In this article, we challenge the notion that global warming stimulates organic matter mineralization and increases greenhouse gas emissions in lakes via direct temperature effects. We show that the interactive effects of warming and transparency loss due to eutrophication or browning overrides atmospheric warming alone. Thermal shielding enables a longer and more stable stratification that results in bottom‐water cooling, prolonged anoxia, and enhanced carbon preservation in a large proportion of global lakes. These effects are strongest in shallow lakes where an additional burial of 4.5 Tg C yr⁻¹ increases current global estimates by 9%. Despite more burial, the net global warming potential of lakes will increase via enhanced methane production, related to prolonged periods of anoxia, rather than warming. Our understanding of how whole‐lake carbon cycling responds to climate change needs revision, as the synergistic influence of warming and transparency loss has much broader ecosystem level functional consequences.

中文翻译：

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热顶，冷底：协同的气候变暖和屏蔽作用增加了湖泊的碳埋藏

在本文中，我们对以下观点提出了挑战：全球变暖会通过直接温度效应刺激有机物矿化并增加湖泊中的温室气体排放量。我们表明，由于富营养化或褐变而导致的变暖和透明性丧失的交互作用优先于大气变暖。热屏蔽可实现更长，更稳定的分层，从而在大部分全球湖泊中实现底水冷却，长时间缺氧和增强碳储量。这些影响在浅埋湖泊中最为强烈，在该浅埋湖泊中额外埋葬了4.5 Tg C yr ^-1将当前的全球估算值提高了9％。尽管埋葬次数增加，但由于与长期缺氧而不是变暖有关的甲烷产量的增加，湖泊的全球净变暖潜力将增加。我们需要对全湖碳循环如何应对气候变化的理解进行修订，因为变暖和透明度下降的协同影响会带来更大范围的生态系统功能后果。