Effect of Southern Hemisphere Sudden Stratospheric Warmings on Antarctica Mesospheric Tides: First Observational Study
We analyzed the structure and variability of observed winds and tides in the Antarctica mesosphere and lower thermosphere (MLT) during the 2002 major sudden stratospheric warming (SSW) and the 2010 minor SSWs. We noted the effect of SSW on the variability of MLT tides for the first time in the South...
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Veröffentlicht in: | Journal of geophysical research. Space physics 2018-03, Vol.123 (3), p.2127-2140 |
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creator | Eswaraiah, S. Kim, Yong Ha Lee, Jaewook Ratnam, M. Vankat Rao, S. V. B. |
description | We analyzed the structure and variability of observed winds and tides in the Antarctica mesosphere and lower thermosphere (MLT) during the 2002 major sudden stratospheric warming (SSW) and the 2010 minor SSWs. We noted the effect of SSW on the variability of MLT tides for the first time in the Southern Hemisphere, although it has been well recognized in the Northern Hemisphere. We utilized the winds measured by Rothera (68°S, 68°W) medium frequency radar and King Sejong Station (62.22°S, 58.78°W) meteor radar for estimating the tidal components (diurnal, semi‐diurnal, and ter‐diurnal) in the MLT region. The unusual behavior of diurnal tide (DT) and semidiurnal tide (SDT) was observed in 2002. Zonal SDT amplitudes were enhanced up to 27 m/s after 18 days from the associated SSW day. However, the meridional tidal amplitudes of both DT and SDT suddenly decreased during the peak SSW, and SDT amplitudes slightly increased to 18 m/s afterward. In the normal years, SDT amplitude stays below 15 m/s. During the 2010 SSW, SDT zonal amplitudes increased up to 40 m/s and 50 m/s at altitudes of 80 km and 90 km, respectively, ~30 days after the associated SSW. Similar but weaker effect is noticed in the meridional components. The ter‐diurnal tide does not show any significant variation during the SSW. The two SSWs offered a challenging issue to answer: why tidal amplitudes are enhanced with a delay after the SSW. The reasons for the delay are discussed in accordance with theoretical predictions.
Key Points
The 2002 major and 2010 minor SSWs over Southern Hemisphere showed a significant effect on the mesospheric tides after a few days of SSW
The ozone variability during SSWs reveals that the mesospheric tides were less predisposed by the ozone presence than other mechanisms
The secondary waves generated by planetary wave‐tidal interaction cause a major effect on the mesospheric tides after the SSW event |
doi_str_mv | 10.1002/2017JA024839 |
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Key Points
The 2002 major and 2010 minor SSWs over Southern Hemisphere showed a significant effect on the mesospheric tides after a few days of SSW
The ozone variability during SSWs reveals that the mesospheric tides were less predisposed by the ozone presence than other mechanisms
The secondary waves generated by planetary wave‐tidal interaction cause a major effect on the mesospheric tides after the SSW event</description><identifier>ISSN: 2169-9380</identifier><identifier>EISSN: 2169-9402</identifier><identifier>DOI: 10.1002/2017JA024839</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Amplitudes ; Delay ; Diurnal variations ; Lower thermosphere ; Mesosphere ; Mesospheric tides ; meteor radar ; MF radar ; MLT tides ; Northern Hemisphere ; Observational studies ; planetary waves ; Radar ; Southern Hemisphere ; Stratosphere ; stratosphere‐MLT coupling ; Stratospheric warming ; sudden stratospheric warming ; Thermosphere ; Tidal amplitude ; Tides ; Wind</subject><ispartof>Journal of geophysical research. Space physics, 2018-03, Vol.123 (3), p.2127-2140</ispartof><rights>2018. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3450-c2c2d093aaaa8db0c0c3043473e2159dce64e78063b7ae2fa0445bcda281e053</citedby><cites>FETCH-LOGICAL-c3450-c2c2d093aaaa8db0c0c3043473e2159dce64e78063b7ae2fa0445bcda281e053</cites><orcidid>0000-0003-0200-9423 ; 0000-0002-5284-4841</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%2F2017JA024839$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2017JA024839$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,1433,27924,27925,45574,45575,46409,46833</link.rule.ids></links><search><creatorcontrib>Eswaraiah, S.</creatorcontrib><creatorcontrib>Kim, Yong Ha</creatorcontrib><creatorcontrib>Lee, Jaewook</creatorcontrib><creatorcontrib>Ratnam, M. Vankat</creatorcontrib><creatorcontrib>Rao, S. V. B.</creatorcontrib><title>Effect of Southern Hemisphere Sudden Stratospheric Warmings on Antarctica Mesospheric Tides: First Observational Study</title><title>Journal of geophysical research. Space physics</title><description>We analyzed the structure and variability of observed winds and tides in the Antarctica mesosphere and lower thermosphere (MLT) during the 2002 major sudden stratospheric warming (SSW) and the 2010 minor SSWs. We noted the effect of SSW on the variability of MLT tides for the first time in the Southern Hemisphere, although it has been well recognized in the Northern Hemisphere. We utilized the winds measured by Rothera (68°S, 68°W) medium frequency radar and King Sejong Station (62.22°S, 58.78°W) meteor radar for estimating the tidal components (diurnal, semi‐diurnal, and ter‐diurnal) in the MLT region. The unusual behavior of diurnal tide (DT) and semidiurnal tide (SDT) was observed in 2002. Zonal SDT amplitudes were enhanced up to 27 m/s after 18 days from the associated SSW day. However, the meridional tidal amplitudes of both DT and SDT suddenly decreased during the peak SSW, and SDT amplitudes slightly increased to 18 m/s afterward. In the normal years, SDT amplitude stays below 15 m/s. During the 2010 SSW, SDT zonal amplitudes increased up to 40 m/s and 50 m/s at altitudes of 80 km and 90 km, respectively, ~30 days after the associated SSW. Similar but weaker effect is noticed in the meridional components. The ter‐diurnal tide does not show any significant variation during the SSW. The two SSWs offered a challenging issue to answer: why tidal amplitudes are enhanced with a delay after the SSW. The reasons for the delay are discussed in accordance with theoretical predictions.
Key Points
The 2002 major and 2010 minor SSWs over Southern Hemisphere showed a significant effect on the mesospheric tides after a few days of SSW
The ozone variability during SSWs reveals that the mesospheric tides were less predisposed by the ozone presence than other mechanisms
The secondary waves generated by planetary wave‐tidal interaction cause a major effect on the mesospheric tides after the SSW event</description><subject>Amplitudes</subject><subject>Delay</subject><subject>Diurnal variations</subject><subject>Lower thermosphere</subject><subject>Mesosphere</subject><subject>Mesospheric tides</subject><subject>meteor radar</subject><subject>MF radar</subject><subject>MLT tides</subject><subject>Northern Hemisphere</subject><subject>Observational studies</subject><subject>planetary waves</subject><subject>Radar</subject><subject>Southern Hemisphere</subject><subject>Stratosphere</subject><subject>stratosphere‐MLT coupling</subject><subject>Stratospheric warming</subject><subject>sudden stratospheric warming</subject><subject>Thermosphere</subject><subject>Tidal amplitude</subject><subject>Tides</subject><subject>Wind</subject><issn>2169-9380</issn><issn>2169-9402</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLw0AUhYMoWGp3_oABt0bvPNIk7kLpw1IRbMFlmMzc6JQ2U2cmlf57o1Vx5dncw-HjcDlRdEnhhgKwWwY0nRfARMbzk6jH6DCPcwHs9MfzDM6jgfdr6JR1EU160X5c16gCsTVZ2ja8omvIDLfG7zqLZNlqjQ1ZBieD_cqMIs_SbU3z4oltSNEE6VQwSpIH9L_Iymj0d2RinA_ksfLo9jIY28hN19Xqw0V0VsuNx8H37UeryXg1msWLx-n9qFjEiosEYsUU05Bz2SnTFShQHAQXKUdGk1wrHApMMxjyKpXIaglCJJXSkmUUIeH96OpYu3P2rUUfyrVtXfeFLxmwhLM8oXlHXR8p5az3Duty58xWukNJofzctvy7bYfzI_5uNnj4ly3n06ciEZQB_wDO2nuZ</recordid><startdate>201803</startdate><enddate>201803</enddate><creator>Eswaraiah, S.</creator><creator>Kim, Yong Ha</creator><creator>Lee, Jaewook</creator><creator>Ratnam, M. Vankat</creator><creator>Rao, S. V. B.</creator><general>Blackwell Publishing Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-0200-9423</orcidid><orcidid>https://orcid.org/0000-0002-5284-4841</orcidid></search><sort><creationdate>201803</creationdate><title>Effect of Southern Hemisphere Sudden Stratospheric Warmings on Antarctica Mesospheric Tides: First Observational Study</title><author>Eswaraiah, S. ; Kim, Yong Ha ; Lee, Jaewook ; Ratnam, M. Vankat ; Rao, S. V. B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3450-c2c2d093aaaa8db0c0c3043473e2159dce64e78063b7ae2fa0445bcda281e053</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Amplitudes</topic><topic>Delay</topic><topic>Diurnal variations</topic><topic>Lower thermosphere</topic><topic>Mesosphere</topic><topic>Mesospheric tides</topic><topic>meteor radar</topic><topic>MF radar</topic><topic>MLT tides</topic><topic>Northern Hemisphere</topic><topic>Observational studies</topic><topic>planetary waves</topic><topic>Radar</topic><topic>Southern Hemisphere</topic><topic>Stratosphere</topic><topic>stratosphere‐MLT coupling</topic><topic>Stratospheric warming</topic><topic>sudden stratospheric warming</topic><topic>Thermosphere</topic><topic>Tidal amplitude</topic><topic>Tides</topic><topic>Wind</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Eswaraiah, S.</creatorcontrib><creatorcontrib>Kim, Yong Ha</creatorcontrib><creatorcontrib>Lee, Jaewook</creatorcontrib><creatorcontrib>Ratnam, M. Vankat</creatorcontrib><creatorcontrib>Rao, S. V. B.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of geophysical research. Space physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Eswaraiah, S.</au><au>Kim, Yong Ha</au><au>Lee, Jaewook</au><au>Ratnam, M. Vankat</au><au>Rao, S. V. B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Southern Hemisphere Sudden Stratospheric Warmings on Antarctica Mesospheric Tides: First Observational Study</atitle><jtitle>Journal of geophysical research. Space physics</jtitle><date>2018-03</date><risdate>2018</risdate><volume>123</volume><issue>3</issue><spage>2127</spage><epage>2140</epage><pages>2127-2140</pages><issn>2169-9380</issn><eissn>2169-9402</eissn><abstract>We analyzed the structure and variability of observed winds and tides in the Antarctica mesosphere and lower thermosphere (MLT) during the 2002 major sudden stratospheric warming (SSW) and the 2010 minor SSWs. We noted the effect of SSW on the variability of MLT tides for the first time in the Southern Hemisphere, although it has been well recognized in the Northern Hemisphere. We utilized the winds measured by Rothera (68°S, 68°W) medium frequency radar and King Sejong Station (62.22°S, 58.78°W) meteor radar for estimating the tidal components (diurnal, semi‐diurnal, and ter‐diurnal) in the MLT region. The unusual behavior of diurnal tide (DT) and semidiurnal tide (SDT) was observed in 2002. Zonal SDT amplitudes were enhanced up to 27 m/s after 18 days from the associated SSW day. However, the meridional tidal amplitudes of both DT and SDT suddenly decreased during the peak SSW, and SDT amplitudes slightly increased to 18 m/s afterward. In the normal years, SDT amplitude stays below 15 m/s. During the 2010 SSW, SDT zonal amplitudes increased up to 40 m/s and 50 m/s at altitudes of 80 km and 90 km, respectively, ~30 days after the associated SSW. Similar but weaker effect is noticed in the meridional components. The ter‐diurnal tide does not show any significant variation during the SSW. The two SSWs offered a challenging issue to answer: why tidal amplitudes are enhanced with a delay after the SSW. The reasons for the delay are discussed in accordance with theoretical predictions.
Key Points
The 2002 major and 2010 minor SSWs over Southern Hemisphere showed a significant effect on the mesospheric tides after a few days of SSW
The ozone variability during SSWs reveals that the mesospheric tides were less predisposed by the ozone presence than other mechanisms
The secondary waves generated by planetary wave‐tidal interaction cause a major effect on the mesospheric tides after the SSW event</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/2017JA024839</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0003-0200-9423</orcidid><orcidid>https://orcid.org/0000-0002-5284-4841</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Amplitudes Delay Diurnal variations Lower thermosphere Mesosphere Mesospheric tides meteor radar MF radar MLT tides Northern Hemisphere Observational studies planetary waves Radar Southern Hemisphere Stratosphere stratosphere‐MLT coupling Stratospheric warming sudden stratospheric warming Thermosphere Tidal amplitude Tides Wind |
title | Effect of Southern Hemisphere Sudden Stratospheric Warmings on Antarctica Mesospheric Tides: First Observational Study |
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