暴雨在藻类生长季节带来二氧化碳排放,这发生在一个大型的环氧化湖中
Qirui Wang1, Feng Zhao1, Jiaqi Wang1
1School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China.
Environmental research
|December 8, 2024
概括
暴雨大大增加了温湖的二氧化碳 (CO2) 排放量,使它们成为二氧化碳的来源. 这些事件虽然很少发生,但它们是湖泊二氧化碳流量的关键驱动因素,特别是在生长季节.
科学领域:
- 环境科学 环境科学
- 气候变化研究 气候变化研究
- 临界技术 临界技术
背景情况:
- 湖泊是大气中二氧化碳 (CO2) 的重要来源,影响全球气候变化.
- 湖泊二氧化碳排放的时间变化受藻类生长和降水等因素的影响.
- 尤特罗菲湖可以悖论地充当二氧化碳的吸收和来源,特别是在生长季节.
研究的目的:
- 为了测试降水,特别是暴雨的假设,驱动自化的湖泊的矛盾的二氧化碳排放.
- 研究暴雨事件对湖泊二氧化碳排放 (FCO2) 的影响.
- 了解暴雨增加湖泊二氧化碳流量的机制.
主要方法:
- 部署七个浮标在缩的太湖和一个流入的河流中,以监测水质.
- 在2021年期间,每4小时收集水质和气象数据.
- 使用综合方法计算二氧化碳流量 (FCO2),包括气体扩散模型,CO2calc程序和机器学习算法.
主要成果:
- 只有暴雨 (每日降雨量>50毫米) 显著增加了二氧化碳流 (FCO2).
- 三次暴雨事件占每年二氧化碳排放量的12.15%.
- 在生长季节,暴雨将湖泊从潜在的二氧化碳汇转变为净二氧化碳来源.
结论:
- 暴雨在确定优质湖的二氧化碳净排放方面发挥着至关重要的作用.
- 受暴雨影响的非生物 (如气体转移速度) 和生物 (如水生代谢) 因素都会导致二氧化碳排放的增加.
- 气候变化引起的暴雨频率增加可能会放大极端降水对湖泊二氧化碳排放的影响.
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