Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea
Mesoscale thermal structure and its spatial variability are very significant for acoustic propagation in the ocean. Therefore ocean thermal analysis procedures are important for the initialisation and verification of environmental and acoustical models. This study involved the implementation of soft...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1988
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA199977 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA199977 |
id |
ftdtic:ADA199977 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA199977 2023-05-15T16:27:21+02:00 Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea Grillaki-Steiert, D. Amoroso, V. SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY) 1988-07 text/html http://www.dtic.mil/docs/citations/ADA199977 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA199977 en eng http://www.dtic.mil/docs/citations/ADA199977 Approved for public release; distribution is unlimited. DTIC AND NTIS Physical and Dynamic Oceanography *OCEAN MODELS *UNDERWATER ACOUSTICS *SOUND TRANSMISSION SPATIAL DISTRIBUTION TEMPERATURE MODELS VARIATIONS PROFILES THERMAL ANALYSIS INTERPOLATION HIGH DENSITY GRAPHICS ITALY MATHEMATICS OCEANS CLIMATOLOGY OCEAN ENVIRONMENTS NORWEGIAN SEA GREENLAND SEA OCEANOGRAPHY EXTRAPOLATION CONTOURS DATA BASES ICELAND THERMAL PROPERTIES COMPUTER PROGRAMS LEVITUS CLIMATOLOGY GAUSS MARKOV PROCESSES ACOUSTIC PROPAGATION GAUSS MARKOV THEOREM GREENLAND ICELAND NORWEGIAN SEA MODELLING THERMAL VARIABILITY FOREIGN REPORTS Text 1988 ftdtic 2016-02-23T07:16:10Z Mesoscale thermal structure and its spatial variability are very significant for acoustic propagation in the ocean. Therefore ocean thermal analysis procedures are important for the initialisation and verification of environmental and acoustical models. This study involved the implementation of software, and the production, from irregularly-spaced data, of uniformly-gridded temperature fields for use by numerical acoustical and environmental models. The two analyses, considered for the production of temperature fields are: (1) an objective analysis method based on the Gauss-Markov Theorem which makes use of additional information such as climatology (the Levitus climatology has been used in this study), and (2) an interpolation method based on contouring techniques provided by the UNIRAS graphics package. Both methods agree well when there is a high density of data. When the data availability is limited, there is a danger that the objective analysis method can give rise to spurious gradients in going from the regime dominated by data to that dominated by climatology. Whether this is less desirable than a field based on extrapolation from a few observational data points depends on the application. Original contains color plates: All DTIC and NTIS reproductions will be in black and white. Text Greenland Greenland Sea Iceland Norwegian Sea Defense Technical Information Center: DTIC Technical Reports database Greenland Norwegian Sea |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography *OCEAN MODELS *UNDERWATER ACOUSTICS *SOUND TRANSMISSION SPATIAL DISTRIBUTION TEMPERATURE MODELS VARIATIONS PROFILES THERMAL ANALYSIS INTERPOLATION HIGH DENSITY GRAPHICS ITALY MATHEMATICS OCEANS CLIMATOLOGY OCEAN ENVIRONMENTS NORWEGIAN SEA GREENLAND SEA OCEANOGRAPHY EXTRAPOLATION CONTOURS DATA BASES ICELAND THERMAL PROPERTIES COMPUTER PROGRAMS LEVITUS CLIMATOLOGY GAUSS MARKOV PROCESSES ACOUSTIC PROPAGATION GAUSS MARKOV THEOREM GREENLAND ICELAND NORWEGIAN SEA MODELLING THERMAL VARIABILITY FOREIGN REPORTS |
spellingShingle |
Physical and Dynamic Oceanography *OCEAN MODELS *UNDERWATER ACOUSTICS *SOUND TRANSMISSION SPATIAL DISTRIBUTION TEMPERATURE MODELS VARIATIONS PROFILES THERMAL ANALYSIS INTERPOLATION HIGH DENSITY GRAPHICS ITALY MATHEMATICS OCEANS CLIMATOLOGY OCEAN ENVIRONMENTS NORWEGIAN SEA GREENLAND SEA OCEANOGRAPHY EXTRAPOLATION CONTOURS DATA BASES ICELAND THERMAL PROPERTIES COMPUTER PROGRAMS LEVITUS CLIMATOLOGY GAUSS MARKOV PROCESSES ACOUSTIC PROPAGATION GAUSS MARKOV THEOREM GREENLAND ICELAND NORWEGIAN SEA MODELLING THERMAL VARIABILITY FOREIGN REPORTS Grillaki-Steiert, D. Amoroso, V. Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
topic_facet |
Physical and Dynamic Oceanography *OCEAN MODELS *UNDERWATER ACOUSTICS *SOUND TRANSMISSION SPATIAL DISTRIBUTION TEMPERATURE MODELS VARIATIONS PROFILES THERMAL ANALYSIS INTERPOLATION HIGH DENSITY GRAPHICS ITALY MATHEMATICS OCEANS CLIMATOLOGY OCEAN ENVIRONMENTS NORWEGIAN SEA GREENLAND SEA OCEANOGRAPHY EXTRAPOLATION CONTOURS DATA BASES ICELAND THERMAL PROPERTIES COMPUTER PROGRAMS LEVITUS CLIMATOLOGY GAUSS MARKOV PROCESSES ACOUSTIC PROPAGATION GAUSS MARKOV THEOREM GREENLAND ICELAND NORWEGIAN SEA MODELLING THERMAL VARIABILITY FOREIGN REPORTS |
description |
Mesoscale thermal structure and its spatial variability are very significant for acoustic propagation in the ocean. Therefore ocean thermal analysis procedures are important for the initialisation and verification of environmental and acoustical models. This study involved the implementation of software, and the production, from irregularly-spaced data, of uniformly-gridded temperature fields for use by numerical acoustical and environmental models. The two analyses, considered for the production of temperature fields are: (1) an objective analysis method based on the Gauss-Markov Theorem which makes use of additional information such as climatology (the Levitus climatology has been used in this study), and (2) an interpolation method based on contouring techniques provided by the UNIRAS graphics package. Both methods agree well when there is a high density of data. When the data availability is limited, there is a danger that the objective analysis method can give rise to spurious gradients in going from the regime dominated by data to that dominated by climatology. Whether this is less desirable than a field based on extrapolation from a few observational data points depends on the application. Original contains color plates: All DTIC and NTIS reproductions will be in black and white. |
author2 |
SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY) |
format |
Text |
author |
Grillaki-Steiert, D. Amoroso, V. |
author_facet |
Grillaki-Steiert, D. Amoroso, V. |
author_sort |
Grillaki-Steiert, D. |
title |
Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
title_short |
Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
title_full |
Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
title_fullStr |
Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
title_full_unstemmed |
Analysis Systems for the Mesoscale Thermal Variability in the Greenland- Iceland-Norwegian Sea |
title_sort |
analysis systems for the mesoscale thermal variability in the greenland- iceland-norwegian sea |
publishDate |
1988 |
url |
http://www.dtic.mil/docs/citations/ADA199977 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA199977 |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Greenland Sea Iceland Norwegian Sea |
genre_facet |
Greenland Greenland Sea Iceland Norwegian Sea |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA199977 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766016504650792960 |