Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations

We present the derivation of gravity wave vertical wavelengths from OH airglow observations of different vibrational transitions. It utilizes small phase shifts regularly observed between the OH(3-1) and OH(4-2) intensities in the spectra of the GRIPS (GRound-based Infrared P-branch Spectrometer) in...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Airglow
Atmospheric gravity waves
MLT region
NDMC
Vertical wavelengths
Optical radar
Spectrometers
Emission measurement
Phase relationships
Quantitative estimates
Vibrational transitions
Gravity waves
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13646826_v173_n_p119_Schmidt
http://hdl.handle.net/20.500.12110/paper_13646826_v173_n_p119_Schmidt
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_13646826_v173_n_p119_Schmidt
record_format dspace
spelling paper:paper_13646826_v173_n_p119_Schmidt2023-06-08T16:11:50Z Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations Airglow Atmospheric gravity waves MLT region NDMC Vertical wavelengths Optical radar Spectrometers Airglow Atmospheric gravity waves Emission measurement MLT region NDMC Phase relationships Quantitative estimates Vibrational transitions Gravity waves We present the derivation of gravity wave vertical wavelengths from OH airglow observations of different vibrational transitions. It utilizes small phase shifts regularly observed between the OH(3-1) and OH(4-2) intensities in the spectra of the GRIPS (GRound-based Infrared P-branch Spectrometer) instruments, which record the OH airglow emissions in the wavelength range from 1.5 μm to 1.6 μm simultaneously. These phase shifts are interpreted as being due to gravity waves passing through the OH airglow layer and affecting individual vibrational transitions at slightly different times due to small differences in their emission heights. The results are compared with co-located observations of the Na-Lidar measurements acquired between 2010 and 2014 at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR, 69.28° N, 16.01° E), Norway. This comparison shows best agreement if the mean height difference of the OH(3-1) and OH(4-2) emission is assumed to be 540 m (1σ = 160 m). The results are also compared with co-located observations of the OH(6-2)- and O2b(0-1)-transitions by means of spectrometer observations (TANGOO instrument, Tilting-filter spectrometer for Atmospheric Nocturnal Ground-based Oxygen & hydrOxyl emission measurements) performed from 2013 until 2016 at Oberpfaffenhofen (48.08° N, 11.27° E), Germany. For approximately 40% of all wave events observed with GRIPS in the period range from 0.25 h to 17 h, a quantitative estimate of the phase relationship between the OH(3-1) and OH(4-2) intensities can be retrieved from the spectra allowing derivation of vertical wavelengths. The retrieval performs best for wave periods below two hours (80% success rate) and worse for periods above ten hours (successful in less than 10% of the cases). The average wavelength determined from 102 events amounts to 22.9 km (1σ: 9.0 km). The corresponding mean wavelength determined from the TANGOO observations amounts to 22.6 km ± 10.5 km, if a mean separation of 6.5 km is assumed for the height difference between the OH(6-2) and O2b(0-1)-transitions. © 2018 Elsevier Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13646826_v173_n_p119_Schmidt http://hdl.handle.net/20.500.12110/paper_13646826_v173_n_p119_Schmidt
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 gravity waves
MLT region
NDMC
Vertical wavelengths
Optical radar
Spectrometers
Airglow
Atmospheric gravity waves
Emission measurement
MLT region
NDMC
Phase relationships
Quantitative estimates
Vibrational transitions
Gravity waves
spellingShingle Airglow
Atmospheric gravity waves
MLT region
NDMC
Vertical wavelengths
Optical radar
Spectrometers
Airglow
Atmospheric gravity waves
Emission measurement
MLT region
NDMC
Phase relationships
Quantitative estimates
Vibrational transitions
Gravity waves
Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
topic_facet Airglow
Atmospheric gravity waves
MLT region
NDMC
Vertical wavelengths
Optical radar
Spectrometers
Airglow
Atmospheric gravity waves
Emission measurement
MLT region
NDMC
Phase relationships
Quantitative estimates
Vibrational transitions
Gravity waves
description We present the derivation of gravity wave vertical wavelengths from OH airglow observations of different vibrational transitions. It utilizes small phase shifts regularly observed between the OH(3-1) and OH(4-2) intensities in the spectra of the GRIPS (GRound-based Infrared P-branch Spectrometer) instruments, which record the OH airglow emissions in the wavelength range from 1.5 μm to 1.6 μm simultaneously. These phase shifts are interpreted as being due to gravity waves passing through the OH airglow layer and affecting individual vibrational transitions at slightly different times due to small differences in their emission heights. The results are compared with co-located observations of the Na-Lidar measurements acquired between 2010 and 2014 at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR, 69.28° N, 16.01° E), Norway. This comparison shows best agreement if the mean height difference of the OH(3-1) and OH(4-2) emission is assumed to be 540 m (1σ = 160 m). The results are also compared with co-located observations of the OH(6-2)- and O2b(0-1)-transitions by means of spectrometer observations (TANGOO instrument, Tilting-filter spectrometer for Atmospheric Nocturnal Ground-based Oxygen & hydrOxyl emission measurements) performed from 2013 until 2016 at Oberpfaffenhofen (48.08° N, 11.27° E), Germany. For approximately 40% of all wave events observed with GRIPS in the period range from 0.25 h to 17 h, a quantitative estimate of the phase relationship between the OH(3-1) and OH(4-2) intensities can be retrieved from the spectra allowing derivation of vertical wavelengths. The retrieval performs best for wave periods below two hours (80% success rate) and worse for periods above ten hours (successful in less than 10% of the cases). The average wavelength determined from 102 events amounts to 22.9 km (1σ: 9.0 km). The corresponding mean wavelength determined from the TANGOO observations amounts to 22.6 km ± 10.5 km, if a mean separation of 6.5 km is assumed for the height difference between the OH(6-2) and O2b(0-1)-transitions. © 2018 Elsevier Ltd
title Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
title_short Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
title_full Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
title_fullStr Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
title_full_unstemmed Derivation of vertical wavelengths of gravity waves in the MLT-region from multispectral airglow observations
title_sort derivation of vertical wavelengths of gravity waves in the mlt-region from multispectral airglow observations
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13646826_v173_n_p119_Schmidt
http://hdl.handle.net/20.500.12110/paper_13646826_v173_n_p119_Schmidt
_version_ 1768544333151076352

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