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Bonanza Creek LTER: Annual Active Layer Depths at Core Floodplain Sites from 1990 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska

General Information
Data Package:
Local Identifier:knb-lter-bnz.11.24
Title:Bonanza Creek LTER: Annual Active Layer Depths at Core Floodplain Sites from 1990 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
Alternate Identifier:DOI PLACE HOLDER
Abstract:

Annual thaw depths are measured at the time of maximum thaw at any of the 35 BCEF-LTER sites that have permafrost or intermittent seasonal frost. 1. Wildfire in the black spruce permafrost sites will cause an increase in the active layer thickness and subsidence of the surface layers that may last for up to 25 years. The active layer thickness should return to the pre-fire depths between 25 and 30 years after the fire. 2. Climate warming in interior Alaska may result in an increase in the active layer thickness in black spruce permafrost sites. 3. Fire and climate warming together may result in the elimination of permafrost from some black spruce permafrost sites in interior Alaska. 4. Forest succession on the floodplain of the Tanana River results in a gradual decrease in soil temperature as the organic layer increases with time. The development of a thick feathermoss layer in later stages of succession is especially important in the development of permafrost. Permanent or intermittent permafrost should develop in the older white spruce stages. Black spruce stands on the older terraces should be underlain by permafrost with a shallow active layer. 5. Climate warming will delay the formation of permafrost until the latest stages of forest succession and may eliminate it completely from floodplain stands.

Short Name:knb-lter-bnz.11.24
Publication Date:2021-10-11
For more information:
Visit: http://www.lter.uaf.edu/data/data-detail/id/11

Time Period
Begin:
1990-09-06
End:
2021-09-21

People and Organizations
Contact:Data Manager (Bonanza Creek LTER) [  email ]
Creator:Viereck, Leslie 
Creator:Van Cleve, Keith 
Creator:Chapin, F Stuart (Primary Investigator (retired))
Creator:Ruess, Roger (Primary Investigator)
Organization:Bonanza Creek LTER
Associate:Winterstein, Mark (M.S. Candidate, Associated party)
Associate:Hollingsworth, Jamie (Bonanza Creek LTER Site Manager, Associated party)
Associate:Romanovsky, Vladimir (Assoc Prof, Snow, Ice and Permafrost, Associated party)
Associate:Olson, Karl (Technician, Associated party)

Data Entities
Data Table Name:
11_bcefcore_active_layer_2021.txt
Description:
Frost depth data SITE: Sampling site DATE: Date of sampling PLOT: Sampling plot DEPTH: Sampling depth (cm) Comments: Comments
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-bnz/11/24/af66d51024d011b6d1cc5b7379fad5f7
Name:11_bcefcore_active_layer_2021.txt
Description:Frost depth data SITE: Sampling site DATE: Date of sampling PLOT: Sampling plot DEPTH: Sampling depth (cm) Comments: Comments
Number of Columns:8

Table Structure
Object Name:11_bcefcore_active_layer_2021.txt
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Line Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 DateSiteStakeDepthFlaghit_typecrewnotes
Column Name:Date  
Site  
Stake  
Depth  
Flag  
hit_type  
crew  
notes  
Definition:The date the measurement was taken.Name of site where sample was taken.Stake number where the measurements were taken.Active Layer Thicknes: The depth, in cm, from the duff/living plant interface (~3cm) to frozen soil.This field, denotes any special circumstances particular to that data line.Indicates if measurement was to rock or iceInitials of field crewnotes
Storage Type:string  
string  
integer  
float  
string  
string  
string  
string  
Measurement Type:dateTimenominalnominalrationominalnominalnominalnominal
Measurement Values Domain:
FormatYYYY-MM-DD
Precision
DefinitionName of site where sample was taken.
DefinitionStake number where the measurements were taken.
Unitcentimeter
Typereal
Min0.000 
Max500.000 
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeG
DefinitionGood measurment
Source
Code Definition
CodeN
DefinitionNo Permafrost Present
Source
Code Definition
CodeM
DefinitionMissing Value
Source
DefinitionIndicates if measurement was to rock or ice
DefinitionInitials of field crew
Definitionnotes
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:
Climateactive layer, thaw depth, succession, permafrost

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:

Methods

At all of the permanent vegetation plots that have or might have permafrost the depth of the active layer is measured at the time of annual maximum thaw (mid to late September) adjacent to each of the 20 vegetation plots. Thaw depth is measured in centimeters using a metal probe at LTER sites FP5A, FP5B, FP5C, FP5D, and UP4C. The probe point is 1.5m from the vegetation stake in line with the vegetation stake and the diagonal corner of the 1X1m veg plot.

Sampling Area and Study Extent
Sampling Description:

Sampling Frequency

Annually in the fall, as close to the date of maximum thaw as possible

Sampling Extent:
Sampling Site: 
Description:FP5A -- This is a subxeric-mesic, black spruce site on the Tanana River floodplain.. Site alternate names: 251, BCEFM1
Site Coordinates:
Longitude (degree): -148.2490622Latitude (degree): 64.68147876
Sampling Site: 
Description:FP5B -- Woodland white spruce/Labrador tea-lingonberry/feathermoss community. Black spruce seedlings and saplings have invaded the site.. Site alternate names: 252
Site Coordinates:
Longitude (degree): -148.2138057Latitude (degree): 64.68149311
Sampling Site: 
Description:FP5C -- FP5C is located on an older terrace of the Tanana River on the south side of the river opposite Sam Charley Island. The climate station and neighboring research plots were burned in August of 2010 by the Willow Creek Wildfire.. Site alternate names: 253, BCEFY3
Site Coordinates:
Longitude (degree): -148.1472629Latitude (degree): 64.71361404
Sampling Site: 
Description:FP5D -- This is a mesic, black spruce site on the Tanana River floodplain.. Site alternate names: 254, BCEFM3
Site Coordinates:
Longitude (degree): -148.19274Latitude (degree): 64.72541
Sampling Site: 
Description:UP4C -- This is a subhygric, black spruce site.. Site alternate names: CPCRWM1
Site Coordinates:
Longitude (degree): -147.4913325Latitude (degree): 65.15393372

Time Period
Begin:
1990-09-06
End:
2021-09-21

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Leslie Viereck
Individual: Keith Van Cleve
Address:
Forest Soils Laboratory University of Alaska Fairbanks O'Neill Bldg,
Fairbanks, AK 99775-7200 United States
Email Address:
kvancl@rockisland.com
Individual: F Stuart Chapin
Position:Primary Investigator (retired)
Address:
Institute of Arctic Biology: University of Alaska Fairbanks,
Fairbanks, AK 99775 United States
Phone:
(907) 455-6408 (voice)
Phone:
(907) 474-6967 (fax)
Email Address:
terry.chapin@alaska.edu
Web Address:
https://sites.google.com/alaska.edu/f-stuart-chapin-iii-terry/
Individual: Roger Ruess
Position:Primary 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://people.iab.uaf.edu/roger_ruess
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
Associated Parties:
Individual: Mark Winterstein
Position:M.S. Candidate
Address:
132 Arctic Health Research Building University of Alaska Fairbanks,
Fairbanks, AK 99775 USA
Phone:
(907) 474-2652 (voice)
Role:Associated party
Individual: Jamie Hollingsworth
Position:Bonanza Creek LTER Site Manager
Address:
Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks School of Agriculture and Land Resources Management P.O. Box 756780,
Fairbanks, AK 99775 United States
Phone:
(907) 474-7470 (voice)
Phone:
(907) 474-6251 (fax)
Role:Associated party
Individual: Vladimir Romanovsky
Position:Assoc Prof, Snow, Ice and Permafrost
Address:
Geophysical Institute University of Alaska Fairbanks PO Box 757320,
Fairbanks, AK 99775 United States
Phone:
(907) 474-7459 (voice)
Phone:
(907) 474-7290 (fax)
Role:Associated party
Individual: Karl Olson
Position:Technician
Address:
Institute of Arctic Biology University of Alaska Fairbanks P.O. Box 757000,
Fairbanks, AK 99775 United States
Phone:
(907) 474-5104 (voice)
Role:Associated party
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:
1990-09-06
End:
2021-09-21
Geographic Region:
Description:Dataset geographic description information is unavailable. {datafile/geoCoverage is empty}
Bounding Coordinates:
Northern:  65.15393372Southern:  64.68195711
Western:  -148.2640747Eastern:  -147.4913325

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:

additional

Site FP5A has been losing permafrost and measurements dicsontinued in 2018. There are many NULL values with a 'N' flag. This indicates that there was no permafrost present at that probe for the given year.

Status

Ongoing

Frequency:
Other Metadata

Additional Metadata

additionalMetadata
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        |     |___element 'unitList'
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        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'YYYY-MM-DD'
        |     |     |___text '\n'
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'flag'
        |     |     |___text '\n'
        |     |___text '\n '
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