LTER network Toolik Field Station MBLhome page

Weather at Toolik

Toolik Weather Graphs

Arctic LTER Weather Stations

Toolik Webcam

Animated Gif of yesterday's Webcam

Arctic LTER Inhouse login

Arctic LTER Database

Arctic LTER Database

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:2012_GS_PFandCH_GPS.05
Dataset Title:Plot descriptions and location data from datalogger, 1m x 1m chamber flux and point frame plots sampled near Toolik Field Station in Alaska the summer of 2012.
Investigator 1: 
First Name:Gaius
Last Name:Shaver
Organization:Ecosystems Center at the Marine Biological Laboratory
Address line 2:7 MBL Street
Address line 3:
City:Woods Hole
State:MA
Zip Code:02543
Country:United States
Investigator 2: 
First Name:Edward
Last Name:Rastetter
Organization:Ecosystems Center at the Marine Biological Laboratory
Address line 2:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:United States
Investigator 3: 
First Name:Mathew
Last Name:Williams
Organization:University of Edinburgh
Address line 2:School of Geosciences
City:Edinburgh
State:
Zip Code:EH9 EJU
Country:United Kingdom
Investigator 4: 
First Name:James
Last Name:Laundre
Organization:Ecosystems Center at the Marine Biological Laboratory
Address line 2:7 MBL Street
Address line 3:
City:Woods Hole
Zip Code:02543
Country:United States
Investigator 5: 
First Name:Laura
Last Name:van der Pol
Organization:Ecosystems Center at the Marine Biological Laboratory
Address line 2:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:United States
Associate Investigators:
Keywords:photosynthesis, shrub canopy, chamber flux measurement, point frame, global positioning systems, latitude, longitude
Abstract:"2012_GS_PFandCH_GPS" contains GPS locations of all datalogger, 1m x 1m chamber flux and point frame plots sampled IVO Toolik Field Station in Alaska during the summer of 2012. The sorting variables (YEAR, DATE, SITE, GROUP, PLOT, TREAT, PLOT SIZE) are identical to those in other files with data collected that season. The main purpose of this file is for reference and as an aid in interpretation of data analyses and among-site comparisons.
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.10138&urlTail=terrest/tracegas/data/2012_GS_PFandCH_GPS.csv
Data File Name 2012_GS_PFandCH_GPS
Beginning Date 6/23/2012
End Date 8/7/2012
Number of Data Records 43
Other Files to Reference 2012_GS_ITEX_BF3_DiffuseLightData; 012_GS_ITEX_CH_SoilData; 2012_GS_ITEX_CHFluxData; 2012_GS_ITEX_LC_ParameterSummary; 2012_GS_ITEX_MaxCanopyHeight; 2012_GS_ITEX_PercentCover; 2012_GS_ITEX_CHN_Data; 2012_GS_ITEX_PF_LAISummary; 2012_GS_ITEX_RawPinDrop_Data; 2012_GS_ITEX_ShootACiData; 2012_GS_ITEX_ShootHarvestData; 2012_GS_ITEX_ShrubCanopy_DailyLogger; 2012_GS_ITEX_InstantLogger; 2012_GS_ITEX_SunScan_LAI; 2012_GS_ITEX_SunScan_PAR; 2012_GS_PFandCH_GPS; 2012_GS_ITEX_PF_ShootLightCurve; 2003-2004gsfluxleafN; 2003-2009gscurveparameters; 2003-2009gsflux; 2003-2009gsGPSandveg; 2003-2009gsharvestLAI-N; 2003-2009gsspecieslist; 2004-2009gscoverft; 2004-2009gscoversp;
Availability Status 1
Quality Control Information
Maintenance Description This was a season-long project, though it followed similar methods to ITEX projects performed starting in 2003 that are likely to be replicated in the future for reasearch at the Toolik Field Station, AK.
Log of Changes: Version 2: Discrepancy with file name fixed. Missing values changed to #N/A. CH 28Jan2013
Version 3: Metadata updated to newer form (with sites sheet). CH April 2013.
Version 4: Corrected eml excel file name wrong extension. JimL 16May13
Version 5: Corrected Distrubution URL. It had xlsfiles in the path. Jim L 19Jun14
 
RESEARCH LOCATION:                  
Location Name LTER Shrub Block 1 LTER Shrub Block 2 Toolik Field Station Lab 2 Toolik Field Station Gate 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 Upland site; co-located in Block 1 of the Shrub LTER sites; IVO 68 38'18.8" N, 149 34' 07.2" W +/- 50m. Except for plots marked "FERT", plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. Outlet site; co-located in Block 2 of the Shrub LTER sites; IVO 68 38'008.1" N, 149 35' 017.1" W +/- 50m. Except for plots marked "FERT", plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. Lab2; used briefly as a location for the beam fraction sensor (BF3) to autolog. This site is located on the shore of Toolik Lake behind the Lab 2 building. It was chosen for convenient access, though ultimately was changed because of the prevalence of nearby structures. Toolik Gate; this was the preferred logging location for the beam fraction sensor (BF3). This site was located just up the road from the entrance to the field station. It was chosen for the complete absence of nearby structures and the ease of access. 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 68.6385555555555 68.6355833333333 68.6271861111111 68.6272416666666 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.568666666666 -149.588083333333 -149.598469444444 -149.585425 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 747 m 730 m 720 m 743 m 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          
                   
 
TAXONOMIC COVERAGE:
Organisms studied Betula nana; Salix pulchra; Salix glauca
 
Methods:For the point frame (PF) and chamber flux (CH) measurements, GPS coordinates were measured with a handheld Garmin Etrex GPS unit while tracking at least five satellites.

Elevation for all sites was estimated from GoogleEarth; where position measurements were not recorded in the field, such as with the sites of dataloggers and monitoring sites, the position was also estimated from GoogleEarth maps.

Datalogger Sites - PAR and Relative Humidity
In order to monitor canopy conditions of the shrub species of interest--Betula nana and Salix pulchra--two CR1000 dataloggers (Campbell Scientific, 815 W. 1800, North Logan, UT, USA) were installed at the sites used for the ITEX shrub canopy studies at Toolik Field Station in Alaska the summer of 2012. The sites (see "Group" category) are labeled as "Upland" and "Outlet"--descriptions of the sample site in relation to Toolik Lake. The Upland site is colocated with Block 1 of the LTER shrub vegetation plots; the Outlet site is colocated with Block 2. The dataloggers were adjacent to, rather than within, LTER plots with the exception of B2BET which was located within the control (CT) plot of the LTER Shrub Block 2.

The following sensors were located at each datalogger site [B1BET, B1SALP, B2BET, B2SALP]:
PAR (LI-190SB Quantum Sensor):
(1) Mid-way within the canopy (approximately 40 cm above the soil)
(1) Below the canopy (approximately 10 cm above the soil)
Relative humidity (RH) and temperature sensors: HMP50/HMP60 Probe :
(1) Below the canopy (approximately 10 cm above the soil)

BF3 Data Logging
Whenever possible, the beam fraction sensor (BF3 sensor, manufactured by Delta-T Devices Ltd, Burwell Cambridge, UK) was programmed to log total and diffuse irradiance every five minutes on a CR800 datalogger (Campbell Scientific, 815 W. 1800, North Logan, UT, USA). The site initially chosen for this was behind a laboratory near Toolik Lake; this site was called "Lab2". While at least 10 meters from the nearest structure, it was thought that the proximity of the lab buildings might influence or even shade the BF3 sensor at low sun angles. Thus a second site was chosen--"Toolik Gate". This site is located at the entrance to the gravel pad of Toolik Field Station and had no nearby structures that could interfere with the BF3 readings.

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   #N/A=Missing or Not Measured
SITE Toolik Field Station (TFS) text      
GROUP Measurement location in relation to Toolik Lake LTER Shrub plots; In vicinity of Block1 =Upland, IVO Block 2 =Outlet; for BF3 logging locations, location describes place at TFS text      
PLOT Individual plot identifier for PF and CH plots; for datalogger canopies, ID based on LTER block (1 or 2) + SPP text       #N/A=Missing or Not Measured
TREATMENT none or fertilized (FERT - Fertilized with 10g N + 5g P per square meter. N is in form of NH4NO3 annually) text     #N/A=Missing or Not Measured
PLOT SIZE 1m x 1m chamber and point frame size text       #N/A=Missing or Not Measured
N LAT latitude - decimal degrees north number degree     #N/A=Missing or Not Measured
W LONG longitude - decimal degrees west number degree     #N/A=Missing or Not Measured
ELEVATION elevation above sea level number meter     #N/A=Missing or Not Measured
DOM VEG Dominant canopy vegetation text       #N/A=Missing or Not Measured
LAT/LONG ACCURACY GPS accuracy when measurement was taken number meter     #N/A=Missing or Not Measured
MEASUREMENT Distinguishes chamber flux (CH), point frame (PF), anddatalogger measurements text        
NOTES additional comments text        

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