Methane and carbon dioxide fluxes, temperature and relative humidity at Mellersta Harrsjön lake, Stordalen Mire, Abisko, 2015
Nguyen Thanh Duc, Samuel Silverstein, Martin Wik, Patrick Crill, David Bastviken, Ruth K. Varner
Emitted bubble, methane (CH₄) and carbon dioxide (CO₂) at water surface were measured by an automatic bubble counter (ABC) equipped with a pressure sensor and an automatic floating chamber (AFC) equipped with a CH₄ and a CO₂ sensor.
The study was conducted on the lake surface in summer of 2015.
The data, including date time stamp and sensor signals which were logged in an AFC-ABC system, were collected to demonstrate system functions for automated online gas emission measurements in aquatic environments.
LacustrineArctic carbonGreenhouse gas fluxAutomatic floating chamberAutomatic bubble counterFigaro CH₄ sensorSenseair CO₂ sensorInternet of thingsIoT
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Citation
References
Thanh Duc N, Silverstein S, Wik M, Crill P, Bastviken D, Varner RK (2020) Technical note: Greenhouse gas flux studies: an automated online system for gas emission measurements in aquatic environments. Hydrol Earth Syst Sci 24:3417–3430. https://doi.org/10.5194/hess-24-3417-2020
Data description
The data are included in three preprocessed csv files to support the graphs in the article by Thanh Duc (2020). The sensor signals were logged every minute in a 2.4 GHz digimesh wireless network. ABC data columns (in two files having name structure *P_bubble_trap_table*.csv) are at format:
- Datetime (yyyy-MM-dd HH:mm)
- Battery (D.DD)
- Pressure (D.DDDD)
AFC data columns in 20150911_Figure6_datateble.csv are at format:
- Date (YYmmDD)
- Time (HHMM)
- Timenum (conveted in Matlab from Time)
- Datenum (conveted in Matlab from Date and Time)
- DOY (DDD)
- Battery (DD.DD)
- Check_chamber (1/0) indicates chamber close/open
- Control_sw (1/0) indicates control switch on/off
- Pump_AFC (1/0) indicates pump for AFC on/off
- Pump_ABC (1/0) indicates pump for ABC on/off
- Baseline_ok (1/0) indicates background pressure signal in the bubble trap of the ABC.
- Sample (D) indicates which sample vial that the AFC will collect into.
- Sys_state (DDDDDD) is a raw data of system status.
- Sensorbox_flag (1/0) indicated the close/open state of sensor box for ABC.
- I2C2_CO2 (DDDD): CO2 concentration in the AFC
- I2C2_Temp (DD.DD): Temperature in the AFC
- I2C2-RH (DD.DD): Relative humidity in the AFC
- CH4sens (D.DDDD): CH4 sensor signal in mV.
Comments
See article by Thanh Duc et al. (2020) for explanation of how the measurements were made.
Alternative contact person: Patrick Crill, Department of Geological Sciences, Stockholm University.
Project
This research was supported through a postdoctoral fellowship funded by the University of New Hampshire. The field deployments were supported through two US National Science (NSF) grants to Ruth Varner: MacroSystems Biology (EF# 1241937) and the Northern Ecosystems Research for Undergraduates program (NSF REU site EAR#1063037); and by funding from the Swedish Research Council VR to David Bastviken and Patrick Crill (Grant no. 2012-00048). Work time for data analysis and manuscript preparation was also financed by VR grant no. 2016-04829, European Research Council (ERC) grant no. 725546, and VINNOVA grant no. 2015-03529.
Publisher
Bolin Centre Database
License
First name
Duc
Last name or organisation
Nguyen
Email address
Address
Department of Thematic Studies, Environmental Change; Linköping University
Postal code
SE-581 83
City
Linköping
Country
Sweden
GCMD science keyword
Earth science > Atmosphere > Air quality > Emissions
GCMD location
Continent > Europe > Northern Europe > Scandinavia > Sweden
Dataset language
English
Begin date
2015-06-19
End date
2015-08-24