Influence of geomagnetic activity on mesopause temperature over Yakutia
The long-term temperature changes of the mesopause region at the hydroxyl molecule OH (6-2) nighttime height and its connection with the geomagnetic activity during the 23rd and beginning of the 24th solar cycles are presented. Measurements were conducted with an infrared digital spectrograph at...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/3363/2018/acp-18-3363-2018.pdf |
| _version_ | 1818999064281219072 |
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| author | G. Gavrilyeva P. Ammosov |
| author_facet | G. Gavrilyeva P. Ammosov |
| author_sort | G. Gavrilyeva |
| collection | DOAJ |
| description | The long-term temperature changes of the mesopause region at the hydroxyl
molecule OH (6-2) nighttime height and its connection with the geomagnetic
activity during the 23rd and beginning of the 24th solar cycles are
presented. Measurements were conducted with an infrared digital spectrograph
at the Maimaga station (63° N, 129.5° E). The hydroxyl
rotational temperature (TOH) is assumed to be equal to the neutral atmosphere
temperature at the altitude of ∼ 87 km. The average temperatures
obtained for the period 1999 to 2015 are considered. The season of
observations starts at the beginning of August and lasts until the middle of
May. The maximum of the seasonally averaged temperatures is delayed by
2 years relative to the maximum of the solar radio emission flux (wavelength of
10.7 cm), and correlates with a change in geomagnetic activity (Ap index).
Temperature grouping in accordance with the geomagnetic activity level showed
that in years with high activity (Ap > 8), the mesopause
temperature from October to February is about 10 K higher than in years with
low activity (Ap < = 8). Cross-correlation analysis showed no
temporal shift between geomagnetic activity and temperature. The correlation
coefficient is equal to 0.51 at the 95 % level. |
| first_indexed | 2024-12-20T22:11:29Z |
| format | Article |
| id | doaj.art-ac047e263188486c9d195abac24360bc |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-20T22:11:29Z |
| publishDate | 2018-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-ac047e263188486c9d195abac24360bc2022-12-21T19:25:10ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-03-01183363336710.5194/acp-18-3363-2018Influence of geomagnetic activity on mesopause temperature over YakutiaG. Gavrilyeva0P. Ammosov1Yu. G. Shafer Institute for Cosmophysical Research and Aeronomy SB RAS, 677098, Yakutsk, Russian FederationYu. G. Shafer Institute for Cosmophysical Research and Aeronomy SB RAS, 677098, Yakutsk, Russian FederationThe long-term temperature changes of the mesopause region at the hydroxyl molecule OH (6-2) nighttime height and its connection with the geomagnetic activity during the 23rd and beginning of the 24th solar cycles are presented. Measurements were conducted with an infrared digital spectrograph at the Maimaga station (63° N, 129.5° E). The hydroxyl rotational temperature (TOH) is assumed to be equal to the neutral atmosphere temperature at the altitude of ∼ 87 km. The average temperatures obtained for the period 1999 to 2015 are considered. The season of observations starts at the beginning of August and lasts until the middle of May. The maximum of the seasonally averaged temperatures is delayed by 2 years relative to the maximum of the solar radio emission flux (wavelength of 10.7 cm), and correlates with a change in geomagnetic activity (Ap index). Temperature grouping in accordance with the geomagnetic activity level showed that in years with high activity (Ap > 8), the mesopause temperature from October to February is about 10 K higher than in years with low activity (Ap < = 8). Cross-correlation analysis showed no temporal shift between geomagnetic activity and temperature. The correlation coefficient is equal to 0.51 at the 95 % level.https://www.atmos-chem-phys.net/18/3363/2018/acp-18-3363-2018.pdf |
| spellingShingle | G. Gavrilyeva P. Ammosov Influence of geomagnetic activity on mesopause temperature over Yakutia Atmospheric Chemistry and Physics |
| title | Influence of geomagnetic activity on mesopause temperature over Yakutia |
| title_full | Influence of geomagnetic activity on mesopause temperature over Yakutia |
| title_fullStr | Influence of geomagnetic activity on mesopause temperature over Yakutia |
| title_full_unstemmed | Influence of geomagnetic activity on mesopause temperature over Yakutia |
| title_short | Influence of geomagnetic activity on mesopause temperature over Yakutia |
| title_sort | influence of geomagnetic activity on mesopause temperature over yakutia |
| url | https://www.atmos-chem-phys.net/18/3363/2018/acp-18-3363-2018.pdf |
| work_keys_str_mv | AT ggavrilyeva influenceofgeomagneticactivityonmesopausetemperatureoveryakutia AT pammosov influenceofgeomagneticactivityonmesopausetemperatureoveryakutia |