Water temperature from Niskin bottle samples measured at the PICO time-series station (34.7181 deg N, 76.6707 deg W) from 2010-2012 (PICO project)

Website: https://www.bco-dmo.org/dataset/4037
Version: 03 Sept 2013
Version Date: 2013-09-03

» Pivers Island Coastal Observatory (PICO)
Johnson, Zackary I.Duke UniversityPrincipal Investigator, Contact
Hunt, DanaDuke UniversityCo-Principal Investigator
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Dataset Description

Water temperature measured at the Pivers Island Coastal Observatory (PICO) from 2010 to 2012.

Note: Temperature was not measured at all time points, thus, some dates have no data ('nd') in the 'temp_bot' column.

Methods & Sampling

Water was sampled using a 5 L niskin bottle centered at 1 m with a bottle length of 0.7 m. Temperature was measured in duplicate using NIST traceable thermocouples (VWR#23609-232).

Data Processing Description

Quality Scores (qflag) as follows:
1 = excellent (no known issues),
2 = suspect,
3 = poor (known reason to suspect data).

BCO-DMO Processing Notes:
- Created 'replicate' column and re-arranged data so that replicates are in rows, not columns.
- 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.

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Data Files

(Comma Separated Values (.csv), 55.16 KB)
Primary data file for dataset ID 4037

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deploymentDeployment name/id number. text
latLatitude of sampling location. Positive = North. decimal degrees
lonLongitude of sampling location. Positive = East. decimal degrees
yearYear (local time) of the sampling event. YYYY
month_localMonth (local time) when the sampling event occurred. mm (01 to 12)
PID_numUnique, sequential "occupation" number for sampling. (The unique time/day when sampling occurred.) dimensionless
day_localDay of month (local time) when the sampling event occurred. dd (01 to 31)
time_localTime (local) when the sampling event occurred; 24-hour clock. HHMM.mm
time_qflagQuality score for time_local: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data). dimensionless
depthDepth of water sampling. meters
replicateReplicate identifier. (All of the "A" temperatue samples are from the same bottle, however "A" replicates for temperature are unrelated to "A" replicates in the other PICO datasets.) text
temp_botTemperature from Niskin bottle samples. degrees Celsius
temp_bot_qflagQuality score for temp_bot: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data). dimensionless
yrdayConsecutive 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_LocalDate-time (local) formatted to ISO 8601 standard. YYYY-MM-DDTHH:MM:SS.ss

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Dataset-specific Instrument Name
Niskin bottle
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
Water Temperature Sensor
Generic Instrument Name
Water Temperature Sensor
Dataset-specific Description
Temperature was measured in duplicate using NIST traceable thermocouples (VWR#23609-232)
Generic Instrument Description
General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).

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Duke University Marine Lab
Start Date
End Date
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/

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Project Information

Pivers Island Coastal Observatory (PICO)

Coverage: 34.7181 deg N, 76.6707 deg W

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.

This project is associated with Ocean Acidification: microbes as sentinels of adaptive responses to multiple stressors: contrasting estuarine and open ocean environments.

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Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Ocean Sciences Research Initiation Grants (NSF OCE-RIG)

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