| Contributors | Affiliation | Role |
|---|---|---|
| Davis, Catherine | University of South Carolina at Columbia | Principal Investigator |
| Copley, Nancy | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
This dataset includes bulk nitrogen and organic carbon isotopes and sinking flux from a Santa Barbara Basin sediment trap time-series (1994-2017).
Will be available once the paper is published.
BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- re-formatted date from m/d/yyyy to yyyy-mm-dd
| File |
|---|
TableS1_CNflux.csv (Comma Separated Values (.csv), 20.58 KB) MD5:fe9615e957479cc7f931182499f73021 Primary data file for dataset ID 773318 |
| Parameter | Description | Units |
| Deployment | Sediment trap deployment identifier | unitless |
| Cup | Sediment trap cup identifier | unitless |
| Date_opened | First day cup was open to vertical flux | unitless |
| delta15N | Bulk sediment nitrogen isotopes ratio of stable isotopes 15N:14N | parts per thousand (per mil) |
| delta13C_org | Bulk sediment organic carbons isotopes ratio of stable isotopes 13C:12C | parts per thousand (per mil) |
| C_flux | Total carbon flux | grams/meter^2/day |
| N_flux | Total nitrogen flux | grams/meter^2/day |
| Dataset-specific Instrument Name | |
| Generic Instrument Name | Sediment Trap |
| Generic Instrument Description | Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator. |
| Dataset-specific Instrument Name | Perkin Elmer 2400 CHNS/O Elemental Analyzer |
| Generic Instrument Name | CHN Elemental Analyzer |
| Generic Instrument Description | A CHN Elemental Analyzer is used for the determination of carbon, hydrogen, and nitrogen content in organic and other types of materials, including solids, liquids, volatile, and viscous samples. |
| Dataset-specific Instrument Name | VG Isoprime IRMS |
| Generic Instrument Name | Mass Spectrometer |
| Generic Instrument Description | General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components. |
NSF Abstract:
More than one-quarter of anthropogenic CO2 emissions produced since the beginning of the Industrial Revolution have been incorporated into the global surface ocean causing large-scale declines in seawater pH. This phenomenon is referred to as ocean acidification (OA) and is predicted to become particularly acute in coastal regions, including the west coast of the US. As the oceans become more acidic, it will become increasingly difficult for marine calcifiers to produce their shells. This may have important consequences for the marine food web and for various commercially important marine species. This study will produce the first detailed record of changes in OA along the coast of California during the last two centuries. This will be accomplished by examining the shells of a group of calcifying plankton called foraminifera. These organisms live and produce their shells at the sea surface, with the shells sinking to the sea floor when the organism dies. Foraminiferal shells from a sediment core collected from Santa Barbara Basin will be studied in order to reconstruct changes in calcification over the last 200 years. Using these results, predictions will be made as to how calcification will continue to change through the end of the 21st century based on various scenarios for increasing atmospheric CO2.
Modeling studies suggest that the California Current System (CCS) and associated ecosystem have been and will continue to be particularly vulnerable to ocean acidification (OA). To test this concept, this study will quantify the effect of OA on calcification rates in planktonic foraminifera from the Santa Barbara Basin region of the CCS since the onset of the Industrial Revolution. A 20-year Santa Barbara Basin sediment trap time series, together with the varved sediments from the basin will be used to generate a nearly annually resolved record of changes in calcification for this group of plankton in the CCS for the last 200 years. The proposed research will take place in two phases. First, sediment trap samples and coincident water column chemistry data will be used to calibrate the relationships among foraminiferal shell morphology (area density), shell geochemistry (B/Ca), and water column carbonate chemistry. Second, these morphologic and trace metal proxies will be used to produce two independent records of changing carbon ion concentration for the last two centuries using a 210Pb-dated varved sediment record. These sediment-derived estimates of carbon ion concentration will be compared with model estimates of this parameter for the last two centuries. Taken together, the sediment trap and core samples will provide an incomparable archive for quantifying the impact of OA on calcification in this paleoclimatically important group of plankton.
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |