Geologic constraints on early Mars climate

ES Kite - Space Science Reviews, 2019 - Springer
Early Mars climate research has well-defined goals (MEPAG 2018). Achieving these goals
requires geologists and climate modelers to coordinate. Coordination is easier if results are …

Geological evidence for multiple climate transitions on Early Mars

ES Kite, S Conway - Nature Geoscience, 2024 - nature.com
Landforms and deposits observed on the Martian surface suggest that Mars' early climate
supported rivers and lakes over a time span of more than a billion years. But, like Earth …

In‐situ measurements of ion density in the Martian ionosphere: Underlying structure and variability observed by the MAVEN‐STATIC instrument

CM Fowler, J McFadden, KG Hanley… - Journal of …, 2022 - Wiley Online Library
Measurement of the dense cold thermal plasma in planetary ionospheres via orbiting
spacecraft is challenging because ion energies are small (0–4 eV), densities can vary by …

Do intrinsic magnetic fields protect planetary atmospheres from stellar winds? lessons from ion measurements at Mars, Venus, and Earth

R Ramstad, S Barabash - Space Science Reviews, 2021 - Springer
The accumulation of detailed ion flux measurements from long-lived spacecraft orbiting the
solar system's terrestrial planets have enabled recent studies to estimate the rate of solar …

Martian global current systems and related solar wind energy transfer: hybrid simulation under nominal conditions

XD Wang, S Fatemi, M Holmström… - Monthly Notices of …, 2024 - academic.oup.com
The magnetized solar wind drives a current system around Mars that maintains its induced
magnetosphere. The solar wind also transfers its energy to the atmospheric ions, causing …

Synergies between Venus & exoplanetary observations: Venus and its extrasolar siblings

MJ Way, C Ostberg, BJ Foley, C Gillmann… - Space Science …, 2023 - Springer
Here we examine how our knowledge of present day Venus can inform terrestrial
exoplanetary science and how exoplanetary science can inform our study of Venus. In a …

Mars‐ward ion flows in the martian magnetotail: Mars express observations

C Zhang, Y Futaana, H Nilsson, Z Rong… - Geophysical …, 2022 - Wiley Online Library
We investigate Mars‐ward planetary ions (O+ and O2+) in the Martian magnetotail that
potentially reduce the amount of esca** ions. The global properties of Mars‐ward flows in …

Did Mars Possess a Dense Atmosphere During the First Million Years?

M Scherf, H Lammer - Space Science Reviews, 2021 - Springer
It is not yet entirely clear whether Mars began as a warm and wet planet that evolved
towards the present-day cold and dry body or if it always was cold and dry with just some …

Olivine alteration and the loss of Mars' early atmospheric carbon

J Murray, O Jagoutz - Science Advances, 2024 - science.org
The early Martian atmosphere had 0.25 to 4 bar of CO2 but thinned rapidly around 3.5
billion years ago. The fate of that carbon remains poorly constrained. The hydrothermal …

The Venusian atmospheric oxygen ion escape: Extrapolation to the early solar system

M Persson, Y Futaana, R Ramstad… - Journal of …, 2020 - Wiley Online Library
The present atmosphere of Venus contains almost no water, but recent measurements
indicate that in its early history, Venus had an Earth‐like ocean. Understanding how the …