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High-frequency water quality and air parameters from large lake Võrtsjärv, Estonia: 2010-2019

General Information
Data Package:
Local Identifier:edi.827.3
Title:High-frequency water quality and air parameters from large lake Võrtsjärv, Estonia: 2010-2019
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This high frequency water-air dataset was collected from large shallow Lake Võrtsjärv (Estonia) with an automated lake monitoring buoy system and was used in the analyses described in the manuscript by Thayne, M.W., B. Kraemer, J.P. Mesman, A. Laas, E. de Eyto, B. W. Ibelings, R. Adrian. “Trophic state effects on antecedent lake characteristics shape the resistance and resilience of lakes following extreme storms”. Dataset contains every 10-minute measurements from the open water periods in years 2010-2019. Underwater measurements were conducted with Yellow Springs Instrument multiparameter sonde model YSI 6600 V2-4. Underwater measurements contain the collected values of pH, dissolved oxygen, dissolved oxygen saturation, water temperature, specific conductance, water turbidity, chlorophyll concentration (calculated by the sensor from fluorescence values), and the abundance of the bluegreen algae (calculated by the sensor from phycocyanin fluorescence values). Air parameters were collected with the Vaisala multiparameter weather station model WXT520 and contain measurements of wind direction, wind speed, air temperature, atmospheric pressure, and cumulative amount of rain between measurement periods. All air measurements were collected 2 m above from the water surface. Additionally, solar irradiance measurements were collected from the automated buoy system with the Licor pyranometer model LI-200, those measurements contain values in two different columns: average solar irradiance in W/m2 and average photon flux density values in micromoles per square meter per second.

Publication Date:2022-04-01
For more information:
Visit: DOI PLACE HOLDER

Time Period
Begin:
2010-06-30
End:
2019-09-30

People and Organizations
Contact:Laas, Alo (Centre for Limnology, Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia) [  email ]
Creator:Laas, Alo (Centre for Limnology, Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia)

Data Entities
Data Table Name:
Solar irradiance
Description:
Collected solar irradiance data
Data Table Name:
Underwater measurements
Description:
Collected data of underwater parameters
Data Table Name:
Weather
Description:
Collected data of weather parameters
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/827/3/660ba6e68dab4b9a22fa4469ef42e522
Name:Solar irradiance
Description:Collected solar irradiance data
Number of Records:255904
Number of Columns:5

Table Structure
Object Name:Solar.csv
Size:13787461 bytes
Authentication:1404b483a6e9ef3dcf1470242e958c7f Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:Lake  
Date Time (GMT+3)  
height  
LicorAvg  
LicorFluxDensityAvg  
Definition:Name of the lakeDate and Time, summertime Estonia (GMT+3)Measurement height from water surfaceaverage solar irradianceaverage solar photon flux density
Storage Type:string  
date  
float  
float  
float  
Measurement Type:nominaldateTimeratioratioratio
Measurement Values Domain:
DefinitionName of the lake
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typenatural
Min2 
Max2 
UnitwattPerMeterSquared
Typereal
Min0 
Max1585.59 
UnitmicromolePerMeterSquaredPerSecond
Typereal
Min0 
Max3489.661993 
Missing Value Code:      
CodeNA
Explmissing value
CodeNA
Explmissing value
Accuracy Report:          
Accuracy Assessment:          
Coverage:          
Methods:          

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/827/3/0d00da753776706d90858b8925518c4a
Name:Underwater measurements
Description:Collected data of underwater parameters
Number of Records:209363
Number of Columns:11

Table Structure
Object Name:Water.csv
Size:16311069 bytes
Authentication:9b4a19ecbe32c2f5895c14110ceba4b7 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:Lake  
Date Time (GMT+3)  
depth  
pH  
DO  
DO%  
WTemp  
SpCond  
Turbidity  
Chlorophyl  
BGA PC  
Definition:Name of the lakeDate and Time, summertime Estonia (GMT+3)Measurement depth from water surfacedecimal logarithm of the reciprocal of the hydrogen ion activitydissolved oxygen concentrationdissolved oxygen saturationwater temperaturespecific conductanceturbidity of the waterchlorophyll concentration calculated by the sensor from fluorescence valuesabundance of the blue-green algae calculated by the sensor from phycocyanin fluorescence values (cellsPerMilliliter)
Storage Type:string  
date  
float  
float  
float  
float  
float  
float  
float  
float  
float  
Measurement Type:nominaldateTimeratioratioratioratioratioratioratioratioratio
Measurement Values Domain:
DefinitionName of the lake
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typenatural
Min1 
Max1 
Unitdimensionless
Typereal
Min6.78 
Max9.26 
UnitmilligramPerLiter
Typereal
Min4.19 
Max15.08 
Unitpercent
Typereal
Min45.5 
Max153.6 
Unitcelsius
Typereal
Min-0.02 
Max27.67 
UnitmillisiemensPerCentimeter
Typereal
Min0.24 
Max0.45 
UnitnephelometricTurbidityUnits
Typereal
Min0.2 
Max74.2 
UnitmicrogramPerLiter
Typereal
Min5.7 
Max36.6 
UnitnumberPerMilliliter
Typenatural
Min347 
Max38457 
Missing Value Code:      
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
Accuracy Report:                      
Accuracy Assessment:                      
Coverage:                      
Methods:                      

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/827/3/1441df6b1c10f910ccdc400e40b5fce9
Name:Weather
Description:Collected data of weather parameters
Number of Records:238696
Number of Columns:8

Table Structure
Object Name:Weather.csv
Size:14081378 bytes
Authentication:c5ea2729ba3e9448040441e430eed540 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:Lake  
Date Time (GMT+3)  
height  
WindDir  
WindSpeed  
AirTemp  
AirPres  
RainAmount  
Definition:Name of the lakeDate and Time, summertime Estonia (GMT+3)Measurement height from water surfaceaverage wind directionaverage wind speedaverage air temperatureaverage atmospheric pressurecumulative amount of precipitation between measurement periods
Storage Type:string  
date  
float  
float  
float  
float  
float  
float  
Measurement Type:nominaldateTimeratioratioratioratioratioratio
Measurement Values Domain:
DefinitionName of the lake
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typenatural
Min2 
Max2 
Unitdegree
Typewhole
Min0 
Max359 
UnitmeterPerSecond
Typereal
Min0 
Max24.4 
Unitcelsius
Typereal
Min-6.4 
Max33.4 
Unitpascal
Typereal
Min727.1 
Max777.3 
Unitmillimeter
Typereal
Min0 
Max11.72 
Missing Value Code:      
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
CodeNA
Explmissing value
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)high frequency measurements, pH, phycocyanin, solar irradiance, Lake Võrtsjärv, Centre for Limnology, Estonia
LTER Controlled Vocabularydissolved oxygen, water temperature, specific conductance, turbidity, chlorophyll, wind direction, wind speed, air temperature, atmospheric pressure, precipitation

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:

Lake Võrtsjärv was equipped with a high frequency monitoring platform. Continuous monitoring of pH, dissolved oxygen, dissolved oxygen saturation, water temperature, water specific conductance, water turbidity, chlorophyll fluorescence, phycocyanin fluorescence were conducted with a multiparametric sonde (Yellow Springs Instruments (YSI) 6600 V2–4) at one-meter depth. All sensors used for underwater measurements were calibrated according to the manufacturer instructions at least once per month. Air parameters (wind direction, wind speed, air temperature, atmospheric pressure, and precipitation) were collected with the Vaisala multiparameter weather station (WXT520) at 2 meters above the lake water surface. Solar irradiance measurements were collected with the Licor pyranometer (model LI-200) also 2 meters above the lake water surface.

According to the YSI multiparametric YSI 6600 V2-4 sonde manual the accuracy and the resolution of measured parameters are:

pH

accuracy +/- 0.2 units

resolution = 0.01units

do %

accuracy +/- 2%

resolution = 0.1%

do mg/L

accuracy +/- 2% or 0.2mg/L

resolution = 0.01mg/L

temperature

accuracy +/- 0.15 C

resolution = 0.01C

specific conductance

accuracy ±0.5% of reading plus 0.001 mS/cm

resolution = 0.001 to 0.1 mS/cm (range dependent)

turbidity

accuracy +/- 5%

resolution = 0.1 NTU

chlorophyll fluorescence

range: 0-200 microgram/L as chlorophyll, 0-100% as fluorescence

resolution = 0.1 microgram/L Chl; 0.1% FS

phycocyanin fluorescence

linearity: R2 = 0.9999 (Relative to Serial Dilution of Rhodamine WT)

detection Limit: 150 cells/mL

wind direction

accuracy +/- 1 degree

resolution = 1 degree

wind speed

accuracy +/- 0.3m/s or +/- 3%

resolution = 0.1 m/s

air temperature

accuracy +/- 0.3 degree of Celsius

resolution = 0.1 degree of Celsius

air pressure

accuracy +/- 0.5 hPa

resolution = 0.1 hPa

precipitation

resolution = 0.1 mm

global irradiance

accuracy <0.5% (0.5…1330 Wm-2)

resolution < 1Wm-2

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Alo Laas
Organization:Centre for Limnology, Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
Email Address:
Alo.Laas@emu.ee
Id:https://orcid.org/0000-0002-4801-0377
Contacts:
Individual: Alo Laas
Organization:Centre for Limnology, Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
Email Address:
Alo.Laas@emu.ee
Id:https://orcid.org/0000-0002-4801-0377

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
2010-06-30
End:
2019-09-30
Geographic Region:
Description:Lake Võrtsjärv, Estonia
Bounding Coordinates:
Northern:  58.410024Southern:  58.095527
Western:  25.895050Eastern:  26.172455

Project

Parent Project Information:

Title:Lake food webs and C metabolism across gradients of catchment alkalinity and climate
Personnel:
Individual: Tiina Nõges
Id:https://orcid.org/0000-0002-4558-7373
Role:Principal Investigator
Funding: Estonian Ministry of Education and Research IUT21-2
Related Project:
Title:Modelling lake carbon fluxes from high-frequency gas exchange measurements
Personnel:
Individual: Alo Laas
Organization:Centre for Limnology, Chair of Hydrobiology and Fishery, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
Email Address:
Alo.Laas@emu.ee
Id:https://orcid.org/0000-0002-4801-0377
Role:Principal Investigator
Funding: Estonian Research Council PSG32

Maintenance

Maintenance:
Description:ongoing
Frequency:
Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'millisiemensPerCentimeter'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.001'
        |     |     |     |  \___attribute 'name' = 'millisiemensPerCentimeter'
        |     |     |     |  \___attribute 'parentSI' = 'siemensPerCentimeter'
        |     |     |     |  \___attribute 'unitType' = 'specific conductivity'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'millisiemens per centimeter'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'nephelometricTurbidityUnits'
        |     |     |     |  \___attribute 'multiplierToSI' = ''
        |     |     |     |  \___attribute 'name' = 'nephelometricTurbidityUnits'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = 'turbidity'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'nephelometric turbidity unit'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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