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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/hess-2019-83
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-83
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Technical note 04 Apr 2019

Technical note | 04 Apr 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

Greenhouse gas flux studies: An automated online system for gas emission measurements in aquatic environments

Nguyen Thanh Duc1,4, Samuel Silverstein2, Martin Wik3, Patrick Crill3, David Bastviken4, and Ruth K. Varner1 Nguyen Thanh Duc et al.
  • 1Institute for the Study of Earth, Oceans and Space and Departmentof Earth Sciences, University of New Hampshire, Durham, 03824, USA
  • 2Department of Physics, Stockholm University, 106 91, Sweden
  • 3Department of Geological Sciences, Stockholm University, 106 91, Sweden
  • 4Department of Thematic Studies – Environmental Change, Linköping University, 581 83, Sweden

Abstract. Aquatic ecosystems are major sources of greenhouse gases (GHG). Robust measurements of natural GHG emissions are vital for evaluating regional to global carbon budgets and for assessing climate feedbacks on natural emissions to improve climate models. Diffusive and ebullitive (bubble) transport are two major pathways of gas release from surface waters. To capture the high temporal variability of these fluxes in a well-defined footprint, we designed and built an inexpensive device that includes an easily mobile diffusive flux chamber and a bubble counter, all in one. In addition to automatically collecting gas samples for subsequent various analyses in the laboratory, this device also utilizes a low cost carbon dioxide (CO2) sensor (SenseAir, Sweden) and methane (CH4) sensor (Figaro, Japan) to measure GHG fluxes. Each of the devices were equipped with an XBee module to enable a local radio communication (DigiMesh network) for time synchronization, and data readout at a server-controller station on the lakeshore. Software of this server-controller is operated on a low-cost computer (Raspberry Pi) which has a 3G connection for remote control and monitor functions from anywhere in the world. This study shows the potential of a low cost automatic sensor network system to study GHG fluxes on lakes in remote locations.

Nguyen Thanh Duc et al.
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Status: open (until 30 May 2019)
Status: open (until 30 May 2019)
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Model code and software

Code to build an automated online system for gas emission measurements in aquatic environments D. Nguyen, S. Silverstein, M. Wik, P. Crill, D. Bastviken, and R. K. Varner https://doi.org/10.17632/yb4h7p4xp4.2

Nguyen Thanh Duc et al.
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Short summary
Under rapid ongoing climate change, accurate quantification of natural greenhouse gas emissions in aquatic environments such as lakes and ponds are needed to understand regulation and feedbacks. Building on the rapid development in wireless communication, sensors and computation technology, we here present a low-cost, open source, automated and remotely accessed and controlled device for carbon dioxide and methane fluxes from open water environments, along with tests showing their potential.
Under rapid ongoing climate change, accurate quantification of natural greenhouse gas emissions...
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