At Blowing Springs Cave, the CO2-LAMP operated alongside a relatively greater-cost CO 2 monitoring platform. The monitoring platform was also deployed at two sites within the Springfield Plateau province in northwest Arkansas, USA: Blowing Springs Cave and the Savoy Experimental Watershed. CO2-LAMP theoretical operation and measurement were also verified by accompanying laboratory assessment measuring PCO 2 (aq) at multiple water depths. This analysis revealed that an IRGA should be able to measure PCO 2 (aq) independent of corrections for hydrostatic pressure. Using first principles, we derived a formulation of the theoretical operation and measurement of PCO 2 (aq) by infrared gas analyzers submerged in aquatic environments. A relatively inexpensive CO 2 gas analyzer was waterproofed using a semi-permeable, expanded polytetrafluoroethylene membrane. To overcome these barriers, we developed a low-cost Arduino monitoring platform (CO2-LAMP) for recording CO 2 variability in electronically harsh conditions: humid air, soil, and aquatic environments.
#Arduino sensors cost drivers
Resolving this variability and its drivers in terrestrial and aquatic environments ultimately requires high-resolution spatial and temporal monitoring however, relatively high-cost gas analyzers and data loggers can present barriers in terms of cost and functionality. Variability of CO 2 concentrations within the Earth system occurs over a wide range of time and spatial scales.
1Department of Geosciences, University of Arkansas, Fayetteville, AR, United States.
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