Low-level jets over the Arctic Ocean during MOSAiC
We present an annual characterization of low-level jets (LLJs) over the Arctic Ocean using wind profiles from radiosondes launched during the Multidisciplinary drifting Observatory for the Study of Arctic Climate expedition, from October 2019 through September 2020. Our results show LLJs to be commo...
Published in: | Elementa: Science of the Anthropocene |
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ftawi:oai:epic.awi.de:57243 2024-09-15T17:51:13+00:00 Low-level jets over the Arctic Ocean during MOSAiC López-García, Vania Neely, Ryan R. Dahlke, Sandro Brooks, Ian M. 2022-09 application/pdf https://epic.awi.de/id/eprint/57243/ https://epic.awi.de/id/eprint/57243/1/elementa202200063.pdf https://doi.org/10.1525/elementa.2022.00063 https://hdl.handle.net/10013/epic.015195f2-7d38-485a-8b07-78ed05e72ccf unknown https://epic.awi.de/id/eprint/57243/1/elementa202200063.pdf López-García, V. , Neely, R. R. , Dahlke, S. orcid:0000-0002-0395-9597 and Brooks, I. M. (2022) Low-level jets over the Arctic Ocean during MOSAiC , Elementa: Science of the Anthropocene, 10 (1) . doi:10.1525/elementa.2022.00063 <https://doi.org/10.1525/elementa.2022.00063> , hdl:10013/epic.015195f2-7d38-485a-8b07-78ed05e72ccf EPIC3Elementa: Science of the Anthropocene, 10(1), ISSN: 2325-1026 Article peerRev 2022 ftawi https://doi.org/10.1525/elementa.2022.00063 2024-06-24T04:30:12Z We present an annual characterization of low-level jets (LLJs) over the Arctic Ocean using wind profiles from radiosondes launched during the Multidisciplinary drifting Observatory for the Study of Arctic Climate expedition, from October 2019 through September 2020. Our results show LLJs to be common throughout the entire year, with a mean annual frequency of occurrence of more than 40%, a typical height below 400 m, peaking at 120–180 m, and speed between 6 and 14 m s–1. Jet characteristics show some seasonal variability: During winter and the freeze-up period, they are more common and faster, with an average occurrence of 55% and speeds of 8–16 m s–1, while in summer and the transition period, they have a mean occurrence of 46% and speeds of 6–10 m s–1. They have a similar height all year, with a peak between 120 and 180 m. The ERA5 reanalysis shows a similar frequency of occurrence, but a 75 m high bias in altitude, and a small, 0.28 m s–1, slow bias in speed. The height biases are greater in the transition period, more than 130 m, while the bias in speed is similar all year. Examining jets in ERA5 over the full year and whole Arctic Ocean, we find that the frequency of occurrence depends strongly on both the season and the distance to the sea-ice edge. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Elementa: Science of the Anthropocene 10 1 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We present an annual characterization of low-level jets (LLJs) over the Arctic Ocean using wind profiles from radiosondes launched during the Multidisciplinary drifting Observatory for the Study of Arctic Climate expedition, from October 2019 through September 2020. Our results show LLJs to be common throughout the entire year, with a mean annual frequency of occurrence of more than 40%, a typical height below 400 m, peaking at 120–180 m, and speed between 6 and 14 m s–1. Jet characteristics show some seasonal variability: During winter and the freeze-up period, they are more common and faster, with an average occurrence of 55% and speeds of 8–16 m s–1, while in summer and the transition period, they have a mean occurrence of 46% and speeds of 6–10 m s–1. They have a similar height all year, with a peak between 120 and 180 m. The ERA5 reanalysis shows a similar frequency of occurrence, but a 75 m high bias in altitude, and a small, 0.28 m s–1, slow bias in speed. The height biases are greater in the transition period, more than 130 m, while the bias in speed is similar all year. Examining jets in ERA5 over the full year and whole Arctic Ocean, we find that the frequency of occurrence depends strongly on both the season and the distance to the sea-ice edge. |
format |
Article in Journal/Newspaper |
author |
López-García, Vania Neely, Ryan R. Dahlke, Sandro Brooks, Ian M. |
spellingShingle |
López-García, Vania Neely, Ryan R. Dahlke, Sandro Brooks, Ian M. Low-level jets over the Arctic Ocean during MOSAiC |
author_facet |
López-García, Vania Neely, Ryan R. Dahlke, Sandro Brooks, Ian M. |
author_sort |
López-García, Vania |
title |
Low-level jets over the Arctic Ocean during MOSAiC |
title_short |
Low-level jets over the Arctic Ocean during MOSAiC |
title_full |
Low-level jets over the Arctic Ocean during MOSAiC |
title_fullStr |
Low-level jets over the Arctic Ocean during MOSAiC |
title_full_unstemmed |
Low-level jets over the Arctic Ocean during MOSAiC |
title_sort |
low-level jets over the arctic ocean during mosaic |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/57243/ https://epic.awi.de/id/eprint/57243/1/elementa202200063.pdf https://doi.org/10.1525/elementa.2022.00063 https://hdl.handle.net/10013/epic.015195f2-7d38-485a-8b07-78ed05e72ccf |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
EPIC3Elementa: Science of the Anthropocene, 10(1), ISSN: 2325-1026 |
op_relation |
https://epic.awi.de/id/eprint/57243/1/elementa202200063.pdf López-García, V. , Neely, R. R. , Dahlke, S. orcid:0000-0002-0395-9597 and Brooks, I. M. (2022) Low-level jets over the Arctic Ocean during MOSAiC , Elementa: Science of the Anthropocene, 10 (1) . doi:10.1525/elementa.2022.00063 <https://doi.org/10.1525/elementa.2022.00063> , hdl:10013/epic.015195f2-7d38-485a-8b07-78ed05e72ccf |
op_doi |
https://doi.org/10.1525/elementa.2022.00063 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
10 |
container_issue |
1 |
_version_ |
1810293066520592384 |