Lisa L. Robbins Kira E. Barrera Kendra L. Daly Paul O. Knorr 2014 Sonde data of continuous surface water flow-through system for the West Florida Shelf tabular and vector digital data Data Series 883 St. Petersburg, Fla U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center http://dx.doi.org/10.3133/ds883 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 on the West Florida Shelf and northern Gulf of Mexico regions aboard the R/V Weatherbird II, a ship of opportunity led by Kendra Daly of the University of South Florida (USF). Cruises left from and returned to Saint Petersburg, Florida, but followed different routes (see Trackline). The USGS collected data pertaining to pH, dissolved inorganic carbon (DIC), and total alkalinity in discrete samples. Discrete surface samples were taken hourly while in transit during cruises. Along with the surface samples, another set of discrete samples were taken at various depths at stations. In addition to the discrete samples, flow-through data were collected on cruises in a variety of forms. Surface CTD data were collected every five minutes and included temperature, salinity, and pH. Two additional flow-through instruments were setup to record pH and CO2 every 15 minutes. Vertical CTD profiles were collected by USF, using the following sensors: CTD, oxygen, chlorophyll fluorescence, optical backscatter, and transmissometer, corroborating USGS data. Additionally, discrete depth samples for nutrients, chlorophyll, and particulate organic carbon/nitrogen were collected. Discrete water samples were collected underway to corroborate the continuous partial pressure of carbon dioxide (pCO2) measurements. Water samples were analyzed for salinity, pH, and total alkalinity at the USGS geochemistry laboratory in St. Petersburg, Florida. These continuous flow-through data are used to corroborate the discrete sample data using CO2SYS. The USGS Saint Petersburg Coastal and Marine Science Center (SPCMSC) - St. Petersburg, Fla, assigns a unique identifier to each cruise or field activity. For example, 12BHM01 indicates the data were collected in 2012 for Benthic Habitat Mapping and the data were collected during the first 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. This publication contains data for each of the five benthic habitat cruises conducted aboard the Research Vessels (R/V) Weatherbird II and Bellows in 2012: 12BHM01 February 15-24 (Weatherbird II), 12BHM02 April 24 - 29 (Bellows), 12BHM03 May 8 - 17 (Weatherbird II), 12BHM04 June 29 - July 1 (Bellows) and 12BHM05 August 2 - 12 (Weatherbird II). 2012 data collection Complete None planned -89.0000 -82.5000 30.0000 27.0000 None pH total carbon Salinity carbon flux Ocean Acidification pCO2 Temperature Ocean Chemistry None West Florida Shelf Florida United States None Mesopelagic Epipelagic ocean surface Bathypelagic None 2012 None USGS and USF request to be acknowledged as originators of the data in future products or derivative research. USGS St. Petersburg Coastal and Marine Science Center Lisa Robbins Research Oceanographer mailing and physical 600 4th Street South St. Petersburg Florida 33701 US 727-502-8004 727-502-8182 lrobbins@usgs.gov 8am to 5pm M-F EST Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.4.4000 These data were collected in the field and were not checked for internal consistencies. These data were collected along tracklines (2-D) and are therefore inherently incomplete. No data were collected between tracklines. A YSI 6600 conductivity-temperature-depth (CTD) sonde coupled with a YSI 650 Multi-Parameter Display System (MDS) was deployed to provide temperature and salinity values for water chemistry calculations during the cruise. Seawater scale pH values were also recorded. The sonde was located in the wet lab of the R/V. The sonde was attached to a seawater flow-through system that siphoned water from approximately 4 feet below the water's surface. The flow rate varied with weather condition and measurements were stopped in 6 foot and higher waves. Data values were logged at 5 minute intervals. The ship’s cruising speed was 9 knots. 2012 Data exported from YSI 650 MDS and converted to comma deliminated file (CDF) within EcoWatch software. These data were imported into Microsoft Excel and formatted into a single spreadsheet. Data from GPS with latitude/longitude were joined to water parameters using time and date stamps. 2012 2012__Sonde.csv 2012__Sonde.xls The spreadsheet was imported into ArcGIS 10 and converted into a shapefile. 2012__Sonde.xls 2012 2012__Sonde.shp 8.9831528411952133e-009 8.9831528411952133e-009 Decimal Degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 2012__Sonde Physical and chemical measurements of surface water from a YSI sonde 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 12BHM01, 12BHM02, 12BHM03, 12BHM04, 12BHM05 Date_UTC Date in UTC time zone; MM/DD/YYYY USGS Date of sample collection in MM/DD/YYYY format Time_UTC Time of data collection in HH:MM UTC, 24 hour format USGS Time of data collection in HH:MM UTC Date_EDT_or_EST Date in EDT or EST time zone; MM/DD/YYYY USGS Date of sample collection in MM/DD/YYYY format Time_EDT_or_EST Time of data collection in HH:MM EDT, 24 hour format USGS Time of data collection in HH:MM EDT or EST Latitude Latitude in decimal degrees USGS decimal degrees Longitude Longitude in decimal degrees USGS decimal degrees Temp_C water temperature USGS degrees Celsius Sp_Cond Specific conductivity USGS siemens per meter Sal_PSU Salinity in Practical Salinity Units USGS Practical Salinity Units pH measure of acidity or alkalinity USGS ODO Optical Disolved Oxygen % USGS Chlorophyl water chlorophyll USGS mg chlorophyll per liter of water 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 were taken from either the R/V Weatherbird II's or Bellow's navigation logs and matched with the time logs on the sonde. These data were not QA/QC checked and could have data errors due to tubes clogging or from flow-through shutdown due to inclement weather. USGS St. Petersburg Coastal and Marine Science Center Lisa Robbins mailing and physical 600 4th Street South St. Petersburg Florida 33701 US 727-502-8004 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) ZIP File Format http://dx.doi.org/10.3133/ds883 Free 2012 USGS St. Petersburg Coastal and Marine Science Center Kira Barrera Research Assistant mailing and physical 600 4th Street South St. Petersburg Florida 33701 US 727-502-8044 727-502-8044 kbarrera@usgs.gov 8am to 5pm M-F EST FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time