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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.

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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:2003-2009gsGPSandveg.06
Dataset Title:GPS coordinates and vegetation descriptions for the ITEX circumarctic flux survey plots 2003-2009
Investigator 1: 
First Name:Gus
Last Name:Shaver
Organization:The Ecosystems Center
Address line 2:Marine Biological Laboratory
Address line 3:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 2: 
First Name:Mark
Last Name:van Wijk
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3: 
First Name:Lorna
Last Name:Street
Investigator 4: 
First Name:Brooke
Last Name:Kaye
Investigator 5: 
First Name:Jim
Last Name:Laundre
Investigator 6: 
First Name:Mathew
Last Name:Williams
Investigator 7: 
First Name:Catherine
Last Name:Thompson
Investigator 8: 
First Name:Carrie
Last Name:McCalley
Investigator 9: 
First Name:Beth
Last Name:Bernhardt
Investigator 10: 
First Name:Bob
Last Name:Douma
Investigator 11: 
First Name:Celine
Last Name:Ronfort
Investigator 12: 
First Name:Kerry
Last Name:Dinsmore
Investigator 13: 
First Name:Robert
Last Name:Bell
Investigator 14: 
First Name:Asa
Last Name:Rennermalm
Investigator 15: 
First Name:Andy
Last Name:Fox
Investigator 16: 
First Name:Peter
Last Name:van Buuren
Investigator 17: 
First Name:Craig
Last Name:Menzies
Investigator 18: 
First Name:Scott
Last Name:Graham
Investigator 19: 
First Name:Jen
Last Name:Peters
Associate Investigators:
Keywords:ITEX flux survey, plot locations, GPS coordinates, vegetation description, populations
Abstract:GPS locations and vegetation descriptions for the ITEX flux survey plots. Survey plots were located in the Toolik Lake LTER fertilization experiment in Alaska; at Imnavait Creek, Alaska; at Paddus, Latnjajaure and the Stepps site near Abisko in northern Sweden; at various sites in Adventdalen, Svalbard; in the Zackenberg valley, Northeast Greenland; at BEO near Barrow, Alaska and at the Anaktuvuk River Burn in Alaska. Measurements were made during the growing seasons 2003 to 2009.

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.1605&urlTail=terrest/tracegas/data/2003-2009gsGPSandveg.csv
Data File Name 2003-2009gsGPSandveg.dat
Beginning Date 7/19/2003
End Date 8/17/2009
Number of Data Records 307
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 2. Added 2006 GPS data and updated metadat.txt with new site descriptions, references, files to reference etc. Also added a new identifier column called "plot size" because 2006 data include measurements made on 0.3m x 0.3m plots. Changed date in file name from 2005 to 2006. Oct 2006 LStreet
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Updated LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 5: Added Toolik and Barrow 2009 data. Changed file name from 2006 to 2009.
Version 6: Updated metadata form to newer version (without site sheet). CH 25Jan2013. Updated to newer metadata with site sheet. CH March 2013.
 
RESEARCH LOCATION:                                            
Location Name Toolik Imnavait Creek Abisko Stepps Abisko Paddus Abisko Latnjajare Adventdalen Svalbard, Norway Zackenberg Greenland Barrow Alaska Anaktuvuk River Burn 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 38N, 149 degrees 34W) Imnavait Creek (68 degrees 37N, 149 degrees 18W) Alaska, U.S. "Stepps" site (68 degrees 18N, 18 degrees 51E) near Abisko, Sweden. Paddus (68 degrees 19N, 18 degrees 51E) near Abisko, Sweden. Latnjajaure (68 degrees 21N, 18 degrees 30E) near Abisko, Sweden. Adventdalen (78 degrees 13N, 15 degrees 38E) Svalbard, Norway. Zackenberg research area zone 1a (7428 N, 2034 W), Northeast Greenland. Barrow ( 71 18' N, 156 36' W) Alaska, USA. Anaktuvuk River Burn (68 56-59' N, 150 12-16' W) Alaska, USA. 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 68.6167 68.3 68.3167 68.35 78.2166666666667 74.4666666666667 71.31 68.9 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 -149.31 18.85 18.85 18.5 15.6333333333333 -19.4333333333333 -156.6 -150.2 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 719 884 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 View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map                          
                                             
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:RESEARCH LOCATIONS:
Imnavait Creek, Alaska 2003: Measurements were made on 8 1m x 1m flux plots in different vegetation types along the topographic sequence of the west facing slope of Imnavait Creek catchment.

Imnavait Creek, Alaska 2004: Measurements were made on 15 1m x 1m plots along the topographic sequence of the west facing slope of Imnavait Creek catchment, in the same area as 2003.

Toolik Lake, Alaska 2004: Measurements were made on a total of 20 flux plots in treatment (N +P) and control blocks of the LTER fertilisation experiment at Toolik Lake, including the moist acidic tussock, non-acidic tussock, non acidic non-tussock, inlet wet sedge and heath sites.

Abisko, Sweden 2004: 11 plots were located at the Stepps site, 13 plots at Paddus and 12 plots at Latnjajaure in a range of vegetation types.

Abisko, Sweden 2005: Measurements were made on 15 plots at the Stepps site.

Svalbard 2005: Measurements were made on 41 plots at various sites in Adventdalen.

Zackenberg 2006: Measurements were made on 35 1m x 1m plots and 25 0.3m x 0.3m plots at various sites within 2km of ZERO research station - in research zone 1a.

Toolik 2009: Measurements were made on 94 plots across three vegetation types: moist acidic tussock, dry heath, and wet sedge. Each plot was measured at approximately 2 weeks intervals from mid-June to mid-August 2009.

Anaktuvuk River Burn 2009: Measurements were made on five plots along a burn severity gradient during mid-June 2009.

Barrow 2009: Measurements were made on thirteen 0.7m 0.7m flux plots along a moisture gradient during late-July to early-August 2009.


EXPERIMENTAL DESIGN AND METHODS:

GPS co-ordinates of the ITEX flux plots were taken using a differential GPS unit at the following sites:
-Imnavait Creek, Toolik 2003 (A. Rennermalm, Princeton University)
-Stepps site, Abisko 2004 (A. Fox, Durham University)

GPS co-ordinates were taken using a handheld Garmin Etrex GPS unit at the following sites:
-Paddus and Latnjajaure, Abisko 2004
-Stepps site, Abisko 2005
-Svalbard, Abisko 2005
-Zackenberg, Northeast Greenland 2006.
-Barrow 2009
-Anaktuvuk River Burn: UNB1 and SV2 plots.

GPS for other Anaktuvuk River Burn sites was assigned based on known GPS coordinates of eddy flux plots for moderate and severe burns.


CALCULATIONS: none

COMMENTS: Differential GPS points given to 7 decimal places (Toolik and Abisko Stepps 2004). All other GPS data given to 5 decimal places.

Vegetation at Zackenberg is categorised as "Cassiope heath", "Vaccinium heath", "Dryas heath", "Salix snow bed", "Fen", "Grassland" or "Abrasion plateau" according to the descriptions and mapping by Bay 1998.

FOR MORE INFORMATION CONTACT: Gus Shaver, The Ecosystems Center, Woods Hole, MA, 02543, USA

REFERENCE CITATIONS:
Bay, C. (1998) Vegetation mapping of Zackenberg Valley Northeast Greenland. Danish Polar Center.

Street, L.E., Shaver, G.R., Williams, M., van Wijk, M.T. (in press) What is the relationship
between changes in canopy leaf area and changes in photosynthetic CO2 flux in arctic ecosystems? Journal of Ecology

Williams, M., Street, L.E., van Wijk, M.T., and Shaver, G.R. (2006) Identifying Differences in Carbon Exchange among Arctic Ecosystem Types. Ecosystems, 9, 288-304.

OTHER DATA FILES TO REFERENCE:
2003-2009gsflux.dat CO2 and H2O flux data.
2004-2009gscoversp.dat. Percent cover of flux plots by species.
2004-2009gscoverft.dat. Percent cover of flux plots by functional type.
2003-2009gscurveparameters.dat. Best fit parameters describing the light response curves measured on each plot.
2003-2009gssoiltemp.dat. Soil temperature and volumetric water content of flux plots.

FORMAT OF DATA FILE: ASCII

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
YEAR year of measurement datetime   YYYY    
DATE date of measurement datetime   DD-MMM-YY    
SITE Abisko, Toolik, Svalbard or Zackenberg text        
GROUP Location of flux plots at each site text        
PLOT Individual plot identifier text        
TREAT control, or fertilised annually with N and P text        
PLOT SIZE Plot size of 1m x 1m or 0.3m x 0.3m text        
N LAT Latitude in decimal degree number degree     #N/A=Missing or Not Measured
E LONG Longitude in decimal degree number degree     #N/A=Missing or Not Measured
ELEVATION Elevation above sea level number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
VEGETATION brief description of flux plot vegetation text       #N/A=Missing or Not Measured
COMMENTS comments text        
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