近日，日本东京大学Makito Kobayashi团队揭示了亚马逊时期火星中纬度地区长期和多阶段的冰积累。2025年9月2日出版的《地质学》杂志发表了这项成果。

火星中纬度地区的地下冰代表了当今最大的水冰库之一。虽然大气模式预测了亚马逊晚期（过去数亿年）由倾角驱动的冰积累，但其长期变化和影响积累的因素仍不清楚。

利用地貌学证据和数值模拟，研究组揭示了中纬度北部火山口壁和底部的西南沉积趋势。详细的陨石坑填充沉积物分析表明，多个冰川阶段，包括较早的高强度阶段，随后是较晚的低强度阶段，都表现出这种西南趋势（ca. 64098 Ma)。研究组得出结论，持续的多阶段亚马逊冰川由大气水分供应和倾角驱动的气候周期控制。

附：英文原文

Title: Long-term and multi-stage ice accumulation in the martian mid-latitudes during the Amazonian

Author: Trishit Ruj, Hanaya Okuda, Goro Komatsu, Hitoshi Hasegawa, James W. Head, Tomohiro Usui, Shun Mihira, Makito Kobayashi

Issue&Volume: 2025-09-02

Abstract: Subsurface ice in the mid-latitudes of Mars represents one of the largest present-day water ice reservoirs. While atmospheric models predict Late Amazonian (during the past hundreds of millions of years) obliquity-driven ice accumulation, its long-term variations, and the factors influencing accumulation remain unclear. Using geomorphological evidence and numerical modeling, we reveal a southwestern depositional trend within northern mid-latitudinal crater walls and floors. Detailed crater-fill deposit analyses indicate multiple glaciation stages, including an earlier, high-intensity stage followed by a later, lower-intensity stage, both exhibiting this southwestern trend (ca. 64098 Ma). We conclude that persistent multiple-stage Amazonian glaciations were governed by atmospheric water availability and obliquity-driven climate cycles.

DOI: 10.1130/G53418.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G53418.1/660985/Long-term-and-multi-stage-ice-accumulation-in-the