Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013
We investigate possible impact of stratospheric sudden warmings (SSWs) on the thermosphere by using long‐term data of the global average thermospheric total mass density derived from satellite orbital drag during 1967–2013. Residuals are analyzed between the data and empirical Global Average Mass De...
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| Veröffentlicht in: | Geophysical research letters 2015-08, Vol.42 (15), p.6180-6188 |
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| container_title | Geophysical research letters |
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| creator | Yamazaki, Yosuke Kosch, Michael J. Emmert, John T. |
| description | We investigate possible impact of stratospheric sudden warmings (SSWs) on the thermosphere by using long‐term data of the global average thermospheric total mass density derived from satellite orbital drag during 1967–2013. Residuals are analyzed between the data and empirical Global Average Mass Density Model (GAMDM) that takes into account density variability due to solar activity, season, geomagnetic activity, and long‐term trend. A superposed epoch analysis of 37 SSW events reveals a density reduction of 3–7% at 250–575 km around the time of maximum polar vortex weakening. The relative density perturbation is found to be greater at higher altitudes. The temperature perturbation is estimated to be −7.0 K at 400 km. We show that the density reduction can arise from enhanced wave forcing from the lower atmosphere.
Key Points
A statistical analysis is performed for SSW effects on the thermosphere
A significant density reduction is revealed during SSWs
We suggest wave forcing from the lower atmosphere as a possible mechanism |
| doi_str_mv | 10.1002/2015GL065395 |
| format | Article |
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Key Points
A statistical analysis is performed for SSW effects on the thermosphere
A significant density reduction is revealed during SSWs
We suggest wave forcing from the lower atmosphere as a possible mechanism</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2015GL065395</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Atmosphere ; Climate change ; Data ; Data processing ; Decay ; Density ; Drag ; Empirical analysis ; Fluid flow ; Geomagnetic activity ; Geomagnetism ; Geophysics ; Global warming ; Loads (forces) ; Lower atmosphere ; Mass ; Meteorology ; Orbitals ; Perturbation methods ; Polar vortex ; polar vortex weakening ; Reduction ; Relative density ; satellite drag ; Satellites ; Solar activity ; Stratosphere ; stratospheric sudden warming ; Temperature ; Temperature effects ; Thermosphere ; total mass density ; Upper thermosphere ; Variability ; vertical atmospheric coupling ; Vortices</subject><ispartof>Geophysical research letters, 2015-08, Vol.42 (15), p.6180-6188</ispartof><rights>2015. The Authors.</rights><rights>2015. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c6120-f2478ad73655db8ae9bb3ea05b1a6a266a2f43ad6d1170406be8dbefc930a90f3</citedby><cites>FETCH-LOGICAL-c6120-f2478ad73655db8ae9bb3ea05b1a6a266a2f43ad6d1170406be8dbefc930a90f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2015GL065395$$EPDF$$P50$$Gwiley$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2015GL065395$$EHTML$$P50$$Gwiley$$Hfree_for_read</linktohtml><link.rule.ids>314,778,782,1414,1430,11497,27907,27908,45557,45558,46392,46451,46816,46875</link.rule.ids></links><search><creatorcontrib>Yamazaki, Yosuke</creatorcontrib><creatorcontrib>Kosch, Michael J.</creatorcontrib><creatorcontrib>Emmert, John T.</creatorcontrib><title>Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>We investigate possible impact of stratospheric sudden warmings (SSWs) on the thermosphere by using long‐term data of the global average thermospheric total mass density derived from satellite orbital drag during 1967–2013. Residuals are analyzed between the data and empirical Global Average Mass Density Model (GAMDM) that takes into account density variability due to solar activity, season, geomagnetic activity, and long‐term trend. A superposed epoch analysis of 37 SSW events reveals a density reduction of 3–7% at 250–575 km around the time of maximum polar vortex weakening. The relative density perturbation is found to be greater at higher altitudes. The temperature perturbation is estimated to be −7.0 K at 400 km. We show that the density reduction can arise from enhanced wave forcing from the lower atmosphere.
Key Points
A statistical analysis is performed for SSW effects on the thermosphere
A significant density reduction is revealed during SSWs
We suggest wave forcing from the lower atmosphere as a possible mechanism</description><subject>Atmosphere</subject><subject>Climate change</subject><subject>Data</subject><subject>Data processing</subject><subject>Decay</subject><subject>Density</subject><subject>Drag</subject><subject>Empirical analysis</subject><subject>Fluid flow</subject><subject>Geomagnetic activity</subject><subject>Geomagnetism</subject><subject>Geophysics</subject><subject>Global warming</subject><subject>Loads (forces)</subject><subject>Lower atmosphere</subject><subject>Mass</subject><subject>Meteorology</subject><subject>Orbitals</subject><subject>Perturbation methods</subject><subject>Polar vortex</subject><subject>polar vortex weakening</subject><subject>Reduction</subject><subject>Relative density</subject><subject>satellite drag</subject><subject>Satellites</subject><subject>Solar activity</subject><subject>Stratosphere</subject><subject>stratospheric sudden warming</subject><subject>Temperature</subject><subject>Temperature effects</subject><subject>Thermosphere</subject><subject>total mass density</subject><subject>Upper thermosphere</subject><subject>Variability</subject><subject>vertical atmospheric coupling</subject><subject>Vortices</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><recordid>eNqNkctu1TAQQCMEEpfSHR9giQ0LAuNH7HgJfdwiXVEJgcrOcuIxTckL22m5P8B346sghFhUXVgeac6ZGXuK4gWFNxSAvWVAq-0OZMV19ajYUC1EWQOox8UGQOeYKfm0eBbjDQBw4HRT_Dq77RyOLRI_BRJTsGmK8zWGriVxcTlF7mwYuvEbQe-xTZFMI0nXSJZ5xnCIwrAaSFzWbtERH6aBRJuw77uEZApNl2yf063dE2eTJW4Jh5JUS1Xmqfnz4om3fcTjP_dR8eX87PPJRbm73H44ebcrW0kZlJ4JVVunuKwq19QWddNwtFA11ErLZD5ecOuko1SBANlg7Rr0reZgNXh-VLxa685h-rFgTGboYpvntCNOSzRUCSE1g1o8AM2wzv9KM_ryP_RmWsKYH2KoplDXQil1L6VACaCSH9q-Xqk2TDEG9GYO3WDD3lAwhy2bf7eccbbid12P-3tZs_20qzhTkKVylbqY8OdfyYbvRiquKnP1cWvOv74HccqUueC_AfSJtlk</recordid><startdate>20150816</startdate><enddate>20150816</enddate><creator>Yamazaki, Yosuke</creator><creator>Kosch, Michael J.</creator><creator>Emmert, John T.</creator><general>Blackwell Publishing Ltd</general><general>John Wiley & Sons, Inc</general><scope>BSCLL</scope><scope>24P</scope><scope>WIN</scope><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><scope>7UA</scope><scope>C1K</scope></search><sort><creationdate>20150816</creationdate><title>Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013</title><author>Yamazaki, Yosuke ; Kosch, Michael J. ; Emmert, John T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c6120-f2478ad73655db8ae9bb3ea05b1a6a266a2f43ad6d1170406be8dbefc930a90f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Atmosphere</topic><topic>Climate change</topic><topic>Data</topic><topic>Data processing</topic><topic>Decay</topic><topic>Density</topic><topic>Drag</topic><topic>Empirical analysis</topic><topic>Fluid flow</topic><topic>Geomagnetic activity</topic><topic>Geomagnetism</topic><topic>Geophysics</topic><topic>Global warming</topic><topic>Loads (forces)</topic><topic>Lower atmosphere</topic><topic>Mass</topic><topic>Meteorology</topic><topic>Orbitals</topic><topic>Perturbation methods</topic><topic>Polar vortex</topic><topic>polar vortex weakening</topic><topic>Reduction</topic><topic>Relative density</topic><topic>satellite drag</topic><topic>Satellites</topic><topic>Solar activity</topic><topic>Stratosphere</topic><topic>stratospheric sudden warming</topic><topic>Temperature</topic><topic>Temperature effects</topic><topic>Thermosphere</topic><topic>total mass density</topic><topic>Upper thermosphere</topic><topic>Variability</topic><topic>vertical atmospheric coupling</topic><topic>Vortices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yamazaki, Yosuke</creatorcontrib><creatorcontrib>Kosch, Michael J.</creatorcontrib><creatorcontrib>Emmert, John T.</creatorcontrib><collection>Istex</collection><collection>Wiley Online Library Open Access</collection><collection>Wiley Online Library Free Content</collection><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><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yamazaki, Yosuke</au><au>Kosch, Michael J.</au><au>Emmert, John T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2015-08-16</date><risdate>2015</risdate><volume>42</volume><issue>15</issue><spage>6180</spage><epage>6188</epage><pages>6180-6188</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We investigate possible impact of stratospheric sudden warmings (SSWs) on the thermosphere by using long‐term data of the global average thermospheric total mass density derived from satellite orbital drag during 1967–2013. Residuals are analyzed between the data and empirical Global Average Mass Density Model (GAMDM) that takes into account density variability due to solar activity, season, geomagnetic activity, and long‐term trend. A superposed epoch analysis of 37 SSW events reveals a density reduction of 3–7% at 250–575 km around the time of maximum polar vortex weakening. The relative density perturbation is found to be greater at higher altitudes. The temperature perturbation is estimated to be −7.0 K at 400 km. We show that the density reduction can arise from enhanced wave forcing from the lower atmosphere.
Key Points
A statistical analysis is performed for SSW effects on the thermosphere
A significant density reduction is revealed during SSWs
We suggest wave forcing from the lower atmosphere as a possible mechanism</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/2015GL065395</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; Wiley-Blackwell AGU Digital Library; EZB-FREE-00999 freely available EZB journals |
| subjects | Atmosphere Climate change Data Data processing Decay Density Drag Empirical analysis Fluid flow Geomagnetic activity Geomagnetism Geophysics Global warming Loads (forces) Lower atmosphere Mass Meteorology Orbitals Perturbation methods Polar vortex polar vortex weakening Reduction Relative density satellite drag Satellites Solar activity Stratosphere stratospheric sudden warming Temperature Temperature effects Thermosphere total mass density Upper thermosphere Variability vertical atmospheric coupling Vortices |
| title | Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013 |
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