Navigation and environmental data from R/V Weatherbird II for the West Florida Shelf: USGS Cruise 11CEV01

The United States Geological Survey (USGS) is conducting a study on the effects of climate change on ocean acidification within the Gulf of Mexico; dealing specifically with the effect of ocean acidification on marine organisms and habitats. To investigate this, the USGS participated in cruises in the West Florida Shelf and northern Gulf of Mexico regions aboard the R/V Weatherbird II, a ship of opportunity lead by Dr. Kendra Daly, of the University of South Florida (USF). This cruise occurred January 3-7, 2011, leaving from and returned to Saint Petersburg, Florida. The USGS collected data pertaining to pH, dissolved inorganic carbon (DIC), and total alkalinity in discrete samples. Thirty-six underway discrete samples in January were collected approximately hourly over a span of 745.3 km Flow-through conductivity-temperature-depth (CTD) data were collected, which includes temperature, salinity, and pH. Corroborating the USGS data are the vertical CTD profiles collected by USF, using the following sensors: CTD, oxygen, chlorophyll fluorescence, optical backscatter, and transmissometer. Additionally, discrete depth samples for nutrients, chlorophyll, and particulate organic carbon/nitrogen were collected.

美国地质调查局（United States Geological Survey, USGS）正开展一项关于气候变化对墨西哥湾海洋酸化影响的研究，重点探究海洋酸化对海洋生物及其栖息地的效应。为推进此项研究，美国地质调查局参与了西佛罗里达陆架与墨西哥湾北部海域的科考航次，搭乘由南佛罗里达大学（University of South Florida, USF）肯德拉·达利博士牵头的“天气鸟二号”（R/V Weatherbird II）机遇科考船。本次航次于2011年1月3日至7日实施，往返出发及停靠港均为佛罗里达州圣彼得斯堡。

美国地质调查局采集了离散样本中的pH值、溶解无机碳（dissolved inorganic carbon, DIC）及总碱度相关数据。1月间共采集36个走航离散样本，采样间隔约为1小时，总航行里程达745.3公里。同时采集了流动式温盐深（conductivity-temperature-depth, CTD）连续观测数据，涵盖温度、盐度及pH值参数。

与美国地质调查局数据相互佐证的，是南佛罗里达大学采集的垂直CTD剖面数据，所用观测传感器包括CTD、溶氧仪、叶绿素荧光仪、光学后向散射仪及透射仪。此外，科研团队还采集了不同深度的离散样本，用于检测营养盐、叶绿素及颗粒有机碳/氮含量。