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| You are here: NODC Home > Access Data > Gulf of Mexico Data and Information > Deepwater Horizon Incident Support > Ocean Profile Data |
Ocean Profile Data: Deepwater Horizon SupportDeepwater Horizon Support Page [ Gordon Gunter CTD/XBT | AXBT | Gliders | Floats | Unidentified-Platforms | Walton Smith XBT | Nancy Foster CTD/XBT ] Gordon Gunter Conductivity-Temperature-Depth (CTD) and eXpendable BathyThermograph (XBT) Observations
More processed data and originator data files from ship Gordon Gunter What is a CTD? An ocean instrument that has a combination of a pressure sensor (measured pressure is converted to depth), a resistance temperature measurement device (usually a platinum thermometer), and a conductivity sensor used to estimate salinity. CTDs are usually mounted on a metal frame and lowered through the water column suspended from a cable. What is an XBT? It's a probe that is dropped from a ship and measures the water temperature as it falls. A very thin wire transmits the temperature data to the ship where it is recorded for later analysis. The probe is designed to fall at a known rate, so that the depth of the probe can be inferred from the time lapsed from launch. Example CTD Plot
 Gordon Gunter Stations
If you would like to interact with these maps within Google Earth, please download the appropriate .kmz file. Airborne eXpendable BathyThermograph (AXBT) ObservationsAXBT data and plots are available from two NOAA aircraft. The location of AXBT deployments (circles) for each mission are shown on the map below. This data was collected on various days between May 18 and July 9, 2010 (see inventory files below). NOAA42 Collected temperature and salinity using 9 AXCTD's and 281 AXBT's from May 08 - July 24, 2010. NOAA49 Collected temperature using 63 AXBT's from May 18 - July 21, 2010. If you would like to interact with these maps within Google Earth, please download the appropriate .kmz file. What is an AXBT? It's a water temperature probe, like the shipboard XBT explained above, except that it is dropped from an aircraft. Likewise, an AXCTD is a CTD lowered from an aircraft. Glider DataGlider 48900 collected 893 profiles of temperature and 893 profiles of salinity (1786 total) from May 28, 2010 - June 21, 2010: Glider 48901 collected 3648 profiles of temperature and 3648 profiles of salinity (7296 total) from May 28, 2010 - July 28 2010: Glider 48902 collected 526 profiles of temperature and 526 profiles of salinity (1052 total) from May 28, 2010 - July 28, 2010: Glider 48903 collected 2936 profiles of temperature and 2936 profiles of salinity (5872 total) from June 4, 2010 - July 26, 2010: Glider 48904 collected 2166 profiles of temperature and 2166 profiles of salinity (4332 total) from June 4, 2010 - June 27, 2010: Glider 48905 collected 4260 profiles of temperature and 4260 profiles of salinity (8520 total) from June 8, 2010 - July 12, 2010: Glider 48906 collected 9336 profiles of temperature and 9336 profiles of salinity (18672 total) from June 21, 2010 - July 28, 2010: Glider 48908 collected 176 profiles of temperature and 172 profiles of salinity (348 total) from June 22, 2010 - July 27, 2010: Glider 48909 collected 148 profiles of temperature and 144 profiles of salinity (292 total) from June 22, 2010 - July 27, 2010: What is a Glider? An underwater glider is a type of autonomous underwater vehicle (AUV) that uses small changes in its buoyancy in conjunction with wings to convert vertical motion to horizontal, and thereby propel itself forward with very low power consumption. Gliders typically take measurements such as temperature, conductivity (to calculate salinity), currents, chlorophyll fluorescence, optical backscatter, bottom depth, and (occasionally) acoustic backscatter. They navigate with the help of periodic surface GPS fixes, pressure sensors, tilt sensors, and magnetic compasses. Gliders can be built to withstand various depths and pressures. If you would like to interact with this map within Google Earth, please download the appropriate .kmz file. Float DataFloat 4901043 collected 1 profiles of temperature and 1 profiles of salinity (2 total) from July 12, 2010 - July 12, 2010: Float 4901044 collected 4 profiles of temperature and 4 profiles of salinity (8 total) from June 17, 2010 - July 17, 2010: Float 4901265 collected 15 profiles of temperature and 15 profiles of salinity (30 total) from May 24, 2010 - July 27, 2010: Float 4901266 collected 16 profiles of temperature and 16 profiles of salinity (32 total) from May 26, 2010 - July 25, 2010: Float 4901267 collected 16 profiles of temperature and 16 profiles of salinity (32 total) from May 26, 2010 - July 25, 2010: Float 4901268 collected 11 profiles of temperature and 11 profiles of salinity (22 total) from May 26, 2010 - July 13, 2010: Float 4901269 collected 16 profiles of temperature and 16 profiles of salinity (32 total) from May 26, 2010 - July 25, 2010: Float 4901270 collected 16 profiles of temperature and 16 profiles of salinity (32 total) from May 27, 2010 - July 25, 2010: Float 4901271 collected 6 profiles of temperature and 6 profiles of salinity (12 total) from July 5, 2010 - July 25, 2010: Float 4901272 collected 6 profiles of temperature and 6 profiles of salinity (12 total) from July 4, 2010 - July 25, 2010: Float 4901273 collected 1 profiles of temperature and 1 profiles of salinity (2 total) from July 4, 2010 - July 4, 2010: What is a Float? Floats, sometimes referred to as ocean profiling floats, are designed to drift at a fixed pressure and depth. After a certain time period, the floats move upward in the water column collecting profiles of pressure, temperature, and salinity data on their way to the surface. Once at the surface, the floats remain there for under a day, transmitting the data collected by satellite back to NOAA, and thereby allowing one to determine their surface drift. They then sink again, and repeat their mission. Floats usually have a nominal lifetime of five years, and will yield valuable information about large-scale ocean water property distributions and currents, including their variability over time. If you would like to interact with this map within Google Earth, please download the appropriate .kmz file. Unidentified-Platforms DataIncluded in these files are data from several vessels, including one aircraft survey. Several surveys were conducted April 22, 2010 - June 17, 2010 and posted to the GTS as unidentified vessels, so all the call signs were set to "SHIP". Temperature and salinity values were measured from 94 CTDs and 60 XBTs and are available in CSV (comma separated value), NetCDF (network common data format), and GTSPP ASCII formats (format description). An inventory file is available. The "plots" folder contains plots of each vertical profile, and a .kmz file is available for Google Earth display. If you would like to interact with the map below (i.e., click on stations to get more information), please install Google Earth and use the .kmz file for each. Walton Smith eXpendable BathyThermograph (XBT) ObservationsThese data from June 7th to June 10th, 2010 have 41 stations with 41 temperature profiles. See map below. The data are available in three commonly used formats, namely CSV (comma separated value), NetCDF (network common data form) and GTSPP ASCII formats (format description). A NetCDF inventory file is available. In addition, the “plots” folder contains plots of each vertical profile. A .kmz file is available for Google Earth display. What is an XBT? It's a probe that is dropped from a ship and measures the water temperature as it falls. A very thin wire transmits the temperature data to the ship where it is recorded for later analysis. The probe is designed to fall at a known rate, so that the depth of the probe can be inferred from the time lapsed from launch. Example data points
 Walton Smith Stations
 Interact with the Walton Smith XBT Google Map If you would like to interact with this map within Google Earth, please download the appropriate .kmz file. Nancy Foster Conductivity-Temperature-Depth (CTD) and eXpendable BathyThermograph (XBT) ObservationsThese data from July 1st to July 18th, 2010 have 210 stations with 25 CTD's and 185 XBT's. See map below. The data are available in three commonly used formats, namely CSV (comma separated value), NetCDF (network common data form) and GTSPP ASCII formats (format description). A NetCDF inventory file is available. In addition, the “plots” folder contains plots of each vertical profile. A .kmz file is available for Google Earth display. Nancy Foster Stations  Interact with the Nancy Foster XBT Google Map If you would like to interact with this map within Google Earth, please download the appropriate .kmz file. What is a CTD? An ocean instrument that has a combination of a pressure sensor (measured pressure is converted to depth), a resistance temperature measurement device (usually a platinum thermometer), and a conductivity sensor used to estimate salinity. CTDs are usually mounted on a metal frame and lowered through the water column suspended from a cable. What is an XBT? It's a probe that is dropped from a ship and measures the water temperature as it falls. A very thin wire transmits the temperature data to the ship where it is recorded for later analysis. The probe is designed to fall at a known rate, so that the depth of the probe can be inferred from the time lapsed from launch. Processed Data and Originator Data Files from Ships |
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Water temperature and salinity data were collected by the NOAA Ship 
