LTER network Toolik Field Station MBLhome page

Sun and Moon

Toolik Weather Graphs

Arctic LTER Weather Stations

Toolik Webcam

Animated Gif of yesterday's Webcam

Arctic LTER Inhouse login

  Our web site has beed moved. Please update your bookmarks for the new site.

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 

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.


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:TRTK_GT01dot01_MET
Dataset Title:Meteorological data near thermokarst sites around Toolik Lake Field Station, Summer 2009-Summer 2012
Investigator 1: 
First Name:Michael
Last Name:Gooseff
Organization:Colorado State University
Address line 2:Department of Civil and Environmental Engineering
Address line 3:
City:Fort Collins
Zip Code:80523
Investigator 2: 
First Name:Sarah
Last Name:Godsey
Organization:Idaho State University
Address line 2:Department of Geosciences
Zip Code:83209
Associate Investigators:
Keywords:ARCSS/TK, ground temperature, retrogressive thaw slump, thermokarst, Toolik Field Station
Abstract:GroMeteorological parameters were measured hourly adjacent to thermokarst features in the region around Toolik Field Station. Pressure, rainfall, wind speed and direction, solar radiation, air temperature and relative humidity were all measured at 1-3m above the ground surface with an Onset U30 weather station connected to all sensors.
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
Online URL:
Data File URL
Data File Name 20092012_MET_TRTK_GT01dot01
Beginning Date 6/25/2009
End Date 8/5/2012
Number of Data Records 27283
Other Files to Reference
Availability Status Type 1
Quality Control Information Gaps have been filled when an interpolation is possible. Outliers have been filtered as stated in the notes.
Maintenance Description Data was maintained by the Gooseff lab during 2009-2012. Some data continues to be collected, please contact the lab for updates.
Log of Changes:
Location Name TRTK_GT01dot01 Select Site or enter New One  
Geographic Description Toolik River MET station Enter Description  
Location Bounding Box      
West Bounding Coordinate      
East Bounding Coordinate      
North Bounding Coordinate      
South Bounding Coordinate      
OR if single point location      
Latitude 68.6914 In Decimal Degrees  
Longitude 149.2074 In Decimal Degrees  
Elevation In Meters In Meters  
Link to Google Map View on Google Map    
Organisms studied
Methods:All weather parameters were measured hourly using Onset sensors attached to a Hobo U30 datalogger. The tipping bucket rain gage is unheated and thus gives only an estimate of liquid precipitation. The anemometer was placed at 3m at the top of the tower, with solar radiation and the rain gage immediately below the anemometer arm. Temperature and relatively humidity were measured within a ventilated shield. Pressure was measured within the datalogger unit.

At the Toolik River and I-minus-2 gulley thermokarsts, sites were adjacent to the top of the thermokarst feature and analogous measurements were made. In order to coordinate with the ARCSS/TK team measurements at TRTK, measurements in the summer period were taken at 5-min intervals in 2009-2011: cumulative (rainfall) or average (all other parameters) hourly values are reported here based on those 5-min data.

Note that Water Content sensors are not calibrated and data may not be accurate, but are useful for investigating gross wetting and drying patterns.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site ID Code to describe location of site at particular thermokarst Text        
Year Year that the measurement was taken datetime   YYYY    
Month Month that the measurement was taken (1=Jan through 12=Dec) Number number      
Day Day of the month that the measurement was taken Number number      
Hour Hour (0-23 h) that the measurement was taken Number number      
Minute Minute that the measurement was taken Number number      
Second Second that the measurement was taken Number number      
AirT Temperature of the air at 1m above the ground surface Number celsius     -99999=Missing or Not Measured
Pressure Air pressure at 1m above the ground surface Number millibar     -99999=Missing or Not Measured
Rain Liquid precipitation in the tipping bucket gage Number millimeter     -99999=Missing or Not Measured
PAR Photosynthetically active radiation Number microEinsteinPerMeterSquaredPerSecond     -99999=Missing or Not Measured
WindSpeed Hourly average wind speed at 3 m above the ground surface Number meterPerSecond     -99999=Missing or Not Measured
GustSpeed Peak 1-min gust speed at 3 m above the ground surface Number meterPerSecond     -99999=Missing or Not Measured
WindDirection Hourly average wind direction at 3 m above the ground surface Number degree     -99999=Missing or Not Measured
Solar Radiation Incoming solar radiation flux at ~2m above the ground surface Number wattPerMeterSquared     -99999=Missing or Not Measured
RH Relative humidity at 1 m above the ground surface Number percent     -99999=Missing or Not Measured
0cmWC Water Content at 0 cm depth in soil Number meterCubedPerMeterCubed     -99999=Missing or Not Measured
20cmWC Water Content at 20 cm depth in soil Number meterCubedPerMeterCubed     -99999=Missing or Not Measured
38cmWC Water Content at 38 cm depth in soil Number meterCubedPerMeterCubed     -99999=Missing or Not Measured
Notes Information about gap filling, interpolation or missing data Text        
Please contact with questions, comments, or for technical assistance regarding this web site.