Arctic LTER Database

Conditions of Use

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:

Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml 

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.

Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data, Dataset via LTER Data Poral
Dataset ID:ArcticLTER_Lakes_Toolik_JulyEpiCond.04
Dataset Title:Average Epilimnetic Conductivity from 1992 to present in Tooli Lake, Arctic LTER, Alaska.
Investigator 1: 
First Name:Anne
Last Name:Giblin
Organization:Marine Biological Laboratory
Address line 2:Ecosystems Center
Address line 3:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:United States of America
Investigator 2: 
First Name:Christopher
Last Name:Luecke
Organization:Utah State University
Address line 2:Department of Watershed Science
Address line 3:
City:Logan
State:UT
Zip Code:84322-5210
Country:United States of America
Investigator 3: 
First Name:George
Last Name:Kling
Organization:University of Michigan
Address line 2:Department of Ecology and Evolutionary Biology
City:Ann Arbor
State:MI
Zip Code:48109-1048
Country:United States of America
Investigator 4: 
First Name:Dan
Last Name:White
Organization:Marine Biological Laboratory
Address line 2:Ecosystems Center
Address line 3:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:United States of America
Associate Investigators:
Keywords:chemistry, conductivity, aquatic ecosystems, arctic, freshwater, lakes, limnology, specific conductivity, epilimnion, inorganic nutrients, arctic lakes
Abstract:Average conductivity of the epilimnion (0-3m of water depth) found in Toolik Lake during the month of July.
For questions about the Metadata and data contact the Investigators.
For information about this web site contact:
Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10093&urlTail=lakes/physchem/data/ArcticLTER_Lakes_Toolik_JulyEpiCond.csv
Data File Name ArcticLTER_Lakes_Toolik_JulyEpiCond.02
Beginning Date July, 1992
End Date July, 2009
Number of Data Records 534
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: added data from 1992-2000
For version .02 data back to 1977 was added, added in conductivity data at depth and daily average, added depth and temperature data, "Sheet 1" was left attached as a yearly summary
Version 3: Updated metadata to newer form (with sites sheet). CH April 2013.
Version 4: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
 
RESEARCH LOCATION:                                            
Location Name Toolik Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One  
Geographic Description Toolik Lake, Main Station Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description  
Location Bounding Box                                            
West Bounding Coordinate                                            
East Bounding Coordinate                                            
North Bounding Coordinate                                            
South Bounding Coordinate                                            
OR if single point location                                            
Latitude 68.63293 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.60407 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 719 In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map                                          
                                             
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:For Data from 2007 thru 2009 measurements were taken with a DS5 Hydrolab Datasonde. Depth reading on sonde was calibrated in the field so that a depth of 0m was the water surface. For profiles, measurements were taken at surface (~0m) then at 1m intervals until bottom. Measurements were recorded on a Surveyor 4 Datalogger.
For Data from 2001 thru 2006 measurements were taken with a DS4a Hydrolab Datasonde. Depth reading on sonde was calibrated in the field so that a depth of 0m was the water surface. For profiles, measurements were taken at surface (~0m) then at 1m intervals until bottom. Measurements were recorded on a Surveyor 4 Datalogger.
For Data from 1993 thru 2000 measurements were taken with a Hydrolab H20-BT STd multiprobe. For profiles, measurements were taken at surface (~0m) then at 1m intervals until bottom. Measurements were recorded on a Surveyor 3 Datalogger.
For Data from 1977 thru 1992 measurements were taken with a YSI model 33 conductivity meter. For profiles, measurements were taken at surface (~0m) then at 1m intervals until bottom.

Daily average specific conductance of the epilimnion was calculated as the mean of all conductivity measurements from the water's surface to three meters of depth on a particular day.

Yearly average specific conductance of the epilimnion was calculated as the mean of all daily average specific conductance of the epilmnion values.

The "Sheet 1" worksheet contains a summary of yearly average specific conductance of the epilimnion values from the "Julyepi" worksheet.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Site Name: Name of the lake where measurements were taken. There are discrete sampling sites defined by water depth, generally they are at the point of maximum depth. text        
Date Date readings were taken on. datetime   dd-mmm-yyyy    
Dep_m Depth of water measurement taken at starting from the surface as 0. number meter     .=Missing or Not Measured
Temp_C Water temperature at depth. number celsius     .=Missing or Not Measured
Cond_uS Specific conductivity of the water at depth corrected to 25C. number microsiemenPerCentimeter     .=Missing or Not Measured
Daily_Avg_Cond_uS Daily average specific conductivity of the epilimnion (0-3m of depth) corrected to 25C. number microsiemenPerCentimeter     .=Missing or Not Measured
Yearly_Avg_Cond_uS Yearly average specific conductivity of the epilimnion (0-3m of depth) corrected to 25C. number microsiemenPerCentimeter     .=Missing or Not Measured