Impact of the Arctic observing systems on the ECCC global weather forecasts
Abstract This study examines the impact of the conventional (in situ) and satellite observing systems in the Arctic on forecasts in the Northern Hemisphere polar and midlatitude regions using the Canadian global forecast system. It is part of an international cooperation to understand the role and t...
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crwiley:10.1002/qj.4203 2024-09-30T14:29:44+00:00 Impact of the Arctic observing systems on the ECCC global weather forecasts Laroche, Stéphane Poan, Emmanuel D. Norges Forskningsråd 2021 http://dx.doi.org/10.1002/qj.4203 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4203 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4203 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4203 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 148, issue 742, page 252-271 ISSN 0035-9009 1477-870X journal-article 2021 crwiley https://doi.org/10.1002/qj.4203 2024-09-17T04:49:11Z Abstract This study examines the impact of the conventional (in situ) and satellite observing systems in the Arctic on forecasts in the Northern Hemisphere polar and midlatitude regions using the Canadian global forecast system. It is part of an international cooperation to understand the role and the relative importance of the polar observing systems in numerical prediction systems in order to make recommendations for future optimal observing network design in this area. Both Observing System Experiment and Forecast Sensitivity to Observation Impact methods are used to assess the relative importance of the observing systems north of 60°N. The experiments are conducted during winter 2017–2018 and summer 2018, which include the first two Special Observing Periods of the Year of Polar Prediction. The impact of supplementary radiosondes launched during these periods is also assessed. It is found that the joint impact of all Arctic satellite data on forecasts is two to four times larger than the impact of all conventional data in this area. The microwave sounders and the radiosonde network have the largest impact among the satellite and convention observing systems, respectively. The impact of the conventional data is larger than that of microwave sounders in both winter and summer seasons. The impact of the supplementary radiosondes on short‐range forecast in the Arctic is positive, but becomes negligible beyond 24 hr forecast lead‐time. The impact of observations in the Arctic on medium‐range forecasts in the midlatitudes is larger over eastern North America and northern Asia for both seasons examined. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Quarterly Journal of the Royal Meteorological Society 148 742 252 271 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract This study examines the impact of the conventional (in situ) and satellite observing systems in the Arctic on forecasts in the Northern Hemisphere polar and midlatitude regions using the Canadian global forecast system. It is part of an international cooperation to understand the role and the relative importance of the polar observing systems in numerical prediction systems in order to make recommendations for future optimal observing network design in this area. Both Observing System Experiment and Forecast Sensitivity to Observation Impact methods are used to assess the relative importance of the observing systems north of 60°N. The experiments are conducted during winter 2017–2018 and summer 2018, which include the first two Special Observing Periods of the Year of Polar Prediction. The impact of supplementary radiosondes launched during these periods is also assessed. It is found that the joint impact of all Arctic satellite data on forecasts is two to four times larger than the impact of all conventional data in this area. The microwave sounders and the radiosonde network have the largest impact among the satellite and convention observing systems, respectively. The impact of the conventional data is larger than that of microwave sounders in both winter and summer seasons. The impact of the supplementary radiosondes on short‐range forecast in the Arctic is positive, but becomes negligible beyond 24 hr forecast lead‐time. The impact of observations in the Arctic on medium‐range forecasts in the midlatitudes is larger over eastern North America and northern Asia for both seasons examined. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Laroche, Stéphane Poan, Emmanuel D. |
spellingShingle |
Laroche, Stéphane Poan, Emmanuel D. Impact of the Arctic observing systems on the ECCC global weather forecasts |
author_facet |
Laroche, Stéphane Poan, Emmanuel D. |
author_sort |
Laroche, Stéphane |
title |
Impact of the Arctic observing systems on the ECCC global weather forecasts |
title_short |
Impact of the Arctic observing systems on the ECCC global weather forecasts |
title_full |
Impact of the Arctic observing systems on the ECCC global weather forecasts |
title_fullStr |
Impact of the Arctic observing systems on the ECCC global weather forecasts |
title_full_unstemmed |
Impact of the Arctic observing systems on the ECCC global weather forecasts |
title_sort |
impact of the arctic observing systems on the eccc global weather forecasts |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/qj.4203 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4203 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4203 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4203 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 148, issue 742, page 252-271 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.4203 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
148 |
container_issue |
742 |
container_start_page |
252 |
op_container_end_page |
271 |
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1811634946346844160 |