Dataset: CO2
Deployment: Lake_Michigan_ferry_2017-2021

CO2

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/737667

Principal Investigator:

Harvey Bootsma (University of Wisconsin, UW-Milwaukee)

Co-Principal Investigator:

Qian Liao (University of Wisconsin, UW-Milwaukee)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Regulation of plankton and nutrient dynamics by hydrodynamics and profundal filter feeders (Filter Feeders Physics and Phosphorus)

Current State:

Final with updates expected

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Description

Continuous CO2 data from from a Lake Michigan collected during 2017-2019 and in 2021. No samples were collected in 2020, due to COVID-19 restrictions. The sampling system is mounted in the engine room of the Lake Express high-speed ferry, where it draws water from a sea chest that has a residence time of several seconds.

Methods & Sampling

Dataset acquisition description

Continuous CO₂: The components of the continuous CO2 monitoring system include a peristaltic pump that forces water through an air-water equilibrator (Membrana mini-module membrane contactor). Reverse-flow air from the equilibrator is pumped through desiccant, after which it flows through an infrared gas analyzer (Li-Cor Li-820) which measures the partial pressure of CO2 normalized to 1 atmosphere. The system also includes a temperature sensor and a WETLabs flow-through fluorometer. The system is controlled by a Campbell CR1000 Controller / Datalogger. Input from a GPS on the ship's upper deck allows all data to be geo-referenced. The system is mounted in the engine room of the Lake Express high-speed ferry, where it draws water from a sea chest that has a residence time of several seconds. Additional details are provided in Zagorski and Bootsma (2006).

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
NA16NOS0120025	Great Lakes Observing System
OCE-1658390	NSF Division of Ocean Sciences

Instruments

CO2 Analyzer

Supplied Name: Li-Cor Li-820

Supplied Description:

Instrument Type

Generic Name: CO2 Analyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/382/

Generic Description:

Measures atmospheric carbon dioxide (CO2) concentration.

Fluorometer

Supplied Name: WETLabs flow-through fluorometer

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
ISO_DateTime_UTC	UTC date and time formatted to ISO 8601 standard. Local time + 5 hours between March 12, 2:00 a.m. and November 5, 2:00 a.m. Local time + 6 hours between November 5, 2:00 a.m. and March 12, 2:00 a.m.	unitless	ISO_DateTime_UTC
Year	Year	unitless	year
Lat	Latitude. Locations south of equator are negative. Resolution = 0.00001; accuracy = 0.00017.	Decimal degrees	lat
Long	Longitude. Locations west of prime meridian are negative. Resolution = 0.00001; accuracy = 0.00024.	Decimal degrees	lon
Speed	Speed of ferry on which CO2 system is installed; resolution = 0.1; accuracy = 0.5	Knots (multiply X 0.5144 for meters per second)	sog
P_kPa	Pressure in Li-Cor infrared gas analyzer; resolution = 01; accuracy = 0.5	kPa	press
AtmP	Ambient atmospheric pressure; resolution = 01; accuracy = 0.5	kPa	press_bar
WaterCO2	Partial pressure of carbon dioxide (pCO2) in the water body as measured with an infrared gas analyzer in a gas stream that has been equilibrated with the water; resolution = 0.1; accuracy = ±3%; detection limit = 0.5.	micro atmospheres (uatm)	pCO2
AirCO2	Partial pressure of carbon dioxide in air; resolution = 0.1; accuracy = ±3%; detection limit = 1	micro atmospheres (uatm)	no_bcodmo_term

Database

Contribute Data

Dataset: CO2
Deployment: Lake_Michigan_ferry_2017-2021

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CO2Deployment: Lake_Michigan_ferry_2017-2021

Dataset acquisition description

Dataset Processing Description

Dataset: CO2
Deployment: Lake_Michigan_ferry_2017-2021