TY - JOUR
T1 - Thermal Tides in the Martian Atmosphere Near Northern Summer Solstice Observed by ACS/TIRVIM Onboard TGO
AU - Fan, Siteng
AU - Guerlet, Sandrine
AU - Forget, François
AU - Bierjon, Antoine
AU - Millour, Ehouarn
AU - Ignatiev, Nikolay
AU - Shakun, Alexey
AU - Grigoriev, Alexey
AU - Trokhimovskiy, Alexander
AU - Montmessin, Franck
AU - Korablev, Oleg
N1 - Publisher Copyright:
© 2022 The Authors.
PY - 2022/4/16
Y1 - 2022/4/16
N2 - Thermal tides in the Martian atmosphere are analyzed using temperature profiles retrieved from nadir observations obtained by the TIRVIM Fourier-spectrometer, part of the Atmospheric Chemistry Suite onboard the ExoMars Trace Gas Orbiter. The data is selected near the northern summer solstice at solar longitude (LS) 75°–105° of Martian Year 35. The observations have a full local time coverage, which enables analyses of daily temperature anomalies. The observed zonal mean temperature is lower by 4–6 K at ∼100 Pa, but higher toward the summer pole, compared to the Laboratoire de Météorologie Dynamique (LMD) Mars General Circulation Model (GCM). Wave mode decomposition shows dominant diurnal tide and important semi-diurnal tide and diurnal Kelvin wave, with maximal amplitudes of 5, 3, and 2.5 K, respectively, from tens to hundreds of Pa. The results generally agree well with the LMD Mars GCM, but with noticeable earlier phases of diurnal (∼1 hr) and semi-diurnal (∼3 hr) tides.
AB - Thermal tides in the Martian atmosphere are analyzed using temperature profiles retrieved from nadir observations obtained by the TIRVIM Fourier-spectrometer, part of the Atmospheric Chemistry Suite onboard the ExoMars Trace Gas Orbiter. The data is selected near the northern summer solstice at solar longitude (LS) 75°–105° of Martian Year 35. The observations have a full local time coverage, which enables analyses of daily temperature anomalies. The observed zonal mean temperature is lower by 4–6 K at ∼100 Pa, but higher toward the summer pole, compared to the Laboratoire de Météorologie Dynamique (LMD) Mars General Circulation Model (GCM). Wave mode decomposition shows dominant diurnal tide and important semi-diurnal tide and diurnal Kelvin wave, with maximal amplitudes of 5, 3, and 2.5 K, respectively, from tens to hundreds of Pa. The results generally agree well with the LMD Mars GCM, but with noticeable earlier phases of diurnal (∼1 hr) and semi-diurnal (∼3 hr) tides.
KW - Mars atmosphere
KW - atmospheric wave
KW - remote sensing
KW - thermal tide
KW - trace gas orbiter
UR - http://www.scopus.com/inward/record.url?scp=85128367400&partnerID=8YFLogxK
U2 - 10.1029/2021GL097130
DO - 10.1029/2021GL097130
M3 - Letter
SN - 0094-8276
VL - 49
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 7
M1 - e2021GL097130
ER -