Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses
We have obtained horizontal phase velocity distributions of the gravity waves around 90 km from four Antarctic airglow imagers, which belong to an international airglow imager/instrument network known as ANGWIN (Antarctic Gravity Wave Instrument Network). Results from the airglow imagers at Syowa (6...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2017
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/515188/ https://nora.nerc.ac.uk/id/eprint/515188/1/Matsuda_et_al-2017-Journal_of_Geophysical_Research__Atmospheres.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016JD026217/abstract |
id |
ftnerc:oai:nora.nerc.ac.uk:515188 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:515188 2023-05-15T13:49:33+02:00 Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses Matsuda, Takashi S. Nakamura, Takuji Ejiri, Mitsumu K Tsutsumi, Masaki Tomikawa, Yoshihiro Taylor, Michael J. Zhao, Yucheng Pautet, P.-Dominique Murphy, Damian J. Moffat-Griffin, Tracy 2017-09-16 text http://nora.nerc.ac.uk/id/eprint/515188/ https://nora.nerc.ac.uk/id/eprint/515188/1/Matsuda_et_al-2017-Journal_of_Geophysical_Research__Atmospheres.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016JD026217/abstract en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/515188/1/Matsuda_et_al-2017-Journal_of_Geophysical_Research__Atmospheres.pdf Matsuda, Takashi S.; Nakamura, Takuji; Ejiri, Mitsumu K; Tsutsumi, Masaki; Tomikawa, Yoshihiro; Taylor, Michael J.; Zhao, Yucheng; Pautet, P.-Dominique; Murphy, Damian J.; Moffat-Griffin, Tracy orcid:0000-0002-9670-6715 . 2017 Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses. Journal of Geophysical Research: Atmospheres, 122 (17). 8969-8981. https://doi.org/10.1002/2016JD026217 <https://doi.org/10.1002/2016JD026217> cc_by_nc_nd_4 CC-BY-NC-ND Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1002/2016JD026217 2023-02-04T19:43:55Z We have obtained horizontal phase velocity distributions of the gravity waves around 90 km from four Antarctic airglow imagers, which belong to an international airglow imager/instrument network known as ANGWIN (Antarctic Gravity Wave Instrument Network). Results from the airglow imagers at Syowa (69°S, 40°E), Halley (76°S, 27°W), Davis (69°S, 78°E) and McMurdo (78°S, 167°E) were compared, using a new statistical analysis method based on 3-D Fourier transform [Matsuda et al., 2014] for the observation period between 7 April and 21 May 2013. Significant day-to-day and site-to-site differences were found. The averaged phase velocity spectrum during the observation period showed preferential westward direction at Syowa, McMurdo and Halley, but no preferential direction at Davis. Gravity wave energy estimated by I’/I was ~5 times larger at Davis and Syowa than at McMurdo and Halley. We also compared the phase velocity spectrum at Syowa and Davis with the background wind field and found that the directionality only over Syowa could be explained by critical level filtering of the waves. This suggests that the eastward propagating gravity waves over Davis could have been generated above the polar night jet. Comparison of nighttime variations of the phase velocity spectra with background wind measurements suggested that the effect of critical level filtering could not explain the temporal variation of gravity wave directionality well, and other reasons such as variation of wave sources should be taken into account. Directionality was determined to be dependent on the gravity wave periods. Article in Journal/Newspaper Antarc* Antarctic Antarctica polar night Natural Environment Research Council: NERC Open Research Archive Antarctic Journal of Geophysical Research: Atmospheres 122 17 8969 8981 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
We have obtained horizontal phase velocity distributions of the gravity waves around 90 km from four Antarctic airglow imagers, which belong to an international airglow imager/instrument network known as ANGWIN (Antarctic Gravity Wave Instrument Network). Results from the airglow imagers at Syowa (69°S, 40°E), Halley (76°S, 27°W), Davis (69°S, 78°E) and McMurdo (78°S, 167°E) were compared, using a new statistical analysis method based on 3-D Fourier transform [Matsuda et al., 2014] for the observation period between 7 April and 21 May 2013. Significant day-to-day and site-to-site differences were found. The averaged phase velocity spectrum during the observation period showed preferential westward direction at Syowa, McMurdo and Halley, but no preferential direction at Davis. Gravity wave energy estimated by I’/I was ~5 times larger at Davis and Syowa than at McMurdo and Halley. We also compared the phase velocity spectrum at Syowa and Davis with the background wind field and found that the directionality only over Syowa could be explained by critical level filtering of the waves. This suggests that the eastward propagating gravity waves over Davis could have been generated above the polar night jet. Comparison of nighttime variations of the phase velocity spectra with background wind measurements suggested that the effect of critical level filtering could not explain the temporal variation of gravity wave directionality well, and other reasons such as variation of wave sources should be taken into account. Directionality was determined to be dependent on the gravity wave periods. |
format |
Article in Journal/Newspaper |
author |
Matsuda, Takashi S. Nakamura, Takuji Ejiri, Mitsumu K Tsutsumi, Masaki Tomikawa, Yoshihiro Taylor, Michael J. Zhao, Yucheng Pautet, P.-Dominique Murphy, Damian J. Moffat-Griffin, Tracy |
spellingShingle |
Matsuda, Takashi S. Nakamura, Takuji Ejiri, Mitsumu K Tsutsumi, Masaki Tomikawa, Yoshihiro Taylor, Michael J. Zhao, Yucheng Pautet, P.-Dominique Murphy, Damian J. Moffat-Griffin, Tracy Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
author_facet |
Matsuda, Takashi S. Nakamura, Takuji Ejiri, Mitsumu K Tsutsumi, Masaki Tomikawa, Yoshihiro Taylor, Michael J. Zhao, Yucheng Pautet, P.-Dominique Murphy, Damian J. Moffat-Griffin, Tracy |
author_sort |
Matsuda, Takashi S. |
title |
Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
title_short |
Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
title_full |
Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
title_fullStr |
Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
title_full_unstemmed |
Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses |
title_sort |
characteristics of mesospheric gravity waves over antarctica observed by antarctic gravity wave instrument network imagers using 3-d spectral analyses |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/515188/ https://nora.nerc.ac.uk/id/eprint/515188/1/Matsuda_et_al-2017-Journal_of_Geophysical_Research__Atmospheres.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016JD026217/abstract |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica polar night |
genre_facet |
Antarc* Antarctic Antarctica polar night |
op_relation |
https://nora.nerc.ac.uk/id/eprint/515188/1/Matsuda_et_al-2017-Journal_of_Geophysical_Research__Atmospheres.pdf Matsuda, Takashi S.; Nakamura, Takuji; Ejiri, Mitsumu K; Tsutsumi, Masaki; Tomikawa, Yoshihiro; Taylor, Michael J.; Zhao, Yucheng; Pautet, P.-Dominique; Murphy, Damian J.; Moffat-Griffin, Tracy orcid:0000-0002-9670-6715 . 2017 Characteristics of mesospheric gravity waves over Antarctica observed by Antarctic Gravity Wave Instrument Network imagers using 3-D spectral analyses. Journal of Geophysical Research: Atmospheres, 122 (17). 8969-8981. https://doi.org/10.1002/2016JD026217 <https://doi.org/10.1002/2016JD026217> |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2016JD026217 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
122 |
container_issue |
17 |
container_start_page |
8969 |
op_container_end_page |
8981 |
_version_ |
1766251590758432768 |