Environmental Data Initiative logo
EDI Staging Environment

Data Package Metadata   View Summary

Permafrost thaw monitoring in Denali National Park: Thermokarst transect surveys 2013-2023

General Information
Data Package:
Local Identifier:knb-lter-bnz.820.2
Title:Permafrost thaw monitoring in Denali National Park: Thermokarst transect surveys 2013-2023
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This dataset contains variables measured at thawed, ice-rich permafrost sites in Denali National Park and Preserve. Transects were established at seven sites in the Toklat river basin in 2013 to understand how ecosystem characteristics changed following permafrost thaw. Transects were co-located with known thaw subsidence (thermokarst) or erosional features and run from outside (relatively undisturbed tundra) through the feature. These data represent a long-term monitoring project of permafrost and ecosystem characteristics, surveyed initially in 2013 and re-surveyed 10 years later in 2023.

Short Name:knb-lter-bnz.820.2
Publication Date:2024-11-19
For more information:
Visit: http://www.lter.uaf.edu/data/data-detail/id/820
Visit: DOI PLACE HOLDER

Time Period
Begin:
2013-08-13
End:
2023-08-10

People and Organizations
Contact:Data Manager (Bonanza Creek LTER) [  email ]
Creator:Lathrop, Emma R (PhD student)
Creator:Webb, Elizabeth E 
Creator:Kelley, Allison K (Ph.D. Student)
Creator:Ledman, Justin (Site Technician)
Creator:Schuur, Edward (Senior Investigator)
Organization:Bonanza Creek LTER

Data Entities
Data Table Name:
820_DNP_Thermokarst_TransectSurveys_2013-2023.csv
Description:
Contains variables measured on each transect point in 2013 and repeat measurements in 2023.
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-bnz/820/2/3496fadf709a11bb4e6fc4595ebbcd9b
Name:820_DNP_Thermokarst_TransectSurveys_2013-2023.csv
Description:Contains variables measured on each transect point in 2013 and repeat measurements in 2023.
Number of Columns:12

Table Structure
Object Name:820_DNP_Thermokarst_TransectSurveys_2013-2023.csv
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Line Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 yeardate (yyyy/mm/dd)sitetransectdistancethawDepthorganicThicknesstallestShrubshrubSpeciesndvielevationnotes
Column Name:year  
date (yyyy/mm/dd)  
site  
transect  
distance  
thawDepth  
organicThickness  
tallestShrub  
shrubSpecies  
ndvi  
elevation  
notes  
Definition:year measurement was madeDate measurement was takenUnique thermokarst site:Transect ID (1 or 2, if 100m transect, always 1)Distance from start of transectthaw depththickness of organic soil layerheight of the tallest shrubspecies of tallest shrub in quadratNormalized Difference Vegetation IndexElevation in m above seal levelNotes about measurements
Storage Type:string  
string  
string  
integer  
integer  
float  
float  
float  
string  
string  
float  
string  
Measurement Type:ratiorationominalnominalnominalratioratioratioratioratiorationominal
Measurement Values Domain:
Unityyyy
Typereal
Unitm/d/yyyy
Typereal
DefinitionUnique thermokarst site:
DefinitionTransect ID (1 or 2, if 100m transect, always 1)
DefinitionDistance from start of transect
Unitcentimeter
Typereal
Unitcentimeter
Typereal
Unitcentimeter
Typereal
Unitdimensionless
Typereal
Unitdimensionless
Typereal
Unitmeter
Typereal
DefinitionNotes about measurements
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 Package Usage Rights

Data Use

This work has been produced as part of the Long Term Ecological Research Program and data users should adhere to the Data Use Agreement of the Long Term Ecological Research Network. The consumer of these data (“Data User” herein) has an ethical obligation 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 coauthorship 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.

Citation

It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User should 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(s), Year of Data Publication, Title of Dataset, Publisher, Dataset identifier, Dataset URL, Dataset DOI. For Example: Van Cleve, Keith; Chapin, F. Stuart; Ruess, Roger W. 2016. Bonanza Creek Experimental Forest: Hourly Temperature (sample, min, max) at 50 cm and 150 cm from 1988 to Present, Bonanza Creek LTER - University of Alaska Fairbanks. BNZ:1, http://www.lter.uaf.edu/data/data-detail/id/1. doi:10.6073/pasta/725db90d86686be13e6d6b2da5d61217.

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 are provided by the Bonanza Creek LTER, a partnership between the University of Alaska Fairbanks, and the U.S. Forest Service. Significant funding for collection of these data was provided by the National Science Foundation Long-Term Ecological Research program (NSF Grant numbers DEB-2224776, DEB-1636476, DEB-1026415, DEB-0620579, DEB-0423442, DEB-0080609, DEB-9810217, DEB-9211769, DEB-8702629) and by the USDA Forest Service, Pacific Northwest Research Station (Agreement # RJVA-PNW-20-JV-11261932-018).

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.

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.

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 in its present condition. 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.

Additional Acknowledgements

The�Schuur lab�data provided on this site are freely available and were furnished by individual�Schuur lab�members who encourage their use. Please kindly email the appropriate�Schuur lab�scientist(s) (PI) to inform them of how you intend to use the data and of any publication plans. It is also important to contact the�Schuur lab�investigator to assure you are downloading the latest revision of the data and to prevent potential misuse or misinterpretation of the data. Please acknowledge the data source as a citation. If the�Schuur lab�(PIs) feel that they should be acknowledged or offered participation as authors, they will let you know and we assume that an agreement on such matters will be reached before publishing and/or use of the data for publication. If your work directly competes with the�Schuur lab�analysis they may ask that they have the opportunity to submit a manuscript before you submit one that uses unpublished data. In addition, when publishing please acknowledge the agency that supported the research. Lastly, we kindly request that those publishing papers using�Schuur lab�data provide reprints to the PIs. [This statement taken from The Ameriflux Network data sharing policy]. Department of Energy NICCR Program; Department of Energy Terrestrial Ecosystem Processes; National Science Foundation CAREER Program; National Parks Inventory and Monitoring Program; National Science Foundation Bonanza Creek LTER program; National Science Foundation Office of Polar Programs, Arctic Natural Sciences Program.

Keywords

By Thesaurus:
DisturbanceNormalized Difference Vegetation Index (NDVI), vegetation, seasonality, phenology, canopy cover, active layer, permafrost, thaw depth, tundra, warming, elevation, thermokarst

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:

Experimental Design

In 2013, sampling sites were chosen non-randomly based on aerial photographs from a fly-over on July 11, 2013. All sampling sites were located in the Toklat basin of Denlai National Park and were selected for thermokarst features. Site GPS coordinates are as follows: Boundary (63.800066, -149.90239), Lower East Fork (63.83112, -149.918379), Pitchfork (63.800488, -149.949335), Lower East Fork Cabin (LEF Cabin) (63.77785, -149.98401), Wigand Creek (63.741252, -150.034697) Wigand Weather Station (WWS) Burned and Unburned (63.814385, -150.106263). Transects were placed in areas of active thaw to where future thaw is predicted (0m is unthawed and end of transect is fully thawed). Transects were 100 m long or were two 50 m transects were set up in parallel burned and unburned areas. All variables were measured at sampling points every 5 m. In 2023, transects were resurveyed and sampling points were located using a high accuracy Trimble dGPS.

Methods

FIELD: Data were collected every 5m along transects at sampling quadrats. Each sample quadrat is 1 m2 at each GPS point. The quadrat was placed on the lower left corner of the GPS point, looking down transect. Elevation: A Trimble dGPS with real time kinematic correction was used to collect point measurements of elevation every 5m along the transects. Each point was measured for 3-5 seconds. Coordinates are reported in the NAD83 coordinate system. Thaw depth: Measurements were collected using a metal thaw depth probe at 5m increments along the transect. Thaw depts greater than 100 cm could not be measured due to the length of the thaw probe. NDVI: Data was collected with a handheld TetraCam ADC camera (Tetracam, Inc) and images were processed using Pixelwrench software. Each image was taken at the plot level and included a white calibration square that was used to quantify incoming light during image processing. NDVI was calculated as (NIR-vis)/(NIR + vis). "NIR" refers to reflected near infrared light and "vis" refers to reflected visible light. A correction factor (NDVI_correction) was applied to data processed before 2015 because changed to Pixelwrench software in 2015 increased NDVI values by approximately 0.309. We determined this offset by processing pre-2015 images using 2015 software and by processing 2015 images using pre-2015 software. There was no seasonal bias in this offset. Height of tallest shrub: the tallest shrub was measured from the height of the moss surface, not the base of the shrub. In 2013 only, the species of the tallest shrub was recorded. Thickness of organic layer: Organic layer thickness was measured by slicing tundra with a bread knife until mineral soil was reached. The depth to reach mineral soil is the organic layer thickness, but the thickness could not be resolved if it was greater than 20cm. LAB: NA

Sampling Area and Study Extent
Sampling Description:

Sampling Frequency

Tansects were surveyed once in 2013 and once in 2023.

Sampling Extent:
Sampling Site: 
Description:EML -- Tussock tundra at treeline with permafrost thaw and thermokarst. This site is in the Eight Mile Lake Watershed, west of the town of Healy on Stampede Road, Interior Alaska. This area contains three sites on a permafrost thaw gradient and a nearby experimental snow fence manipulation.. Site alternate names:
Site Coordinates:
Longitude (degree): -149.239569Latitude (degree): 63.880708

Time Period
Begin:
2013-08-13
End:
2023-08-10

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@edirepository.org
Web Address:
https://edirepository.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Emma R Lathrop
Position:PhD student
Address:
Northern Arizona University: Ecosystem Science and Society Center (ECOSS) PO Box 5620,
Flagstaff, AZ 86011 United States
Phone:
505-695-6395 (voice)
Email Address:
el498@nau.edu
Web Address:
https://www2.nau.edu/schuurlab-p/
Individual: Elizabeth E Webb
Address:
220 Bartram Hall; Department of Biology; University of Florida,
Gainesville, FL 32611 United States
Phone:
352-273-0135 (voice)
Email Address:
webbe@ufl.edu
Individual: Allison K Kelley
Position:Ph.D. Student
Address:
Center for Ecosystem Science and Society, POBox 5620,
Flagstaff, AZ 86011 United States
Phone:
774-239-3709 (voice)
Email Address:
akk259@nau.edu
Web Address:
https://www2.nau.edu/schuurlab-p/Kelley.html
Individual: Justin Ledman
Position:Site Technician
Address:
PO Box 18 Healy, AK 99743,
Healy, AK 99743 United States
Phone:
651-895-0474 (voice)
Email Address:
justin.ledman@gmail.com
Individual: Edward Schuur
Position:Senior Investigator
Address:
Northern Arizona University: Ecosystem Science and Society Center (ECOSS) PO Box 5620,
Flagstaff, AZ 86011 United States
Phone:
(928) 523-8344 (voice)
Email Address:
Ted.Schuur@nau.edu
Web Address:
https://www2.nau.edu/schuurlab-p/
Organization:Bonanza Creek LTER
Address:
Boreal Ecology Cooperative Research Unit,
University of Alaska Fairbanks,
P.O. Box 756780,
Fairbanks, AK 99775 USA
Phone:
907-474-6364 (voice)
Phone:
907-474-6251 (fax)
Email Address:
uaf-bnz-im-team@alaska.edu
Web Address:
http://www.lter.uaf.edu
Contacts:
Organization:Bonanza Creek LTER
Position:Data Manager
Address:
Boreal Ecology Cooperative Research Unit,
University of Alaska Fairbanks,
P.O. Box 756780,
Fairbanks, AK 99775 USA
Phone:
907-474-6364 (voice)
Phone:
907-474-6251 (fax)
Email Address:
uaf-bnz-im-team@alaska.edu
Web Address:
http://www.lter.uaf.edu
Metadata Providers:
Organization:Bonanza Creek LTER
Position:Data Manager
Address:
Boreal Ecology Cooperative Research Unit,
University of Alaska Fairbanks,
P.O. Box 756780,
Fairbanks, AK 99775 USA
Phone:
907-474-6364 (voice)
Phone:
907-474-6251 (fax)
Email Address:
uaf-bnz-im-team@alaska.edu
Web Address:
http://www.lter.uaf.edu

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
2013-08-13
End:
2023-08-10
Geographic Region:
Description:Dataset geographic description information is unavailable. {datafile/geoCoverage is empty}
Bounding Coordinates:
Northern:  63.83112Southern:  63.741252
Western:  -150.106263Eastern:  -149.90239

Project

Parent Project Information:

Title:The Bonanza Creek LTER
Personnel:
Individual: Keith Van Cleve
Organization:Bonanza Creek LTER
Position:Lead Principal Investigator
Role:Principal Investigator
Individual: F.S. Stuart Chapin
Organization:Bonanza Creek LTER
Position:Lead Principal Investigator
Address:
Department of Biology and Wildlife; Institute of Arctic Biology: University of Alaska Fairbanks 193 Arctic Health P.O. Box 757000,
Fairbanks, AK 99775 United States
Phone:
(907) 455-6408 (voice)
Phone:
(907) 474-6967 (fax)
Email Address:
terry.chapin@alaska.edu
Web Address:
http://terrychapin.org/
Role:Principal Investigator
Individual: Roger W. Ruess
Organization:Bonanza Creek LTER
Position:Lead Principal Investigator
Address:
Institute of Arctic Biology University of Alaska Fairbanks P.O. Box 757000,
Fairbanks, AK 99775-0180 United States
Phone:
(907) 474-7153 (voice)
Phone:
(907) 474-6967 (fax)
Email Address:
rwruess@alaska.edu
Web Address:
http://www.iab.uaf.edu/~roger_ruess/
Role:Principal Investigator
Individual: Michelle Cailin Mack
Organization:Bonanza Creek LTER
Position:Lead Principal Investigator
Address:
Northern Arizona University: Ecosystem Science and Society Center (ECOSS) PO Box 5620,
Flagstaff, AZ 86011 United States
Phone:
(928) 523-9415 (voice)
Email Address:
Michelle.Mack@nau.edu
Web Address:
https://macklab.nau.edu/
Role:Principal Investigator
Funding:

NSF Grant numbers DEB-2224776, DEB-1636476, DEB-1026415, DEB-0620579, DEB-0423442, DEB-0080609, DEB-9810217, DEB-9211769, DEB-8702629

USDA Forest Service, Pacific Northwest Research Station (Agreement # RJVA-PNW-20-JV-11261932-018)

Maintenance

Maintenance:
Description:

Status

Completed

Frequency:
Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n      '
        |___element 'metadata'
        |     |___text '\n         '
        |     |___element 'unitList'
        |     |     |___text '\n            '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'm/d/yyyy'
        |     |     |___text '\n            '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'nounits'
        |     |     |___text '\n            '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'yyyy'
        |     |     |___text '\n         '
        |     |___text '\n      '
        |___text '\n   '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

UNM logo UW-M logo