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Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Weekly thaw depth data, 2011-2020

General Information
Data Package:
Local Identifier:knb-lter-bnz.496.20
Title:Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Weekly thaw depth data, 2011-2020
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment (DryPEHR), which is situated with the Carbon in Permafrost Experimental Heating Research (CiPEHR) project and located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Warming treatment here refers to growing season air temperature warming (~1C) using open top chambers (OTC) combined with soil 'warming' using snow fences during the snow covered months. Drying is achieved using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. This data set includes weekly ground thaw measurements.

Short Name:knb-lter-bnz.496.20
Publication Date:2021-02-12
For more information:
Visit: http://www.lter.uaf.edu/data/data-detail/id/496

Time Period
Begin:
2011-05-04
End:
2020-09-24

People and Organizations
Contact:Data Manager (Bonanza Creek LTER) [  email ]
Creator:Kelley, Allison K (Ph.D. Student)
Creator:Pegoraro, Elaine F. 
Creator:Mauritz, Marguerite (Research Associate Professor)
Creator:Hutchings, Jack A. 
Creator:Natali, Susan M.N. (Affiliate Scientist)
Creator:Schuur, Edward A.G. (Senior Investigator)
Organization:Bonanza Creek LTER

Data Entities
Data Table Name:
496_EML_AK_DryPEHR_thaw_depth_data_2011-2020.csv
Description:
This data set includes weekly ground thaw measurements.
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-bnz/496/20/52c52b33d9e52f7adb6fe44fb5eed420
Name:496_EML_AK_DryPEHR_thaw_depth_data_2011-2020.csv
Description:This data set includes weekly ground thaw measurements.
Number of Columns:12

Table Structure
Object Name:496_EML_AK_DryPEHR_thaw_depth_data_2011-2020.csv
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Line Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 dateblockfenceplotidwwswdrytdtreatmentgroupingnote
Column Name:date  
block  
fence  
plot  
id  
ww  
sw  
dry  
td  
treatment  
grouping  
note  
Definition:Date measurement was takenExperimental block (spatially determined)snow fence #plot # within each fencetype of sampling locationwinter warming treatmentsummer warming treatmentdrying treatmentthaw depthcombined treatment identifiergrouping names; derived from thaw depth (shallow or deep) and water table depth measurements over time.Additional information for the row's entry
Storage Type:string  
string  
string  
string  
string  
string  
string  
string  
float  
string  
string  
string  
Measurement Type:dateTimenominalnominalnominalnominalnominalnominalnominalrationominalnominalnominal
Measurement Values Domain:
FormatYYYY-MM-DD
Precision
DefinitionExperimental block (spatially determined)
Definitionsnow fence #
Definitionplot # within each fence
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codeplot
Definition flux plot; gas = gaswell plot; water = water well
Source
Definitionwinter warming treatment
Definitionsummer warming treatment
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codec
Definitioncontrol; d=dry (i.e.
Source
Code Definition
Codec
Definitioncontrol; d=dry (i.e.
Source
Unitcentimeter
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codecontrol
Definition control for both manipulations; dry = drying treatment; drywarm = warming and drying treatment
Source
Definitiongrouping names; derived from thaw depth (shallow or deep) and water table depth measurements over time.
DefinitionAdditional information for the row's entry
Missing Value Code:                        
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.

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-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-01-JV-11261952-231).

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.

Keywords

By Thesaurus:
Disturbancethaw depth, active layer, warming, permafrost, tundra, drying, water table, snowfences, open top chamber

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

The DryPEHR project is adjacent to the Eight Mile Lake (EML) watershed and EML natural thaw gradient, and is situated in the northern foothills of the Alaska Range. Permafrost temperature has been monitored annually on a gentle north-facing slope at this site in a 30-m-deep borehole that was installed in 1985. Warming treatment here refers to growing season air temperature warming using open top chambers (OTC) combined with soil insulation using snow fences during the snow covered months. Drying is achieved using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. PLEASE NOTE that the control (no drying or warming treatment) for DryPEHR comes from the CiPEHR treatment and is thus identical to the CiPEHR WW and SW control. Ie: DryPEHR plot A = CiPEHR plot 2 and DryPEHR control water wells = CiPEHR control water wells.Heterogeneous microtopography as a result of subsidence has caused variable moisture conditions with some plots periodically or continuously flooded during the thawed period and some plots remaining dry. The water dynamics driven by landscape position are difficult to control via experimental pumping and the Control/Dry treatment designations may therefore not be accurate qualitative descriptors. A subset of the original plots were measured in 2019 from April to June. A full set of all plots were measured from June to September. The full set of measurements resumed in 2020.

Methods

Data were measured weekly during the growing season using a metal thaw depth probe. Thaw depth was measured in three (2001-2013) or two (2014 onward) locations around each experimental plot; the average of these sub-replicates are reported here.

Sampling Area and Study Extent
Sampling Description:

Sampling Frequency

Weekly

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:
2011-05-04
End:
2020-09-24

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Creators:
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: Elaine F. Pegoraro
Email Address:
elainepegoraro@lbl.gov
Individual: Marguerite Mauritz
Position:Research Associate Professor
Address:
University of Texas, El Paso, 500 W University,
El Paso, TX 79902 United States
Email Address:
memauritz@utep.edu
Web Address:
https://expertise.utep.edu/profiles/memauritz
Individual: Jack A. Hutchings
Address:
Department of Earth and Planetary Sciences, Rudolph Hall Rm 110, One Brookings Drive, Washington University in St. Louis ,
St. Louis, MO 63160 United States
Phone:
813-523-8683 (voice)
Email Address:
jackh@wustl.edu
Web Address:
https://scholar.google.com/citations?user=DEiFDNEAAAAJ&hl=en
Individual: Susan M.N. Natali
Position:Affiliate Scientist
Address:
Woods Hole Research Center, 149 Woods Hole Road,
Falmouth, MA 02540 United States
Phone:
508-444-1560 (voice)
Email Address:
snatali@whrc.org
Web Address:
http://www.whrc.org/about/cvs/snatali.html
Individual: Edward A.G. 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:
2011-05-04
End:
2020-09-24
Sampling Site: 
Description:Dataset geographic description information is unavailable. {datafile/geoCoverage is empty}
Site Coordinates:
Longitude (degree): -149.225556Latitude (degree): 63.883056

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
Funding:

NSF Grant numbers 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-01-JV-11261952-231)

Maintenance

Maintenance:
Description:

Status

Ongoing

Frequency:
Other Metadata

Additional Metadata

additionalMetadata
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        |     |     |        \___attribute 'id' = 'YYYY-MM-DD'
        |     |     |___text '\n'
        |     |___text '\n '
        |___text '\n '

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