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There may be a chance of small-scale ephemeral liquid water formation on present day Mars, even though the current climate does not support the existence of larger bodies of water. Through a process called deliquescence, hygroscopic salts…

Earth and Planetary Astrophysics · Physics 2022-01-19 Bernadett D. Pál , Ákos Kereszturi

In 2020, hydrogen chloride (HCl) in the gas phase was discovered in the atmosphere of Mars with the Atmospheric Chemistry Suite (ACS) onboard the Trace Gas Orbiter (TGO) mission (Korablev et al., 2021). Its volume mixing ratio (VMR) shows a…

We present spatial and temporal distributions of dust on Mars from Ls = 331 in MY26 until Ls = 80 in MY33 retrieved from the measurements taken by the Planetary Fourier Spectrometer (PFS) aboard Mars Express. In agreement with previous…

Earth and Planetary Astrophysics · Physics 2018-02-09 Paulina Wolkenberg , Marco Giuranna , Davide Grassi , Alessandro Aronica , Shohei Aoki , Diego Scaccabarozzi , Bortolino Saggin

The Mars thermosphere holds clues to the evolution of the Martian climate, and has practical implications for spacecraft visiting Mars, which often use it for aerobraking upon arrival, or for landers, which must pass through it.…

Earth and Planetary Astrophysics · Physics 2019-01-30 E. M. B. Thiemann , F. G. Eparvier , S. W. Bougher , M. Dominique , L. Andersson , Z. Girazian , M. D. Pilinski , B. Templeman , B. M. Jakosky

Before the seasonal polar ice cap starts to expand towards lower latitudes on Mars, small frost patches may condensate out during the cold night and they may remain on the surface even during the day in shady areas. If ice in these areas…

Earth and Planetary Astrophysics · Physics 2023-12-27 Mira Gergácz , Ákos Kereszturi

Martian planet-encircling dust storms or global dust storms (GDS), resulting from the combined influence of local and regional storms, are uncommon aperiodic phenomena: with an average frequency of approximately one every 3-4 MY, they…

Earth and Planetary Astrophysics · Physics 2020-09-02 Hao Chen-Chen , Santiago Perez-Hoyos , Agustin Sanchez-Lavega

We investigate Gravity Waves (GWs) in the lower atmosphere of Mars based on pressure timeseries acquired by the InSight lander. We compile a climatology showing that most GW activity detected at the InSight landing site takes place after…

Earth and Planetary Astrophysics · Physics 2025-01-22 J. Hernández-Bernal , A. Spiga , A. Chatain , J. Pla-García , D. Banfield

The Mars Atmosphere-Ice Coupler MAIC-2 is a simple, latitudinal model, which consists of a set of parameterisations for the surface temperature, the atmospheric water transport and the surface mass balance (condensation minus evaporation)…

Geophysics · Physics 2010-04-28 Ralf Greve , Bjoern Grieger , Oliver J. Stenzel

Mars' thin, CO$_2$-rich atmosphere poses a unique puzzle involving composition, climate history, and habitability. This work explores the intrincate relationship between Mars' atmospheric variations and dynamic solar activity patterns. We…

Earth and Planetary Astrophysics · Physics 2023-09-12 Johan Nicolás Molina Córdoba , S. Vargas Domínguez , J. I. Zuluaga

Post-Noachian Martian paleochannels indicate the existence of liquid water on the surface of Mars after about 3.5 Gya (Irwin et al., 2015; Palucis et al., 2016). In order to explore the effects of variations in CO$_{2}$ partial pressure and…

Earth and Planetary Astrophysics · Physics 2018-03-01 Megan Mansfield , Edwin S. Kite , Michael A. Mischna

Atmospheric gravity (buoyancy) waves (GWs) are of great importance for the energy and momentum budget of all planetary atmospheres. Propagating upward waves carry energy and momentum from the lower atmosphere to thermospheric altitudes and…

Earth and Planetary Astrophysics · Physics 2021-10-27 Erdal Yiğit , Alexander S. Medvedev , Paul Hartogh

Seismic anisotropy, arising from the crystallographic or lattice-preferred orientation of anisotropic minerals or the shape-preferred orientation of melts or cracks, can establish a critical link between Mars's past evolution and its…

Geophysics · Physics 2024-10-03 Jing Shi , Cunrui Han , Tao Wang , Chao Qi , Han Chen , Zhihan Yu , Jiaqi Geng , Minghan Yang , Xu Wang , Ling Chen , Hejiu Hui

Seasonal frosting and defrosting on the surface of Mars is hypothesized to drive both climate processes and the formation and evolution of geomorphological features such as gullies. Past studies have focused on manually analyzing the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Gary Doran , Serina Diniega , Steven Lu , Mark Wronkiewicz , Kiri L. Wagstaff

Ground-based measurements of frozen precipitation are heavily influenced by interactions of surface winds with gauge-shield geometry. The Multi-Angle Snowflake Camera (MASC), which photographs hydrometeors in free-fall from three different…

Atmospheric and Oceanic Physics · Physics 2020-07-22 Kyle E. Fitch , Chaoxun Hang , Ahmad Talaei , Timothy J. Garrett

We report on the temporal variability of the occurrence of waves at the local proton cyclotron frequency upstream from the Martian bow shock from Mars Global Surveyor observations during the first aerobraking and science phasing orbit…

The dynamic atmosphere imposes challenges to ground-based cosmic microwave background observation, especially for measurements on large angular scales. The hydrometeors in the atmosphere, mostly in the form of clouds, scatter the ambient…

Increased economic activity and research interest in the Arctic raise the need for better wave forecasts in the marginal ice zone (MIZ). Mathematical and numerical models of wave propagation in sea ice would benefit from more in situ data…

Atmospheric and Oceanic Physics · Physics 2020-12-07 Trygve K. Løken , Jean Rabault , Erin E. Thomas , Malte Müller , Kai H. Christensen , Graig Sutherland , Atle Jensen

Solar wind turbulence is a dynamical phenomenon that evolves with heliocentric distance. Orbiting Mars since September 2014, Mars Atmosphere and Volatile EvolutioN (MAVEN) offers a unique opportunity to explore some of its main properties…

Solar and Stellar Astrophysics · Physics 2024-06-27 Norberto Romanelli , Nahuel Andres , Gina DiBraccio , Jaye Verniero , Jacob Gruesbeck , Adam Szabo , Jared Espley , Jasper Halekas

The Martian atmosphere experiences large diurnal variations due to the ~24.6 h planetary rotation and its low heat capacity. Understanding such variations on a planetary scale is limited due to the lack of observations, which are greatly…

Airborne dust plays an active role in determining the thermal structure and chemical composition of the present-day atmosphere of Mars and possibly the planet's climate evolution over time through radiative--convective and cloud…

Earth and Planetary Astrophysics · Physics 2023-09-06 Ananyo Bhattacharya , Cheng Li , Nilton O. Renno , Sushil K. Atreya , David Sweeney