Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region
During the first part of a new set of airglow observations in the OH (6-2) and the O2 (0-1) Atmospheric bands from El Leoncito, Argentina, that started in August 1997, periods of surprisingly low intensities stand out. For many nights, mean O2 intensities reach only 30%, or less, of what we have see...
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_13438832_v52_n4_p261_Scheer |
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todo:paper_13438832_v52_n4_p261_Scheer2023-10-03T16:09:47Z Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region Scheer, J. Reisin, E.R. airglow atmospheric dynamics mesopause optical property During the first part of a new set of airglow observations in the OH (6-2) and the O2 (0-1) Atmospheric bands from El Leoncito, Argentina, that started in August 1997, periods of surprisingly low intensities stand out. For many nights, mean O2 intensities reach only 30%, or less, of what we have seen in previous campaigns, from 1984 to 1994, at the same site, or a similar latitude. Such an anomaly is also observed, to a lesser degree, in OH intensities. An instrumental artifact in the intensity results can be ruled out by using the signal from the stellar background for a 'field calibration'. A relation to the strong ENSO event with its major climate impact in 1997/8, may, of course, be suspected, although a statistical inference would be weakened by the scarceness of historical precedents of a similar magnitude. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13438832_v52_n4_p261_Scheer |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
airglow atmospheric dynamics mesopause optical property |
| spellingShingle |
airglow atmospheric dynamics mesopause optical property Scheer, J. Reisin, E.R. Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| topic_facet |
airglow atmospheric dynamics mesopause optical property |
| description |
During the first part of a new set of airglow observations in the OH (6-2) and the O2 (0-1) Atmospheric bands from El Leoncito, Argentina, that started in August 1997, periods of surprisingly low intensities stand out. For many nights, mean O2 intensities reach only 30%, or less, of what we have seen in previous campaigns, from 1984 to 1994, at the same site, or a similar latitude. Such an anomaly is also observed, to a lesser degree, in OH intensities. An instrumental artifact in the intensity results can be ruled out by using the signal from the stellar background for a 'field calibration'. A relation to the strong ENSO event with its major climate impact in 1997/8, may, of course, be suspected, although a statistical inference would be weakened by the scarceness of historical precedents of a similar magnitude. |
| format |
JOUR |
| author |
Scheer, J. Reisin, E.R. |
| author_facet |
Scheer, J. Reisin, E.R. |
| author_sort |
Scheer, J. |
| title |
Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| title_short |
Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| title_full |
Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| title_fullStr |
Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| title_full_unstemmed |
Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region |
| title_sort |
unusually low airglow intensities in the southern hemisphere midlatitude mesopause region |
| url |
http://hdl.handle.net/20.500.12110/paper_13438832_v52_n4_p261_Scheer |
| work_keys_str_mv |
AT scheerj unusuallylowairglowintensitiesinthesouthernhemispheremidlatitudemesopauseregion AT reisiner unusuallylowairglowintensitiesinthesouthernhemispheremidlatitudemesopauseregion |
| _version_ |
1807319531225350144 |