Continuous multi-GAS monitoring of ambient H2O, CO2, SO2, and H2S, Newberry Volcano, Oregon

In response to reports of anomalous degassing at Newberry Volcano during summer 2020 a multi-GAS station (multiple Gas Analyzer System) was deployed to continuously monitor water vapor (H2O), carbon dioxide (CO2), sulfur dioxide (SO2), and hydrogen sulfide (H2S) levels in ambient air at East Lake campground. In addition to gas sensors the station included an anemometer for measurement of wind speed and direction, and sensors to record ambient temperature and relative humidity. The gas sensors' span responses were verified automatically every 7.25 days using CO2/SO2 and H2S gas standards deployed in the field and zeroes were checked automatically every six hours with field-installed soda lime and anhydrite canisters. The station was powered using AC line power from a nearby campsite and ran 24/7. Data were sampled and recorded at 1 Hz and also recorded as hourly average values by the datalogger. Raw timeseries data collected at 1 Hz sample rate were divided into files with a maximum of 10^6 rows for convenience. The station's datalogger recorded span and zero values by taking the median of the last thirty seconds of automated 3-minute-long span and zero cycles. The data reported herein have not been post-processed or adjusted for baseline variations or span drift. This type of instrument has been described in detail by Lewicki et al. (2017) and additional site-specific details are provided in the SiteInfo.csv file. Definitions of monitored features are provided in the "Definitions" file found on the parent directory of this release. A faulty power supply intermittently impacted the station's operation in mid-August and was replaced with a properly functioning unit on August 24, 2020. No further power issues were experienced for the remainder of the deployment. References Lewicki, J.L., Kelly, P.J., Bergfeld, D., Vaughan, R.G., Lowenstern, J.B., 2017. Monitoring gas and heat emissions at Norris Geyser Basin, Yellowstone National Park, USA based on a combined eddy covariance and Multi-GAS approach. J. Volcanol. Geotherm. Res. 347, 312–326. https://doi.org/10.1016/J.JVOLGEORES.2017.10.001