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60年来二氧化碳流动的演变:鉴定由Hulun湖缩引起的源泉和沉降变化

Yulong Tao¹, Sheng Zhang², Xiaohong Shi²

¹Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China; Hulunbuir Academy of Inland Lakes in Northern Cold & Arid Areas, Hulunbuir 021000, China; Inner Mongolia Hulun Lake Wetland Ecosystem National Observation and Research Station, Hulunbuir 021000, China.

The Science of the total environment

|September 6, 2024

概括

胡伦湖从二氧化碳 (CO2) 源转变为水槽,这是由于环保和全球变暖造成的. 碳循环的这种变化影响了它在气候调节中的作用.

科学领域:

环境科学环境科学
临界技术临界技术
气候变化研究气候变化研究

背景情况:

淡水湖对碳循环至关重要,它们充当二氧化碳 (CO2) 的来源或沉积点.
由于人类活动和气候变化,了解北方草原湖泊的源沉动态是复杂的.
胡伦湖,一个主要的中国北部草原湖,为分析这些动态提供了一个案例研究.

研究的目的:

从1963年到2023年,对Hulun湖水空界面的二氧化碳交换流量 (FCO2) 进行定量分析.
调查FCO2的季节性,年间和十年变化.
为了确定Hulun湖二氧化碳来源-沉降关系中观察到的变化背后的驱动因素.

主要方法:

在60年的时间内对二氧化碳交换流量 (FCO2) 的定量分析.
对FCO2季节性,年间和十年变化的统计分析2.
结构方程建模 (SEM) 的应用,以确定物理,化学和生物因素对FCO2的影响.

主要成果:

赫伦湖的FCO2显示显著的季节性,年间和十年变化,在过去的60年里一直在下降.
湖泊从二氧化碳来源 (1963-2019) 过渡到二氧化碳汇 (2020-2023).
优化和全球变暖被确定为主要驱动因素,提高初级生产率并改变二氧化碳平衡.

结论:

湖泊环氧化和全球变暖已经显著改变了Hulun湖的碳循环,将其从二氧化碳来源转变为沉.
由于变暖和环氧化,初级生产率的提高导致了超过呼吸的二氧化碳固定.
这些发现凸显了草原湖泊生态系统对气候变化和人类对碳捕获的影响的脆弱性.

关键词:

碳循环是一个碳循环.二氧化碳交换流量是指二氧化碳的碳源沉转移转移的碳源沉转移.气候变化气候变化气候变化欧洲化是什么意思?

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