Carbon Dioxide in Soil and Surface Waters in the North of Western Siberia: Methodological Approach and Quantitative Characteristics

IF 1.4 4区农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-03-05 DOI:10.1134/s1064229323602755

O. Yu. Goncharova, M. V. Timofeeva, G. V. Matyshak, A. V. Isaeva

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Abstract

Dissolved inorganic carbon is an essential component of the carbon cycle, especially in the northern regions; however, its loss through water bodies is still rarely included in regional carbon models. The tasks of the work comprise a detailed coverage of the methodological approach of “headspace equilibration” for assessing the concentration of dissolved CO₂ in soil and surface waters and estimation of the CO₂ concentration range in waters of different geneses in the landscapes of northern Western Siberia. The performed methodological work has allowed a headspace equilibration protocol for measuring the CO₂ concentration in waters to be elaborated and described with detailed calculations. The CO₂ concentration in soil (suprapermafrost) and surface waters (river, bog, lake, etc.) ranges from 13 to 2983 µmol/L (274 to 57 000 µatm), and the vast majority of objects are supersaturated with CO₂ relative to the atmosphere. The maximum concentrations are characteristic of suprapermafrost soil and bog waters, and the minimum concentrations are in the waters of aquatic ecosystems (thermokarst and forest lakes). A high variability of CO₂ concentrations in waters necessitates a large number of measurements to provide adequate estimates.

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西西伯利亚北部土壤和地表水中的二氧化碳：方法和定量特征

摘要溶解的无机碳是碳循环的重要组成部分，尤其是在北方地区；然而，区域碳模型中仍然很少包括通过水体流失的无机碳。这项工作的任务包括详细介绍评估土壤和地表水中溶解二氧化碳浓度的 "顶空平衡 "方法，以及估算西西伯利亚北部地貌中不同基因水体的二氧化碳浓度范围。通过所开展的方法论工作，制定并描述了测量水体中二氧化碳浓度的顶空平衡方案，并进行了详细的计算。土壤（超冻土层）和地表水（河流、沼泽、湖泊等）中的二氧化碳浓度范围为 13 至 2983 µmol/L（274 至 57 000 µatm），相对于大气而言，绝大多数物体都处于二氧化碳过饱和状态。超冻土层土壤和沼泽水域的二氧化碳浓度最高，而水生生态系统（温带喀斯特和森林湖泊）水域的二氧化碳浓度最低。水体中二氧化碳浓度的变化很大，因此需要进行大量测量，以提供足够的估计值。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.