Data Package Metadata View Summary

Geochemical data from Little Comfort and Keewahtin Lakes, Minnesota 2023-2024.

General Information

Data Package:

Local Identifier:

edi.1633.3

Title:

Geochemical data from Little Comfort and Keewahtin Lakes, Minnesota 2023-2024.

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Depth profiles of water column chemical and physical properties were assessed with seasonal-scale frequency from Little Comfort from September 2023 to June 2024 and from Keewahtin Lake in September 2023. The data were collected to assess mixing status, major geochemical constituents within the lake, and mineral precipitation reactions. Several parameters were routinely measured with deployable probes at meter or sub-meter resolution at the deepest location in each lake. Water samples were also collected for laboratory analysis.

Publication Date:

2024-10-21

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2023-09-02

End:

2024-04-06

People and Organizations
Contact:	Swanner, Elizabeth (Iowa State University, Professor) [ email ]
Creator:	Swanner, Elizabeth D (Iowa State University, Professor)
Creator:	Alfaro Garcia, Mariela N (Iowa State University)
Creator:	Barton, Nicholas W (Iowa State University)
Creator:	Bohnsack, Anna R (Iowa State University)
Creator:	Conwell, Tanner L (Iowa State University)
Creator:	Getz, Thomas A (Iowa State University)
Creator:	Korkowski, Garrett A (Iowa State University)
Creator:	Nong, Zoe M (Iowa State University)
Creator:	Quick, R Gail (Iowa State University)
Creator:	Schuller, Sydney KR (Iowa State University)
Creator:	Slaven, Stacy L (Iowa State University)
Creator:	Zechmeister, Kayleigh E (Iowa State University)

Data Entities
Data Table Name:	Little_Comfort_Keewahtin_data
Description:	table of water column data collected from Little Comfort and Keewahtin Lakes

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1633/3/1435c68115aac992200fe64faae68475
Name:	Little_Comfort_Keewahtin_data
Description:	table of water column data collected from Little Comfort and Keewahtin Lakes
Number of Records:	4103
Number of Columns:	11

Table Structure

Object Name:

CLFLWD_EDI_v2.csv

Size:

456770 byte

Authentication:

2a5e121d6f6bccf944656f5a1bf6989f Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Lake

Date

Collector

Depth

Device

Measurement

Value

Units

Duplicate is field duplicate

Flag

Column Name:

Lake

Date

Collector

Depth

Device

Measurement

Value

Units

Comment

Flag

Definition:

Lake

Year (20XX), Month (01-12), Day of month (01-31)

First and last name of Investigator who collected data

Vertical depth from surface at the point of collection in the lake

Name of sensor or analytical instrument

Parameter being measured

Numerical value

Unit of measure

Observations related to sample collection or information related to analysis

Samples that were outside of stated detection limits. Detection limits are described in the methods and QC column.

Quality Control criteria

Storage Type:

string

dateTime

string

float

string

float

string

Measurement Type:

nominal

dateTime

nominal

ratio

nominal

ratio

nominal

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Keewahtin Lake
Definition	Keewahtin Lake
Source

Code Definition

Code	Little Comfort Lake
Definition	Little Comfort Lake
Source

Format	YYYY-MM-DD
Precision

Definition

text

Unit	meter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	BBE Fluoroprobe
Definition	BBE Moldaenke Fluoroprobe
Source

Code Definition

Code	Dionex ICS-5000+
Definition	Dionex ICS-5000+ Ion Chromatograph
Source

Code Definition

Code	Hach Iron and Manganese Test Kit
Definition	Hach Iron and Manganese Test Kit
Source

Code Definition

Code	Hach TNT plus 830
Definition	Hach TNT plus 830 used on Hach DR 1900 Spectrophotometer
Source

Code Definition

Code	Hach TNT plus 858
Definition	Hach TNT plus 858 used on Hach DR 1900 Spectrophotometer
Source

Code Definition

Code	Hach TNT plus 861
Definition	Hach TNT plus 861 used on Hach DR 1900 Spectrophotometer
Source

Code Definition

Code	Hach TNT plus 870
Definition	Hach TNT plus 870 used on Hach DR 1900 Spectrophotometer
Source

Code Definition

Code	LiCOR Li-193
Definition	LiCOR Li-193 spherical underwater quantum sensor
Source

Code Definition

Code	Picarro L1102-i
Definition	Picarro L1102-i Water Analyzer (isotopes)
Source

Code Definition

Code	Seal Analytical AQ2 method EPA-111-A Rev.8
Definition	Seal Analytical AQ2 method EPA-111-A Rev.8
Source

Code Definition

Code	Seal Analytical AQ2 method EPA-135-A Rev.5
Definition	Seal Analytical AQ2 method EPA-135-A Rev.5
Source

Code Definition

Code	Secchi Disk
Definition	Secchi Disk
Source

Code Definition

Code	YSI ProDSS
Definition	YSI ProDSS used with sensors defined in Measurement
Source

Definition

text

Unit	dimensionless
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	degreesCelsius
Definition	temperature in degrees Celsius
Source

Code Definition

Code	digits
Definition	digits of LED
Source

Code Definition

Code	meters
Definition	meters
Source

Code Definition

Code	microgramsPerLiter
Definition	micrograms per liter
Source

Code Definition

Code	micromolesPerSquareMeterPerSecond
Definition	micromoles photons per square meter per second
Source

Code Definition

Code	microSiemensPerCentimeter
Definition	microSiements per centimeter
Source

Code Definition

Code	milligramsPerLiter
Definition	milligrams per liter
Source

Code Definition

Code	milliVolts
Definition	milli Volts
Source

Code Definition

Code	permil
Definition	permil
Source

Code Definition

Code	pH
Definition	pH
Source

Code Definition

Code	relativeFlorescenseUnits
Definition	relative Fluorescence units
Source

Definition

text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	ADL
Definition	at detection limit at top of method range
Source

Code Definition

Code	BDL
Definition	below detection limit
Source

Code Definition

Code	BDL
Definition	below detection limit
Source

Definition

text

Missing Value Code:

Code	-99999
Expl	data was not collected

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
(No thesaurus)	mineral
LTER Controlled Vocabulary	biogeochemical processes, water properties, iron, phosphorus

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Study Site:

Little Comfort Lake lies 3 miles northeast of Forest Lake, Minnesota along US Highway 8 and is monitored by the Comfort Lake Forest Lake Watershed Distract (https://www.clflwd.org/). The lake has a calculated total volume of 26000 m3 and total surface area of 21860 m2. The deepest point within the lake is 16 m. Little Comfort Lake is connected to Comfort Lake by culvert underneath US Highway 8. It is surrounded by residential property on all sides not bordering the highway and is used for recreational purposes only.

Keewahtin Lake is just south of Highway 97, southwest of Forest Lake in Forest Lake, Minnesota. The lake is monitored by the Comfort Lake Forest Lake Watershed Distract (https://www.clflwd.org/). It has a maximum depth of 10.4 m.

Description:

Sensors:

A Yellow Springs Instruments (YSI) ProDSS was used to acquire water column chemical and physical parameters. These parameters and their units as defined in the dataset are temperature (degreeCelsius), depth (meters), specific conductance (microSiemensPerCentimeter), pH (pH), dissolved oxygen (milligramsPerLiter), oxidation-reduction potential (milliVolts), Chlorophyll a (microgramsPerLiter), and phycocyanin (microgramsPerLiter). Depth was determined through an integrated pressure transducers for the ProDSS. Calibrations for specific conductance used two-point calibration buffers obtained from the manufacturers. Membrane-based and optical dissolved oxygen sensors were calibrated using a single point calibration with 100% air-saturated water and/or a two-point calibration with sodium dithionite as 0%. The pH sensors were calibrated using buffers at pH 4, 7, and 10. The resolution of sensors is given in the QC column for temperature, depth, dissolved oxygen, specific conductance, oxidation-reduction potential, pH, and turbidity. Low range is given for chlorophyll and phycocyanin.

Photosynthetically active radiation (PAR) was quantified using an underwater spherical quantum sensor (Li-193; 7 μA per 1,000 μmoles quanta m-2 s-1) coupled to an Li-250A light meter and deployed on a 2009S lowering frame (Li-COR). All measurements were taken near mid-day. Measurements in air are denoted as depth of -1 m. Secchi disk readings were made to the nearest 5 centimeters and are reported with the Secchi Disk Depth in both the depth and value columns.

A BBE Moldaenke Fluoroprobe was used to determine taxon specific chlorophyll fluorescence [Chlorophyta, Cyanobacteria, diatoms (& dinoflagellates), and Cryptophya]. The range of chlorophyll is 0-500 microgramsPerLiter with a resolution of 0.01 microgramsPerLiter. A “yellow substances” or dissolved organic carbon correction is automatically applied.

Description:

Chemical measurements:

Analytical precision was monitored through laboratory replicates. Replicated analyses are noted in the Comments column of the dataset.

Water samples for laboratory-based measurements of dissolved and gaseous chemical species and were collected with a Mini Monsoon pump with low-flow controller (Proactive) attached to vinyl tubing and a cable marked with meter and half-meter depth increments. Water was filtered in-line through a 0.45 micron PES syringe filter affixed to a polycarbonate luer lock valve attached to the tubing.

Samples for total alkalinity were filtered and stored at 4°C with no headspace. They were measured within 12 hours at room temperature using Hach TNT870 vials and a Hach DR 1900 spectrophotometer. This method has a range of 25 to 400 milliGramsPerLiter, which is reported in the QC column. Samples that were over this range were diluted with ultrapure water and analyzed again.

Samples for sulfide were filtered and stored at 4°C with no headspace. They were measured within 12 hours at room temperature using Hach TNT861 vials and a Hach DR 1900 spectrophotometer. This method has a range of 0.1 to 2 milliGramsPerLiter, and these values are reported in the QC column. All samples were below range.

Samples for ammonium were filtered and stored at 4°C with no headspace. They were measured within 12 hours at room temperature using Hach TNT830 vials and a Hach DR 1900 spectrophotometer. This method has a range of 0.015 to 2 milliGramsPerLiter, and these values are reported in the QC column. Samples that were over this range were diluted with ultrapure water and analyzed again.

Dissolved iron measurements were made using Hach TNT858 vials and a Hach DR 1900 spectrophotometer in September 2023. This method has a range of 0.2 to 6 milliGramsPerLiter and is noted in the QC column. Samples were filtered and kept at 4°C until analysis within 12 hours. In October 2023 and February and April 2024 dissolved iron and manganese were measured with a Hach Iron and Manganese Test Kit. This method has a range of 0 to 4 milliGramsPerLiter, and these values are reported in the QC column. Samples that were over this range were diluted with ultrapure water and analyzed again.

Ion Chromatography (IC) was performed on samples filtered through 0.45 μm PES filters and kept at 4°C until analysis. The samples were analyzed by Ion Chromanalytical (St. Paul, Minnesota). Anions analyzed were fluoride (Fl-), chloride (Cl-), nitrite (NO2-), nitrate (NO3-), bromide (Br-), sulfate (SO42-), thiosulfate (S2O32-), phosphate (PO43-), acetate and formate. Cations analyzed were ammonium, calcium, lithium, magnesium, potassium, sodium, and strontium. The detection limits are given in the QC column.

Dissolved cations were first filtered through a 0.45 μm PES filter. Both dissolved and total (unfiltered) samples were acidified with nitric acid to a final concentration of 1% and stored at 4°C until analysis. In 2006-2009 samples were analyzed by the University of Minnesota Department of Earth Sciences (iCap 7600 Duo) with an analytical precision of 2% or lower.

Samples for water isotopes (δ2H-H2O and δ18O-H2O) were filtered and filled into containers with no headspace and kept at 4 °C until analyses. These samples were analyzed by a Picarro L1102-i Isotopic Liquid Water Analyzer in the Stable Isotope Laboratory at Iowa State University. The combined uncertainty (analytical uncertainty and average correction factor) for each analysis is provided in the QC column.

Samples were analyzed for total Kjeldahl nitrogen and phosphorus, using a Seal Analytical AQ2 Autoanalyzer in the Water Quality Research Laboratory (WQRL). The WQRL is in the department of Agriculture and Biological Engineering at Iowa State University. Samples for total Kjeldahl nitrogen and phosphorus were acidified to pH <2 with 5N H2SO4 and refrigerated until analysis within 28 days. The method detection limits are given in the QC column. Method ranges are: total Kjeldahl nitrogen (0.2-4.0 milligramsNitrogenPerLiter), total Kjeldahl phosphorus (0.04-3.2 milligramsPhosphorusPerLiter).

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Professor Elizabeth D Swanner

Organization:

Iowa State University

Position:

Professor

Address:

2237 Osborn Drive,

253 Science I,

Ames, IA 50011 US

Phone:

5157081254 (voice)

Email Address:

eswanner@iastate.edu

Web Address:

https://geobiochem.ge-at.iastate.edu/

Id:

https://orcid.org/0000-0001-9507-0893

Individual:

Mariela N Alfaro Garcia

Organization:

Iowa State University

Email Address:

marielaa@iastate.edu

Individual:

Nicholas W Barton

Organization:

Iowa State University

Email Address:

nbarton@iastate.edu

Individual:

Anna R Bohnsack

Organization:

Iowa State University

Email Address:

annabohn@iastate.edu

Individual:

Tanner L Conwell

Organization:

Iowa State University

Email Address:

tconwell@iastate.edu

Individual:

Thomas A Getz

Organization:

Iowa State University

Email Address:

tagetz@iastate.edu

Individual:

Garrett A Korkowski

Organization:

Iowa State University

Email Address:

gkorkow@iastate.edu

Individual:

Zoe M Nong

Organization:

Iowa State University

Email Address:

zmnong@iastate.edu

Individual:

R Gail Quick

Organization:

Iowa State University

Email Address:

rgquick@iastate.edu

Individual:

Sydney KR Schuller

Organization:

Iowa State University

Email Address:

sydney2@iastate.edu

Individual:

Stacy L Slaven

Organization:

Iowa State University

Email Address:

slslaven@iastate.edu

Individual:

Kayleigh E Zechmeister

Organization:

Iowa State University

Email Address:

zechmeik@iastate.edu

Contacts:

Individual:

Professor Elizabeth Swanner

Organization:

Iowa State University

Position:

Professor

Address:

2237 Osborn Drive,

253 Science I,

Ames, IA 50011 US

Phone:

5157081254 (voice)

Email Address:

eswanner@iastate.edu

Web Address:

https://geobiochem.ge-at.iastate.edu/

Id:

https://orcid.org/0000-0001-9507-0893

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2023-09-02

End:

2024-04-06

Geographic Region:

Description:

Little Comfort Lake

Bounding Coordinates:

Northern:	45.314475	Southern:	45.310747
Western:	-92.939925	Eastern:	-92.932783

Geographic Region:

Description:

Keewahtin Lake

Bounding Coordinates:

Northern:	45.253161	Southern:	45.244556
Western:	-92.904133	Eastern:	-92.892622

Project

Parent Project Information:

Title:

Quantifying the extent and biogeochemical impact of modern ferruginous lakes

Personnel:

Individual:

Professor Elizabeth D Swanner

Organization:

Iowa State University

Position:

Professor

Address:

2237 Osborn Drive,

253 Science I,

Ames, IA 50011 US

Phone:

5157081254 (voice)

Email Address:

eswanner@iastate.edu

Web Address:

https://geobiochem.ge-at.iastate.edu

Id:

https://orcid.org/0000-0001-9507-0893

Role:

Principal Investigator

Additional Award Information:

Funder:	National Science Foundation
Number:	1944946
Title:	CAREER: Quantifying the extent and biogeochemical impact of modern ferruginous lakes

Maintenance

Maintenance:

Description:	This dataset will be maintained as more data is collected or if any revisions to the data are needed.
Frequency:	asNeeded

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n      '
        |___element 'metadata'
        |     |___text '\n         '
        |     |___element 'emlEditor'
        |     |        \___attribute 'app' = 'ezEML'
        |     |        \___attribute 'release' = '2024.10.09'
        |     |___text '\n      '
        |___text '\n   '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Geochemical data from Little Comfort and Keewahtin Lakes, Minnesota 2023-2024.

Data Entities

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Geochemical data from Little Comfort and Keewahtin Lakes, Minnesota 2023-2024.

+/- Data Entities

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata