Abstract：
In the extraordinary weather conditions of the austral summer of 2023, fossil mosses thawed out from under the Bellingshausen Ice Dome, King George Island, Southern Shetland Archipelago of maritime Antarctica. At the end of the austral summer, we directly measured greenhouse gas fluxes (CH4 and CO2) from the surface of fossil mosses. We showed that fossil mosses were strong emitters of CH4 and weak emitters of CO2. The real-time measured CH4 emissions reached 0.173 μmol m-2 s-1, which is comparable to CH4 efflux in water bodies or wet tundra in the Arctic.
摘要：
在2023年南方夏季的特殊天气条件下，化石苔藓从Bellingshausen冰顶下融化出来，乔治王岛,海洋南极洲的南设得兰群岛。在南方的夏天结束时，我们直接测量了化石苔藓表面的温室气体通量（CH4和CO2）。我们表明，化石苔藓是CH4的强排放者和CO2的弱排放者。实时测量的CH4排放量达到0.173μmolm-2s-1，与北极水体或湿苔原中的CH4外排相当。
