Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events
This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere-lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain of eight SuperDARN radars at high northern latitudes that span longitudes from...
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description | This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere-lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain of eight SuperDARN radars at high northern latitudes that span longitudes from 150\(^{\circ}\) W to 25\(^{\circ}\) E and latitudes from 51 to 66\(^{\circ}\) N. Zonal wave number 1 and 2 components were extracted from the meridional wind for the years 2000-2008. The observed wintertime PW activity shows common features associated with the stratospheric wind reversals and the accompanying stratospheric warming events. Onset dates for seven SSW events accompanied by an elevated stratopause (ES) were identified during this time period using the Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM). For the seven events, a significant enhancement in wave number 1 and 2 PW amplitudes near 95 km was found to occur after the wind reversed at 50 km, with amplitudes maximizing approximately 5 days after the onset of the wind reversal. This PW enhancement in the MLT after the event was confirmed using SD-WACCM. When all cases of polar cap wind reversals at 50 km were considered, a significant, albeit moderate, correlation of 0.4 was found between PW amplitudes near 95 km and westward polar-cap stratospheric winds at 50 km, with the maximum correlation occurring \(\sim\) 3 days after the maximum westward wind. These results indicate that the enhancement of PW amplitudes near 95 km is a common feature of SSWs irrespective of the strength of the wind reversal. |
doi_str_mv | 10.48550/arxiv.1611.09068 |
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PW activity near 95 km is derived from meteor wind data using a chain of eight SuperDARN radars at high northern latitudes that span longitudes from 150\(^{\circ}\) W to 25\(^{\circ}\) E and latitudes from 51 to 66\(^{\circ}\) N. Zonal wave number 1 and 2 components were extracted from the meridional wind for the years 2000-2008. The observed wintertime PW activity shows common features associated with the stratospheric wind reversals and the accompanying stratospheric warming events. Onset dates for seven SSW events accompanied by an elevated stratopause (ES) were identified during this time period using the Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM). For the seven events, a significant enhancement in wave number 1 and 2 PW amplitudes near 95 km was found to occur after the wind reversed at 50 km, with amplitudes maximizing approximately 5 days after the onset of the wind reversal. This PW enhancement in the MLT after the event was confirmed using SD-WACCM. When all cases of polar cap wind reversals at 50 km were considered, a significant, albeit moderate, correlation of 0.4 was found between PW amplitudes near 95 km and westward polar-cap stratospheric winds at 50 km, with the maximum correlation occurring \(\sim\) 3 days after the maximum westward wind. These results indicate that the enhancement of PW amplitudes near 95 km is a common feature of SSWs irrespective of the strength of the wind reversal.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1611.09068</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Amplitudes ; Climate models ; Mesosphere ; Physics - Space Physics ; Planetary waves ; Polar caps ; Stratopause ; Stratosphere ; Stratospheric warming ; Temperature ; Thermosphere ; Wavelengths ; Wind</subject><ispartof>arXiv.org, 2016-11</ispartof><rights>2016. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,784,885,27925</link.rule.ids><backlink>$$Uhttps://doi.org/10.5194/acp-15-4997-2015$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.48550/arXiv.1611.09068$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Stray, N H</creatorcontrib><creatorcontrib>Orsolini, Y J</creatorcontrib><creatorcontrib>Espy, P J</creatorcontrib><creatorcontrib>Limpasuvan, V</creatorcontrib><creatorcontrib>Hibbins, R E</creatorcontrib><title>Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events</title><title>arXiv.org</title><description>This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere-lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain of eight SuperDARN radars at high northern latitudes that span longitudes from 150\(^{\circ}\) W to 25\(^{\circ}\) E and latitudes from 51 to 66\(^{\circ}\) N. Zonal wave number 1 and 2 components were extracted from the meridional wind for the years 2000-2008. The observed wintertime PW activity shows common features associated with the stratospheric wind reversals and the accompanying stratospheric warming events. Onset dates for seven SSW events accompanied by an elevated stratopause (ES) were identified during this time period using the Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM). For the seven events, a significant enhancement in wave number 1 and 2 PW amplitudes near 95 km was found to occur after the wind reversed at 50 km, with amplitudes maximizing approximately 5 days after the onset of the wind reversal. This PW enhancement in the MLT after the event was confirmed using SD-WACCM. When all cases of polar cap wind reversals at 50 km were considered, a significant, albeit moderate, correlation of 0.4 was found between PW amplitudes near 95 km and westward polar-cap stratospheric winds at 50 km, with the maximum correlation occurring \(\sim\) 3 days after the maximum westward wind. These results indicate that the enhancement of PW amplitudes near 95 km is a common feature of SSWs irrespective of the strength of the wind reversal.</description><subject>Amplitudes</subject><subject>Climate models</subject><subject>Mesosphere</subject><subject>Physics - Space Physics</subject><subject>Planetary waves</subject><subject>Polar caps</subject><subject>Stratopause</subject><subject>Stratosphere</subject><subject>Stratospheric warming</subject><subject>Temperature</subject><subject>Thermosphere</subject><subject>Wavelengths</subject><subject>Wind</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotkMlqAzEQREUgEOP4A3KKIOdxWrt0DCYbGHzxfZAnPfEYzxJJHid_H3k5NTyqmqoi5IHBXFql4NmH32acM83YHBxoe0MmXAhWWMn5HZnFuAMArg1XSkzIdrWJGEafmr6LtK_psPcdJh_-6NGPGGnT0bRF2mLs47DFgMW-P2I4wdBeEf06hKb7pjEFny6sqbI_tCeKI3Yp3pPb2u8jzq53StZvr-vFR7FcvX8uXpaFV9wWiFI4J1wt69zAilqhVZWHSroaDLAcW2jLpAbHNw6VqcAozeosYFp6FFPyeHl7nqEcQtPmLuVpjvI8R1Y8XRRD6H8OGFO56w-hy5lKDhakMMZY8Q_v12Qi</recordid><startdate>20161128</startdate><enddate>20161128</enddate><creator>Stray, N H</creator><creator>Orsolini, Y J</creator><creator>Espy, P J</creator><creator>Limpasuvan, V</creator><creator>Hibbins, R E</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20161128</creationdate><title>Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events</title><author>Stray, N H ; Orsolini, Y J ; Espy, P J ; Limpasuvan, V ; Hibbins, R E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a528-ee439939f4f16183f5e85ca0c49f0701672368146092b9e57c07561f0c4164ae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Amplitudes</topic><topic>Climate models</topic><topic>Mesosphere</topic><topic>Physics - Space Physics</topic><topic>Planetary waves</topic><topic>Polar caps</topic><topic>Stratopause</topic><topic>Stratosphere</topic><topic>Stratospheric warming</topic><topic>Temperature</topic><topic>Thermosphere</topic><topic>Wavelengths</topic><topic>Wind</topic><toplevel>online_resources</toplevel><creatorcontrib>Stray, N H</creatorcontrib><creatorcontrib>Orsolini, Y J</creatorcontrib><creatorcontrib>Espy, P J</creatorcontrib><creatorcontrib>Limpasuvan, V</creatorcontrib><creatorcontrib>Hibbins, R E</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>ProQuest Central Essentials</collection><collection>AUTh Library subscriptions: ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>ProQuest Publicly Available Content database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Stray, N H</au><au>Orsolini, Y J</au><au>Espy, P J</au><au>Limpasuvan, V</au><au>Hibbins, R E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events</atitle><jtitle>arXiv.org</jtitle><date>2016-11-28</date><risdate>2016</risdate><eissn>2331-8422</eissn><abstract>This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere-lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain of eight SuperDARN radars at high northern latitudes that span longitudes from 150\(^{\circ}\) W to 25\(^{\circ}\) E and latitudes from 51 to 66\(^{\circ}\) N. Zonal wave number 1 and 2 components were extracted from the meridional wind for the years 2000-2008. The observed wintertime PW activity shows common features associated with the stratospheric wind reversals and the accompanying stratospheric warming events. Onset dates for seven SSW events accompanied by an elevated stratopause (ES) were identified during this time period using the Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM). For the seven events, a significant enhancement in wave number 1 and 2 PW amplitudes near 95 km was found to occur after the wind reversed at 50 km, with amplitudes maximizing approximately 5 days after the onset of the wind reversal. This PW enhancement in the MLT after the event was confirmed using SD-WACCM. When all cases of polar cap wind reversals at 50 km were considered, a significant, albeit moderate, correlation of 0.4 was found between PW amplitudes near 95 km and westward polar-cap stratospheric winds at 50 km, with the maximum correlation occurring \(\sim\) 3 days after the maximum westward wind. These results indicate that the enhancement of PW amplitudes near 95 km is a common feature of SSWs irrespective of the strength of the wind reversal.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1611.09068</doi><oa>free_for_read</oa></addata></record> |
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subjects | Amplitudes Climate models Mesosphere Physics - Space Physics Planetary waves Polar caps Stratopause Stratosphere Stratospheric warming Temperature Thermosphere Wavelengths Wind |
title | Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events |
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