The carbon cycle is a process that helps control the fluctuations of the climate of the Earth. Rising atmospheric carbon dioxide (CO2) emissions due to the burning of fossil fuels have negatively impacted the global carbon cycle. In aquatic ecosystems, rising CO2 is leading to ocean acidification (a decrease in pH). In this work, field sensors for pH and CO2 were used to measure carbonate parameters at three sites in coastal NJ waters. This data can give us a better understanding of inorganic carbon cycling in aquatic coastal ecosystems and the impacts of current and future changes. The three field sites currently have sensors for physical parameters, lower accuracy pH, and pCO2. Data from 2017-2020 have been analyzed through the compilation of a series of pH vs temp, DO% vs pH, and salinity vs temp graphs to examine the variability and determine what is driving changes at these sites. In addition, high accuracy pH sensors are being prepared for deployment at all three sites during the Spring and Summer 2021 field seasons.