Version History for Data Release: Yates, K.K., Moore, C.S., and Lemon, M.K., 2020, Time series of carbonate system parameters in Eastern Gulf of Mexico near Tampa Bay, Florida, USA (ver. 2.0, XXXX 2021): U.S. Geological Survey data release, https://doi.org/10.5066/P91T185R. ________________________________________________________ Version 1.0 posted online April 23, 2020 ________________________________________________________ Version 2.0 revised and reposted online February XX, 2021 Changes in version 2.0 1. Created Gulf-of-Mexico-C12-OCSv3-Data-10252018-to-05212020 by appending data collected between January 2020 and May 2020 (field activity 2019-308-FA) to the Gulf-of-Mexico-C12-OCSv3-Data-10252018-to-01292020 (version 1) data set. Consolidated data collected from October 2018 to May 2020 in Gulf-of-Mexico-C12-OCSv3-Data-10252018-to-05212020.