貝加爾湖中凍結的甲烷氣泡
Methane Bubbles Frozen in Lake Baikal
來源：Kristina Makeeva｜發表日期：2024-12-29
這些凍結在貝加爾湖中的氣泡是什麼？甲烷。 貝加爾湖是位於俄羅斯的聯合國教科文組織世界遺產，是世界上最大（按體積計算）、最古老、最深的湖泊，擁有世界淡水總量的 20 % 以上。該湖也是甲烷的巨大儲存庫，甲烷是一種溫室氣體，如果釋放出來，可能會增加地球大氣層對紅外線的吸收量，從而提高整個地球的平均溫度。幸運的是，目前冒出的甲烷量在氣候學上並不重要。不過，如果該地區的氣溫顯著升高，或者貝加爾湖的水位下降，會發生什麼情況還不清楚。 圖為冬季上升的甲烷氣泡凍結在覆蓋湖面的異常透明的冰層中。 拼圖挑戰：每日天文拼圖
原文：What are these bubbles frozen into Lake Baikal? Methane. Lake Baikal, a UNESCO World Heritage Site in Russia, is the world's largest (by volume), oldest, and deepest lake, containing over 20% of the world's fresh water. The lake is also a vast storehouse of methane, a greenhouse gas that, if released, could potentially increase the amount of infrared light absorbed by Earth's atmosphere, and so increase the average temperature of the entire planet. Fortunately, the amount of methane currently bubbling out is not climatologically important. It is not clear what would happen, though, were temperatures to significantly increase in the region, or if the water level in Lake Baikal were to drop. Pictured, bubbles of rising methane froze during winter into the exceptionally clear ice covering the lake. Jigsaw Challenge: Astronomy Puzzle of the Day
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
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