Arctic LTER

Weather at Toolik

Arctic LTER Database

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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.
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Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	1997shextsoilcats.05
Dataset Title:	Extractable soil cations (K, Ca, Mg, Na) for intertussock O and B horizon soils on moist acidic and non-acidic tundra, Arctic LTER 1997.
Investigator 1:
First Name:	Sarah
Last Name:	Hobbie
Organization:	Department of Ecology, Evolution and Behavior
Address line 2:	University of Minnesota
Address line 3:	1987 Upper Buford Circle
City:	St. Paul
State:	MN
Zip Code:	55108
Country:	USA
Investigator 2:
First Name:	Laura
Last Name:	Gough
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Jim
Last Name:	Laundre
Associate Investigators:
Keywords:	soil cations, moist acidic tundra, moist non-acidic tundra, inorganic nutrients
Abstract:	Extractable soil cations (K, Ca, Mg, Na) for intertussock O and B horizon soils on moist acidic and non-acidic tundra.
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.1433&urlTail=terrest/bulk/data/1997shextsoilcats.csv
Data File Name	1997shextsoilcats
Beginning Date	8/7/1997
End Date	8/8/1997
Number of Data Records	24
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Version 2: Checked file and created eml and html files. Feb 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: 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.

RESEARCH LOCATION:

Location Name

LTER Moist Acidic Tussock Tundra

LTER Moist NonAcidic Tussock Tundra

Select Site or enter New One

Geographic Description

Arctic LTER, Toolik Field Station, North Slope Alaska(68 degrees 38'N, 149 degrees 34'W, elevation 760 m). Moist Acidic Tussock Tundra.

Arctic LTER, Toolik Field Station, North Slope Alaska(68 degrees 38'N, 149 degrees 34'W, elevation 760 m). Moist Non-acidic Tussock Tundra.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.62405

68.6342

In Decimal Degrees

Longitude

-149.61058

-149.64074

In Decimal Degrees

Elevation

750

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	On 7 August 1997, we collected 5.2-cm diameter soil cores (up to 30 cm depth depending on depth of thaw) from six randomly selected locations (between tussocks) at each site. The cores were separated into organic and mineral horizons, all live plant material and coarse roots were removed, and each horizon from each core was homogenized separately. Dried and ground soils (using a coffee grinder) for each horizon and from each of the six locations at each site were analyzed for exchangeable base cations (Ca, Mg, K, Na) using ammonium acetate extraction followed by ICP (Thomas 1982). Soils within horizons and sites were bulked for analyses of cation exchange capacity and percent base saturation, determined by the sum of base cations extracted with ammonium acetate followed by ICP and exchangeable acidity extracted by barium chloride (Thomas 1982; Soil Conservation Service 1992). Analyses were done at the University of Minnesota's Research Analytical Laboratory.. Calculations: Kcmol (Kppm x 100)/(39.1 x 1000) Cacmol (Cappm x 100 x 2)/(40.1 x 1000) Mgcmol (Mgppm x 100 x 2)/(24.3 x 1000) Nacmol (Nappm x 100)/(22.9 x 1000) Reference Citations: Hobbie, SE and L Gough. In press. Foliar and soil nutrients in tundra on glacial landscapes of contrasting ages in northern Alaska. Oecologia

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	date in DD-MMM-YYYY format	datetime		DD-MMM-YYYY
Site	MAT refers to moist acidic tundra; MNT refers to moist non-acidic tundra	text
Horizon	refers to soil horizon (O or B) for which analyses were done	text
Rep	replicate (1-6)	text
Kppm	exchangeable K mg Al/kg soil	number	partPerMillion			.
Cappm	exchangeable Ca mg Ca/kg soil	number	partPerMillion			.
Mgppm	exchangeable Mg mg K/kg soil	number	partPerMillion			.
Nappm	exchangeable Na mg Mg/kg soil	number	partPerMillion			.
Kcmol	exchangeable K cmol +/kg soil	number	centimolePerKilogram			.
Cacmol	exchangeable Ca cmol +/kg soil	number	centimolePerKilogram			.
Mgcmol	exchangeable Mg cmol +/kg soil	number	centimolePerKilogram			.
Nacmol	exchangeable Na cmol +/kg soil	number	centimolePerKilogram			.
CEC	cation exchange capacity cmol +/kg soil	number	centimolePerKilogram			.
BaseSat	percent base saturation percent	number	percent			.
COMMENTS	these are comments regarding specific data points	text

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