Results 71 to 80 of about 61,565 (266)

Role of Synthetic Biofilms in Bed Evolution and the Formation of Sedimentary Structures

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract Microbes are known to shape topographies; however, mechanisms of biofilm‐sediment interactions and the dynamic evolution of biofilm‐covered bedforms remain poorly understood. Here, we explore the effects of synthetic biofilms on the geometry and temporal evolution of underwater bedforms through flume experiments.
Willian R. Assis, Lian Shen, Judy Q. Yang   +2 more
wiley   +1 more source

Reviewing Martian Atmospheric Noble Gas Measurements: From Martian Meteorites to Mars Missions

Geosciences, 2020
Martian meteorites are the only samples from Mars available for extensive studies in laboratories on Earth. Among the various unresolved science questions, the question of the Martian atmospheric composition, distribution, and evolution over geological ...
Thomas Smith, P. M. Ranjith, Huaiyu He, Rixiang Zhu   +3 more
doaj   +1 more source

Interplanetary Magnetic Field Effect on the Location of the Martian Bow Shock: MAVEN Observations

The Astrophysical Journal, 2023
The Martian bow shock (BS) is generated with the mass-loading and magnetic pileup processes when the solar wind interacts with the Martian ionosphere. In this vein, the interplanetary magnetic field (IMF) frozen in the solar wind can affect the location ...
H. Y. Sui, M. Wang, J. Y. Lu, Y. Zhou, J. Wang   +4 more
doaj   +1 more source

Fractionated noble gases in the nakhlite Martian meteorites [PDF]

, 2016
Noble gases measured in Martian meteorites are frequently a mixture of different components, ranging from Martian interior and unfractionated and fractionated atmosphere, to cosmic ray produced isotopes and terrestrial contamination. Here we focus on the
Barnes, G., Bridges, J. C., Hicks, L. J., Ott, U., Schwenzer, S. P., Swindle, T. D., Treiman, A. H.   +6 more
core  

Joint Observation of a Rotational Discontinuity by Tianwen‐1 and MAVEN at Mars

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract The solar wind plays a crucial role in the evolution of planets in the solar system, particularly Mars. Mars has no global intrinsic magnetic field, leading the solar wind to interact directly with the Martian ionosphere and atmosphere. However, there are many strong‐current magnetic structures in the solar wind, which can directly affect the ...
Z. Z. Guo, H. S. Fu, J. B. Cao, Y. M. Wang, M. Ge, T. Y. Zhou, W. D. Fu, W. Z. Zhang, C. Q. Wang   +8 more
wiley   +1 more source

Effect of the Net Charges Carried by Dust on Martian Atmospheric Temperature

Geophysical Research Letters, 2023
Dust particles suspended in the dusty Martian atmosphere are prone to being charged. In this paper, we investigate the effect of the net charges carried by dust particles on the radiative properties of Martian dust.
Xuebang Gao, Li Xie, Jùn Zhou
doaj   +1 more source

Effects of Solar Activity, Solar Insolation and the Lower Atmospheric Dust on the Martian Thermosphere [PDF]

arXiv, 2022
A diagnosis of the Ar densities measured by the Neutral Gas and Ion Mass Spectrometer aboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) and the temperatures derived from these densities shows that solar activity, solar insolation, and the lower atmospheric dust are the dominant forcings of the Martian thermosphere.
arxiv  

Passive Observation of Martian Atmosphere Using O₂(a¹Δ_g) Airglow Radiation: Forward Simulation and Wind Retrieval

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The passive monitoring of Martian wind fields is crucial for deciphering the Martian atmosphere. With the 3 strong spectral lines in the 1.27 μm O2(a1Δg) airglow emission band, this article designs the Martian Static Wind Imaging Michelson ...
Zhengyi Chen, Biyun Zhang, Chunmin Zhang
doaj   +1 more source

Dune formation on the present Mars [PDF]

, 2007
We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of sand-moving winds occuring on today's Mars.
arxiv   +1 more source

Magnetosonic Waves Driven by Maxwellian Ring Protons in the Martian Upper Ionosphere

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract Magnetosonic (MS) waves can be generated by hot Maxwellian ring protons locally within the Martian upper ionosphere, characterized by a weak ambient magnetic field and the presence of cold plasma abundant in heavier ions. A comprehensive study on the resonant instabilities of MS waves making use of the derived growth rates show that ring ...
Amrutha, S. V. Singh, K. C. Barik, G. S. Lakhina   +3 more
wiley   +1 more source