Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm
During intense geomagnetic storms, the rapid and significant production of NO followed by its associated infrared radiative emission in lower thermosphere contributes crucially to the energetics of the upper atmosphere. This makes NO infrared radiative cooling a very important phenomenon which needs...
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| creator | Ranjan, Alok Kumar Nailwal, Dayakrishna Krishna, MV Sunil Kumar, Akash Sarkhel, Sumanta |
| description | During intense geomagnetic storms, the rapid and significant production of NO
followed by its associated infrared radiative emission in lower thermosphere
contributes crucially to the energetics of the upper atmosphere. This makes NO
infrared radiative cooling a very important phenomenon which needs to be
considered for accurate density forecasting in thermosphere. This study reports
the investigation of variations in thermospheric density, and NO radiative
cooling during the recent geomagnetic superstorm of May 2024. A very rare
post-storm thermospheric density depletion of about -23% on May 12 was observed
by Swarm-C in northern hemisphere in comparison to the prestorm condition on
May 9. This overcooling was observed despite the continuous enhancement in
solar EUV (24-36 nm) flux throughout the event. The thermospheric NO infrared
radiative emission in the recovery phase of the storm seems to be the plausible
cause for this observed post-storm density depletion. The TIMED/SABER observed
thermospheric density between 105 and 110 km altitude shows an enhancement
during this thermospheric overcooling. Our analysis also suggests an all time
high thermospheric NO radiative cooling flux up to 11.84 ergs/cm2/sec during
May 2024 geomagnetic superstorm, which has also been compared with famous
Halloween storms of October 2003. |
| doi_str_mv | 10.48550/arxiv.2411.14071 |
| format | Article |
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followed by its associated infrared radiative emission in lower thermosphere
contributes crucially to the energetics of the upper atmosphere. This makes NO
infrared radiative cooling a very important phenomenon which needs to be
considered for accurate density forecasting in thermosphere. This study reports
the investigation of variations in thermospheric density, and NO radiative
cooling during the recent geomagnetic superstorm of May 2024. A very rare
post-storm thermospheric density depletion of about -23% on May 12 was observed
by Swarm-C in northern hemisphere in comparison to the prestorm condition on
May 9. This overcooling was observed despite the continuous enhancement in
solar EUV (24-36 nm) flux throughout the event. The thermospheric NO infrared
radiative emission in the recovery phase of the storm seems to be the plausible
cause for this observed post-storm density depletion. The TIMED/SABER observed
thermospheric density between 105 and 110 km altitude shows an enhancement
during this thermospheric overcooling. Our analysis also suggests an all time
high thermospheric NO radiative cooling flux up to 11.84 ergs/cm2/sec during
May 2024 geomagnetic superstorm, which has also been compared with famous
Halloween storms of October 2003.</description><identifier>DOI: 10.48550/arxiv.2411.14071</identifier><language>eng</language><subject>Physics - Space Physics</subject><creationdate>2024-11</creationdate><rights>http://creativecommons.org/licenses/by/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2411.14071$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2411.14071$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Ranjan, Alok Kumar</creatorcontrib><creatorcontrib>Nailwal, Dayakrishna</creatorcontrib><creatorcontrib>Krishna, MV Sunil</creatorcontrib><creatorcontrib>Kumar, Akash</creatorcontrib><creatorcontrib>Sarkhel, Sumanta</creatorcontrib><title>Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm</title><description>During intense geomagnetic storms, the rapid and significant production of NO
followed by its associated infrared radiative emission in lower thermosphere
contributes crucially to the energetics of the upper atmosphere. This makes NO
infrared radiative cooling a very important phenomenon which needs to be
considered for accurate density forecasting in thermosphere. This study reports
the investigation of variations in thermospheric density, and NO radiative
cooling during the recent geomagnetic superstorm of May 2024. A very rare
post-storm thermospheric density depletion of about -23% on May 12 was observed
by Swarm-C in northern hemisphere in comparison to the prestorm condition on
May 9. This overcooling was observed despite the continuous enhancement in
solar EUV (24-36 nm) flux throughout the event. The thermospheric NO infrared
radiative emission in the recovery phase of the storm seems to be the plausible
cause for this observed post-storm density depletion. The TIMED/SABER observed
thermospheric density between 105 and 110 km altitude shows an enhancement
during this thermospheric overcooling. Our analysis also suggests an all time
high thermospheric NO radiative cooling flux up to 11.84 ergs/cm2/sec during
May 2024 geomagnetic superstorm, which has also been compared with famous
Halloween storms of October 2003.</description><subject>Physics - Space Physics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNqFzrEOgjAQgOEuDkZ9ACfvBcQWS3Q3GBc3JxfS4IFNoNdcC5G3F4i70798wy_EVslEn7NMHgx_bJ-kWqlEaXlSS_HMe_tCVyJQBZ4iumhNA_GN3FLwY2wJ1COXRI11Nbw6njICuJsBUplqqJFaUzuMow2dRw6RuF2LRWWagJtfV2J3zR-X236-KDzb1vBQTDfFfHP8L77o0UCZ</recordid><startdate>20241121</startdate><enddate>20241121</enddate><creator>Ranjan, Alok Kumar</creator><creator>Nailwal, Dayakrishna</creator><creator>Krishna, MV Sunil</creator><creator>Kumar, Akash</creator><creator>Sarkhel, Sumanta</creator><scope>GOX</scope></search><sort><creationdate>20241121</creationdate><title>Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm</title><author>Ranjan, Alok Kumar ; Nailwal, Dayakrishna ; Krishna, MV Sunil ; Kumar, Akash ; Sarkhel, Sumanta</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-arxiv_primary_2411_140713</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Physics - Space Physics</topic><toplevel>online_resources</toplevel><creatorcontrib>Ranjan, Alok Kumar</creatorcontrib><creatorcontrib>Nailwal, Dayakrishna</creatorcontrib><creatorcontrib>Krishna, MV Sunil</creatorcontrib><creatorcontrib>Kumar, Akash</creatorcontrib><creatorcontrib>Sarkhel, Sumanta</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Ranjan, Alok Kumar</au><au>Nailwal, Dayakrishna</au><au>Krishna, MV Sunil</au><au>Kumar, Akash</au><au>Sarkhel, Sumanta</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm</atitle><date>2024-11-21</date><risdate>2024</risdate><abstract>During intense geomagnetic storms, the rapid and significant production of NO
followed by its associated infrared radiative emission in lower thermosphere
contributes crucially to the energetics of the upper atmosphere. This makes NO
infrared radiative cooling a very important phenomenon which needs to be
considered for accurate density forecasting in thermosphere. This study reports
the investigation of variations in thermospheric density, and NO radiative
cooling during the recent geomagnetic superstorm of May 2024. A very rare
post-storm thermospheric density depletion of about -23% on May 12 was observed
by Swarm-C in northern hemisphere in comparison to the prestorm condition on
May 9. This overcooling was observed despite the continuous enhancement in
solar EUV (24-36 nm) flux throughout the event. The thermospheric NO infrared
radiative emission in the recovery phase of the storm seems to be the plausible
cause for this observed post-storm density depletion. The TIMED/SABER observed
thermospheric density between 105 and 110 km altitude shows an enhancement
during this thermospheric overcooling. Our analysis also suggests an all time
high thermospheric NO radiative cooling flux up to 11.84 ergs/cm2/sec during
May 2024 geomagnetic superstorm, which has also been compared with famous
Halloween storms of October 2003.</abstract><doi>10.48550/arxiv.2411.14071</doi><oa>free_for_read</oa></addata></record> |
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| title | Evidence of potential thermospheric overcooling during the May 2024 geomagnetic superstorm |
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