Quantifying permafrost carbon feedback (PCF) is a critical step in conveying the significance of permafrost carbon emissions to decision-makers and stakeholders and achieving sustainable development goals. Simply assuming a rapid reduction in permafrost area may be an overaggressive approach. This study revisited PCF by incorporating relatively clear permafrost physics into the Dynamic Integrated model of Climate and the Economy. The results show that the total carbon released from permafrost regions in 2100 is 30.5 GtC, which is accompanied by an additional atmospheric warming of 0.038 °C, much lower than previous studies. This study provides a potential perspective to scrutinize the climate feedback and related economic impacts due to permafrost thawing. We may need to pay more attention to carbon processes during nongrowing seasons and sudden changes in permafrost.

中文翻译：

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重新审视永久冻土碳反馈和经济影响

量化永久冻土碳反馈（PCF）是向决策者和利益相关者传达永久冻土碳排放重要性以及实现可持续发展目标的关键一步。简单地假设永久冻土面积会迅速减少可能是一种过于激进的做法。这项研究通过将相对清晰的永久冻土物理学纳入气候与经济的动态综合模型中，重新审视了 PCF。结果表明，2100年永冻土地区释放的碳总量为30.5 GtC，同时伴随着大气额外变暖0.038 °C，远低于之前的研究。这项研究提供了一个潜在的视角来审查永久冻土融化造成的气候反馈和相关经济影响。我们可能需要更多地关注非生长季节的碳过程和永久冻土的突然变化。