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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2018
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ftunivtasmania:oai:eprints.utas.edu.au:31543 2023-05-15T13:31:53+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://eprints.utas.edu.au/31543/ https://eprints.utas.edu.au/31543/1/134987%20-%20Improved%20reanalysis%20and%20prediction%20of%20atmospheric%20fields.pdf en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/31543/1/134987%20-%20Improved%20reanalysis%20and%20prediction%20of%20atmospheric%20fields.pdf Sato, K, Inoue, J, Alexander, SP, McFarquhar, G and Yamazaki, A 2018 , 'Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations' , Geophysical Research Letters, vol. 45, no. 20 , 11,406-11,413 , doi:10.1029/2018GL079037 <http://dx.doi.org/10.1029/2018GL079037>. Southern Ocean radiosonde weather forecast Antarctica Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1029/2018GL079037 2021-09-20T22:17:57Z 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 7 °C 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 Antarc* Antarctica aurora australis Southern Ocean University of Tasmania: UTas ePrints Southern Ocean Geophysical Research Letters 45 20 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean radiosonde weather forecast Antarctica |
spellingShingle |
Southern Ocean radiosonde weather forecast Antarctica 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 |
Southern Ocean radiosonde weather forecast Antarctica |
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 7 °C 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://eprints.utas.edu.au/31543/ https://eprints.utas.edu.au/31543/1/134987%20-%20Improved%20reanalysis%20and%20prediction%20of%20atmospheric%20fields.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica aurora australis Southern Ocean |
genre_facet |
Antarc* Antarctica aurora australis Southern Ocean |
op_relation |
https://eprints.utas.edu.au/31543/1/134987%20-%20Improved%20reanalysis%20and%20prediction%20of%20atmospheric%20fields.pdf Sato, K, Inoue, J, Alexander, SP, McFarquhar, G and Yamazaki, A 2018 , 'Improved reanalysis and prediction of atmospheric fields over the Southern Ocean using campaign-based radiosonde observations' , Geophysical Research Letters, vol. 45, no. 20 , 11,406-11,413 , doi:10.1029/2018GL079037 <http://dx.doi.org/10.1029/2018GL079037>. |
op_doi |
https://doi.org/10.1029/2018GL079037 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
20 |
_version_ |
1766022076594913280 |