Scholarlink

<p>Lakes have great contributions to global CO<sub>2</sub> emissions, yet reconstructions of historical CO<sub>2</sub> sources/sinks in lakes remain limited, largely due to the lack of reliable indicators. This study addresses this gap by examining CO<sub>2</sub> concentrations and aquatic plant δ<sup>13</sup>C from 105 lakes in China. Our results demonstrate aquatic plant δ<sup>13</sup>C faithfully record CO<sub>2</sub> concentration variations, establishing it as a reliable indicator for paleolake CO<sub>2</sub>. Building on this finding, we analyzed δ<sup>13</sup>C of aquatic plant remains in sediment cores from four Tibetan Plateau lakes. Integrating these data with published δ<sup>13</sup>C records from ten additional lakes has enabled a 26,000-year reconstruction of lake CO<sub>2</sub> concentrations. Our integrated record reveals that Tibetan lakes have functioned as persistent CO<sub>2</sub> sources since the Last Glacial Maximum, with enhanced emissions during the last deglaciation and early Holocene. Thus, inland lakes played a substantial role in the global CO<sub>2</sub> cycle during the deglaciation as compared to today.</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

Tibetan lakes have been persistent CO2 sources since the Last Glacial Maximum

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月3日

查看全文
  • Hu Liu,
  • Weiguo Liu,
  • Zhoufeng Wang,
  • Huanye Wang,
  • Peng Cheng,
  • Shangbin Xiao,
  • Zheng Wang,
  • Jiawei Jiang,
  • Wenke Wang,
  • Aifeng Zhou,
  • Junchi Liu,
  • Xiangzhong Li,
  • Zhonghui Liu

摘要

Lakes have great contributions to global CO2 emissions, yet reconstructions of historical CO2 sources/sinks in lakes remain limited, largely due to the lack of reliable indicators. This study addresses this gap by examining CO2 concentrations and aquatic plant δ13C from 105 lakes in China. Our results demonstrate aquatic plant δ13C faithfully record CO2 concentration variations, establishing it as a reliable indicator for paleolake CO2. Building on this finding, we analyzed δ13C of aquatic plant remains in sediment cores from four Tibetan Plateau lakes. Integrating these data with published δ13C records from ten additional lakes has enabled a 26,000-year reconstruction of lake CO2 concentrations. Our integrated record reveals that Tibetan lakes have functioned as persistent CO2 sources since the Last Glacial Maximum, with enhanced emissions during the last deglaciation and early Holocene. Thus, inland lakes played a substantial role in the global CO2 cycle during the deglaciation as compared to today.