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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 

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.


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 Portal
Dataset ID:2010_MAT_SoilThawTemp_lg.03
Dataset Title:2010 thaw depth and soil temperature in LTER moist acidic tundra experimental plots
Investigator 1: 
First Name:Laura
Last Name:Gough
Organization:Department of Biology
Address line 2:Box 19498
Address line 3:University of Texas at Arlington
Zip Code:76019
Investigator 2: 
First Name:Jennie
Last Name:McLaren
Address line 2:
Address line 3:
Zip Code:
Associate Investigators:
Keywords:thaw depth, soil temperature, Toolik, moist acidic tundra
Abstract:In 2010, thaw depth and soil temperature were measured throughout the growing season in control and fertilized plots in the Arctic LTER's moist acidic tundra sites.
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
Online URL:
Data File URL
Data File Name 2010_MAT_SoilThawTemp_lg.csv
Beginning Date 6/4/2010
End Date 9/1/2010
Number of Data Records 462
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Metadata and data entered (LG); formated for online etc. (JD-Dec2013)
Version 2: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 11Feb14
Version 3: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015
Location Name LTER Moist Acidic Tussock Tundra Select Site or enter New One  
Geographic Description Arctic LTER Experimental Plots: Moist Acidic Tussock Tundra (MAT) Northeast corner block 1 near Toolik Field Station, North Slope, Alaska. Enter Description  
Location Bounding Box      
West Bounding Coordinate      
East Bounding Coordinate      
North Bounding Coordinate      
South Bounding Coordinate      
OR if single point location      
Latitude 68.624411 In Decimal Degrees  
Longitude -149.609589 In Decimal Degrees  
Elevation 750 In Meters  
Link to Google Map View on Google Map    
Organisms studied
Methods: The LTER moist acidic tussock (Toolik MAT) site was set up in 1989. The experimental design is four blocks of 5 x 20 meter plots with randomly assigned treatments within each block. Treatments include control (CT), nitrogen (N), phosphorus (P) and nitrogen plus phosphorus (NP). Fertilizer is added annually following snowmelt in June as 10 g/m2 nitrogen (as NH4NO3) and 5 g/m2 phosphorous (as triple superphosphate). Exclosure plots were set up at the MAT site in July 1996 on extra 5 x 20 meter plots within the four-block design of the 1989 LTER acidic tussock experimental plots. On each plot a 5 x 10 meter section was fenced with large mesh (4-inch square mesh) and within this fence a 5x5-meter plot was fenced with a small mesh (1/2-inch square mesh). In each block two fenced plots were setup: a plot with no fertilizer and a plot with annual fertilization treatments as described above. Thus the treatments created are no fence, no fertilizer (NFCT); small mesh fence, no fertilizer (SFCT); large mesh fence, no fertilizer (LFCT); no fence, N plus P (NFNP); small mesh fence, N plus P (SFNP); and large mesh fence, N plus P (LFNP). In 2006, a new set of experimental treatments were established in MAT near the earlier plots described above. These include a gradient of fertilization treatments that receive nitrate or ammonium alone, or receive N and P additions with 0.5, 1, 2, 5, or 10 g N added with half of that amount added as P. Only Blocks 1-3 of the 2006 plots were sampled.

For this dataset, only the CT and NP plots were sampled in each of the three sets of experiments (set up in 1989, 1996, and 2006). The 1996 NP plots are the NFNP plots described above, and the 2006 NP plots are the 10gN plots (F10) described above.

Calculations: none

Sampling Description.

On each sampling date, a metal thaw depth probe with centimeter increments was inserted in 3-5 random locations within each plot. Once the probe hit permafrost, the value for depth of thaw was recorded. Immediately adjacent to this sampling, a hand-held soil thermometer was inserted to a depth of 5 cm and the temperature was recorded. If thaw exceeded 10 cm, a second soil temperature measurement was made at 10 cm depth.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Date The date of measurement. datetime   dd-mmm-yyyy    
Site The site of measurement text        
Treatment start year The year the treatment began datetime   yyyy    
Block The treatment block number text        
Treatment The treatment imposed text        
ThawDepth1 depth to permafrost number centimeter      
SoilTemp1_5cm temperature at 5 cm depth number celsius     .=Missing or Not Measured
SoilTemp1_10cm temperature at 10 cm depth number celsius     .=Missing or Not Measured
ThawDepth2 depth to permafrost number centimeter     .=Missing or Not Measured
SoilTemp2_5cm temperature at 5 cm depth number celsius     .=Missing or Not Measured
SoilTemp2_10cm temperature at 10 cm depth number celsius     .=Missing or Not Measured
ThawDepth3 depth to permafrost number centimeter     .=Missing or Not Measured
SoilTemp3_5cm temperature at 5 cm depth number celsius     .=Missing or Not Measured
SoilTemp3_10cm temperature at 10 cm depth number celsius     .=Missing or Not Measured
ThawDepth4 depth to permafrost number centimeter     .=Missing or Not Measured
SoilTemp4_5cm temperature at 5 cm depth number celsius     .=Missing or Not Measured
SoilTemp4_10cm temperature at 10 cm depth number celsius     .=Missing or Not Measured
ThawDepth5 depth to permafrost number centimeter     .=Missing or Not Measured
SoilTemp5_5cm temperature at 5 cm depth number celsius     .=Missing or Not Measured
SoilTemp5_10cm temperature at 10 cm depth number celsius     .=Missing or Not Measured

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