| Contributors | Affiliation | Role |
|---|---|---|
| Blough, Neil V. | University of Maryland - College Park (UMD) | Principal Investigator, Contact |
| Del Vecchio, Rossana | University of Maryland - College Park (UMD) | Co-Principal Investigator |
| York, Amber D. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
This dataset has been submitted to BCO-DMO and is in the process of being served.
Related Datasets:
* Absorption coefficients: https://www.bco-dmo.org/dataset/735970
* CTD profiles: https://www.bco-dmo.org/dataset/734763
Water samples were collected using a CTD rosette with Niskin bottles and immediately transferred into acid rinsed carboys (20 L). Samples were then filtered through a 0.2 mm maxi capsule filter (Pall Corporation) prior to the acquisition of measurements.
Total organic carbon measurements were acquired using a Shimadzu TOC- 5000A analyzer. The pH sensor was set to output the average and standard deviation of several injections, the number of which is determined by the CV set to be less than 3%.
BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
| Parameter | Description | Units |
| Depth | Depth | meters (m) |
| TOC | Total organic carbon (TOC) | micromolar carbon (uM C) |
| SD | Standard deviation of total organic carbon (TOC) | micromolar carbon (uM C) |
| Dataset-specific Instrument Name | SBE 911plus / 917plus CTD |
| Generic Instrument Name | CTD Sea-Bird SBE 911plus |
| Generic Instrument Description | The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics |
| Dataset-specific Instrument Name | |
| Generic Instrument Name | Niskin bottle |
| Generic Instrument Description | A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. |
| Dataset-specific Instrument Name | Shimadzu TOC- 5000A analyzer |
| Generic Instrument Name | Shimadzu TOC-L Analyzer |
| Dataset-specific Description | The instrument was set up to print the average and SD of several injections, the number of which is determined by the CV set to be less than 3%. |
| Generic Instrument Description | A Shimadzu TOC-L Analyzer measures DOC by high temperature combustion method.
Developed by Shimadzu, the 680 degree C combustion catalytic oxidation method is now used worldwide. One of its most important features is the capacity to efficiently oxidize hard-to-decompose organic compounds, including insoluble and macromolecular organic compounds. The 680 degree C combustion catalytic oxidation method has been adopted for the TOC-L series.
http://www.shimadzu.com/an/toc/lab/toc-l2.html |
| Website | |
| Platform | R/V Kilo Moana |
| Start Date | 2014-12-08 |
| End Date | 2014-12-12 |
Chromophoric dissolved organic matter (CDOM) is optically measured material in the oceans resulting from the degradation of organic matter. While the importance of CDOM in the optical properties and biogeochemistry of marine waters has been well established over the last several decades, the source and structure of this material within the ocean basins remains unclear. Some studies indicate that CDOM is produced primarily in situ from either the chemical or biological processing of marine materials, while others have provided evidence that CDOM is primarily a remnant of terrestrial matter that has been diluted and modified during transit to and within the oceans. In this study, researchers from the University of Maryland Center for Environmental Studies will use complete spectral absorption and emission properties combined with chemical and mass spectral tests on samples from the North Pacific Ocean to determine the source and structure of CDOM. The results will be compared with those previously acquired, or to be acquired, from the Delaware Bay, the Middle Atlantic Bight, and the Equatorial Atlantic. By employing this multifaceted approach, the researchers will significantly advance our knowledge of CDOM.
Broader Impacts: This project will provide support for graduate and undergraduate student training, and results will be broadly disseminated through peer-reviewed research publications and presentations at national meetings, where student-led presentations will be emphasized.
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |