The value of observations. III: Influence of weather regimes on targeting
Abstract This paper assesses the value of targeted observations over the North Atlantic Ocean for different meteorological flow regimes. It shows that during tropical cyclone activity and particularly tropical cyclone transition to extratropical characteristics, removing observations in sensitive re...
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crwiley:10.1002/qj.148 2024-09-15T18:23:16+00:00 The value of observations. III: Influence of weather regimes on targeting Cardinali, Carla Buizza, Roberto Kelly, Graeme Shapiro, Melvyn Thépaut, Jean‐Noël 2007 http://dx.doi.org/10.1002/qj.148 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.148 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.148 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 133, issue 628, page 1833-1842 ISSN 0035-9009 1477-870X journal-article 2007 crwiley https://doi.org/10.1002/qj.148 2024-07-18T04:26:40Z Abstract This paper assesses the value of targeted observations over the North Atlantic Ocean for different meteorological flow regimes. It shows that during tropical cyclone activity and particularly tropical cyclone transition to extratropical characteristics, removing observations in sensitive regions, indicated by singular vectors optimized on the 2‐day forecast over Europe, degrades the skill of a given forecast more so than excluding observations in randomly selected regions. The maximum downstream degradation computed in terms of spatially and temporally averaged root‐mean‐square error of 500 hPa geopotential height is about 13%, a value which is 6 times larger than when removing observations in randomly selected areas. The forecast impact for these selected periods, resulting from degrading the observational coverage in sensitive areas, was similar to the impact found (elsewhere in other weather forecast systems) for the observational targeting campaigns carried out over recent years, and it was larger than the average impact obtained by considering a larger set of cases covering various seasons. Copyright © 2007 Royal Meteorological Society Article in Journal/Newspaper North Atlantic Wiley Online Library Quarterly Journal of the Royal Meteorological Society 133 628 1833 1842 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract This paper assesses the value of targeted observations over the North Atlantic Ocean for different meteorological flow regimes. It shows that during tropical cyclone activity and particularly tropical cyclone transition to extratropical characteristics, removing observations in sensitive regions, indicated by singular vectors optimized on the 2‐day forecast over Europe, degrades the skill of a given forecast more so than excluding observations in randomly selected regions. The maximum downstream degradation computed in terms of spatially and temporally averaged root‐mean‐square error of 500 hPa geopotential height is about 13%, a value which is 6 times larger than when removing observations in randomly selected areas. The forecast impact for these selected periods, resulting from degrading the observational coverage in sensitive areas, was similar to the impact found (elsewhere in other weather forecast systems) for the observational targeting campaigns carried out over recent years, and it was larger than the average impact obtained by considering a larger set of cases covering various seasons. Copyright © 2007 Royal Meteorological Society |
format |
Article in Journal/Newspaper |
author |
Cardinali, Carla Buizza, Roberto Kelly, Graeme Shapiro, Melvyn Thépaut, Jean‐Noël |
spellingShingle |
Cardinali, Carla Buizza, Roberto Kelly, Graeme Shapiro, Melvyn Thépaut, Jean‐Noël The value of observations. III: Influence of weather regimes on targeting |
author_facet |
Cardinali, Carla Buizza, Roberto Kelly, Graeme Shapiro, Melvyn Thépaut, Jean‐Noël |
author_sort |
Cardinali, Carla |
title |
The value of observations. III: Influence of weather regimes on targeting |
title_short |
The value of observations. III: Influence of weather regimes on targeting |
title_full |
The value of observations. III: Influence of weather regimes on targeting |
title_fullStr |
The value of observations. III: Influence of weather regimes on targeting |
title_full_unstemmed |
The value of observations. III: Influence of weather regimes on targeting |
title_sort |
value of observations. iii: influence of weather regimes on targeting |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/qj.148 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.148 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.148 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 133, issue 628, page 1833-1842 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.148 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
133 |
container_issue |
628 |
container_start_page |
1833 |
op_container_end_page |
1842 |
_version_ |
1810463433698574336 |