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SAMI-CO2 pCO2 Temperature and Oxygen Time series dataset collected by ASIS spar buoys during RRS DISCOVERY Cruise D320 (DOGEE-II)
North Atlantic, ASIS-1 deployed at 43o41.5’N, 18o8.5’W, ASIS-2 deployed at 43o22.4’N, 17o51.4’W. ASIS-1 was recovered at 42o29.6’N, 15o55.3’W, ASIS-2 was recovered at 42o45.6’N, 15o55.8’W.
Sampling and Analytical Methodology: During the deployment 2 separate ASIS Buoys were deployed, ASIS-1 & ASIS-2, upon each of which 2 SAMIs were attached. Each buoy had 1 SAMI-CO2 attached at 1 meter and 1 SAMI-CO2 attached at 5 meters depth. The SAMI-CO2 sampled on a 30 minute interval and a non-absorbing blank measurement was taken every 3.5 days. PAR was measured by a Li-COR LI-192 underwater quantum sensor (not calibrated). Oxygen data was obtained using a calibrated Aanderaa O2 sensor (model 4175). Both the PAR and O2 sensors were attached to a SAMI-CO2 sensor. There is no pCO2 record at 1 meter on ASIS-2.
Data Processing: The data were interpolated to a 30 minute interval
BCO-DMO Processing Notes - Generated from the following list of original .xlsx files contributed by Cory Beatty DOGEE_ASIS1_1m_SAMICO2.xlsx DOGEE_ASIS1_5m_SAMICO2.xlsx DOGEE_ASIS2_1m_SAMICO2.xlsx DOGEE_ASIS2_5m_SAMICO2.xlsx - Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name - Date reformatted to YYYYMMDD - Time reformatted to HHMMSS
During the deployment 2 separate ASIS Buoys were deployed, ASIS-1 & ASIS-2, upon each of which 2 SAMIs were attached. Each buoy had 1 SAMI-CO2 attached at 1 meter and 1 SAMI-CO2 attached at 5 meters depth. The SAMI-CO2 sampled on a 30 minute interval and a non-absorbing blank measurement was taken every 3.5 days. PAR was measured by a Li-COR LI-192 underwater quantum sensor (not calibrated). Oxygen data was obtained using a calibrated Aanderaa O2 sensor (model 4175). Both the PAR and O2 sensors were attached to a SAMI-CO2 sensor. There is no pCO2 record at 1 meter on ASIS-2.
Aanderaa Oxygen Optodes are instrument for monitoring oxygen in the environment. For instrument information see the Aanderaa Oxygen Optodes Product Brochure.
See: Air-Sea Interaction Spar (ASIS) Buoy
The LI-192 Underwater Quantum Sensor (UWQ) measures underwater or atmospheric Photon Flux Density (PPFD) (Photosynthetically Available Radiation from 360 degrees) using a Silicon Photodiode and glass filters encased in a waterproof housing. The LI-192 is cosine corrected and features corrosion resistant, rugged construction for use in freshwater or saltwater and pressures up to 800 psi (5500 kPa, 560 meters depth). Typical output is in um s-1 m-2. The LI-192 uses computer-tailored filter glass to achieve the desired quantum response. Calibration is traceable to NIST. The LI-192 serial numbers begin with UWQ-XXXXX. LI-COR has been producing Underwater Quantum Sensors since 1973.
These LI-192 sensors are typically listed as LI-192SA to designate the 2-pin connector on the base of the housing and require an Underwater Cable (LI-COR part number 2222UWB) to connect to the pins on the Sensor and connect to a data recording device.
The LI-192 differs from the LI-193 primarily in sensitivity and angular response. 193: Sensitivity: Typically 7 uA per 1000 umol s-1 m-2 in water. Azimuth: < ± 3% error over 360° at 90° from normal axis. Angular Response: < ± 4% error up to ± 90° from normal axis. 192: Sensitivity: Typically 4 uA per 1000 umol s-1 m-2 in water. Azimuth: < ± 1% error over 360° at 45° elevation. Cosine Correction: Optimized for underwater and atmospheric use. (www.licor.com)
A sensor that measures the partial pressure of CO2 in water (pCO2)
The Submersible Autonomous Moored Instrument (SAMI) measures and logs levels of dissolved chemicals in sea and fresh water. It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA). For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.
General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).
Cruise Id
Expedition Name
Dataset/Deployment Id
Start Date of Dataset/Deployment (UTC)
Start Time of Dataset/Deployment (UTC)
Start Latitude of Dataset/Deployment (South is negative)
Start Longitude of Deployment (West is negative)
End Date of Dataset/Deployment (UTC)
End Time of Dataset/Deployment (UTC)
End Latitude of Dataset/Deployment (South is negative)
End Longitude of Deployment (West is negative)
Excel Date
Jan 1 = YD1
Date (UTC)
Time (UTC)
Temperature
Partial Pressure of Carbon Dioxide
PAR
O2
Latitude Position of ASIS Buoy at time of measurement (South is negative)
Longitude Position of ASIS Buoy at time of measurement (West is negative)
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