optimization of an observing system design for the North Atlantic meridional overturning circulation |
title_full |
Optimization of an observing system design for the North Atlantic meridional overturning circulation |
title_fullStr |
Optimization of an observing system design for the North Atlantic meridional overturning circulation |
title_full_unstemmed |
Optimization of an observing system design for the North Atlantic meridional overturning circulation |
title_sort |
optimization of an observing system design for the north atlantic meridional overturning circulation |
publishDate |
2008 |
url |
http://hdl.handle.net/11858/00-001M-0000-0011-F9D0-8 http://hdl.handle.net/11858/00-001M-0000-0011-F9CF-E |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Atmospheric & Oceanic Technology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/2007JTECHO535.1 http://hdl.handle.net/11858/00-001M-0000-0011-F9D0-8 http://hdl.handle.net/11858/00-001M-0000-0011-F9CF-E |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/2007JTECHO535.1 |
container_title |
Journal of Atmospheric and Oceanic Technology |
container_volume |
25 |
container_issue |
4 |
container_start_page |
625 |
op_container_end_page |
634 |
_version_ |
1775353078117040128 |