Snowball versus slushball Earth: Dynamic versus nondynamic sea ice?
Identifieur interne : 002530 ( Main/Exploration ); précédent : 002529; suivant : 002531Snowball versus slushball Earth: Dynamic versus nondynamic sea ice?
Auteurs : J. P. Lewis [Canada] ; A. J. Weaver [Canada] ; M. Eby [Canada]Source :
- Journal of Geophysical Research: Oceans [ 0148-0227 ] ; 2007-11.
Abstract
Modeling studies of the Neoproterozoic snowball Earth offer two variations for snowball conditions, the original “hard” snowball Earth where the ocean is completely covered by sea ice, and an alternate slushball Earth or “soft” snowball, where there is an equatorial oasis of open water. We use the University of Victoria Earth System Climate Model to show that the soft snowball result is only possible when dynamics are excluded from the sea ice component of the model. Using a purely thermodynamic sea ice component the soft snowball condition is stable, whereas with a dynamic and thermodynamic sea ice component it is not. As the behavior of dynamic sea ice largely depends on wind stress, we compare simulations using two different wind fields: a zonally averaged present‐day wind field and a wind field derived by a general circulation model, the Fast Ocean Atmosphere Model, using Neoproterozoic conditions. Another consequence of using dynamic sea ice is that the sea ice does not become sufficiently thick to flow under its own weight when there is open water; this suggests that sea glacier dynamics are not important for snowball inception.
Url:
DOI: 10.1029/2006JC004037
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001098
- to stream Istex, to step Curation: 001098
- to stream Istex, to step Checkpoint: 000A10
- to stream Main, to step Merge: 002773
- to stream Main, to step Curation: 002530
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Snowball versus slushball Earth: Dynamic versus nondynamic sea ice?</title><author><name sortKey="Lewis, J P" sort="Lewis, J P" uniqKey="Lewis J" first="J. P." last="Lewis">J. P. Lewis</name></author><author><name sortKey="Weaver, A J" sort="Weaver, A J" uniqKey="Weaver A" first="A. J." last="Weaver">A. J. Weaver</name></author><author><name sortKey="Eby, M" sort="Eby, M" uniqKey="Eby M" first="M." last="Eby">M. Eby</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C55A2A912F7E156B4B7B0220FE7ED9E96218A6FF</idno><date when="2007" year="2007">2007</date><idno type="doi">10.1029/2006JC004037</idno><idno type="url">https://api-v5.istex.fr/document/C55A2A912F7E156B4B7B0220FE7ED9E96218A6FF/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001098</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001098</idno><idno type="wicri:Area/Istex/Curation">001098</idno><idno type="wicri:Area/Istex/Checkpoint">000A10</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000A10</idno><idno type="wicri:doubleKey">0148-0227:2007:Lewis J:snowball:versus:slushball</idno><idno type="wicri:Area/Main/Merge">002773</idno><idno type="wicri:Area/Main/Curation">002530</idno><idno type="wicri:Area/Main/Exploration">002530</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Snowball versus slushball Earth: Dynamic versus nondynamic sea ice?</title><author><name sortKey="Lewis, J P" sort="Lewis, J P" uniqKey="Lewis J" first="J. P." last="Lewis">J. P. Lewis</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia</wicri:regionArea><wicri:noRegion>British Columbia</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Canada</country></affiliation></author><author><name sortKey="Weaver, A J" sort="Weaver, A J" uniqKey="Weaver A" first="A. J." last="Weaver">A. J. Weaver</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia</wicri:regionArea><wicri:noRegion>British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Eby, M" sort="Eby, M" uniqKey="Eby M" first="M." last="Eby">M. Eby</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia</wicri:regionArea><wicri:noRegion>British Columbia</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Oceans</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2007-11">2007-11</date><biblScope unit="volume">112</biblScope><biblScope unit="issue">C11</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">C55A2A912F7E156B4B7B0220FE7ED9E96218A6FF</idno><idno type="DOI">10.1029/2006JC004037</idno><idno type="ArticleID">2006JC004037</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Modeling studies of the Neoproterozoic snowball Earth offer two variations for snowball conditions, the original “hard” snowball Earth where the ocean is completely covered by sea ice, and an alternate slushball Earth or “soft” snowball, where there is an equatorial oasis of open water. We use the University of Victoria Earth System Climate Model to show that the soft snowball result is only possible when dynamics are excluded from the sea ice component of the model. Using a purely thermodynamic sea ice component the soft snowball condition is stable, whereas with a dynamic and thermodynamic sea ice component it is not. As the behavior of dynamic sea ice largely depends on wind stress, we compare simulations using two different wind fields: a zonally averaged present‐day wind field and a wind field derived by a general circulation model, the Fast Ocean Atmosphere Model, using Neoproterozoic conditions. Another consequence of using dynamic sea ice is that the sea ice does not become sufficiently thick to flow under its own weight when there is open water; this suggests that sea glacier dynamics are not important for snowball inception.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Lewis, J P" sort="Lewis, J P" uniqKey="Lewis J" first="J. P." last="Lewis">J. P. Lewis</name></noRegion><name sortKey="Eby, M" sort="Eby, M" uniqKey="Eby M" first="M." last="Eby">M. Eby</name><name sortKey="Lewis, J P" sort="Lewis, J P" uniqKey="Lewis J" first="J. P." last="Lewis">J. P. Lewis</name><name sortKey="Weaver, A J" sort="Weaver, A J" uniqKey="Weaver A" first="A. J." last="Weaver">A. J. Weaver</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002530 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002530 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Canada
|area= ParkinsonCanadaV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:C55A2A912F7E156B4B7B0220FE7ED9E96218A6FF
|texte= Snowball versus slushball Earth: Dynamic versus nondynamic sea ice?
}}
| This area was generated with Dilib version V0.6.29. |  |