波士顿大学领导的研究揭示了火星大气流失的一个关键机制。[1]研究人员发现，太阳风在火星大气外层产生巨大的开尔文-亥姆霍兹波，这些波浪生成等离子体云，将火星大气粒子推向太空。[1]通过美国宇航局MAVEN卫星和中国天问一号卫星的联合观测数据，研究人员首次直接证实了这一大气逃逸机制。[1]
这项研究由波士顿大学空间物理中心的Chi Zhang主要负责，成果已于2026年8月3日发表在《Science Advances》期刊上。[1]研究表明，开尔文-亥姆霍兹波主要集中在火星的一侧，其位置取决于太阳风电场方向。[1]科学家认为，这一过程可能对火星从潜在宜居星球演变为干冷荒漠起过重要作用。[1]美国宇航局的ESCAPADE任务已发射，将继续深入调查火星的太阳风驱动大气逃逸现象。[1]
A research team led by Boston University has identified a previously unconfirmed mechanism driving atmospheric loss on Mars.[1] Solar wind generates massive Kelvin-Helmholtz waves in the upper layers of the Martian atmosphere, which produce plasma clouds that propel atmospheric particles into space.[1] This discovery, detailed in a study published in Science Advances on August 3, 2026, represents the first direct observational confirmation of this atmospheric escape process.[1]
Chi Zhang, a researcher at Boston University's Center for Space Physics, led the investigation using combined observational data from NASA's MAVEN spacecraft and China's Tianwen-1 orbiter.[1] The analysis reveals that these giant waves concentrate on one side of Mars, depending on the direction of the solar wind's electric field.[1] This localized atmospheric stripping mechanism may have played a significant role in Mars' transformation from a potentially habitable world into the cold, dry desert planet observed today.[1]
NASA's recently launched ESCAPADE mission is poised to advance this line of inquiry further, examining the solar wind-driven atmospheric escape processes that continue to reshape the Red Planet's environment.[1]