Lisa L. Robbins Kira E. Barrera Kendra L. Daly Paul O. Knorr 2013 vector digital data Data Series 712 St. Petersburg, FL U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center http://pubs.usgs.gov/ds/0712/data/2011_June/11BHM02_AFT_CO2.zip 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 June 25 - 30, 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 over a span of 1632 kilometer (km) track line, additionally 36 discrete samples were taken at ten stations, these were taken at various depths. 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. The purpose is to study the effects of climate change on ocean acidification within the Gulf of Mexico. The USGS Saint Petersburg Coastal and Marine Science Center (SPCMSC) - St. Petersburg, FL, assigns a unique identifier to each cruise or field activity. For example, 11BHM02 tells us the data were collected in 2011 for Benthic Habitat Mapping and the data were collected during the second field activity for that project in that calendar year. Refer to http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html for a detailed description of the method used to assign the cruise ID. 2011 data collection Complete None planned -85.8753 -83.03413 29.20133 27.06688 USGS Metadata Identifier USGS:818968d0-0bbb-4051-b89d-d5353ea9fa62 Ocean Chemistry pH total carbon Salinity carbon flux Ocean Acidification pCO2 Temperature Data Categories for Marine Planning assessments physical/chemical features Marine Realms Information Bank (MRIB) Keywords chemical analysis chemical oceanography environmental chemistry ocean acidification USGS Thesaurus chemical analysis marine chemistry ocean acidification Region West Florida Shelf Florida United States None Mesopelagic Epipelagic ocean surface Bathypelagic None 2011 June None USGS and USF requests to be acknowledged as originator of the data in future products or derivative research. United States Geological Survey St. Petersburg Coastal and Marine Science Center Lisa Robbins Research Oceanographer Unknown

600 4th Street South

St. Petersburg Florida 33701 US 727-502-8005 727-502-8181 8am to 5pm M-F EST Microsoft Windows Server 2008 R2 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.2.3200 ; Microsoft Excel The QA/QC process looked for internal consistencies in the data by calculating the results using CO2SYS and back checking with the collected data. These data are collected along tracklines (2-D) and therefore inherently incomplete geologic details between lines must be inferred. Flow-through data was collected using a Sunburst AFT pH, which measures pH on the total hydrogen ion scale, was attached to the flow-through system. This system sampled the seawater approximately every three minutes and has a precision and accuracy of 0.001 and ±0.003, respectively. The Sunburst AFT-CO2 system was used to measure the partial pressure of CO2 in water (pCO2) and was attached to the shipboard flow-through system. The instrument sampled approximately every five minutes and had a precision and accuracy of about 1 ppm and ± 3 ppm, respectively. 20110625 Data entered into a spreadsheet and merged with other data sources: GPS from the ship, as well as the lab results of total alkalinity and disolved inorganic carbon from the USGS St. Petersburg Carbon Analytical Laboratory. 20120816 2011_June_AFT_CO2.csv 2011_June_AFT_CO2.xls The spreadsheet was imported into ArcGIS 10 and converted into a shapefile. 2011_June_AFT_CO2.xls 20120816 Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20170313 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20201013 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Vector Entity point 39 8.9831528411952133e-009 8.9831528411952133e-009 Decimal degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 2011_June_Aft_CO2 Autonomous Flow Through (AFT) system continuous measurements of chemical and physical parameters of seawater USGS FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Cruise_ID Cruise name according to the USGS Field Activity Collection USGS Coordinates defining the features. Date_UTC Date in UTC time zone; MM/DD/YYYY USGS Date of sample collection in MM/DD/YYYY format 20110625 20110630 Time_UTC Time of data collection in HH:MM UTC, 24 hour format USGS Time of data collection in HH:MM UTC Date_EDT Date in EDT time zone; MM/DD/YYYY USGS Date of sample collection in MM/DD/YYYY format 20110625 20110630 Time_EDT Time of data collection in HH:MM EDT, 24 hour format USGS Time of data collection in HH:MM EDT Latitude Latitude in decimal degrees WGS 1984 27.06688 29.20133 Longitude Longitude in decimal degrees WGS 1984 -85.8753 -83.03413 CO2 a measure of CO2 of a solution USGS 274.5 467.5 Temp_C water temperature USGS 28.59 30.84 Ship_Sal_P measurement of salt within a body of water (PSU) USGS 15.94 36.66 All attributes are common between the three data formats provided (.csv, .xls, .shp), except for the attributes FID and SHAPE (indicated by *), which are found only within the shapefile (.shp) because they are unique to that data type. Additionally, the GPS data was taken from the Weatherbird II's navigation logs and was matched with the time logs on the sonde. These data have not been QA/QC yet, and as such could have data errors due to tubes clogging, or flowthrough shutdown for inclement weather. Robbins, L.L., Knorr, P.O., Barrera, K.E., Daly, K.L., 2012, USGS Field Activities 11BHM01 and 11BHM02 on the West Florida Shelf, Gulf of Mexico, in May and June 2011: U.S. Geological Survey Data Series 712, available online at http://pubs.usgs.gov/ds/712/. U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Lisa Robbins mailing and physical address

600 4th Street South

St. Petersburg Florida 33701 US 727-502-8005 This digital publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Graphical map depictions are intended to be used within the map scale limits applicable to the source data. Although software enables the user to view data at various scales, the user is cautioned to refer to the source documentation for the appropriate map scale limitations. Microsoft Excel (.xls); Comma-delimited text file (.csv); ArcGIS (.SHP) Microsoft Excel (.xls); Comma-delimited text file (.csv); ArcGIS (.SHP) http://pubs.usgs.gov/ds/0712/data/2011_June/11BHM02_AFT_CO2.zip Free 20211109 United States Geological Survey, St. Petersburg Coastal and Marine Science Center SPCMSC Data Management Group mailing and physical address

600 4th Street South

St. Petersburg Florida 33701 US 727-502-8000 gs-g-spcmsc_data_inquiries@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998