Global CO2 emissions from dry inland waters share common drivers across ecosystems
Global CO2 emissions from dry inland waters share common drivers across ecosystems
复制标题
DOI：
10.1038/s41467-020-15929-y
复制
发表时间：
2020-05-01
影响因子：
16.6
通讯作者：
Marce, R.
中科院分区：
文献类型：
--
作者：
Keller, P. S.;Catalan, N.;Marce, R.
许多内陆水域表现出完全或部分干涸，或由于全球变化而消失，将沉积物暴露在大气中。然而，这些沉积物的二氧化碳排放数据太少，无法对全球排放量进行估算，也无法了解其基本驱动因素。在这里，我们展示了一项全球调查的结果，该调查涵盖了不同生态系统类型和气候带的196个干燥内陆水域。我们表明，它们的二氧化碳排放共享基本驱动因素，并构成了内陆水域碳循环的很大一部分。不同生态系统类型和气候带的二氧化碳排放量是一致的，地方特征解释了大部分的变化。考虑到这些排放，全球内陆水域碳排放估计值将增加6% （0.12 Pg C y(-1)）。我们的研究结果表明，干燥内陆水域的排放是内陆水域碳循环中一个重要且可能增加的组成部分。
Many inland waters exhibit complete or partial desiccation, or have vanished due to global change, exposing sediments to the atmosphere. Yet, data on carbon dioxide (CO2) emissions from these sediments are too scarce to upscale emissions for global estimates or to understand their fundamental drivers. Here, we present the results of a global survey covering 196 dry inland waters across diverse ecosystem types and climate zones. We show that their CO2 emissions share fundamental drivers and constitute a substantial fraction of the carbon cycled by inland waters. CO2 emissions were consistent across ecosystem types and climate zones, with local characteristics explaining much of the variability. Accounting for such emissions increases global estimates of carbon emissions from inland waters by 6% (0.12 Pg C y(-1)). Our results indicate that emissions from dry inland waters represent a significant and likely increasing component of the inland waters carbon cycle.