Arctic LTER

Weather at Toolik

Arctic LTER Database

Conditions of Use

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 ID:	2003gs_snowpit.04
Dataset Title:	Arctic LTER 2003: Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots.
Investigator 1:
First Name:	Gus
Last Name:	Shaver
Organization:	Shaver
Address line 2:	Marine Biological Lab
Address line 3:	7 MBL St
City:
State:	Woods Hole
Zip Code:	MA
Country:	02543
Investigator 2:
First Name:	James
Last Name:	Laundre
Organization:
Address line 2:
Address line 3:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:	snow, nitrogen, phosphorus, inorganic nutrients
Abstract:	Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots. The snow layers in each pit were described and sampled separtely with the help of Matthrew Sturm.
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.1423&urlTail=terrest/rain/data/2003gs_snowpit.csv
Data File Name	2003gs_snowpit
Beginning Date	4/27/2003
End Date	9/1/2003
Number of Data Records	11
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	For Archival Use:
	Version 3: Update LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 4: Updated metadata form to newer version (without site sheet). Updated units to current standards. Missing values changed to #N/A. Fixed discrepency with header variables. CH 25Jan2013. Updated to newer metadata with site sheet. CH March 2013.

RESEARCH LOCATION:

Location Name

Toolik

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Geographic Description

Toolik Lake (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) Moist 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

In Decimal Degrees

Longitude

-149.61058

In Decimal Degrees

Elevation

719

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	Two snow pits were dug 20 meters south of moist acidic tussock experimental plots block 3. For each pit the snow layers were described, density measured and sampled using Matthew Sturm's sampler and portable balance. The sampler was 3x6x5.5 cm. and 6 samples per layer were combined for later analysis. The samples were shipped back to Woods Hole where they were thawed and NH4-N, NO3-N and PO4-P were determined using a RFA Alpkem auto-annalyzer. For precipitation events that occurred after 27Apr2003 and before setting up of precipitaion collectors for nutrient analysis, the amount of nutrients were estimated based on a volume weighed average of the concentrations in the layers of the two snow pits.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Sample type	Type of sample: either a snow sample or using precipitation data to estimate snow nutrient values	text
Sample Date	Date of sample or precipitation	datetime		dd-mmm-yyyy
Location	Location of sample or precipitation station	text
Sample label	Label of sample. Includes the depth sample. 0 depth is soil surface.	text
Layer Thickness cm	Thickness of snow layer	text				#N/A
Description	Describes the layer	text
Snow density g/cm3	Density of the snow	number	gramPerCentimeterCubed			#N/A
Snow water equiv. per layer cm	The water equivalent of the snow. The layer thickness * Snow density	text
NH4 um/l rep 1	NH4-N analysis of replicate 1	number	micromolePerKilogram			#N/A
NH4 um/l rep 2	NH4-N analysis of replicate 2	number	micromolePerKilogram			#N/A
NH4-n um/l	Average NH4-N of the replicates	number	micromolePerKilogram			#N/A
NO3 um/l rep1	NO3-N analysis of replicate 1	number	micromolePerKilogram			#N/A
NO3 um/l rep2	NO3-N analysis of replicate 2	number	micromolePerKilogram			#N/A
NO3-N um/l	Average NO3-N of the replicates	number	micromolePerKilogram			#N/A
PO4-P um/l	PO4-P analysis	number	micromolePerKilogram			#N/A
um NH4-N	Micromoles of NH4-N in each layer	number	micromole			#N/A
um NO3-N	Micromoles of NO3-N in each layer	number	micromole			#N/A
um PO4-P	Micromoles of PO4-P in each layer	number	micromole			#N/A
PO4-P mg/m2	mg of PO4-P per m^2 in each layer	number	milligramPerMeterSquared			#N/A
NH4-N mg/m2	mg of NH4-N per m^2 in each layer	number	milligramPerMeterSquared			#N/A
NO3-N mg/m2	mg of NO3-N per m^2 in each layer	number	milligramPerMeterSquared			#N/A
Total N mg/m2	mg of N per m^2 in each layer	number	milligramPerMeterSquared			#N/A
Comments	Comments	text				#N/A

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