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Abstract <p>Methane and carbon dioxide fluxes into the atmosphere, associated with groundwater discharges of continuous permafrost in Central Yakutia, were estimated for the first time. The average methane flux from intensively emitting groundwater springs is 211 ± 85 mg C m<sup>–2</sup> h<sup>–1</sup>, and the average carbon dioxide flux is 93&#xa0;± 67 mg C m<sup>–2</sup> h<sup>–1</sup>, which significantly exceeds fluxes of these gases from many subaerial ecosystems. Dissolved methane concentration is also high and varies from 1.6 to 4.8 mg L<sup>–1</sup>. Research results emphasize the importance of groundwater discharge areas as methane sources in continuous permafrost and indicate the need for their further study. This is necessary to more accurately account for their contribution to the overall greenhouse gas balance and to establish the origin of the gases.</p>

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First Estimates of Greenhouse Gas Fluxes Associated with Groundwater Discharges in Permafrost of Central Yakutia

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • N. I. Tananaev,
  • L. A. Krivenok,
  • N. E. Baishev,
  • N. A. Pavlova

摘要

Abstract

Methane and carbon dioxide fluxes into the atmosphere, associated with groundwater discharges of continuous permafrost in Central Yakutia, were estimated for the first time. The average methane flux from intensively emitting groundwater springs is 211 ± 85 mg C m–2 h–1, and the average carbon dioxide flux is 93 ± 67 mg C m–2 h–1, which significantly exceeds fluxes of these gases from many subaerial ecosystems. Dissolved methane concentration is also high and varies from 1.6 to 4.8 mg L–1. Research results emphasize the importance of groundwater discharge areas as methane sources in continuous permafrost and indicate the need for their further study. This is necessary to more accurately account for their contribution to the overall greenhouse gas balance and to establish the origin of the gases.