EGU23-3198
https://doi.org/10.5194/egusphere-egu23-3198
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Diurnal Temperature Variations and Thermal Tides in the Martian Atmosphere Observed by EMIRS during EMM Primary Mission

Siteng Fan1, Francois Forget1, Michael Smith2, Sandrine Guerlet1, Khalid Badri3, Samuel Atwood4,5, Roland Young6, Christopher Edwards7, Philip Christensen8, Justin Deighan5, Hessa Al Matroushi3, Antoine Bierjon1, Jiandong Liu1, and Ehouarn Millour1
Siteng Fan et al.
  • 1LMD/IPSL, Sorbonne Université, PSL Research Université, École Normale Supérieure, École Polytechnique, CNRS, Paris, France (sfan@lmd.ipsl.fr)
  • 2NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 3Mohammed Bin Rashid Space Center, Emirates Institute for Advanced Science and Technology, Al Khawaneej Area, Dubai, UAE
  • 4Space and Planetary Science Center, and Department of Earth Sciences, Khalifa University, Abu Dhabi, UAE
  • 5Laboratory for Atmospheric and Space Physics, Boulder, CO, USA
  • 6Department of Physics & National Space Science and Technology Center, United Arab Emirates University, Al Ain, UAE
  • 7Department of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ, USA
  • 8School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA

We present results of diurnal temperature variations and thermal tides in the Martian atmosphere using observations obtained by the Emirates Mars InfraRed Spectrometer (EMIRS) onboard the Emirates Mars Mission (EMM) Hope probe during its primary mission. The novel orbit design of the spacecraft allows a full geography and local time to be covered every 10 Martian days, approximately ~5° of solar longitude (LS). Diurnal temperature variations are derived for the first time on a planetary scale without any significant gaps in local time or interference from seasonal changes. Contributions of thermal tides are then analyzed. The dataset of the EMM primary mission covers one Martian Year (MY) starting from MY 36 LS=49°. Seasonal changes of the diurnal temperature variations and thermal tides are investigated. The results show good agreements with predictions provided by the Mars Planetary Climate Model (PCM), but with noticeable differences in the phases and wavelengths of the thermal tides. This work provides valuable information on understanding the diurnal climate of Mars, and inspires future advances of Mars GCMs.

How to cite: Fan, S., Forget, F., Smith, M., Guerlet, S., Badri, K., Atwood, S., Young, R., Edwards, C., Christensen, P., Deighan, J., Al Matroushi, H., Bierjon, A., Liu, J., and Millour, E.: Diurnal Temperature Variations and Thermal Tides in the Martian Atmosphere Observed by EMIRS during EMM Primary Mission, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-3198, https://doi.org/10.5194/egusphere-egu23-3198, 2023.