Intense Zonal Wind in the Martian Mesosphere During the 2018 Planet-Encircling Dust Event Observed by Ground-Based Infrared Heterodyne Spectroscopy
| dc.contributor.author | Miyamoto, A. | |
| dc.contributor.author | Nakagawa, H. | |
| dc.contributor.author | Kuroda, T. | |
| dc.contributor.author | Takami, K. | |
| dc.contributor.author | Murata, I. | |
| dc.contributor.author | Medvedev, A.S. | |
| dc.contributor.author | Yoshida, N. | |
| dc.contributor.author | Aoki, S. | |
| dc.contributor.author | Sagawa, H. | |
| dc.contributor.author | Kasaba, Y. | |
| dc.contributor.author | Terada, N. | |
| dc.date | 2021 | |
| dc.date.accessioned | 2021-06-23T15:23:19Z | |
| dc.date.available | 2021-06-23T15:23:19Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/7875 | |
| dc.description | We report on the direct measurements of zonal winds around 80 km altitude during the 2018 planet-encircling dust event (PEDE) by infrared (IR) heterodyne spectroscopy. The observed Doppler shifts assume intense retrograde (easterly) winds (208 ± 17 m s−1, 159 ± 20 m s−1, 211 ± 20 m s−1 on June 21, June 27, August 31, 2018, respectively) in the equatorial region during the 2018 PEDE. This is significantly stronger than those during non-storm conditions reported by the previous study (Sonnabend et al., 2012, https://doi.org/10.1016/j.icarus.2011.11.009). The substantial retrograde wind during the PEDE is qualitatively consistent with the predictions by the Mars general circulation models (MGCMs), however, the observed wind on 31, August, are of a larger magnitude. We evaluated the mechanism of acceleration using the output from a high-resolution MGCM. We find out that the stronger winds are related to strengthening the meridional circulation across the equator and forcing by gravity waves. | |
| dc.language | eng | |
| dc.title | Intense Zonal Wind in the Martian Mesosphere During the 2018 Planet-Encircling Dust Event Observed by Ground-Based Infrared Heterodyne Spectroscopy | |
| dc.type | Article | |
| dc.subject.frascati | Physical sciences | |
| dc.audience | Scientific | |
| dc.subject.free | atmosphere | |
| dc.subject.free | dust storm | |
| dc.subject.free | dynamics | |
| dc.subject.free | infrared observation | |
| dc.subject.free | Mars | |
| dc.subject.free | spectroscopy | |
| dc.source.title | Geophysical Research Letters | |
| dc.source.volume | 48 | |
| dc.source.issue | 11 | |
| dc.source.page | e2021GL092413 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.1029/2021GL092413 |
