Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing
Variation in solar irradiance is considered an important factor in natural climate forcing. Variations in the solar UV in particular are now regarded as a major source of decadal variability in the stratosphere, influencing surface climate through stratosphere–troposphere coupling. However, by analy...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/508485/ https://nora.nerc.ac.uk/id/eprint/508485/1/fphy-02-00025.pdf https://doi.org/10.3389/fphy.2014.00025 |
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ftnerc:oai:nora.nerc.ac.uk:508485 2023-05-15T18:02:15+02:00 Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing Seppala, Annika Clilverd, Mark A. 2014-04-24 text http://nora.nerc.ac.uk/id/eprint/508485/ https://nora.nerc.ac.uk/id/eprint/508485/1/fphy-02-00025.pdf https://doi.org/10.3389/fphy.2014.00025 en eng https://nora.nerc.ac.uk/id/eprint/508485/1/fphy-02-00025.pdf Seppala, Annika; Clilverd, Mark A. orcid:0000-0002-7388-1529 . 2014 Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing. Frontiers in Physics, 2, 25. 6, pp. https://doi.org/10.3389/fphy.2014.00025 <https://doi.org/10.3389/fphy.2014.00025> cc_by CC-BY Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.3389/fphy.2014.00025 2023-02-04T19:40:20Z Variation in solar irradiance is considered an important factor in natural climate forcing. Variations in the solar UV in particular are now regarded as a major source of decadal variability in the stratosphere, influencing surface climate through stratosphere–troposphere coupling. However, by analyzing meteorological re-analysis data we find that the magnitude of the solar controlled energetic particle forcing signal in stratospheric zonal mean zonal winds and polar temperatures is equivalent to those arising from solar irradiance variations during the Northern Hemisphere polar winter months. We find that energetic particle forcing drives warmer polar upper stratospheric temperatures from early winter leading to an anomalously strong polar night jet via modulation of the vertical temperature gradient. By midwinter the stratosphere–troposphere coupling pathway becomes analogous to the solar UV impact at high latitudes. This not only highlights the importance of the energetic particle forcing contribution to stratospheric circulation, but enables us to understand the pathways responsible for the previously reported energetic particle forcing impacts on the troposphere in terms of the coupling of solar UV forcing to dynamics in the latter part of the winter. Article in Journal/Newspaper polar night Natural Environment Research Council: NERC Open Research Archive Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Frontiers in Physics 2 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
Variation in solar irradiance is considered an important factor in natural climate forcing. Variations in the solar UV in particular are now regarded as a major source of decadal variability in the stratosphere, influencing surface climate through stratosphere–troposphere coupling. However, by analyzing meteorological re-analysis data we find that the magnitude of the solar controlled energetic particle forcing signal in stratospheric zonal mean zonal winds and polar temperatures is equivalent to those arising from solar irradiance variations during the Northern Hemisphere polar winter months. We find that energetic particle forcing drives warmer polar upper stratospheric temperatures from early winter leading to an anomalously strong polar night jet via modulation of the vertical temperature gradient. By midwinter the stratosphere–troposphere coupling pathway becomes analogous to the solar UV impact at high latitudes. This not only highlights the importance of the energetic particle forcing contribution to stratospheric circulation, but enables us to understand the pathways responsible for the previously reported energetic particle forcing impacts on the troposphere in terms of the coupling of solar UV forcing to dynamics in the latter part of the winter. |
format |
Article in Journal/Newspaper |
author |
Seppala, Annika Clilverd, Mark A. |
spellingShingle |
Seppala, Annika Clilverd, Mark A. Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
author_facet |
Seppala, Annika Clilverd, Mark A. |
author_sort |
Seppala, Annika |
title |
Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
title_short |
Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
title_full |
Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
title_fullStr |
Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
title_full_unstemmed |
Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing |
title_sort |
energetic particle forcing of the northern hemisphere winter stratosphere: comparison to solar irradiance forcing |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/508485/ https://nora.nerc.ac.uk/id/eprint/508485/1/fphy-02-00025.pdf https://doi.org/10.3389/fphy.2014.00025 |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Midwinter |
geographic_facet |
Midwinter |
genre |
polar night |
genre_facet |
polar night |
op_relation |
https://nora.nerc.ac.uk/id/eprint/508485/1/fphy-02-00025.pdf Seppala, Annika; Clilverd, Mark A. orcid:0000-0002-7388-1529 . 2014 Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing. Frontiers in Physics, 2, 25. 6, pp. https://doi.org/10.3389/fphy.2014.00025 <https://doi.org/10.3389/fphy.2014.00025> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fphy.2014.00025 |
container_title |
Frontiers in Physics |
container_volume |
2 |
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1766172048925655040 |