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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 http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml 

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.

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 "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 Poral
Dataset ID:1991gsext.06
Dataset Title:Extractable NH4-N and NO3-N (2 N KCl), PO4-P (0.025 N HCl) and pH (0.01 M CaCl2) were measured on soils from a transect along the Dalton road, Arctic LTER 1991.
Investigator 1: 
First Name:Gus
Last Name:Shaver
Organization:
Address line 2:Marine Biological Lab
Address line 3:7 MBL St
City:Woods Hole
State:Marain Biological Lab
Zip Code:02543
Country:USA
Investigator 2: 
First Name:Jim
Last Name:Laundre
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3: 
First Name:Knute
Last Name:Nadelhoffer
Investigator 4: 
First Name:Anne
Last Name:Giblin.
Associate Investigators:
Keywords:extractable nutrients, nitrogen, pH, phosphorus, arctic, soil, tundra, inorganic nutrients, organic matter
Abstract:
Extractable NH4-N and NO3-N (2 N KCl), PO4-P
(0.025 N HCl) and pH (0.01 M CaCl2) were measured on soils from a
transect along the Dalton road. Sites are Gus Shaver flowering sites and
Arctic LTER 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
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1430&urlTail=terrest/bulk/data/1991gsext.csv
Data File Name 1991gsext
Beginning Date 6/22/1991
End Date 6/28/1991
Number of Data Records 150
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: DATE RECEIVED: 31Jan96 DATA FILE ENTERED BY: Jim Laundre DATA FILE VALIDATION: 31Jan96
Version 2: Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006 Jiml
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 5: Updated units to current standards. Fixed discrepency with header variable names. Updated metadata form to newer version (without site sheet). CH 24 Jan 2013 Updated to newer metadata with site sheet. CH March 2013.
Version 6: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
 
RESEARCH LOCATION:                                            
Location Name Toolik Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One  
Geographic Description North Slope of Alaska. See file for specific locations. Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description  
Location Bounding Box                                            
West Bounding Coordinate                                            
East Bounding Coordinate                                            
North Bounding Coordinate                                            
South Bounding Coordinate                                            
OR if single point location                                            
Latitude 68.629961 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.612633 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 719 In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map                                          
                                             
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:
Cores from along the Dalton Highway
at site used by Gus Shaver for his flowering sites(see Shaver, G.R., et
al, 1986) were taken for extractions. Cores 5.46 cm in diameter were
taken to the frozen layer. Organic and mineral layers were separated and
measured in the lab. Most live plants material was removed before
extraction. For extractable NH4-N and NO3-N, 100 mls of KCl (2 N KCl)
was added to about 20 grams wet weight of homogenized soil. For PO4-P
100 mls of 0.025 N HCl was added to about 20 grams wet weight of
homogenized soil. KCl extracts were shaken for 4 hours while HCl
extracts were shaken for only 5 minutes. All extracts were immediately
filtered through Whatman No. 42 filter paper and anlyzed on a Technicon
AAII. To measure pH, 5 grams of soil in 25 mls of 0.01 M CaCl2 was used.
A subsample of soil was dryed at 50 degree C and used to convert the wet
weights to oven dry weights.

Notes: The Sag tussock cores were not measured. An
average bulk density from soils extracted in 1992 and 1993 from the same
plots was used.

Reference Citations: Shaver,G. R., N. Fetcher and F. S. Chapin,III.
1986. Growthand flowering in Eriophorum vaginatum: Annual and
latitudinal variation. Ecology, 67:1524-1535.


CALCULATIONS
variable Formula
MOISTURE: (((weight of wet soil +tare)-(weight of dry soil + tare))/((weight of dry soil + tare)-tare))*100

NOTE: All missing values are indicated by a N/A

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Date Date of sampling datetime   dd-mmm-yy    
SITE Site where samples taken from along the Dalton Highway at site used by Gus Shaver for his flowering sites(see Shaver, G.R., et al, 1986) text        
REP Replicate samples taken at each site. text        
HOR Soil horizon text       N/A=Missing or Not Measured
Code Site and microsite code: T-tussock; IT-intertussock; W-wet sedge; S-Salix/sedge; R-Riparian Shrub text     T = tussock | IT = intertussock | W = wet sedge | S = Salix/sedge | R = Riparian Shrub N/A=Missing or Not Measured
Latitude N Latitude of site in decimal degree. number degree     N/A=Missing or Not Measured
Longitude W Longitude of site in decimal degree. number degree     N/A=Missing or Not Measured
Elevation Elivation in meters. number gramPerFourHundredthMeterSquared     N/A=Missing or Not Measured
Core Length Length of each horizon in each core. number centimeter     N/A=Missing or Not Measured
Tundra type General type of tundra text       N/A=Missing or Not Measured
Moisture Percent moisture on dry-mass basis. number percent     N/A=Missing or Not Measured
Bulk Density Bulk density of soil (cm3) number gramPerCentimeterCubed     N/A=Missing or Not Measured
pH pH of soil mesured in a 0.01 M CaCl2 soil solution. number dimensionless     N/A=Missing or Not Measured
ug/g NH4-N 2 N KCl extractabe ug NH4-N per gram of dry soil. number microgramPerGram     N/A=Missing or Not Measured
ug/g NO3-N 2 N KCl extractabe ug NO3-N per gram of dry soil. number microgramPerGram     N/A=Missing or Not Measured
ug/g PO4-P 0.025 HCl extracable ug PO4-P per gram of dry soil. number microgramPerGram     N/A=Missing or Not Measured
ug|cc NH4 KCl 2 N KCl extractabe ug NH4-N per cm3 of dry soil. number microgramPerCentimeterCubed     N/A=Missing or Not Measured
ug|cc NO3 KCL 2 N KCl extractabe ug NO3-N per cm3 of dry soil. number microgramPerCentimeterCubed     N/A=Missing or Not Measured
ug|cc N KCl 2 N KCl extracable ug NH4-N +NO3-N per cm3 of dry soil. number microgramPerCentimeterCubed     N/A=Missing or Not Measured
ug|cc P HCL 0.025 HCl extracable ug PO4-P per cm3 of dry soil. number microgramPerCentimeterCubed     N/A=Missing or Not Measured
g/m2 NH4-N 2 N KCl extractabe g NH4-N per meter square per horizon. number gramPerMeterSquared     N/A=Missing or Not Measured
g/m2 NO3-N 2 N KCl extractabe g NO3-N per meter square per horizon. number gramPerMeterSquared     N/A=Missing or Not Measured
g/m2 PO4-P 0.025 HCl extracable g PO4-P per meter square per horizon. number gramPerMeterSquared     N/A=Missing or Not Measured
N:P Extractable Nitrogen to Phosphorus ratio. number dimensionless     N/A=Missing or Not Measured
Comments Comments on individual data points. text        

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.