Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the North Atlantic Ocean, Gulf of Mexico from 2021-12-04 to 2021-12-10 (NCEI Accession 0276022)

This dataset includes the discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH on total scale, ammonia, water temperature, salinity, dissolved oxygen and nutrients during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the Southeast U.S. Shelf, Gulf of Mexico from 2021-12-04 to 2021-12-10. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry resulting in a reduction in pH, a process termed ocean acidification. In support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP), the South Florida Project Cruises (SFP) are utilized to collect water samples to measure surface water inorganic carbon and hydrographic parameters including nutrients. Samples are collected from 34 stations on a bi-monthly basis to monitor the outflow of the Shark River Slough (SRS) and red tide in the southwestern Gulf of Mexico. Water samples are sent to and analyzed by scientists at the Atlantic Oceanographic & Meteorological Laboratory (AOML) for dissolved inorganic carbon, pH, total alkalinity and nutrient concentrations. These data are used to observe the effects of the SRS on acidification in the coastal ocean.

本数据集包含2021年12月4日至12月10日期间，“F.G. Walton Smith”号科考船（R/V F.G. Walton Smith）航次WS21338（EXPOCODE 33WA20211204）在美国东南陆架及墨西哥湾采集的离散剖面测量数据，参数涵盖溶解无机碳、总碱度、总标度pH值、氨、水温、盐度、溶解氧及营养盐。人类工业活动产生的大气二氧化碳（CO₂）浓度持续上升，正引发全球海洋碳化学组成改变，导致pH值下降，这一过程被称为海洋酸化（ocean acidification）。为支持美国国家海洋和大气管理局（NOAA）海洋酸化计划（OAP）的海岸监测与研究目标，南佛罗里达项目航次（South Florida Project Cruises, SFP）用于采集水样，以测量表层水无机碳及包括营养盐在内的水文参数。样本每两个月从34个站点采集一次，用于监测鲨鱼河洼地（Shark River Slough, SRS）的流出物及墨西哥湾西南部的赤潮。水样被送至大西洋海洋与气象实验室（Atlantic Oceanographic & Meteorological Laboratory, AOML），由该实验室科学家分析溶解无机碳、pH值、总碱度及营养盐浓度。这些数据用于观测SRS对近岸海洋酸化的影响。