Observation impact over the southern polar area during the Concordiasi field campaign
The impact of observations on analysis uncertainty and forecast performance was investigated for austral spring 2010 over the southern polar area for four different systems (NRL, GMAO, ECMWF and Météo‐France) at the time of the Concordiasi field experiment. The largest multi‐model variance in 500 hP...
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crwiley:10.1002/qj.2470 2024-06-02T07:58:39+00:00 Observation impact over the southern polar area during the Concordiasi field campaign Boullot, Nathalie Rabier, Florence Langland, Rolf Gelaro, Ron Cardinali, Carla Guidard, Vincent Bauer, Peter Doerenbecher, Alexis 2014 http://dx.doi.org/10.1002/qj.2470 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.2470 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2470 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.2470 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2470 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Quarterly Journal of the Royal Meteorological Society volume 142, issue 695, page 597-610 ISSN 0035-9009 1477-870X journal-article 2014 crwiley https://doi.org/10.1002/qj.2470 2024-05-03T10:52:50Z The impact of observations on analysis uncertainty and forecast performance was investigated for austral spring 2010 over the southern polar area for four different systems (NRL, GMAO, ECMWF and Météo‐France) at the time of the Concordiasi field experiment. The largest multi‐model variance in 500 hPa height analyses is found in the southern sub‐Antarctic oceanic region, where there are rapidly evolving weather systems, rapid forecast‐error growth, and fewer upper‐air wind observation data to constrain the analyses. The total impact of all observations on the model forecast was computed using the 24 h forecast sensitivity‐to‐observations diagnostic. Observation types that contribute most to the reduction of the forecast error are shown to be AMSU, IASI, AIRS, GPS‐RO, radiosonde, surface and atmospheric motion vector observations. For sounding data, radiosondes and dropsondes, one can note a large impact on the analysis and forecasts of temperature at low levels and a large impact of wind at high levels. Observing system experiments using the Concordiasi dropsondes show a large impact of the observations over the Antarctic plateau extending to lower latitudes with the forecast range, with the largest impact around 50–70°S. These experiments indicate there is a potential benefit from using radiance data better over land and sea‐ice and from innovative atmospheric motion vectors obtained from a combination of various satellites to fill the current data gaps and improve numerical weather prediction analyses in this region. Article in Journal/Newspaper Antarc* Antarctic Sea ice Wiley Online Library Antarctic Austral The Antarctic Quarterly Journal of the Royal Meteorological Society 142 695 597 610 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The impact of observations on analysis uncertainty and forecast performance was investigated for austral spring 2010 over the southern polar area for four different systems (NRL, GMAO, ECMWF and Météo‐France) at the time of the Concordiasi field experiment. The largest multi‐model variance in 500 hPa height analyses is found in the southern sub‐Antarctic oceanic region, where there are rapidly evolving weather systems, rapid forecast‐error growth, and fewer upper‐air wind observation data to constrain the analyses. The total impact of all observations on the model forecast was computed using the 24 h forecast sensitivity‐to‐observations diagnostic. Observation types that contribute most to the reduction of the forecast error are shown to be AMSU, IASI, AIRS, GPS‐RO, radiosonde, surface and atmospheric motion vector observations. For sounding data, radiosondes and dropsondes, one can note a large impact on the analysis and forecasts of temperature at low levels and a large impact of wind at high levels. Observing system experiments using the Concordiasi dropsondes show a large impact of the observations over the Antarctic plateau extending to lower latitudes with the forecast range, with the largest impact around 50–70°S. These experiments indicate there is a potential benefit from using radiance data better over land and sea‐ice and from innovative atmospheric motion vectors obtained from a combination of various satellites to fill the current data gaps and improve numerical weather prediction analyses in this region. |
format |
Article in Journal/Newspaper |
author |
Boullot, Nathalie Rabier, Florence Langland, Rolf Gelaro, Ron Cardinali, Carla Guidard, Vincent Bauer, Peter Doerenbecher, Alexis |
spellingShingle |
Boullot, Nathalie Rabier, Florence Langland, Rolf Gelaro, Ron Cardinali, Carla Guidard, Vincent Bauer, Peter Doerenbecher, Alexis Observation impact over the southern polar area during the Concordiasi field campaign |
author_facet |
Boullot, Nathalie Rabier, Florence Langland, Rolf Gelaro, Ron Cardinali, Carla Guidard, Vincent Bauer, Peter Doerenbecher, Alexis |
author_sort |
Boullot, Nathalie |
title |
Observation impact over the southern polar area during the Concordiasi field campaign |
title_short |
Observation impact over the southern polar area during the Concordiasi field campaign |
title_full |
Observation impact over the southern polar area during the Concordiasi field campaign |
title_fullStr |
Observation impact over the southern polar area during the Concordiasi field campaign |
title_full_unstemmed |
Observation impact over the southern polar area during the Concordiasi field campaign |
title_sort |
observation impact over the southern polar area during the concordiasi field campaign |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1002/qj.2470 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.2470 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2470 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.2470 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2470 |
geographic |
Antarctic Austral The Antarctic |
geographic_facet |
Antarctic Austral The Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 142, issue 695, page 597-610 ISSN 0035-9009 1477-870X |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/qj.2470 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
142 |
container_issue |
695 |
container_start_page |
597 |
op_container_end_page |
610 |
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1800742073839648768 |