<div><p><strong>Continuous CO₂:</strong> 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).</p></div>
CO2
<div><p>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.</p></div>
CO2
737667
CO2
2018-05-25T15:11:31-04:00
2018-05-25T15:11:31-04:00
2024-02-12T15:54:17-05:00
urn:bcodmo:dataset:737667
Versions 1 and 2:
- modified parameter names to conform with BCO-DMO naming conventions;
- re-formatted date to ISO format;
- replaced missing data with nd ("no data");
- updated to version 2 on 21-May-2019.
Version 3:
- converted date/time field to ISO 8601 format;
- modified parameter names to conform with BCO-DMO naming conventions;
- removed 'nd' and 'NA' as missing data identifiers (missing data are empty/blank in the final CSV file);
- updated to version 3 on 2023-12-20 and saved the final file as "737667_v3_lake_michigan_co2.csv".
Continuous CO2 data from a Lake Michigan transect between Milwaukee, Wisconsin and Muskegon, Michigan collected during 2017, 2018, 2019, and 2021
This dataset provides CO2 data collected during 2017, 2018, 2019, and 2021 from a Lake Michigan transect between Milwaukee, Wisconsin and Muskegon, Michigan.
Water chemistry and conductivity-temperature-depth (CTD) profiles were measured at several stations in Lake Michigan, ranging in depth from 10 to 55 m, in a region northeast of Milwaukee Harbor. Measurements included soluble reactive phosphorus, total dissolved phosphorus, particulate phosphorus, chlorophyll a, the concentrations and stable isotope ratios of particulate carbon and particulate nitrogen, dissolved carbon dioxide, dissolved total inorganic carbon, and dissolved organic carbon. In addition, continuous lake surface and atmospheric CO2 data were collected in 2019 and 2021 on a Lake Michigan transect between Milwaukee, WI and Muskegon MI. The water chemistry and CTD data are provided in separate datasets.
Measurements were made with a CO2 monitoring system mounted on a high-speed ferry that crosses the lake 4 to 6 times daily between May and October. The monitoring system consists of a "wet" box which includes a peristaltic pump that draws water from the ship's sea chest and an equilibrator in which dissolved gases are equilibrated with a recirculating air flow. The air is pumped through a desiccant to remove moisture, after which it flows to a "dry" box where it passes through an infrared gas analyzer. A similar system, without the peristaltic pump or equilibrator, is mounted near the bow of the ship to record atmospheric CO2 concentration.
These chemical measurements have several applications, including: 1) Constructing an annual carbon and nutrient budget for the water column, which is used along with direct measurements of quagga mussel nutrient recycling to assess the role of invasive quagga mussels in the lake's carbon and nutrient cycles; 2) When combined with separate measurements of the vertical structure of water density and currents, to quantify vertical fluxes of dissolved nutrients and inorganic carbon, to determine how carbon and nutrient recycling by profundal quagga mussels may affect plankton production in the euphotic zone; 3) The calibration and validation of physical / biogeochemical models used to better understand how invasive quagga mussel have altered energy flow and nutrient dynamics in the Great Lakes, and guide management decisions with regard to nutrients and fish stocking.
false
Bootsma, H., Liao, Q. (2024) Continuous CO2 data from a Lake Michigan transect between Milwaukee, Wisconsin and Muskegon, Michigan collected during 2017, 2018, 2019, and 2021. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 3) Version Date 2023-12-20 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.737667.3 [access date]
true
3
10.26008/1912/bco-dmo.737667.3
false
carbon dioxide
Lake Michigan
Quagga mussel
Great Lakes
2023-12-20
Datapackage.json
Frictionless Data Package
https://www.bco-dmo.org/dataset/737667/datapackage.json
application/vnd.datapackage+json
PDF
https://www.bco-dmo.org/dataset/737667/Dataset_description.pdf
application/pdf
ISO 19115-2 (NOAA Profile)
https://www.bco-dmo.org/dataset/737667/iso
application/xml
http://www.isotc211.org/2005/gmd-noaa
Dublin Core
https://www.bco-dmo.org/dataset/737667/dublin-core
application/xml
http://purl.org/dc/elements/1.1/
737667
http://lod.bco-dmo.org/id/dataset/737667
2017-04-28 - 2021-10-28
2017-04-28
2017-04-28
---28
117
--04
2017
2021-10-28
2021-10-28
---28
300
--10
2021
OSPREY
http://www.opengis.net/def/crs/OGC/1.3/CRS84
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