来自海池的温室气体排放量超过了亚南极生态系统中浅湖的排放量
María Victoria Castro1, María Constanza Maluendez Testoni2, Patricia E García1
1Grupo de Ecología de Sistemas Acuáticos a Escala de Paisaje, Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Universidad Nacional del Comahue, CONICET, Quintral 1250, CP8400, Av. De los Pioneros 2350, San Carlos de Bariloche, Río Negro, Argentina.
The Science of the total environment
|January 29, 2026
概括
巴塔哥尼亚的海池和浅湖是温室气体 (GHG) 的重要来源. 与浅湖相比,海池的二氧化碳和甲排放量是浅湖的两倍,影响全球碳循环.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 气候变化研究 气候变化研究
背景情况:
- 内陆水域被认为是二氧化碳 (CO2),甲 (CH4) 和氧化 (N2O) 等温室气体 (GHG) 的来源,特别是在接收大量陆地有机物时.
- 亚南极棕色水浅湖 (SLs) 和海池 (BPs) 对全球碳循环的贡献仍未得到充分研究.
研究的目的:
- 量化和比较南巴塔哥尼亚的亚南极浅湖 (SL) 和海池 (BP) 的扩散性和膨胀性温室气体 (GHG) 排放量.
- 评估这些水体在区域碳循环中的作用及其对气候变化的影响.
主要方法:
- 在两个无冰期内,在四个SL和四个BP的空气-水接口上测量了CH4,CO2和N2O的扩散排放.
- 在第二个采样季节,在两个SL和两个BP中量化了沸式CH4流量.
- 分析了数据,以比较SL和BP之间的温室气体排放率.
主要成果:
- SL和BP都是温室气体净排放来源,BP的二氧化碳和CH4排放量明显高于SL.
- 二氧化碳排放量:BP (55 ± 22 mmol m-2 d-1) 与SL (26 ± 13 mmol m-2 d-1) 相比.
- CH4排放量:BP (3.8 ± 3.0 mmol m-2 d-1) 与SLs (1.1 ± 0.8 mmol m-2 d-1) 相比. 性CH4流量在BP (0.9 ± 1.0 mmol m-2 d-1) 中也比SL (0.3 ± 0.4 mmol m-2 d-1) 高.
- 在这两种水体类型中,N2O排放量都很低.
结论:
- 亚南极海池和浅湖是大气温室气体的已确认来源.
- 与该地区的浅湖相比,海池的二氧化碳和CH4含量不成比例地高.
- 与北半球同行相比,海的引入和随后的BP形成是显著的,但相对较低的温室气体排放来源,对区域碳管理有影响.
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