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全北极河流碳和出口主要由水文因素主导

Yujiao Zhao¹, Yulan Zhang², Shichang Kang³

¹State Key Laboratory of Cryospheric Science and Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Environmental research

|June 1, 2025

概括

全北极河流将大量的碳和运送到海洋. 由气候变暖驱动的水文变化正在重塑这些关键元素从北极地区出口.

科学领域:

环境科学环境科学
地质化学地质化学
水文学的水文学

背景情况:

河流是全球碳和循环的重要组成部分.
了解泛北极河流中的元素运输至关重要,因为它们在区域和全球生物地球化学过程中发挥着重要作用.

研究的目的:

评估来自泛北极河流的碳和出口的时空动态.
确定影响这些元素出口的关键驱动因素.

主要方法:

利用了来自六条泛北极河流的现场观测的综合数据库.
分析了季节性模式,稳定的同位素特征,并使用随机森林模型来确定驱动因素.

主要成果:

全北极河流出口约35.30万亿加-1年和1.04万亿-1年,主要以溶解形式.
季节性出口模式受到水文和生物地球化学过程的影响,有机和无机碳和的峰值明显.
水文因素,特别是排放,被确定为碳和出口的主要驱动因素.

结论:

气候变暖引起的水文变化对泛北极河流中的元素运输产生了重大影响.
这些发现为在气候变化下北极河流碳和循环的未来提供了关键的见解.

关键词:

碳碳碳碳碳碳水文因素水文因素气气是一种气.全北极地区的河流随机森林模型是一个随机森林模型.

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