Current estimates of carbon dioxide (CO₂) evasion from Arctic lakes are highly uncertain because few studies integrate seasonal variability, specifically evasion during spring ice-melt. We quantified annual CO₂ evasion for 14 clear-water Arctic lakes in Northern Sweden through mass balance (ice-melt period) and high-frequency loggers (open-water period). On average, 80% (SD: ± 18) of annual CO₂ evasion occurred within 10 d following ice-melt. The contribution of the ice-melt period to annual CO₂ evasion was high compared to earlier studies of Arctic lakes (47% ± 32%). Across all lakes, the proportion of ice-melt : annual CO₂ evasion was negatively related to the dissolved organic carbon concentration and positively related to the mean depth of the lakes. The results emphasize the need for measurements of CO₂ exchange at ice-melt to accurately quantify CO₂ evasion from Arctic lakes.

中文翻译：

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冰融化期主导着北极清澈湖泊每年的二氧化碳排放量

目前对北极湖泊二氧化碳（CO ₂）逃逸的估计高度不确定，因为很少有研究考虑季节变化，特别是春季冰雪融化期间的逃逸。我们通过质量平衡（冰融化期）和高频记录仪（开放水域期）量化了瑞典北部 14 个清澈的北极湖泊的年度 CO _{2逃逸量。}平均而言，每年 80% (SD: ± 18) 的 CO ₂逃逸发生在冰融化后 10 天内。与早期对北极湖泊的研究相比，冰融化期对每年CO ₂逃逸的贡献很高（47% ± 32%）。在所有湖泊中，冰融化的比例：年CO ₂逃逸量与溶解有机碳浓度呈负相关，与湖泊的平均深度呈正相关。结果强调需要测量冰融化时的CO ₂交换，以准确量化北极湖泊的CO _{2逃逸量。}