A5081057855- Planetary Science and Exploration
- Space Exploration and Technology
- Astro and Planetary Science
- Space Science and Extraterrestrial Life
- Spaceflight effects on biology
- Earth Systems and Cosmic Evolution
- Historical Astronomy and Related Studies
- Atmospheric aerosols and clouds
- History and Developments in Astronomy
- Aeolian processes and effects
- Hydrocarbon exploration and reservoir analysis
- Stellar, planetary, and galactic studies
- Greenhouse Technology and Climate Control
- Astronomical Observations and Instrumentation
- Space Satellite Systems and Control
- Spacecraft Design and Technology
- Scientific Research and Discoveries
- Biocrusts and Microbial Ecology
- Atmospheric and Environmental Gas Dynamics
- Particle Dynamics in Fluid Flows
- Light effects on plants
Ames Research Center
2019-2023
National Aeronautics and Space Administration
2023
Bay Area Environmental Research Institute
2022
New Mexico State University
2016-2019
Universities Space Research Association
2018
Abstract Impacts on early Mars can produce H 2 and CH 4 in the thermal plume. In a thick CO atmosphere, collision‐induced absorptions between ‐H ‐CH boost greenhouse effect. We construct simple model of impact history show that for variety impactor types surface pressures >0.5 bars, postimpact temperatures due to alone exceed melting point water much longer periods time than from dissipation heat derived impactor's kinetic energy. This timescale is set by hydrogen escape rather radiation...
The nature of the early Martian climate has been subject debate for decades, with geologic evidence suggesting an environment prolonged precipitation and flowing liquid water on surface, while models have struggled to reproduce such conditions. In this paper, we test impact heating hypothesis warming Mars as presented in Segura et al. (2008) using a new version NASA Ames Research Center 3-D Global Climate Model. We simulate impacts asteroids 30-, 50-, 100- km diameter into atmospheres...
The impact heating hypothesis has been explored as a means of warming early Mars and inducing rainfall through the potential injection water, energy, reducing greenhouse gases to atmosphere. We simulate H2-rich post-impact scenarios with 3D NASA Ames legacy Global Climate Model (eMGCM) for 100-km 250-km diameter impactors assess ability these environments warm surface above freezing induce fluvial erosion. find that including degassed hydrogen does not extend short-term period temperatures...