| Contributors | Affiliation | Role |
|---|---|---|
| Johnson, Zackary I. | Duke University | Principal Investigator, Contact |
| Hunt, Dana | Duke University | Co-Principal Investigator |
| Rauch, Shannon | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Dissolved oxygen concentration, percent oxygen saturation, and atmospheric (barometric) pressure measured at the Pivers Island Coastal Observatory (PICO) from 2010 to 2012.
Note: Not all parameters were not measured at all time points, thus, some dates have no data ('nd') in the 'O2', 'O2sat', and/or 'bar_press' columns.
Oxygen was measured optically in situ and atmospheric pressure was measured near the sea surface using a calibrated probe (YSI ProODO handheld meter) using the manufacturer's recommendations.
Quality Scores (qflag) as follows:
1 = excellent (no known issues),
2 = suspect,
3 = poor (known reason to suspect data).
BCO-DMO Processing Notes:
- Modified parameter names to conform with BCO-DMO naming conventions.
- Replaced blanks with 'nd' to indicate 'no data'.
- Separated date into month, day, and year columns.
| File |
|---|
oxygen_press.csv (Comma Separated Values (.csv), 32.46 KB) MD5:0a398f35a6bb629e4f3a06552c9eb67c Primary data file for dataset ID 4034 |
| Parameter | Description | Units |
| deployment | Deployment name/id number. | text |
| lat | Latitude of sampling location. Positive = North. | decimal degrees |
| lon | Longitude of sampling location. Positive = East. | decimal degrees |
| year | Year (local time) of the sampling event. | YYYY |
| month_local | Month (local time) when the sampling event occurred. | mm (01 to 12) |
| PID_num | Unique, sequential "occupation" number for sampling. (The unique time/day when sampling occurred.) | dimensionless |
| day_local | Day of month (local time) when the sampling event occurred. | dd (01 to 31) |
| time_local | Time (local) when the sampling event occurred; 24-hour clock. | HHMM.mm |
| time_qflag | Quality score for time_local: | dimensionless |
| depth | Depth of water sampling. | meters |
| O2 | Oxygen concentration measured optically in situ. | milligrams O2 per liter (mg/L) |
| O2_qflag | Quality score for O2: | dimensionless |
| O2sat | Percent oxygen saturation; percent of theoretical saturation value for a given temperature, salinity and pressure. | % |
| O2sat_qflag | Quality score for O2sat: | dimensionless |
| press_bar | Atmospheric (barometric) pressure measured near the sea surface using a calibrated probe. | hectopascals (hPa) |
| press_bar_qflag | Quality score for press_bar: | dimensionless |
| yrday | Consecutive day of year for a specified year, as a decimal. The fraction of the value represents the time within the day (e.g. a value of 1.5 means January 1 at 1200 hours). | dimensionless |
| ISO_DateTime_Local | Date-time (local) formatted to ISO 8601 standard. | YYYY-MM-DDTHH:MM:SS.ss |
| Dataset-specific Instrument Name | Dissolved Oxygen Sensor |
| Generic Instrument Name | Oxygen Sensor |
| Dataset-specific Description | A YSI ProODO (Optical Dissolved Oxygen) handheld meter was used. The YSI ProODO meter measures dissolved oxygen (% and mg/L), temperature, and barometric pressure. See more information from the manufacturer. |
| Generic Instrument Description | An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed |
| Website | |
| Platform | Duke University Marine Lab |
| Start Date | 2010-06-28 |
| End Date | 2012-06-26 |
| Description | The PICO time series is sampled weekly (or more frequently) to capture physical, chemical and biological variability in the coastal ocean. This time series enables the investigator to collaborate with a number of researchers and will serve as a long-term research focus.
Project information: http://oceanography.ml.duke.edu/johnson/research/pico/ |
From the project website:
Carbon dioxide is rising at ~3% per year in the atmosphere and oceans leading to increases in dissolved inorganic carbon and a reduction in pH. This trend is expected to continue for the foreseeable future and ocean pH is predicted to decrease substantially making the ocean more acidic, potentially affecting the marine ecosystem. However, coastal estuaries are highly dynamic systems that often experience dramatic changes in environmental variables over short periods of times. In this study, the investigators are measuring key variables of the marine carbon system along with other potential forcing variables and characteristics of the ecosystem that may be affected by these pH changes. The goal of this project is to determine the time-scales and magnitude of natural variability that will be superimposed on any long term trends in ocean chemistry.
Other PICO-related projects in BCO-DMO:
Ocean Acidification: microbes as sentinels of adaptive responses to multiple stressors: contrasting estuarine and open ocean environments
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) | |
| NSF Ocean Sciences Research Initiation Grants (NSF OCE-RIG) |