Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations
This study investigated the impact of radiosonde observations from the Southern Ocean obtained by the Australian R/V Aurora Australis on the ALERA2 experimental ensemble reanalysis data set and ensemble forecast experiment. An observing system experiment (OSE) that included additional ship‐launched...
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Online Access: | https://doi.org/10.1029/2018GL079037 http://ecite.utas.edu.au/134987 |
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ftunivtasecite:oai:ecite.utas.edu.au:134987 2023-05-15T15:33:49+02:00 Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations Sato, K Inoue, J Alexander, SP McFarquhar, G Yamazaki, A 2018 application/pdf https://doi.org/10.1029/2018GL079037 http://ecite.utas.edu.au/134987 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/134987/1/134987 - Improved reanalysis and prediction of atmospheric fields.pdf http://dx.doi.org/10.1029/2018GL079037 Sato, K and Inoue, J and Alexander, SP and McFarquhar, G and Yamazaki, A, Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations, Geophysical Research Letters, 45, (20) pp. 11,406-11,413. ISSN 0094-8276 (2018) [Refereed Article] http://ecite.utas.edu.au/134987 Earth Sciences Atmospheric Sciences Atmospheric Dynamics Refereed Article PeerReviewed 2018 ftunivtasecite https://doi.org/10.1029/2018GL079037 2019-12-13T22:32:37Z This study investigated the impact of radiosonde observations from the Southern Ocean obtained by the Australian R/V Aurora Australis on the ALERA2 experimental ensemble reanalysis data set and ensemble forecast experiment. An observing system experiment (OSE) that included additional ship‐launched radiosonde data captured the atmospheric structure over the Southern Ocean. ALERA2 without additional radiosondes had positive temperature biases exceeding 7C in the upper troposphere when low‐pressure cyclonic systems passed over the ship. The spread in the upper level was reduced by 15% in the OSE, which propagated downstream from the ship's position because of the sparse observing network over southern high latitudes. Comparison of two 63‐member ensemble forecast experiments initialized by ALERA2 and the OSE revealed that prediction of midlatitude cyclone tracks was improved by the realistic representation of upper‐level troughs in the OSE forecast. This confirms that additional radiosondes over the Southern Ocean reduce uncertainty and error in midlatitude cyclone forecasts. Article in Journal/Newspaper aurora australis Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Geophysical Research Letters 45 20 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics |
spellingShingle |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics Sato, K Inoue, J Alexander, SP McFarquhar, G Yamazaki, A Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
topic_facet |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics |
description |
This study investigated the impact of radiosonde observations from the Southern Ocean obtained by the Australian R/V Aurora Australis on the ALERA2 experimental ensemble reanalysis data set and ensemble forecast experiment. An observing system experiment (OSE) that included additional ship‐launched radiosonde data captured the atmospheric structure over the Southern Ocean. ALERA2 without additional radiosondes had positive temperature biases exceeding 7C in the upper troposphere when low‐pressure cyclonic systems passed over the ship. The spread in the upper level was reduced by 15% in the OSE, which propagated downstream from the ship's position because of the sparse observing network over southern high latitudes. Comparison of two 63‐member ensemble forecast experiments initialized by ALERA2 and the OSE revealed that prediction of midlatitude cyclone tracks was improved by the realistic representation of upper‐level troughs in the OSE forecast. This confirms that additional radiosondes over the Southern Ocean reduce uncertainty and error in midlatitude cyclone forecasts. |
format |
Article in Journal/Newspaper |
author |
Sato, K Inoue, J Alexander, SP McFarquhar, G Yamazaki, A |
author_facet |
Sato, K Inoue, J Alexander, SP McFarquhar, G Yamazaki, A |
author_sort |
Sato, K |
title |
Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
title_short |
Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
title_full |
Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
title_fullStr |
Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
title_full_unstemmed |
Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations |
title_sort |
improved reanalysis and prediction of atmospheric fields over the southern ocean using campaign-based radiosonde observations |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2018 |
url |
https://doi.org/10.1029/2018GL079037 http://ecite.utas.edu.au/134987 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
aurora australis Southern Ocean |
genre_facet |
aurora australis Southern Ocean |
op_relation |
http://ecite.utas.edu.au/134987/1/134987 - Improved reanalysis and prediction of atmospheric fields.pdf http://dx.doi.org/10.1029/2018GL079037 Sato, K and Inoue, J and Alexander, SP and McFarquhar, G and Yamazaki, A, Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations, Geophysical Research Letters, 45, (20) pp. 11,406-11,413. ISSN 0094-8276 (2018) [Refereed Article] http://ecite.utas.edu.au/134987 |
op_doi |
https://doi.org/10.1029/2018GL079037 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
20 |
_version_ |
1766364415314100224 |