Dataset: turbidity
Deployment: PICO_1-301

Turbidity measured at the PICO time-series station.

Principal Investigator:

Zackary I. Johnson (Duke University)

Co-Principal Investigator:

Dana Hunt (Duke University)

Contact:

Zackary I. Johnson (Duke University)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Pivers Island Coastal Observatory (PICO)

Current State:

Final with updates expected

Version:

30 Aug 2013

Deployment Synonyms:

PICO

Version Date:

2013-08-30

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/456098/data

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Description

Turbidity (in Nephelometric Turbidity Units [NTU]) measured at the Pivers Island Coastal Observatory (PICO) from 2010 to 2012.

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

Methods & Sampling

Dataset acquisition description

Turbidity was measured in duplicate on discrete samples using a calibrated handheld turbidimeter (Orion AQ4500).

Data Processing Description

Dataset 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.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1031064	NSF Division of Ocean Sciences
OCE-RIG-1322950	NSF Ocean Sciences Research Initiation Grants

Instruments

Turbidity Meter

Supplied Description:

An Orion AQ4500 Turbidimeter was used to measure turbidity of discrete samples.

Instrument Type

Generic Name: Turbidity Meter

Generic Description:

A turbidity meter measures the clarity of a water sample. A beam of light is shown through a water sample. The turbidity, or its converse clarity, is read on a numerical scale. Turbidity determined by this technique is referred to as the nephelometric method from the root meaning "cloudiness". This word is used to form the name of the unit of turbidity, the NTU (Nephelometric Turbidity Unit). The meter reading cannot be used to compare the turbidity of different water samples unless the instrument is calibrated. Description from: http://www.gvsu.edu/wri/education/instructor-s-manual-turbidity-10.htm

(One example is the Orion AQ4500 Turbidimeter)

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
deployment	Deployment name/id number.	text	deployno
lat	Latitude of sampling location. Positive = North.	decimal degrees	lat
lon	Longitude of sampling location. Positive = East.	decimal degrees	lon
year	Year (local time) of the sampling event.	YYYY	year
month_local	Month (local time) when the sampling event occurred.	mm (01 to 12)	month_local
PID_num	Unique, sequential "occupation" number for sampling. (The unique time/day when sampling occurred.)	dimensionless	no_bcodmo_term
day_local	Day of month (local time) when the sampling event occurred.	dd (01 to 31)	day_local
time_local	Time (local) when the sampling event occurred; 24-hour clock.	HHMM.mm	time_local
time_qflag	Quality score for time_local: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data).	dimensionless	q_flag
depth	Depth of water sampling.	meters	depth
replicate	Replicate identifier. (All of the "A" turbidity samples are from the same bottle, however "A" replicates for turbidity are unrelated to "A" replicates in the other PICO datasets.)	text	replicate
turbidity	Turbidity measured in duplicate on discrete samples using a calibrated handheld turbidimeter.	Nephelometric Turbidity Units (NTU)	turbidity
turbidity_qflag	Quality score for turbidity: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data).	dimensionless	qflag
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	yrday
ISO_DateTime_Local	Date-time (local) formatted to ISO 8601 standard.	YYYY-MM-DDTHH:MM:SS.ss	ISO_DateTime_Local

Database

Contribute Data

Dataset: turbidity
Deployment: PICO_1-301

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: turbidityDeployment: PICO_1-301

Dataset acquisition description

Dataset Processing Description

Dataset: turbidity
Deployment: PICO_1-301