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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:2007-2012_Oksrukuyik_DOC.02
Dataset Title:Dissolved Organic Carbon for Oksrukuyik Creek during the summer 2007-2012.
Investigator 1: 
First Name:Breck
Last Name:Bowden
Organization:University of Vermont
Address line 2:303D Aiken Center
Address line 3:Rubenstein School of Environment and Natural Resources
City:Burlington
State:Vermont
Zip Code:05405
Country:USA
Investigator 2: 
First Name:Bruce
Last Name:Peterson
Organization:Marine Biological Laboratory
Address line 2:7 MBL St.
Address line 3:The Ecosystems Center
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 3: 
First Name:Linda
Last Name:Deegan
Organization:Marine Biological Laboratory
Address line 2:7 MBL St.
Address line 3:The Ecosystems Center
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 4: 
First Name:Alex
Last Name:Huryn
Organization:University of Alabama
Address line 2:
Address line 3:
City:Tuscaloosa
State:AL
Zip Code:
Country:USA
Investigator 5: 
First Name:Elissa
Last Name:Schuett
Organization:University of Vermont
City:Burlington
State:Vermont
Country:USA
Associate Investigators:
Keywords:dissolved organic carbon, Oksrukuyik Creek, organic matter, streams, arctic streams
Abstract:Samples from designated stations from the Oksrukuyik were collected during each summer from 1989 to current time. Phosphorus addition has occurred from 1991 to 1996; station sites are relative distance from the original 1991 dripper. Phosphoric acid was added to the stream to increase soluble reactive phosphorus by 0.32 uM. From 1993 to 1996, Ammonium Sulfate was added along with the Phosphoric Acid. This addition of Ammonium Sulfate was added to the stream to increase N by 7.1 uM. From 1997 to present, the historic fertilized reach has been in recovery. Dissolved Organic Carbon has been analyzed on the Oksrukuyik Creek since 2007.
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.10324&urlTail=streams/stream_chemistry/data/2007-2012_Oksrukuyik_DOC.csv
Data File Name 2007-2012_Oksrukuyik_DOC
Beginning Date 6/22/2007
End Date 8/6/2012
Number of Data Records 60
Other Files to Reference
Availability Status 1
Quality Control Information field replicates and lab replicates of samples as well as quality assurance of data
Maintenance Description ongoing data collection, updated annually
Log of Changes: 4/2012: JPB organized metadata and data into this file.
Version 2: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 15Jan14; 1/2014: JPB added 2011+2012 data.
 
RESEARCH LOCATION:        
Location Name Oksrukuyik -0.1k Oksrukuyik -0.3k Oksrukuyik -0.7k  
Geographic Description Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach. Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach. Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach.  
Location Bounding Box        
West Bounding Coordinate        
East Bounding Coordinate        
North Bounding Coordinate        
South Bounding Coordinate        
OR if single point location        
Latitude 68.671486222 68.671371694 68.67101801  
Longitude -149.1281271 -149.131155484 -149.137892686  
Elevation 761.756 763.881 764.537  
Link to Google Map View on Google Map View on Google Map View on Google Map  
         
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:Water samples were collected at designated stations along the Oksrukuyik Creek.

Water was filtered through a 25mm GF/F filter in the field; samples were preserved with 100 uL/60mL 6N hydrochloric acid and transported to the Rubenstein Ecosystem Laboratory at the University of Vermont in Burlington, Vermont for future analysis on a Shimadzu TOC instrument as described in the methods listed in the LTER database protocols. See current protocols at http://ecosystems.mbl.edu/ARC
Samples collected were analyzed in the winter after the field season, all were acidified with 6N HCl and stored at 4oC.
Sample analysis of DOC on the Oksrukuyik Creek started in 2007.

2007-2010: Samples analyzed at the MBL in Woods Hole, MA.
2011-present: Samples analyzed at the Rubenstein Ecosystem Laboratory at the University of Vermont in Burlington, Vermont.

The TOC-L uses carrier gas, which is used to supply oxygen at 150mL/min to the combustion tube filled with oxidation catalyst. This tube is heated to 680 degrees C and samples are burned in the combustion tube to form carbon dioxide. The carrier gas, containing the carbon dioxide created from the combustion, flows into a dehumidifier, where it is cooled and dehydrated. The gas then goes through a halogen scrubber before it reaches the cell of a non-dispersive infrared NDIR gas analyzer. This analyzer detects the carbon dioxide, and the analog detection signal of the NDIR forms a peak. The area of this peak is measured by a data processor, and the peak’s area is proportional to the concentration of the TC in the sample.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Code LTER site code text        
River site of measurement (named) text        
Date Date of collection datetime   dd-mmm-yy    
Station (km) Distance from original N and P dripper, in kilometers. Negative numbers indicate sites upstream from fertilization, postive numbers are downstream. text        
uM_DOC Dissolved organic carbon number micromolePerLiter     -1111=no data | -9999=below detection limit

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.