Scientists Say Mars Lost Water During a Season They Once Thought Was Mostly Quiet
The Daily Galaxy • • science
Key Points:
- A localized Martian dust storm during Martian Year 37 (2022–2023) lifted water vapor into the middle atmosphere at levels up to ten times higher than usual, revealing that smaller storms can significantly impact Mars' climate and water loss.
- This storm occurred during the Northern Hemisphere summer, challenging previous assumptions that water loss mainly happens in the Southern Hemisphere summer when solar heating is more intense.
- Following the water vapor increase, hydrogen levels at the exobase rose about 2.5 times compared to previous years, indicating enhanced atmospheric escape of hydrogen and thus water loss.
- The study, published in Communications: Earth & Environment, utilized data from multiple missions including ExoMars Trace Gas Orbiter, NASA’s Mars Reconnaissance Orbiter, and the Emirates Mars Mission to link localized dust storms with increased water escape.
- These findings suggest that short, intense, localized dust storms may play a more frequent and significant role in Mars' long-term climate evolution and water loss than previously recognized.
