Scholarlink

<p>Anthropogenic climate warming is amplified in the Arctic, impacting the Arctic carbon cycle and its role in regulating climate and global biogeochemical cycles. In this Review, we provide a quantitative and comprehensive overview of the present-day Arctic carbon cycle across the land–ocean continuum. Terrestrial soil stocks total 877 ± 16 Pg C, with upper marine sediments containing 82 ± 35 Pg C. Overall, the integrated Arctic system is a carbon sink, driven by oceanic uptake of CO<sub>2</sub> (127 ± 36 Tg C year<sup>−1</sup>) and organic carbon burial in shelf sea sediments (112 ± 41 Tg C year<sup>–1</sup>). Terrestrial systems, including inland waters and disturbance, are a net source of CH<sub>4</sub> (38 (21, 53) Tg&#xa0;C year<sup>–1</sup>) and CO<sub>2</sub> (12&#xa0;(–606, 661) Tg C year<sup>–1</sup>). The Arctic carbon sink will likely weaken under continued warming, owing to factors such as increased coastal erosion, outgassing of riverine organic carbon and enhanced nearshore carbon turnover lowering shelf sediment burial. Arctic greening and increases in terrestrial carbon sinks will be substantially offset by increases in soil respiration, disturbance from extreme events and enhanced emissions from inland waters. Future research should prioritize enhanced coverage of small catchments and nearshore regions, and inclusion of non-linear responses in biogeochemical models.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The land–ocean Arctic carbon cycle

  • 期刊论文

  • 发表日期：

    2025年2月6日

查看全文
  • Jorien E. Vonk,
  • Michael Fritz,
  • Niek J. Speetjens,
  • Marcel Babin,
  • Annett Bartsch,
  • Luana S. Basso,
  • Lisa Bröder,
  • Mathias Göckede,
  • Örjan Gustafsson,
  • Gustaf Hugelius,
  • Anna M. Irrgang,
  • Bennet Juhls,
  • McKenzie A. Kuhn,
  • Hugues Lantuit,
  • Manfredi Manizza,
  • Jannik Martens,
  • Matt O’Regan,
  • Anya Suslova,
  • Suzanne E. Tank,
  • Jens Terhaar,
  • Scott Zolkos

摘要

Anthropogenic climate warming is amplified in the Arctic, impacting the Arctic carbon cycle and its role in regulating climate and global biogeochemical cycles. In this Review, we provide a quantitative and comprehensive overview of the present-day Arctic carbon cycle across the land–ocean continuum. Terrestrial soil stocks total 877 ± 16 Pg C, with upper marine sediments containing 82 ± 35 Pg C. Overall, the integrated Arctic system is a carbon sink, driven by oceanic uptake of CO2 (127 ± 36 Tg C year−1) and organic carbon burial in shelf sea sediments (112 ± 41 Tg C year–1). Terrestrial systems, including inland waters and disturbance, are a net source of CH4 (38 (21, 53) Tg C year–1) and CO2 (12 (–606, 661) Tg C year–1). The Arctic carbon sink will likely weaken under continued warming, owing to factors such as increased coastal erosion, outgassing of riverine organic carbon and enhanced nearshore carbon turnover lowering shelf sediment burial. Arctic greening and increases in terrestrial carbon sinks will be substantially offset by increases in soil respiration, disturbance from extreme events and enhanced emissions from inland waters. Future research should prioritize enhanced coverage of small catchments and nearshore regions, and inclusion of non-linear responses in biogeochemical models.