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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:2007-2012_GS_ReflectanceIndices.03
Dataset Title:Vegetation indices calculated from reflectance spectra collected at LTER plots at Toolik Lake, Alaska during the 2007-2012 growing seasons.
Investigator 1: 
First Name:Gus
Last Name:Shaver
Organization:The Ecosystems Center, MBL
Address line 2:7 MBL St.
Address line 3:
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Associate Investigators:
Keywords:vegetation indices, normalized difference vegetation index, Enhanced Vegetation Index, Enhanced Vegetation Index 2, Water Band Index, chlorophyll, Photochemical Reflectance Index, MODIS, leaf area index, reflectance, canopies, spectral monitoring, growing season, fertilization
Abstract: Vegetation indices calculated from reflectance spectra collected at LTER plots at Toolik Lake, Alaska during the 2007-2012 growing seasons.
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.10185&urlTail=terrest/tracegas/data/2007-2012_GS_ReflectanceIndices.csv
Data File Name 2007-2012_GS_ReflectanceIndices
Beginning Date 6/20/2007
End Date 8/9/2012
Number of Data Records 11572
Other Files to Reference 2007-2012_GS_ReflectanceDataScan
Availability Status Type 1
Quality Control Information Reflectance values less than zero or greater than one were replaced with "NaN" before indices were calculated
Maintenance Description This data has been collected annually at multiple times during the growing season. The data is compiled in the interim between years.
Log of Changes: Updated Metadata sheet
Version 2: Updated to newer metadata form (with sites sheet). CH March 2013.
Version 3: Corrected Distrubution URL. It had xlsfiles in the path. Jim L 19Jun14
 
RESEARCH LOCATION:                                          
Location Name LTER Heath Tundra LTER Moist Acidic Tussock Tundra LTER Moist NonAcidic Tussock Tundra LTER Moist NonAcidic NonTussock Tundra LTER Shrub Tundra Block 1 LTER Wet Sedge Tundra Block 1 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 LTER Heath Site (HTH) Toolik Lake LTER Moist Acidic Tussock Site (MAT) Toolik Lake LTER Moist Non-Acidic Tussock Site (MNAT) Toolik Lake LTER Non-Acidic Non-Tussock Site (NANT) Toolik Lake LTER Shrub Site (SHB) Toolik Lake LTER Wet Sedge Site (WSG) 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 68.641727 68.624411 68.634039 68.634531 68.635624 68.625441 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 -149.586653 -149.609589 -149.637049 -149.642058 -149.587064 -149.602873 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 724 750 750 748 745 717 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                              
                                           
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
SCAN ID Unique identification for each scan; created by combining the year "YYYY", vegetation abbriviation (LTR), and a number. text        
YEAR sample year datetime   YYYY    
DATE Day of data collection datetime   DD-MMM    
DOY Julian day of data collection number dayOfYear      
DegDay Sum of degrees Celsius above zero from June 1 to the DOY of collection. number degree     NoYr=Missing or Not Measured
TIME 24-hour time of data collection datetime   HH:MM    
SITE Toolik (Toolik Lake LTER) text        
EXPERIMENT Refers to which vegetation type is being manipulated, except for "LOF" which refers to moist acidic tussock vegetation that differs from the MAT experiment induration and fertilization regime. text        
BLOCK Which replicate block the plot is located in number number      
TREATMENT Which fertilization regime the plot is undergoing text        
REP Number of the replicate scan, typically between 1 - 5. See EXPERIMENTAL DESIGN AND METHODS. number number      
NDVI (MODIS) Calculated NDVI for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
EVI (MODIS) Calculated EVI for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
EVI2 (MODIS) Calculated EVI2 for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
PRI (550 Reference) Calculated PRI (550) for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
PRI (570 Ref) Calculated PRI (570) for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
WBI Calculated WBI for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
Chl Index Calculated Chl a Index for scan. see EXPERIMENTAL DESIGN AND METHODS number dimensionless      
LAI Calculated Leaf Area Index for scan. see EXPERIMENTAL DESIGN AND METHODS number meterSquaredPerMeterSquared      

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