Optimization of the High-Frequency Radar Sites In the Bering Strait Region
Monitoring surface currents by coastal high-frequency radars (HFRs) is a cost-effective observational technique with good prospects for further development. An important issue in improving the efficiency of HFR systems is the optimization of radar positions on the coastline. Besides being constraine...
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ftsouthmissispun:oai:aquila.usm.edu:fac_pubs-20050 2023-07-30T04:02:09+02:00 Optimization of the High-Frequency Radar Sites In the Bering Strait Region Panteleev, Gleb Yaremchuk, Max Stroh, Jacob Posey, Pamela Hebert, David Nechaev, Dmitri A. 2015-01-01T08:00:00Z https://aquila.usm.edu/fac_pubs/18736 https://doi.org/10.1175/JTECH-D-14-00071.1 unknown The Aquila Digital Community https://aquila.usm.edu/fac_pubs/18736 https://doi.org/10.1175/JTECH-D-14-00071.1 Faculty Publications Data assimilation Empirical orthogonal functions Inverse methods Optimization Radars/Radar observations Singular vectors Oceanography and Atmospheric Sciences and Meteorology Physical Sciences and Mathematics text 2015 ftsouthmissispun https://doi.org/10.1175/JTECH-D-14-00071.1 2023-07-15T18:55:22Z Monitoring surface currents by coastal high-frequency radars (HFRs) is a cost-effective observational technique with good prospects for further development. An important issue in improving the efficiency of HFR systems is the optimization of radar positions on the coastline. Besides being constrained by environmental and logistic factors, such optimization has to account for prior knowledge of local circulation and the target quantities (such as transports through certain key sections) with respect to which the radar positions are to be optimized. In the proposed methodology, prior information of the regional circulation is specified by the solution of the 4D variational assimilation problem, where the available climatological data in the Bering Strait (BS) region are synthesized with dynamical constraints of a numerical model. The optimal HFR placement problem is solved by maximizing the reduction of a posteriori error in the mass, heat, and salt (MHS) transports through the target sections in the region. It is shown that the MHS transports into the Arctic and their redistribution within the Chukchi Sea are best monitored by placing HFRs at Cape Prince of Wales and on Little Diomede Island. Another equally efficient configuration involves placement of the second radar at Sinuk (western Alaska) in place of Diomede. Computations show that 1) optimization of the HFR deployment yields a significant (1.3-3 times) reduction of the transport errors compared to nonoptimal positioning of the radars and 2) error reduction provided by two HFRs is an order of magnitude better than the one obtained from three moorings permanently maintained in the region for the last 5 yr. This result shows a significant advantage of BS monitoring by HFRs compared to the more traditional technique of in situ moored observations. The obtained results are validated by an extensive set of observing system simulation experiments. Text Arctic Bering Strait Chukchi Chukchi Sea Diomede Island Alaska The University of Southern Mississippi: The Aquila Digital Community Arctic Bering Strait Cape Prince of Wales ENVELOPE(-71.499,-71.499,61.617,61.617) Chukchi Sea Journal of Atmospheric and Oceanic Technology 32 2 297 309 |
institution |
Open Polar |
collection |
The University of Southern Mississippi: The Aquila Digital Community |
op_collection_id |
ftsouthmissispun |
language |
unknown |
topic |
Data assimilation Empirical orthogonal functions Inverse methods Optimization Radars/Radar observations Singular vectors Oceanography and Atmospheric Sciences and Meteorology Physical Sciences and Mathematics |
spellingShingle |
Data assimilation Empirical orthogonal functions Inverse methods Optimization Radars/Radar observations Singular vectors Oceanography and Atmospheric Sciences and Meteorology Physical Sciences and Mathematics Panteleev, Gleb Yaremchuk, Max Stroh, Jacob Posey, Pamela Hebert, David Nechaev, Dmitri A. Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
topic_facet |
Data assimilation Empirical orthogonal functions Inverse methods Optimization Radars/Radar observations Singular vectors Oceanography and Atmospheric Sciences and Meteorology Physical Sciences and Mathematics |
description |
Monitoring surface currents by coastal high-frequency radars (HFRs) is a cost-effective observational technique with good prospects for further development. An important issue in improving the efficiency of HFR systems is the optimization of radar positions on the coastline. Besides being constrained by environmental and logistic factors, such optimization has to account for prior knowledge of local circulation and the target quantities (such as transports through certain key sections) with respect to which the radar positions are to be optimized. In the proposed methodology, prior information of the regional circulation is specified by the solution of the 4D variational assimilation problem, where the available climatological data in the Bering Strait (BS) region are synthesized with dynamical constraints of a numerical model. The optimal HFR placement problem is solved by maximizing the reduction of a posteriori error in the mass, heat, and salt (MHS) transports through the target sections in the region. It is shown that the MHS transports into the Arctic and their redistribution within the Chukchi Sea are best monitored by placing HFRs at Cape Prince of Wales and on Little Diomede Island. Another equally efficient configuration involves placement of the second radar at Sinuk (western Alaska) in place of Diomede. Computations show that 1) optimization of the HFR deployment yields a significant (1.3-3 times) reduction of the transport errors compared to nonoptimal positioning of the radars and 2) error reduction provided by two HFRs is an order of magnitude better than the one obtained from three moorings permanently maintained in the region for the last 5 yr. This result shows a significant advantage of BS monitoring by HFRs compared to the more traditional technique of in situ moored observations. The obtained results are validated by an extensive set of observing system simulation experiments. |
format |
Text |
author |
Panteleev, Gleb Yaremchuk, Max Stroh, Jacob Posey, Pamela Hebert, David Nechaev, Dmitri A. |
author_facet |
Panteleev, Gleb Yaremchuk, Max Stroh, Jacob Posey, Pamela Hebert, David Nechaev, Dmitri A. |
author_sort |
Panteleev, Gleb |
title |
Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
title_short |
Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
title_full |
Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
title_fullStr |
Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
title_full_unstemmed |
Optimization of the High-Frequency Radar Sites In the Bering Strait Region |
title_sort |
optimization of the high-frequency radar sites in the bering strait region |
publisher |
The Aquila Digital Community |
publishDate |
2015 |
url |
https://aquila.usm.edu/fac_pubs/18736 https://doi.org/10.1175/JTECH-D-14-00071.1 |
long_lat |
ENVELOPE(-71.499,-71.499,61.617,61.617) |
geographic |
Arctic Bering Strait Cape Prince of Wales Chukchi Sea |
geographic_facet |
Arctic Bering Strait Cape Prince of Wales Chukchi Sea |
genre |
Arctic Bering Strait Chukchi Chukchi Sea Diomede Island Alaska |
genre_facet |
Arctic Bering Strait Chukchi Chukchi Sea Diomede Island Alaska |
op_source |
Faculty Publications |
op_relation |
https://aquila.usm.edu/fac_pubs/18736 https://doi.org/10.1175/JTECH-D-14-00071.1 |
op_doi |
https://doi.org/10.1175/JTECH-D-14-00071.1 |
container_title |
Journal of Atmospheric and Oceanic Technology |
container_volume |
32 |
container_issue |
2 |
container_start_page |
297 |
op_container_end_page |
309 |
_version_ |
1772812878731018240 |