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 

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:2008-2014ARF_ThawDepths.05
Dataset Title:Anatuvuk River fire scar thaw depth measurements during the 2008 to 2014 growing season
Investigator 1: 
First Name:Adrian
Last Name:Rocha
Organization:University of Notre Dame
Address line 2:Department of Biological Sciences
Address line 3:100 Galvin Life Sciences Center
City:Notre Dame
Zip Code:46556
Investigator 2: 
First Name:Gus
Last Name:Shaver
Organization:The Ecosystem Center, MBL
Address line 2:7 MBL St.
Address line 3:
City:Woods Hole
Zip Code:02543
Investigator 3: 
First Name:James
Last Name:Laundre
Organization:The Ecosystem Center, MBL
Address line 2:7 MBL St.
City:Woods Hole
Zip Code:02543
Associate Investigators:
Keywords:Anaktuvuk River fire, burns, thaw depth, permafrost, disturbance
Abstract:The Anaktuvuk River Fire occurred in 2007 on the North Slope of Alaska. In 2008, three eddy covariance towers were established at sites represent ing unburned tundra, moderately burned tundra, and severely burned tundra. Several times during the 2008-2014 growing seasons, thaw depth was measured at approximately 70 points near each of these towers . Data presented here are the individual measurements for each site and date.
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 2008-2014ARF_ThawDepths.csv
Beginning Date 6/22/2008
End Date 9/1/2014
Number of Data Records 3320
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description Data collection is ongoing. Data collection and processing through 2014 is complete.
Log of Changes: In previous document June 20, 2010 was entered twice where the first instance should have been Aug 27, 2009
Version 2: Updated to newer metadata form (with sites sheet). CH March 2013.
Version 3: Updated to include 2011 and 2012. April 2013
Version 4: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 15Jan14
Version 5: Added the 2013 and 2014 data. AR and BK.
Location Name Unburned flux tower Moderate burn flux tower Severe burn flux Tower  
Geographic Description Anaktuvuk River Fire - Unburned flux tower Anaktuvuk River Fire - Moderate burn flux tower Anaktuvuk River Fire - Severe burn flux tower  
Location Bounding Box        
West Bounding Coordinate        
East Bounding Coordinate        
North Bounding Coordinate        
South Bounding Coordinate        
OR if single point location        
Latitude 68.93 68.95 68.99  
Longitude -150.27 -150.21 -150.28  
  View on Google Map View on Google Map View on Google Map  
Organisms studied
Methods:The Anaktuvuk River Fire occurred in 2007 on the North Slope of Alaska. In 2008, three eddy covariance towers were established at sites representing unburned tundra, moderately burned tundra, and severely burned tundra. Several times during the 2008-2014 growing seasons approximately 70 thaw depths were made near each tower. The thaw depths were taken in two separate areas near the towers. Slightly more than half the measurements were taken every 10 m on a 100 x 40 m grid (the CALM grid) located in a representative area <50m south of the towers. The remaining measurements were randomly taken along 30 m transects emanating from the center of each eddy covariance tower in each cardinal direction. Measurements were conducted by inserting a rigid metal rod (~1 cm diameter) vertically into the soil and measuring the depth at which ice bonded soil provided firm resistance. Measurements were taken either from the top of the moss layer or from the soil surface when moss was absent.


Rocha, A.V. and G.R. Shaver (2011) Postfire energy exchange in arctic tundra: the importance and climatic implications of burn severity. Global Change Biology. doi:10.1111/j.1365-2486.2011.02441.x.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Date Date of measurement datetime   DD-MMM-YYYY    
Thaw depth Unburned Thaw depth at the Unburned flux tower number centimeter     #N/A=Missing or Not Measured
Thaw depth Moderate Thaw depth at the Moderate burn flux tower number centimeter     #N/A=Missing or Not Measured
Thaw depth Severe Thaw depth at the Severe burn flux tower number centimeter     #N/A=Missing or Not Measured