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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Detalles Bibliográficos
Publicado: 2000
Materias:
airglow
atmospheric dynamics
mesopause
optical property
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v52_n4_p261_Scheer
http://hdl.handle.net/20.500.12110/paper_13438832_v52_n4_p261_Scheer
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_13438832_v52_n4_p261_Scheer
record_format dspace
spelling paper:paper_13438832_v52_n4_p261_Scheer2023-06-08T16:10:41Z Unusually low airglow intensities in the Southern Hemisphere midlatitude mesopause region 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. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v52_n4_p261_Scheer 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
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.
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
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v52_n4_p261_Scheer
http://hdl.handle.net/20.500.12110/paper_13438832_v52_n4_p261_Scheer
_version_ 1768542752367181824

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