Warming in the Arctic is causing soils to decompose more rapidly, even during winter. Now, estimates of winter carbon dioxide loss indicate that it can offset carbon gains during the growing season, meaning that the region is a source of carbon.

中文翻译：

---

随着冬天的消逝，北极地区的碳排放量减少

即使在冬季，北极地区的变暖也使土壤更快地分解。现在，对冬季二氧化碳损失的估计表明，它可以抵消生长季节的碳增加，这意味着该地区是碳源。