Unravelling the Contribution of Turbulence and Bubbles to Air-Water Gas Exchange in Running Waters
SND-ID: 2021-307-1. Version: 1. DOI: https://doi.org/10.5878/j46g-rw37
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Citation
Alternative title
EXSONIC
Creator/Principal investigator(s)
Marcus Klaus - Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Thierry Labasque - University of Rennes 1, Géosciences Rennes
Gianluca Botter - University of Padova, Padova, Italy, Department of Civil Architectural and Environmental Engineering
Nicola Durighetto - University of Padova, Padova, Italy, Department of Civil Architectural and Environmental Engineering
Jakob Schelker - University of Vienna, Vienna, Austria, Department of Functional and Evolutionary Ecology
Research principal
Principal's reference number
SLU.seksko.2021.IÄ-2.
Description
Aquatic ecosystems exchange gases with the atmosphere and this exchange is critical for many ecosystem processes and the global greenhouse gas cycle. However, it is difficult to determine how fast gases exchange with the atmosphere, especially in running waters where bubbles can speed up the exchange of certain gases. Here, we provide a data set on air-water gas exchange velocities, collected during an outdoor flume experiment. We used experimental stream channels to create a wide range of flow conditions, and tested how these conditions effect the rate at which different gases in the water exchange with the atmosphere. Besides gas exchange velocities for direct air-water exchange and exchange mediated by bubbles, the data set also contains data on, among others, flow conditions, turbulent kinetic energy dissipation rate, bubble flux rate and ambient underwater sound pressure signatures. The experimental design and data are described in articles by Vingiani et al. (2021) and Klaus et al. (2022).
main data contributions:
(1) Gas exchange velocity estimates based on mass balance of various gas
main data contributions:
(1) Gas exchange velocity estimates based on mass balance of various gases in flume water
Concentrations of helium, xenon, argon och methane were measured in the in- and outlet water of the flumes using mass-spectrometry . A mass balance of the gases yielded air-water gas exchange velocities.
(2) turbulent kinetic energy dissipation estimates based on Acoustic Doppler Velocimetry
Three-dimensional flow velocities were measured at 24 locations per flume using an Acoustic Doppler Velocity meter. Spectral analysis was applied to derives turbulent kinetic energy dissipation rates.
(3) sound pressure signatures derived from Hydrophone and microphone recordings
Ambient sound was recorded at 12 locations per flume using a hydrophone and a microphone. Spectral analysis was used to derive sound signatures associated with water flow / turbulence and air bubbles. Show less..
Data contains personal data
No
Language
Time period(s) investigated
2019-07-22 – 2019-08-06
Variables
37
Data format / data structure
Geographic spread
Geographic location: Austria
Geographic description: Lunzer:::Rinnen Experimental Flumes, WasserCluster Lunz, Lunz am See, Austria
Research area
Earth and related environmental sciences (Standard för svensk indelning av forskningsämnen 2011)
Oceanography, hydrology and water resources (Standard för svensk indelning av forskningsämnen 2011)
Geoscientific information (INSPIRE topic categories)
Inland waters (INSPIRE topic categories)
Keywords
Turbulence, Sounds, Discharge/flow, Gas, Model, Watercourse, Bubble
Vingiani, F., Durighetto, N., Klaus, M., Schelker, J., Labasque, T., & Botter, G. (2021). Evaluating stream CO2 outgassing via drifting and anchored flux chambers in a controlled flume experiment. Biogeosciences, 18, 1223–1240.
DOI:
https://doi.org/10.5194/bg-18-1223-2021
Klaus, M., Labasque, T., Botter, G., Durighetto, N., & Schelker, J. (2022). Unraveling the contribution of turbulence and bubbles to air-water gas exchange in running waters. Journal of Geophysical Research: Biogeosciences, 127, e2021JG006520.
DOI:
https://doi.org/10.1029/2021JG006520
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