http://bolin.su.se/data/stordalen-ghg-sensors-2015-iot-1 Nguyen Thanh Duc, Samuel Silverstein, Martin Wik, Patrick Crill, David Bastviken, Ruth K. Varner Bolin Centre Database 2020 Datafile Lacustrine Arctic carbon Greenhouse gas flux Automatic floating chamber Automatic bubble counter Figaro CH₄ sensor Senseair CO₂ sensor Internet of things IoT Earth science > Atmosphere > Air quality > Emissions Duc Nguyen 2020-07-01T11:59:40+00:00 English 1 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. See article by Thanh Duc et al. (2020) for explanation of how the measurements were made. Alternative contact person: [Patrick Crill](mailto:patrick.crill@geo.su.se), Department of Geological Sciences, Stockholm University.