由于英国的岩石气候变化的原因,目前的CO2去除速度2
Kirsty J Harrington1, Gideon M Henderson2, Robert G Hilton2
1Department of Earth Sciences, University of Oxford, United Kingdom; Research Centre for Carbon Solutions, Heriot Watt University, United Kingdom.
The Science of the total environment
|November 13, 2024
概括
这项研究量化了英国河流中通过天然岩石气候变化的二氧化碳去除. 增强的气候变化可能会显著增加这种天然的碳汇,影响河流化学.
科学领域:
- 地球和环境科学 地球和环境科学
- 地质化学 地质化学
- 气候科学 气候科学
背景情况:
- 岩石的化学风化自然会去除大气中的二氧化碳,调节气候.
- 与英国一样,在国家一级量化这一过程是具有挑战性的,因为地质和土地利用的复杂性.
- 以前通过气候变化去除二氧化碳 (CDR) 的估计主要是在全球范围内.
研究的目的:
- 量化酸盐和碳酸盐气候对英国河流化学的贡献.
- 为了估计英国各地的自然二氧化碳消耗.
- 评估强化气候对英国碳循环和河流系统的潜在影响.
主要方法:
- 利用了来自英国52个流域的40年河流化学数据.
- 应用了MEANDIR地化学反转模型来区分气候变化源.
- 抽出采集区规模数据来估计国家一级的二氧化碳消耗.
主要成果:
- 酸盐和碳酸盐溶液占英国河流化学的很大一部分 (平均分别为7%和49%).
- 英国联合气候变化的最大估计自然CDR为6.4MtCO2 yr-1.1.
- 与碳酸气候相比,硫酸气候变化减少了17-28%的CDR.
- 目前的自然CDR与低端增强气候变化 (EW) 估计值可比.
结论:
- 自然气候在英国提供了相当大的碳汇,估计为每年4.5MtCO2−1.1.
- 加强对气候变化的实施可以使自然气候变化的流量增加一倍.
- 强化气候对河流化学的潜在影响需要在国家部署之前仔细考虑.
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