| Contributors | Affiliation | Role |
|---|---|---|
| DeGrandpre, Michael | University of Montana | Principal Investigator, Contact |
| Drennan, William M. | University of Miami Rosenstiel School of Marine and Atmospheric Science (UM-RSMAS) | Co-Principal Investigator |
| Gegg, Stephen R. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
SAMI-CO2 pCO2 & temperature mooring time series collected in the Labrador Sea.
Labrador Sea, deployed at 53.04N, 49.207W, 1 SAMI-CO2 deployed at each depth (1, 5, 10, 20 and 35 meters)
Related files and references:
DeGrandpre, M. D., Hammar, T. R., Smith, S. P., & Sayles, F. L. (1995). In situ measurements of seawater pCO2. Limnology and Oceanography, 40(5), 969–975. doi:10.4319/lo.1995.40.5.0969
Martz, T. R., DeGrandpre, M. D., Strutton, P. G., McGillis, W. R., & Drennan, W. M. (2009). Sea surfacepCO2and carbon export during the Labrador Sea spring-summer bloom: An in situ mass balance approach. Journal of Geophysical Research, 114(C9). doi:10.1029/2008JC005060
Labrador Sea, deployed at 53.04N, 49.207W, 1 SAMI-CO2 deployed at each depth (1, 5, 10, 20 and 35 meters)
Sampling and Analytical Methodology:
The SAMI-CO2s sampled on a 30 minute interval, a non-absorbing blank measurement was taken every 3.5 days.
Data Processing:
See DeGrandpre, et.al (1995). The data were interpolated to 30 minute intervals
BCO-DMO Processing Notes
- Generated from original "LabSea June-Aug 2004_SAMI-CO2.xlsx" file contributed by Cory Beatty
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date reformatted to YYYYMMDD
- Time reformatted to HHMMSS
| File |
|---|
LabSea.csv (Comma Separated Values (.csv), 376.45 KB) MD5:dbdd85b69f6d0383a5b351bc720e5d47 Primary data file for dataset ID 630619 |
| Parameter | Description | Units |
| Excel_Date | Excel Date | xxxxx.xxxx |
| Year_Day | Jan 1 = YD1 | xxx.xxxx |
| Date | Date (UTC) | YYYYMMDD |
| Time | Time (UTC) | HHMMSS |
| SAMI_52_1m_pCO2 | Partial Pressure of Carbon Dioxide – SAMI 52 at 1m | uatm |
| SAMI_52_1m_Temp | Temperature – SAMI 52 at 1m | oC |
| SAMI_11_5m_pCO2 | Partial Pressure of Carbon Dioxide – SAMI 11 at 5m | uatm |
| SAMI_11_5m_Temp | Temperature – SAMI 11 at 5m | oC |
| SAMI_51_10m_pCO2 | Partial Pressure of Carbon Dioxide – SAMI 51 at 10m | uatm |
| SAMI_51_10m_Temp | Temperature – SAMI 51 at 10m | oC |
| SAMI_12_20m_pCO2 | Partial Pressure of Carbon Dioxide – SAMI 12 at 20m | uatm |
| SAMI_12_20m_Temp | Temperature – SAMI 12 at 20m | oC |
| SAMI_50_35m_pCO2 | Partial Pressure of Carbon Dioxide – SAMI 50 at 35m | uatm |
| SAMI_50_35m_Temp | Temperature – SAMI 50 at 35m | oC |
| ASIS_Lat | Latitude Position of ASIS Buoy at time of measurement (South is negative) | decimal degrees |
| ASIS_Lon | Longitude Position of ASIS Buoy at time of measurement (West is negative) | decimal degrees |
| Dataset-specific Instrument Name | ASIS-1, ASIS-2 |
| Generic Instrument Name | Air-Sea Interaction Spar (ASIS) Buoy |
| Dataset-specific Description | 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. |
| Generic Instrument Description | See: Air-Sea Interaction Spar (ASIS) Buoy |
| Dataset-specific Instrument Name | SAMI-CO2 pCO2 |
| Generic Instrument Name | pCO2 Sensor |
| Dataset-specific Description | 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. |
| Generic Instrument Description | A sensor that measures the partial pressure of CO2 in water (pCO2) |
| Dataset-specific Instrument Name | SAMI-CO2 pCO2 |
| Generic Instrument Name | Submersible Autonomous Moored Instrument |
| Dataset-specific Description | 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. |
| Generic Instrument Description | 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. |
| Dataset-specific Instrument Name | SAMI-CO2 pCO2 and Temperature |
| Generic Instrument Name | Water Temperature Sensor |
| Dataset-specific Description | 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. |
| Generic Instrument Description | General term for an instrument that measures the temperature of the water with which it is in contact (thermometer). |
| Website | |
| Platform | Air-Sea Interaction Spar (ASIS) Buoy |
| Start Date | 2004-06-12 |
| End Date | 2004-08-25 |
| Description | Labrador Sea, deployed at 53.04N, 49.207W, 1 SAMI-CO2 deployed at each depth (1, 5, 10, 20 and 35 meters) |
ABSTRACT
A study of the air-sea flux of carbon dioxide and the surface physical processes controlling it will be conducted during the Labrador Sea spring bloom. The Labrador Sea is highly significant as one of the areas of North Atlantic Deep Water (NADW) formation. During the late spring months, the Labrador Sea experiences a strong plankton bloom, and is an intense sink for carbon dioxide. Deep convection during the subsequent winter mixes the carbon dioxide rich waters throughout the water column. The newly formed NADW is transported southward towards the Antarctic, via a system of deep currents. Given the circulation time scale of order 1000 years, atmospheric gases within the NADW are essentially sequestered. While mid-latitude areas of the global ocean are equally strong sinks of carbon dioxide, gases absorbed into the ocean at these latitudes remain in the near surface waters, and are returned to the atmosphere on the decadal time scale. Hence the gas exchange characteristics in the Labrador Sea are of particular interest because it is one of the few areas of the global ocean that is a long term carbon dioxide sink. The ability to predict and forecast air-sea carbon dioxide fluxes over large areas is also necessary to quantify the adjacent terrestrial carbon budget.
The broader impacts of this work relate to improvement of our ability to predict atmospheric carbon dioxide levels, and to assess how it might change climate under various scenarios. The large uncertainty surrounding the flux of carbon dioxide between the atmosphere and ocean prevent us from determining the partitioning of the sink of anthropogenic carbon dioxide between the ocean and the terrestrial biosphere. This uncertainty also limits our ability to accurately model future atmospheric carbon dioxide levels. The process study we have proposed will improve the accuracy of the global ocean carbon dioxide flux estimates and increase our understanding of the causes of its variability.
The project will involve students as undergraduate and post-graduate research assistants. The University of Miami is a Hispanic Serving Institution and thereby fosters the participation of under-represented groups in science and engineering. The data will be made available through several data bases via the World Wide Web. The project will contribute to the active outreach activities coordinated through the Dean's Office at the University of Miami.
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |