Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E)
<p>We analysed all-sky camera images observed at Mt. Bohyun observatory (36.2<span class="inline-formula"><sup>∘</sup></span> N, 128.9<span class="inline-formula"><sup>∘</sup></span> E) for the period 2017–2019. The image data...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-05-01
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| Series: | Annales Geophysicae |
| Online Access: | https://angeo.copernicus.org/articles/40/247/2022/angeo-40-247-2022.pdf |
| _version_ | 1811291837983358976 |
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| author | J.-Y. Hwang Y.-S. Lee Y. H. Kim H. Kam S.-M. Song Y.-S. Kwak Y.-S. Kwak T.-Y. Yang |
| author_facet | J.-Y. Hwang Y.-S. Lee Y. H. Kim H. Kam S.-M. Song Y.-S. Kwak Y.-S. Kwak T.-Y. Yang |
| author_sort | J.-Y. Hwang |
| collection | DOAJ |
| description | <p>We analysed all-sky camera images observed at Mt. Bohyun observatory (36.2<span class="inline-formula"><sup>∘</sup></span> N, 128.9<span class="inline-formula"><sup>∘</sup></span> E) for the period 2017–2019. The image
data were acquired with a narrowband filter centred at 557.7 <span class="inline-formula">nm</span> for the OI airglow emission at <span class="inline-formula">∼</span> 96 <span class="inline-formula">km</span> altitude. A total of
150 wave events were identified in the images of 144 clear nights. The interquartile ranges of wavelength, phase speed and periods of the
identified waves are 20.5–35.5 <span class="inline-formula">km</span>, 27.4–45.0 <span class="inline-formula">m s<sup>−1</sup></span> and 10.8–13.7 <span class="inline-formula">min</span> with the median values of 27.8 <span class="inline-formula">km</span>,
36.3 <span class="inline-formula">m s<sup>−1</sup></span> and 11.7 <span class="inline-formula">min</span>, respectively. The summer and spring bias of propagation directions of north-eastward and northward,
respectively, can be interpreted as the effect of filtering by the prevailing winds in the lower atmosphere. In winter the subdominant
north-westward waves may be observed due to a nullified filtering effect by slow northward background wind or secondary waves generated in the upper
atmosphere. Intrinsic phase speeds and periods of the waves were also derived by using the wind data simultaneously observed by a nearly co-located
meteor radar. The nature of vertical propagation was evaluated in each season. The majority of observed waves are found to be freely propagating
and thus can be attributed to wave sources in the lower or upper atmosphere.</p> |
| first_indexed | 2024-04-13T04:36:14Z |
| format | Article |
| id | doaj.art-bde2cde70a4e41aea453ba044d6d8dbb |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-13T04:36:14Z |
| publishDate | 2022-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-bde2cde70a4e41aea453ba044d6d8dbb2022-12-22T03:02:10ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762022-05-014024725710.5194/angeo-40-247-2022Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E)J.-Y. Hwang0Y.-S. Lee1Y. H. Kim2H. Kam3S.-M. Song4Y.-S. Kwak5Y.-S. Kwak6T.-Y. Yang7Department of Astronomy and Space Science, Chungnam National University, Daejeon, South KoreaDepartment of Astronomy and Space Science, Chungnam National University, Daejeon, South KoreaDepartment of Astronomy and Space Science, Chungnam National University, Daejeon, South KoreaKorea Astronomy and Space Science Institute, Daejeon, South KoreaDepartment of Astronomy and Space Science, Chungnam National University, Daejeon, South KoreaKorea Astronomy and Space Science Institute, Daejeon, South KoreaDepartment of Astronomy and Space Science, University of Science and Technology, Daejeon, South KoreaKorea Astronomy and Space Science Institute, Daejeon, South Korea<p>We analysed all-sky camera images observed at Mt. Bohyun observatory (36.2<span class="inline-formula"><sup>∘</sup></span> N, 128.9<span class="inline-formula"><sup>∘</sup></span> E) for the period 2017–2019. The image data were acquired with a narrowband filter centred at 557.7 <span class="inline-formula">nm</span> for the OI airglow emission at <span class="inline-formula">∼</span> 96 <span class="inline-formula">km</span> altitude. A total of 150 wave events were identified in the images of 144 clear nights. The interquartile ranges of wavelength, phase speed and periods of the identified waves are 20.5–35.5 <span class="inline-formula">km</span>, 27.4–45.0 <span class="inline-formula">m s<sup>−1</sup></span> and 10.8–13.7 <span class="inline-formula">min</span> with the median values of 27.8 <span class="inline-formula">km</span>, 36.3 <span class="inline-formula">m s<sup>−1</sup></span> and 11.7 <span class="inline-formula">min</span>, respectively. The summer and spring bias of propagation directions of north-eastward and northward, respectively, can be interpreted as the effect of filtering by the prevailing winds in the lower atmosphere. In winter the subdominant north-westward waves may be observed due to a nullified filtering effect by slow northward background wind or secondary waves generated in the upper atmosphere. Intrinsic phase speeds and periods of the waves were also derived by using the wind data simultaneously observed by a nearly co-located meteor radar. The nature of vertical propagation was evaluated in each season. The majority of observed waves are found to be freely propagating and thus can be attributed to wave sources in the lower or upper atmosphere.</p>https://angeo.copernicus.org/articles/40/247/2022/angeo-40-247-2022.pdf |
| spellingShingle | J.-Y. Hwang Y.-S. Lee Y. H. Kim H. Kam S.-M. Song Y.-S. Kwak Y.-S. Kwak T.-Y. Yang Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) Annales Geophysicae |
| title | Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) |
| title_full | Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) |
| title_fullStr | Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) |
| title_full_unstemmed | Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) |
| title_short | Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E) |
| title_sort | propagating characteristics of mesospheric gravity waves observed by an oi 557 7 thinsp nm airglow all sky camera at mt bohyun 36 2° thinsp n 128 9° thinsp e |
| url | https://angeo.copernicus.org/articles/40/247/2022/angeo-40-247-2022.pdf |
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