Chunlin Song, Shaoda Liu, Genxu Wang, Liwei Zhang, Judith A. Rosentreter, Gang Zhao, Xiangyang Sun, Yuanzhi Yao, Cuicui Mu, Shouqin Sun, Zhaoyong Hu, Shan Lin, Juying Sun, Yang Li, Ying Wang, Yuhao Li, Peter A. Raymond, Jan Karlsson
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引用次数: 0
Abstract
Climate-sensitive northern cryosphere inland waters emit greenhouse gases (GHGs) into the atmosphere, yet their total emissions remain poorly constrained. We present a data-driven synthesis of GHG emissions from northern cryosphere inland waters considering water body types, cryosphere zones, and seasonality. We find that annual GHG emissions are dominated by carbon dioxide ( teragrams of CO2; ) and methane ( teragrams of CH4), while the nitrous oxide emission ( gigagrams of N2O) is minor. The annual CO2–equivalent (CO2e) GHG emissions from northern cryosphere inland waters total or petagrams of CO2e using the 100- or 20-year global warming potentials, respectively. Rivers emit 64% more CO2e GHGs than lakes, despite having only one-fifth of their surface area. The continuous permafrost zone contributed half of the inland water GHG emissions. Annual CO2e emissions from northern cryosphere inland waters exceed the region’s terrestrial net ecosystem exchange, highlighting the important role of inland waters in the cryospheric land-aquatic continuum under a warming climate.
期刊介绍:
Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.