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Revisiting Southern Hemisphere polar stratospheric temperature trends in WACCM: The role of dynamical forcing
The latest version of the Whole Atmosphere Community Climate Model (WACCM), which includes a new chemistry scheme and an updated parameterization of orographic gravity waves, produces temperature trends in the Antarctic lower stratosphere in excellent agreement with radiosonde observations for 1969–...
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| Published in: | Geophysical research letters 2017-04, Vol.44 (7), p.3402-3410 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c4763-f22c1a8a0926d0a352f1a06a2bddcda1ace52d22760345bbf40774ff5a5cde953 |
| container_end_page | 3410 |
| container_issue | 7 |
| container_start_page | 3402 |
| container_title | Geophysical research letters |
| container_volume | 44 |
| creator | Calvo, N. Garcia, R. R. Kinnison, D. E. |
| description | The latest version of the Whole Atmosphere Community Climate Model (WACCM), which includes a new chemistry scheme and an updated parameterization of orographic gravity waves, produces temperature trends in the Antarctic lower stratosphere in excellent agreement with radiosonde observations for 1969–1998 as regards magnitude, location, timing, and persistence. The maximum trend, reached in November at 100 hPa, is −4.4 ± 2.8 K decade−1, which is a third smaller than the largest trend in the previous version of WACCM. Comparison with a simulation without the updated orographic gravity wave parameterization, together with analysis of the model's thermodynamic budget, reveals that the reduced trend is due to the effects of a stronger Brewer‐Dobson circulation in the new simulations, which warms the polar cap. The effects are both direct (a trend in adiabatic warming in late spring) and indirect (a smaller trend in ozone, hence a smaller reduction in shortwave heating, due to the warmer environment).
Key Points
The latest version of WACCM produces temperature trends in the Antarctic lower stratosphere in excellent agreement with past radiosondes
The maximum trend is a third smaller than the largest trend in the previous version of WACCM
The trend is due to a stronger Brewer‐Dobson circulation and a warmer polar cap as a result of an updated parameterization of orographic gravity waves |
| doi_str_mv | 10.1002/2017GL072792 |
| format | article |
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Key Points
The latest version of WACCM produces temperature trends in the Antarctic lower stratosphere in excellent agreement with past radiosondes
The maximum trend is a third smaller than the largest trend in the previous version of WACCM
The trend is due to a stronger Brewer‐Dobson circulation and a warmer polar cap as a result of an updated parameterization of orographic gravity waves</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2017GL072792</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Antarctica ; Atmospheric chemistry ; Brewer‐Dobson circulation ; chemistry‐climate model ; Circulation ; Climate models ; Computer simulation ; Gravity waves ; Parametrization ; Radiosondes ; Stratosphere ; temperature trends ; Trends ; WACCM</subject><ispartof>Geophysical research letters, 2017-04, Vol.44 (7), p.3402-3410</ispartof><rights>2017. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4763-f22c1a8a0926d0a352f1a06a2bddcda1ace52d22760345bbf40774ff5a5cde953</citedby><cites>FETCH-LOGICAL-c4763-f22c1a8a0926d0a352f1a06a2bddcda1ace52d22760345bbf40774ff5a5cde953</cites><orcidid>0000-0002-3418-0834 ; 0000-0002-6963-4592</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2017GL072792$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2017GL072792$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,783,787,11526,27936,27937,46480,46904</link.rule.ids></links><search><creatorcontrib>Calvo, N.</creatorcontrib><creatorcontrib>Garcia, R. R.</creatorcontrib><creatorcontrib>Kinnison, D. E.</creatorcontrib><title>Revisiting Southern Hemisphere polar stratospheric temperature trends in WACCM: The role of dynamical forcing</title><title>Geophysical research letters</title><description>The latest version of the Whole Atmosphere Community Climate Model (WACCM), which includes a new chemistry scheme and an updated parameterization of orographic gravity waves, produces temperature trends in the Antarctic lower stratosphere in excellent agreement with radiosonde observations for 1969–1998 as regards magnitude, location, timing, and persistence. The maximum trend, reached in November at 100 hPa, is −4.4 ± 2.8 K decade−1, which is a third smaller than the largest trend in the previous version of WACCM. Comparison with a simulation without the updated orographic gravity wave parameterization, together with analysis of the model's thermodynamic budget, reveals that the reduced trend is due to the effects of a stronger Brewer‐Dobson circulation in the new simulations, which warms the polar cap. The effects are both direct (a trend in adiabatic warming in late spring) and indirect (a smaller trend in ozone, hence a smaller reduction in shortwave heating, due to the warmer environment).
Key Points
The latest version of WACCM produces temperature trends in the Antarctic lower stratosphere in excellent agreement with past radiosondes
The maximum trend is a third smaller than the largest trend in the previous version of WACCM
The trend is due to a stronger Brewer‐Dobson circulation and a warmer polar cap as a result of an updated parameterization of orographic gravity waves</description><subject>Antarctica</subject><subject>Atmospheric chemistry</subject><subject>Brewer‐Dobson circulation</subject><subject>chemistry‐climate model</subject><subject>Circulation</subject><subject>Climate models</subject><subject>Computer simulation</subject><subject>Gravity waves</subject><subject>Parametrization</subject><subject>Radiosondes</subject><subject>Stratosphere</subject><subject>temperature trends</subject><subject>Trends</subject><subject>WACCM</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqFkc1LxDAQxYMouH7c_AMCXjy4OknaZuNNFl2FFcEPPJZsOtFI29SkVfa_N-t6EA96msebH_N4DCEHDE4YAD_lwORsDpJLxTfIiKksG08A5CYZAaikuSy2yU6MrwAgQLARae7w3UXXu_aZ3vuhf8HQ0itsXOySRNr5Wgca-6B7_2U5Q3tsOkzGkPZ9wLaK1LX06Xw6vTmjDy9Ig6-RekurZasbZ3RNrQ8mReyRLavriPvfc5c8Xl48TK_G89vZ9fR8PjaZLMTYcm6YnmhQvKhAi5xbpqHQfFFVptJMG8x5xVMbEFm-WNgMpMyszXVuKlS52CVH67td8G8Dxr5MhQzWtW7RD7FkCjLOuGLsf3SipJCwRg9_oa9-CG0qsqKYkgqKVfbxmjLBxxjQll1wjQ7LkkG5elP5800J52v8w9W4_JMtZ3fzPC-YEJ9bGpNz</recordid><startdate>20170416</startdate><enddate>20170416</enddate><creator>Calvo, N.</creator><creator>Garcia, R. R.</creator><creator>Kinnison, D. E.</creator><general>John Wiley & Sons, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-3418-0834</orcidid><orcidid>https://orcid.org/0000-0002-6963-4592</orcidid></search><sort><creationdate>20170416</creationdate><title>Revisiting Southern Hemisphere polar stratospheric temperature trends in WACCM: The role of dynamical forcing</title><author>Calvo, N. ; Garcia, R. R. ; Kinnison, D. E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4763-f22c1a8a0926d0a352f1a06a2bddcda1ace52d22760345bbf40774ff5a5cde953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Antarctica</topic><topic>Atmospheric chemistry</topic><topic>Brewer‐Dobson circulation</topic><topic>chemistry‐climate model</topic><topic>Circulation</topic><topic>Climate models</topic><topic>Computer simulation</topic><topic>Gravity waves</topic><topic>Parametrization</topic><topic>Radiosondes</topic><topic>Stratosphere</topic><topic>temperature trends</topic><topic>Trends</topic><topic>WACCM</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Calvo, N.</creatorcontrib><creatorcontrib>Garcia, R. R.</creatorcontrib><creatorcontrib>Kinnison, D. E.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Calvo, N.</au><au>Garcia, R. R.</au><au>Kinnison, D. E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Revisiting Southern Hemisphere polar stratospheric temperature trends in WACCM: The role of dynamical forcing</atitle><jtitle>Geophysical research letters</jtitle><date>2017-04-16</date><risdate>2017</risdate><volume>44</volume><issue>7</issue><spage>3402</spage><epage>3410</epage><pages>3402-3410</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>The latest version of the Whole Atmosphere Community Climate Model (WACCM), which includes a new chemistry scheme and an updated parameterization of orographic gravity waves, produces temperature trends in the Antarctic lower stratosphere in excellent agreement with radiosonde observations for 1969–1998 as regards magnitude, location, timing, and persistence. The maximum trend, reached in November at 100 hPa, is −4.4 ± 2.8 K decade−1, which is a third smaller than the largest trend in the previous version of WACCM. Comparison with a simulation without the updated orographic gravity wave parameterization, together with analysis of the model's thermodynamic budget, reveals that the reduced trend is due to the effects of a stronger Brewer‐Dobson circulation in the new simulations, which warms the polar cap. The effects are both direct (a trend in adiabatic warming in late spring) and indirect (a smaller trend in ozone, hence a smaller reduction in shortwave heating, due to the warmer environment).
Key Points
The latest version of WACCM produces temperature trends in the Antarctic lower stratosphere in excellent agreement with past radiosondes
The maximum trend is a third smaller than the largest trend in the previous version of WACCM
The trend is due to a stronger Brewer‐Dobson circulation and a warmer polar cap as a result of an updated parameterization of orographic gravity waves</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2017GL072792</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-3418-0834</orcidid><orcidid>https://orcid.org/0000-0002-6963-4592</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2017-04, Vol.44 (7), p.3402-3410 |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1904212911 |
| source | Wiley-Blackwell AGU Digital Archive |
| subjects | Antarctica Atmospheric chemistry Brewer‐Dobson circulation chemistry‐climate model Circulation Climate models Computer simulation Gravity waves Parametrization Radiosondes Stratosphere temperature trends Trends WACCM |
| title | Revisiting Southern Hemisphere polar stratospheric temperature trends in WACCM: The role of dynamical forcing |
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