Overview
- The Boston University‑led paper published July 31 used simultaneous measurements from NASA’s MAVEN and China’s Tianwen‑1 to link incoming solar wind conditions to local ion escape at Mars.
- Researchers show velocity shear at Mars’ upper atmosphere creates Kelvin‑Helmholtz waves, which roll up into plasma clouds that trap and eject packets of charged atmospheric gas.
- Individual plasma‑cloud bursts can carry about 10 to 100 times more escaping gas than the two previously known steady loss channels, and the clouds are smaller and more localized than earlier estimates.
- Key unknowns remain about how long each cloud lasts, how often bursts occur around the planet, and how much these episodic events add to Mars’s long‑term atmospheric loss, so follow‑up observations and modeling are planned as MAVEN winds down and ESCAPADE begins work.
- The mechanism helps explain Mars’s shift from a thicker, wetter world to its present cold, thin state and matters for other planets without global magnetic fields and for planning future human exploration of Mars.