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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:1989_2003_Precip_Cat-An.07
Dataset Title:Precipitation cations and anions for June, July and August from a wet/dry precipitation, University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W), Arctic LTER 1989 to 2003
Investigator 1: 
First Name:Gus
Last Name:Shaver
Organization:Marine Biological Lab
Address line 2:7 MBL St
Address line 3:
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 2: 
First Name:Jim
Last Name:Laundre
Organization:Marine Biological Lab
Address line 2:7 MBL St
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Associate Investigators:
Keywords:precipitation, cations, anions, nitrogen, pH, inorganic nutrients
Abstract:Precipitation, collected from a wet/dry precipitation collector located near University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W) was sent out for standardized EPA rain water analysis. Nutrient chemistry was also run on a sub sample at the field station.
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.1422&urlTail=terrest/rain/data/1989_2003_Precip_Cat-An.csv
Data File Name 1989_2003_Precip_Cat-An
Beginning Date 6/1/1989
End Date 8/24/2003
Number of Data Records 143
Other Files to Reference
Availability Status 1
Quality Control Information
Maintenance Description
Log of Changes: Version 2: May 2006 Converted metadata to Excel worksheet and added title and attribue. 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 to newer metadata sheet (with sites). CH March 2013.
Version 7 Updated to new file name that shows the data range. Jim
 
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 University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W) . 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 68.624 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 -149.607 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:An Aerochem Metrics model 301 wet/dry precipitation collector was setup near the Arctic LTER Toolik Experimental Moist Acidic Tussock Plots during the summer months. Precipitation was collected every ten days from 1989 - 1992 and every 7 days from 1993 to present. Dryfall was collected at the end of the August fro 1989 to 1997. Presently dryfall is not collected. If any bird droppings were noted then the sample was discarded. The precipitation volume, pH, NH4-N, NO3-N, and PO4-P were measured at the field station. In 1989 NH4-N and PO4-P chemistry was done manually using standard nutrient procedures (see ARC LTER Methods Manual) with NO3-N being analyzed back in Woods Hole, MA. From 1990-1996 the nutrients were analyze using a Technicon Autoanlyzer or an Alpkem FLOW Solution Analyzer at the station. From 1997 to present analysis of pH, NH4-N and phosphorus are performed at the field station with NO3-N samples being frozen and sent back to Woods Hole, MA for analysis. A sub sample of 250ml was sent for standardized EPA rain water analysis to Global Geochemistry. Global; 6919 Eton Ave.; Canoga Park, CA 91303 until 1997 and then 1998 to present to Shepard Analytical,4545 E. Industrial St., Unit 5P;Simi Valley, CA 93063; Phone: (805) 526-7026; FAX: (805) 526-7032.

Notes: Samples sent from Alaska (not frozen) approx. every 7-10 days; Anion/Cation ratio- acceptable range 0.85-1.15. Values less than detection are negative. Numbers after minus sign are 3x the linear least squares error of fit term for the curve used to calculate data. Missing samples are designated by a #N/A.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Year Year when rain was collected text       .=Missing or Not Measured
Type Wetfall or Dryfall text       .=Missing or Not Measured
Date Collected Date when rain was collected in the field datetime   dd-mmm-yyyy   .=Missing or Not Measured
Volume Volume of water in bucket number milliliter     .=Missing or Not Measured
Field pH pH measure in the field number dimensionless     .=Missing or Not Measured
ANION_CATION Molar anion over cation ratio number dimensionless     .=Missing or Not Measured
pH pH measured in lab number dimensionless     .=Missing or Not Measured
GRAN Amount of strong acid (using GRAN tiration) uequiv/l number microequivalentPerLiter     .=Missing or Not Measured
COND Conductivity measured in lab number microsiemenPerCentimeter     .=Missing or Not Measured
F umoles_l Fluorine concentration number micromolePerKilogram     .=Missing or Not Measured
Cl umoles_l Chlorite concentration number micromolePerKilogram     .=Missing or Not Measured
NO2 umoles_l NO2 concentration number micromolePerKilogram     .=Missing or Not Measured
PO4 umoles_l PO4 concentration number micromolePerKilogram     .=Missing or Not Measured
BR umoles_l Bromine concentration number micromolePerKilogram     .=Missing or Not Measured
NO3 umoles_l Nitrate concentration number micromolePerKilogram     .=Missing or Not Measured
SO4 umoles_l SO4 concentration number micromolePerKilogram     .=Missing or Not Measured
NH4 umoles_l NH4 concentration number micromolePerKilogram     .=Missing or Not Measured
NA umoles_l Sodium concentration number micromolePerKilogram     .=Missing or Not Measured
K umoles_l Potassium concentration number micromolePerKilogram     .=Missing or Not Measured
CA umoles_l Calcium concentration number micromolePerKilogram     .=Missing or Not Measured
MG umoles_l Magnesium concentration number micromolePerKilogram     .=Missing or Not Measured
NH4-N mg/m2 NH4 umoles/l * .014 mg/umoles * volume rain * 0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
NO3-N mg/m2 NO3 umoles/l * .014 mg/umoles * volume rain * 0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
PO4-P mg/m2 PO4 umoles/l * .014 mg/umoles * volume rain * 0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
TotalN mg/m2 NH4-N mg/m2 + NO3-N mg/m2 number milligramPerMeterSquared     .=Missing or Not Measured
TLK NH4-N mg/m2 Sub sample run at Toolik. NH4 umoles/l * .014 mg/umoles * volume rain *0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
TLK NO3-N mg/m2 Sub sample run at Toolik. NO3 umoles/l * .014 mg/umoles * volume rain * 0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
TLK PO4-P mg/m2 Sub sample run at Toolik.PO4 umoles/l * .014 mg/umoles * volume rain * 0.0683 m2 area of bucket number milligramPerMeterSquared     .=Missing or Not Measured
COMMENTS Notes about individual data values. text       .=Missing or Not Measured
SO4 umole Sulfate concentraction number micromolePerKilogram     .=Missing or Not Measured

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