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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:1993kntgas.07
Dataset Title:Methane and carbon dioxide emissions were monitored in control, greenhouse, and nitrogen and phosphorus fertilized plots of three different plant communities, Toolik Field Station, North Slope Alaska, Arctic LTER 1993.
Investigator 1: 
First Name:Joshua
Last Name:Schimel
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 2: 
First Name:Knute
Last Name:Nadelhoffer
Investigator 3: 
First Name:Gus
Last Name:Shaver
Investigator 4: 
First Name:Anne
Last Name:Giblin
Organization:Marine Biological Lab
Address line 2:7 MBL St.
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 5: 
First Name:Ed
Last Name:Rastetter
Organization:Marine Biological Lab
Address line 2:7 MBL St.
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 6: 
First Name:Jim
Last Name:Laundre
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Investigator 7: 
First Name:Georgia
Last Name:Murray
Investigator 8: 
First Name:Loretta
Last Name:Johnson
Investigator 9: 
First Name:Dawn
Last Name:Holt
Investigator 10: 
First Name:Bonnie
Last Name:Kwiatkowski
Associate Investigators:
Keywords:arctic tundra, methane emissions, carbon dioxide fluxes, climate controls, organic matter
Abstract:Methane and carbon dioxide emissions were monitored in control, greenhouse, and nitrogen and phosphorus fertilized plots of three different plant communities. This is the third year of collection data.
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.1427&urlTail=terrest/tracegas/data/1993kntgas.csv
Data File Name 1993kntgas.dat
Beginning Date 5/1/1993
End Date 9/1/1993
Number of Data Records 326
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Version 2: Added title and data table. Chnaged file name to 1993kntgas 4Oct06 JL
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 metadata form and to eml 2.1 Jim L 15Nov12
Version 6: Updated to newer metadata with site sheet. CH March 2013.
Version 7: Corrected Distrubution URL. It had xlsfiles in the path. Jim L 19Jun14
 
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 Field Station, Alaska (68 degrees 38"N, 149 degrees 38'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 68.626 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 -149.616 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:The main focus of the experiment is to determine the importance of climate controls (temperature and moisture), the effects of nutrient availability, and the source of carbon and reducing power for methanogensis in the tundra system. To obtain this type of information methane and carbon dioxide emissions were monitored in control, greenhouse, and nitrogen and phosphorus fertilized plots of three different plant ecosystems; 1. Wet Sedge Tundra 2. Tussock Tundra 3. Heath Tundra The treatments were started at the Toolik site in 1989, In 1991 the fertilized plots received 10 g N per m^2 in the form of ammonium nitrate and 5 g of P per m^2 in the form of phosphoric anhydride.
This data set was obtained by the collaboration of three projects. The LTER Arctic Tundra (NSF), The Global Change and the Carbon Balance of Arctic Ecosystems (P.I.-Shaver and others, NFS), and the main project, Controls on Radiatively Active Trace Gases in Tundra and Taiga Ecosystems (P.I.s J.Schimel and K. Nadelhoffer, EPA)
The schmatic below shows the SITE, ECOSYSTEM, # of BLOCKS within each ecosystem, the TREATMENTS (CT=Control;GH=Green House;NP=Nitrogen and Phosphorus additions) and the # OF CHAMBERS PER TREATMENT.
ALL CHAMBER BASES WERE PUT IN AT THE BEGINNING OF THE SEASON OF 1992 WITH THE EXCEPTION OF 1 CHAMBER BASE PER EACH BLOCK AT THE HEATH SITE.
TREATMENTS W/IN # OF CHAMBERS/ DATE CHAMBER
SITE ECOSYSTEM # OF BLOCKS EACH BLOCK BLOCK BASES DEPLOYED
|- 5 ::::: CT::::::::: 2-(T;IT)*
| TUSSOCK
|:TUSSOCK:::|- 5 ::::: GH::::::::: 2-(T;IT)*
| |
| |- 5 ::::: NP::::::::: 2-(T;IT)*
| :-
| subtotal 30
|
T | |- 2 ::::: CT::::::::: 3
O | | WET SEDGE
O :-|- WET SEDGE::|- 2 ::::: GH::::::::: 3
L | |
I | |- 2 ::::: NP::::::::: 3
K | :-
| subtotal 18
|
| |- 3 ::::: CT::::::::: 2
| | HEATH
|: HEATH:::-|- 2 ::::: GH::::::::: 3
|
|- 3 ::::: NP::::::::: 2
:-
subtotal 18
===
TOTAL 66

Notes: Calculated by using only T0 and T1 time samples except where these values were bad/odd.

CALCULATIONS
Variable Formula
CH4_C MG|M2|DAY: (CH4FLUX*0.012*1440)
CO2_C G|M2|DAY: (CO2FLUX*0.000012*1440)

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
ecosystem Plant community type -Tussock, Wet Sedge and Heath Tundra text        
date Date of sample datetime   dd-mmm-yyyy    
tmt Plot treatment; CT-control, NP-fertilized, GH-greenhouse text        
block Block number of treatment number number      
Morphology Tussock or intertussock moss area. text        
C_CH4 mg_m2 d1 Methane flux number milligramPerMeterSquaredPerDay      
C_CO2 mg_m2 d1 CO2 flux number milligramPerMeterSquaredPerDay      
Intergsoil Integrated soil temperature down to 30 cm. number celsius     #N/A=Missing or Not Measured

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