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在中国的湖泊中,有机碳储存量大幅增加

Dong Liu^1,2, Kun Shi^3,4, Peng Chen⁵

¹Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China.

Nature communications

|September 14, 2024

概括

湖泊中的有机碳 (OC) 储存在空间和时间上有很大变化. 我们的研究表明,由于人类活动和气候,OC储存的增加增加了湖泊碳捕获的增强.

科学领域:

环境科学环境科学
临界技术临界技术
地球系统科学地球系统科学

背景情况:

之前的研究通常假定湖水柱中的静态有机碳 (OC) 水平,忽视动态变化.
全球环境变化需要重新评估水生生态系统中的OC动态.

研究的目的:

量化多个中国湖泊的OC度和储存的时空变化.
确定影响OC存储变化的关键驱动因素.
评估改变OC储存对湖泊碳捕获和排放的影响.

主要方法:

从24366个中国湖泊 (1984-2023) 中利用了广泛的现场数据收集.
采用卫星监测技术来评估OC度和水量.
分析了OC储存,环境因素和碳循环之间的相关性.

主要成果:

在溶解和颗粒物OC度和储存中显示出显著的时空变异性.
在西北盐湖中观察到更高的溶解OC,在东南环保湖中观察到更高的颗粒OC.
发现溶解OC储存增加了44.6%,颗粒OC储存增加了33.5%,这是由于人类活动,水量投入和风力干扰造成的.
记录了全国OC埋葬量上升11.0%,西北湖泊71.1%的碳排放量减少.

结论:

湖泊有机碳储存非常动态,受到多种环境因素的影响.
在湖泊中增加OC储存大大提高了它们在碳捕获中的作用.
湖泊正在成为全球碳循环的关键组成部分,对气候调节有影响.

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