The Response of the Stratospheric Climate to Projected Changes in the Concentrations of Well-Mixed Greenhouse Gases from 1992 to 2051.
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| Title: | The Response of the Stratospheric Climate to Projected Changes in the Concentrations of Well-Mixed Greenhouse Gases from 1992 to 2051. |
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| Authors: | Butchart, Neal, Austin, John, Knight, Jeffrey R., Scaife, Adam A., Gallani, Mark L. |
| Source: | Journal of Climate. 7/1/2000, Vol. 13 Issue 13, p2142. 18p. 2 Black and White Photographs, 32 Graphs. |
| Subjects: | Stratosphere, Climate change, Greenhouse gases |
| Abstract: | Results are presented from two 60-yr integrations of the troposphere-stratosphere configuration of the U.K. Met. Office's Unified Model. The integrations were set up identically, apart from different initial conditions, which, nonetheless, were both representative of the early 1990s. Radiative heating rates were calculated using the IS92A projected concentrations of the well-mixed greenhouse gases (GHGs) given by the Intergovernmental Panel on Climate Change, but changes in stratospheric ozone and water vapor were not included. Sea surface conditions were taken from a separate coupled ocean-atmosphere experiment. Both integrations reproduced the familiar pattern of tropospheric warming and a stratospheric cooling increasing with height to about -1.4 K per decade at 1 mb. There was good agreement in the trends apart from in the polar upper stratosphere and, to a greater extent, the polar lower-to-middle stratosphere, where there is significant interannual variability during the winter months. Even after decadal smoothing, the trends in the northern winter were still overshadowed by the variability resulting from the planetary wave forcing from the troposphere. In general, the decadal variability of the Northern Hemisphere stratosphere was not a manifestation of a uniform change throughout each winter but, as with other models, there was a change in the frequency of occurrence of sudden stratospheric warmings. Unlike previous studies, the different results from the two simulations confirm the change in frequency of warmings was due to internal atmospheric variability and not the prescribed changes in GHG concentrations or sea surface conditions. In the southern winter stratosphere the flux of wave activity from the troposphere increased, but any additional dynamical heating was more than offset by the extra radiative cooling from the growing total GHG concentration. Consequently the polar vortex became more stable, with the spring breakdown delayed... [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Climate is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 5579413 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Response of the Stratospheric Climate to Projected Changes in the Concentrations of Well-Mixed Greenhouse Gases from 1992 to 2051. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Butchart%2C+Neal%22">Butchart, Neal</searchLink><br /><searchLink fieldCode="AR" term="%22Austin%2C+John%22">Austin, John</searchLink><br /><searchLink fieldCode="AR" term="%22Knight%2C+Jeffrey+R%2E%22">Knight, Jeffrey R.</searchLink><br /><searchLink fieldCode="AR" term="%22Scaife%2C+Adam+A%2E%22">Scaife, Adam A.</searchLink><br /><searchLink fieldCode="AR" term="%22Gallani%2C+Mark+L%2E%22">Gallani, Mark L.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Climate%22">Journal of Climate</searchLink>. 7/1/2000, Vol. 13 Issue 13, p2142. 18p. 2 Black and White Photographs, 32 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Stratosphere%22">Stratosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br /><searchLink fieldCode="DE" term="%22Greenhouse+gases%22">Greenhouse gases</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Results are presented from two 60-yr integrations of the troposphere-stratosphere configuration of the U.K. Met. Office's Unified Model. The integrations were set up identically, apart from different initial conditions, which, nonetheless, were both representative of the early 1990s. Radiative heating rates were calculated using the IS92A projected concentrations of the well-mixed greenhouse gases (GHGs) given by the Intergovernmental Panel on Climate Change, but changes in stratospheric ozone and water vapor were not included. Sea surface conditions were taken from a separate coupled ocean-atmosphere experiment. Both integrations reproduced the familiar pattern of tropospheric warming and a stratospheric cooling increasing with height to about -1.4 K per decade at 1 mb. There was good agreement in the trends apart from in the polar upper stratosphere and, to a greater extent, the polar lower-to-middle stratosphere, where there is significant interannual variability during the winter months. Even after decadal smoothing, the trends in the northern winter were still overshadowed by the variability resulting from the planetary wave forcing from the troposphere. In general, the decadal variability of the Northern Hemisphere stratosphere was not a manifestation of a uniform change throughout each winter but, as with other models, there was a change in the frequency of occurrence of sudden stratospheric warmings. Unlike previous studies, the different results from the two simulations confirm the change in frequency of warmings was due to internal atmospheric variability and not the prescribed changes in GHG concentrations or sea surface conditions. In the southern winter stratosphere the flux of wave activity from the troposphere increased, but any additional dynamical heating was more than offset by the extra radiative cooling from the growing total GHG concentration. Consequently the polar vortex became more stable, with the spring breakdown delayed... [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Climate is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1175/1520-0442(2000)013<2142:TROTSC>2.0.CO;2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 2142 Subjects: – SubjectFull: Stratosphere Type: general – SubjectFull: Climate change Type: general – SubjectFull: Greenhouse gases Type: general Titles: – TitleFull: The Response of the Stratospheric Climate to Projected Changes in the Concentrations of Well-Mixed Greenhouse Gases from 1992 to 2051. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Butchart, Neal – PersonEntity: Name: NameFull: Austin, John – PersonEntity: Name: NameFull: Knight, Jeffrey R. – PersonEntity: Name: NameFull: Scaife, Adam A. – PersonEntity: Name: NameFull: Gallani, Mark L. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: 7/1/2000 Type: published Y: 2000 Identifiers: – Type: issn-print Value: 08948755 Numbering: – Type: volume Value: 13 – Type: issue Value: 13 Titles: – TitleFull: Journal of Climate Type: main |
| ResultId | 1 |
