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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 via LTER Data Poral
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 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 Toolik Lake (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) Moist Acidic Tussock Tundra. 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 68.62405 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 -149.61058 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: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       #N/A=Missing or Not Measured
Sample Date Date of sample or precipitation in dd-mmm-yy except for precipitation by month text       #N/A=Missing or Not Measured
Location Location of sample or precipitation station text       #N/A=Missing or Not Measured
Sample label Label of sample. Includes the depth sample. 0 depth is soil surface. text       #N/A=Missing or Not Measured
Layer Thickness cm Thickness of snow layer text       #N/A=Missing or Not Measured
Description Describes the layer text       #N/A=Missing or Not Measured
Snow density g/cm3 Density of the snow number gramPerCentimeterCubed     #N/A=Missing or Not Measured
Snow water equiv. per layer cm The water equivalent of the snow. The layer thickness * Snow density text       #N/A=Missing or Not Measured
NH4 um/l rep 1 NH4-N analysis of replicate 1 number micromolePerKilogram     #N/A=Missing or Not Measured
NH4 um/l rep 2 NH4-N analysis of replicate 2 number micromolePerKilogram     #N/A=Missing or Not Measured
NH4-n um/l Average NH4-N of the replicates number micromolePerKilogram     #N/A=Missing or Not Measured
NO3 um/l rep1 NO3-N analysis of replicate 1 number micromolePerKilogram     #N/A=Missing or Not Measured
NO3 um/l rep2 NO3-N analysis of replicate 2 number micromolePerKilogram     #N/A=Missing or Not Measured
NO3-N um/l Average NO3-N of the replicates number micromolePerKilogram     #N/A=Missing or Not Measured
PO4-P um/l PO4-P analysis number micromolePerKilogram     #N/A=Missing or Not Measured
um NH4-N Micromoles of NH4-N in each layer number micromole     #N/A=Missing or Not Measured
um NO3-N Micromoles of NO3-N in each layer number micromole     #N/A=Missing or Not Measured
um PO4-P Micromoles of PO4-P in each layer number micromole     #N/A=Missing or Not Measured
PO4-P mg/m2 mg of PO4-P per m^2 in each layer number milligramPerMeterSquared     #N/A=Missing or Not Measured
NH4-N mg/m2 mg of NH4-N per m^2 in each layer number milligramPerMeterSquared     #N/A=Missing or Not Measured
NO3-N mg/m2 mg of NO3-N per m^2 in each layer number milligramPerMeterSquared     #N/A=Missing or Not Measured
Total N mg/m2 mg of N per m^2 in each layer number milligramPerMeterSquared     #N/A=Missing or Not Measured
Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.