Scholarlink

<p>Warming temperatures have been invoked as a potential mechanism for widespread change to the erosional regime in Arctic regions, where large portions of watersheds are underlain by permanently frozen soils. Yet recent site-specific studies have delivered conflicting results regarding how erosion along Arctic rivers has responded to past temperature increase, and how erosion will respond to rising temperatures in the future. Here we use 92,009 observations of fluvial erosion across 13,400 stream kilometers in the Mackenzie River watershed to show that erosion rates along rivers across the Canadian Arctic are positively correlated to temperature and uncorrelated with vegetative cover over the satellite record (1985-present). While temperature’s erosive effect appears to be mediated by discharge, our results nevertheless suggest warming will lead to increased erosion in the Arctic but that the enhanced erosive regime may be less dramatic than earlier predictions.</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

Fluvial erosion linked to warming in the Canadian Arctic

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月6日

查看全文
  • Jordan Fields,
  • Jack Kreisler,
  • Evan Dethier,
  • John Perrotti,
  • Carl Renshaw

摘要

Warming temperatures have been invoked as a potential mechanism for widespread change to the erosional regime in Arctic regions, where large portions of watersheds are underlain by permanently frozen soils. Yet recent site-specific studies have delivered conflicting results regarding how erosion along Arctic rivers has responded to past temperature increase, and how erosion will respond to rising temperatures in the future. Here we use 92,009 observations of fluvial erosion across 13,400 stream kilometers in the Mackenzie River watershed to show that erosion rates along rivers across the Canadian Arctic are positively correlated to temperature and uncorrelated with vegetative cover over the satellite record (1985-present). While temperature’s erosive effect appears to be mediated by discharge, our results nevertheless suggest warming will lead to increased erosion in the Arctic but that the enhanced erosive regime may be less dramatic than earlier predictions.