Configuring High Frequency Radar Observations in the Southern Chukchi Sea
In recent years, monitoring offshore surface circulation in the Arctic Ocean with high frequency radars has become an issue of increasing practical importance. In this study, radar positions are optimized by minimizing the reconstruction errors of the surface currents in the Southeastern Chukchi Sea...
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ftdtic:ADA582636 2023-05-15T14:55:54+02:00 Configuring High Frequency Radar Observations in the Southern Chukchi Sea Panteleev, Gleb Yaremchuk, Max Francis, Oceana Kikuchi, Takashi NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV 2013-02-24 text/html http://www.dtic.mil/docs/citations/ADA582636 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA582636 en eng http://www.dtic.mil/docs/citations/ADA582636 Approved for public release; distribution is unlimited. DTIC Physical and Dynamic Oceanography Active & Passive Radar Detection & Equipment *CHUKCHI SEA *OBSERVATION *RADAR EQUATIONS HIGH FREQUENCY OCEAN CURRENTS OPTIMIZATION SENSITIVITY DATA ASSIMILATION HFR(HIGH FREQUENCY RADAR) ADJOINT SENSITIVITY ANALYSIS PE0602435N WU73-6414-02-5 Text 2013 ftdtic 2016-02-24T11:51:36Z In recent years, monitoring offshore surface circulation in the Arctic Ocean with high frequency radars has become an issue of increasing practical importance. In this study, radar positions are optimized by minimizing the reconstruction errors of the surface currents in the Southeastern Chukchi Sea. By means of an adjoint sensitivity technique it is shown that in the case of a pair of radars, their optimal (i.e. most favorable) location is at Kivalina, a settlement near the strongest outflow of the Alaskan Coastal Current from the monitored domain. The least favorable location is at Shishmaref, a settlement near relatively weak inflow into the region as observed from the coast. However, if two pairs of radars are available, the best locations are Kivalina and Shishmaref. The results are verified using observational system simulation experiments (OSSEs) performed in the framework of a 4-dimensional variational assimilation of simulated radar observations into a numerical model. It is shown that correct specification of the first guess solution is of primary importance for obtaining realistic results from both adjoint sensitivity analysis and OSSEs. This emphasizes the necessity of obtaining accurate high resolution climatologies for future ice-free offshore regions in the Arctic. The original document contains color images. Pulished in Polar Science, v7 p72-81, 24 Feb 2013. Prepared in cooperation with the International Arctic Research Center, University of Alaska, Fairbanks, the Department of Civil and Environmental Engineering, University of Hawaii at Manoa, and the Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan. Text Arctic Arctic Ocean Chukchi Chukchi Sea International Arctic Research Center Alaska Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Chukchi Sea Fairbanks |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Active & Passive Radar Detection & Equipment *CHUKCHI SEA *OBSERVATION *RADAR EQUATIONS HIGH FREQUENCY OCEAN CURRENTS OPTIMIZATION SENSITIVITY DATA ASSIMILATION HFR(HIGH FREQUENCY RADAR) ADJOINT SENSITIVITY ANALYSIS PE0602435N WU73-6414-02-5 |
spellingShingle |
Physical and Dynamic Oceanography Active & Passive Radar Detection & Equipment *CHUKCHI SEA *OBSERVATION *RADAR EQUATIONS HIGH FREQUENCY OCEAN CURRENTS OPTIMIZATION SENSITIVITY DATA ASSIMILATION HFR(HIGH FREQUENCY RADAR) ADJOINT SENSITIVITY ANALYSIS PE0602435N WU73-6414-02-5 Panteleev, Gleb Yaremchuk, Max Francis, Oceana Kikuchi, Takashi Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
topic_facet |
Physical and Dynamic Oceanography Active & Passive Radar Detection & Equipment *CHUKCHI SEA *OBSERVATION *RADAR EQUATIONS HIGH FREQUENCY OCEAN CURRENTS OPTIMIZATION SENSITIVITY DATA ASSIMILATION HFR(HIGH FREQUENCY RADAR) ADJOINT SENSITIVITY ANALYSIS PE0602435N WU73-6414-02-5 |
description |
In recent years, monitoring offshore surface circulation in the Arctic Ocean with high frequency radars has become an issue of increasing practical importance. In this study, radar positions are optimized by minimizing the reconstruction errors of the surface currents in the Southeastern Chukchi Sea. By means of an adjoint sensitivity technique it is shown that in the case of a pair of radars, their optimal (i.e. most favorable) location is at Kivalina, a settlement near the strongest outflow of the Alaskan Coastal Current from the monitored domain. The least favorable location is at Shishmaref, a settlement near relatively weak inflow into the region as observed from the coast. However, if two pairs of radars are available, the best locations are Kivalina and Shishmaref. The results are verified using observational system simulation experiments (OSSEs) performed in the framework of a 4-dimensional variational assimilation of simulated radar observations into a numerical model. It is shown that correct specification of the first guess solution is of primary importance for obtaining realistic results from both adjoint sensitivity analysis and OSSEs. This emphasizes the necessity of obtaining accurate high resolution climatologies for future ice-free offshore regions in the Arctic. The original document contains color images. Pulished in Polar Science, v7 p72-81, 24 Feb 2013. Prepared in cooperation with the International Arctic Research Center, University of Alaska, Fairbanks, the Department of Civil and Environmental Engineering, University of Hawaii at Manoa, and the Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan. |
author2 |
NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV |
format |
Text |
author |
Panteleev, Gleb Yaremchuk, Max Francis, Oceana Kikuchi, Takashi |
author_facet |
Panteleev, Gleb Yaremchuk, Max Francis, Oceana Kikuchi, Takashi |
author_sort |
Panteleev, Gleb |
title |
Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
title_short |
Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
title_full |
Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
title_fullStr |
Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
title_full_unstemmed |
Configuring High Frequency Radar Observations in the Southern Chukchi Sea |
title_sort |
configuring high frequency radar observations in the southern chukchi sea |
publishDate |
2013 |
url |
http://www.dtic.mil/docs/citations/ADA582636 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA582636 |
geographic |
Arctic Arctic Ocean Chukchi Sea Fairbanks |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Fairbanks |
genre |
Arctic Arctic Ocean Chukchi Chukchi Sea International Arctic Research Center Alaska |
genre_facet |
Arctic Arctic Ocean Chukchi Chukchi Sea International Arctic Research Center Alaska |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA582636 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766327917197918208 |