Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-019-0324-8 |
Distinct air-water gas exchange regimes in low- and high-energy streams | |
Ulseth, Amber J.1,5; Hall, Robert O., Jr.2; Canadell, Marta Boix1; Madinger, Hilary L.3,4,6; Niayifar, Amin1; Battin, Tom J.1 | |
2019-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:4页码:259-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | Gas exchange across the air-water interface drives the flux of climate-relevant gases and is critical for biogeochemical processes in aquatic ecosystems. Despite the presence of mountain streams worldwide, we lack basic understanding of gas exchange through their turbulent surfaces, making global estimates of outgassing from streams and rivers difficult to constrain. Here we combine new estimates of gas transfer velocities from tracer gas additions in mountain streams with published data to cover streams differing in geomorphology and hydraulics. We find two different scaling relationships between the turbulence-induced energy dissipation rate and gas transfer velocity for low- and high-channel slope streams, indicating that gas exchange in streams exists in two states. We suggest that turbulent diffusion drives gas transfer velocity in low-energy streams; whereas turbulence entrains air bubbles in high-energy streams, and the resulting bubble-mediated gas exchange accelerates with energy dissipation rate. Gas transfer velocities in the high-energy streams are among the highest reported. Our findings offer a framework to include mountain streams in future estimates of gas fluxes from streams and rivers at the global scale. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462621700010 |
WOS关键词 | CARBON-DIOXIDE ; TRANSFER VELOCITY ; NONUNIFORM FLOW ; CO2 EVASION ; REAERATION ; METABOLISM ; DYNAMICS ; STEEP ; REGRESSION ; TURBULENCE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182196 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Stream Biofilm & Ecosyst Res Lab, Lausanne, Switzerland; 2.Univ Montana, Flathead Lake Biol Stn, Polson, MT 59860 USA; 3.Univ Wyoming, Program Ecol, Laramie, WY 82071 USA; 4.Univ Wyoming, Dept Zool & Physiol, Laramie, WY 82071 USA; 5.Sam Houston State Univ, Dept Biol Sci, Huntsville, TX 77340 USA; 6.Concordia Univ Wisconsin, Dept Life & Earth Sci, Mequon, WI USA |
推荐引用方式 GB/T 7714 | Ulseth, Amber J.,Hall, Robert O., Jr.,Canadell, Marta Boix,et al. Distinct air-water gas exchange regimes in low- and high-energy streams[J]. NATURE GEOSCIENCE,2019,12(4):259-+. |
APA | Ulseth, Amber J.,Hall, Robert O., Jr.,Canadell, Marta Boix,Madinger, Hilary L.,Niayifar, Amin,&Battin, Tom J..(2019).Distinct air-water gas exchange regimes in low- and high-energy streams.NATURE GEOSCIENCE,12(4),259-+. |
MLA | Ulseth, Amber J.,et al."Distinct air-water gas exchange regimes in low- and high-energy streams".NATURE GEOSCIENCE 12.4(2019):259-+. |
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