Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets
Previous studies have shown that sea-ice drift effectively promote the onset of a globally ice-covered snowball climate for paleo Earth and for tidally locked planets around low-mass stars. Here, we investigate whether sea-ice drift can influence the stellar flux threshold for a snowball climate ons...
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ftdatacite:10.48550/arxiv.2007.11179 2023-05-15T18:16:11+02:00 Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets Yue, Wenshuo Yang, Jun 2020 https://dx.doi.org/10.48550/arxiv.2007.11179 https://arxiv.org/abs/2007.11179 unknown arXiv https://dx.doi.org/10.3847/2041-8213/aba264 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2007.11179 https://doi.org/10.3847/2041-8213/aba264 2022-03-10T15:30:53Z Previous studies have shown that sea-ice drift effectively promote the onset of a globally ice-covered snowball climate for paleo Earth and for tidally locked planets around low-mass stars. Here, we investigate whether sea-ice drift can influence the stellar flux threshold for a snowball climate onset on rapidly rotating aqua-planets around a Sun-like star. Using a fully coupled atmosphere--land--ocean--sea-ice model with turning on or off sea-ice drift, a circular orbit with no eccentricity (e=0) and an eccentric orbit (e=0.2) are examined. When sea-ice drift is turned off, the stellar flux threshold for the snowball onset is 1250--1275 and 1173--1199 W m^-2 for e=0 and 0.2, respectively. The difference is mainly due to the poleward retreat of sea ice and snow edges when the planet is close to the perihelion in the eccentric orbit. When sea-ice drift is turned on, the respective stellar flux threshold is 1335--1350 and 1250--1276 W m^-2. These mean that sea-ice drift increases the snowball onset threshold by ~80 W m^-2 for both e=0 and 0.2, promoting the formation of a snowball climate state. We further show that oceanic dynamics have a small effect, <26 W m^-2, on the snowball onset threshold. This is because oceanic heat transport becomes weaker and weaker as the sea ice edge is approaching the equator. These results imply that sea-ice dynamics are important for the climate of planets close to the outer edge of the habitable zone, but oceanic heat transport is less important. Article in Journal/Newspaper Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences Yue, Wenshuo Yang, Jun Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
description |
Previous studies have shown that sea-ice drift effectively promote the onset of a globally ice-covered snowball climate for paleo Earth and for tidally locked planets around low-mass stars. Here, we investigate whether sea-ice drift can influence the stellar flux threshold for a snowball climate onset on rapidly rotating aqua-planets around a Sun-like star. Using a fully coupled atmosphere--land--ocean--sea-ice model with turning on or off sea-ice drift, a circular orbit with no eccentricity (e=0) and an eccentric orbit (e=0.2) are examined. When sea-ice drift is turned off, the stellar flux threshold for the snowball onset is 1250--1275 and 1173--1199 W m^-2 for e=0 and 0.2, respectively. The difference is mainly due to the poleward retreat of sea ice and snow edges when the planet is close to the perihelion in the eccentric orbit. When sea-ice drift is turned on, the respective stellar flux threshold is 1335--1350 and 1250--1276 W m^-2. These mean that sea-ice drift increases the snowball onset threshold by ~80 W m^-2 for both e=0 and 0.2, promoting the formation of a snowball climate state. We further show that oceanic dynamics have a small effect, <26 W m^-2, on the snowball onset threshold. This is because oceanic heat transport becomes weaker and weaker as the sea ice edge is approaching the equator. These results imply that sea-ice dynamics are important for the climate of planets close to the outer edge of the habitable zone, but oceanic heat transport is less important. |
format |
Article in Journal/Newspaper |
author |
Yue, Wenshuo Yang, Jun |
author_facet |
Yue, Wenshuo Yang, Jun |
author_sort |
Yue, Wenshuo |
title |
Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
title_short |
Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
title_full |
Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
title_fullStr |
Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
title_full_unstemmed |
Effect of Sea-ice Drift on the Onset of Snowball Climate on Rapidly Rotating Aqua-planets |
title_sort |
effect of sea-ice drift on the onset of snowball climate on rapidly rotating aqua-planets |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2007.11179 https://arxiv.org/abs/2007.11179 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://dx.doi.org/10.3847/2041-8213/aba264 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2007.11179 https://doi.org/10.3847/2041-8213/aba264 |
_version_ |
1766189632713654272 |