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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 

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 via LTER Data Portal
Dataset ID:2011-2013_nb_Sagavanirktok_MET.02
Dataset Title:Daliy weather data from Sagavanirktok River DOT site, in the northern foothills of the Brooks Range, Alaska, May-July 2011-2013.
Investigator 1: 
First Name:Natalie
Last Name:Boelman
Organization:Lamont-Doherty Earth Observatory and Department of Earth and Environmental Sciences,
Address line 2:Columbia University
Address line 3:61 Route 9W
State: NY
Zip Code:10964
Investigator 2: 
First Name:Shannan
Last Name:Sweet
Organization:Lamont-Doherty Earth Observatory and Department of Earth and Environmental Sciences,
Address line 2:Columbia University
Address line 3:61 Route 9W
State: NY
Zip Code:10964
Associate Investigators:
Keywords:Sagavanirktok River, precipitation, relative humidity, air temperature, teambird, Toolik, wind speed, wind direction
Abstract:Daliy weather data from mid May to late July 2011 to 2013 from Sagavanirktok Department of Transport (DOT) site (south of Toolik Field Station and Arctic LTER), in the northern foothills of the Brooks Range, Alaska. Parameters measured include: wind speed, wind directions, temperatrue, humididty, pressure and precipitation. (Rich, et al 2013)
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 2011-2013_nb_Sagavanirktok_MET
Beginning Date 5/12/2011
End Date 7/16/2013
Number of Data Records 214
Other Files to Reference
Availability Status 1
Quality Control Information
Maintenance Description
Log of Changes: Metatdata entered and data reviewed by S.Sweet, uploaded and formatted JD (Dec.2013)
Version 2: Wind speed data was a little wonky (upwards of 120+ mph).  So, the folks we rent our equipment from recalculated the hourly data for us, and I finished calculating the daily averages. S.Sweet May 2014
Location Name Sag River Department of Transportation (SDOT) Select Site or enter New One Select Site or enter New One  
Geographic Description Near the Sagavanirktok River (68 degrees 46’N, 148 degrees 52’W, elevation ~ 500 m) northern foothills of Brook Range, Alaska, U.S.A. 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 68.764564446 In Decimal Degrees In Decimal Degrees  
Longitude -148.90027451 In Decimal Degrees In Decimal Degrees  
Elevation 510.33 In Meters In Meters  
Link to Google Map View on Google Map      
Organisms studied
Methods:In early May through late July of 2011, 2012, and 2013, a weather station was placed on a tripod assembly about 200 m from the Sagavanirktok River. The site is vegetated by dwarf shrubs of Ericads and Betula. All sensors were ~ 3 meters off the ground.

Sensor information:
Sensors are rented from Sanchez Industrial Design, Inc., and are EcoEARS data loggers with Vaisala Weather Transmitters WXT520 (Helsinki, Finland).

Pressure: WXT520 capacitive silicon BAROCAP® sensor; range 600 ... 1100 hPa; accuracy ±0.5 hPa at 0 ... +30 °C (+32 ... +86 °F) ±1 hPa at -52 ... +60 °C (-60 ... +140 °F); output resolution 0.1 hPa, 10 Pa, 0.001 bar, 0.1 mmHg, 0.01 inHg.
Temperature: WXT520 capacitive ceramic THERMOCAP® sensor; range -52 ... +60 °C (-60 ... +140 °F); accuracy (for sensor element) at +20 °C (+68 °F) ± 0.3 °C; output resolution 0.1 °C (0.1 °F).
Humididty: WXT520 capacitive thin film polymer HUMICAP®180 sensor; range 0 ... 100 %RH; accuracy ±3 %RH at 0 ... 90 %RH; ±5 %RH at 90 ... 100 %RH; output resolution 0.1 %RH.

WXT520 uses Vaisala WINDCAP® sensor technology in wind measurement. The wind sensor has an array of three equally spaced ultrasonic transducers on a horizontal plane. Wind speed and wind directions are determined by measuring the time it takes the ultrasound to travel from each transducer to the other two.
Wind speed: range 0 ... 60 m/s; response time 0.25 s; accuracy ±3 % at 10 m/s; output resolution 0.1 m/s (km/h, mph, knots).
Wind direction: azimuth 0 ... 360°; response time 0.25 s; accuracy ±3.0°; output resolution 1°.

WXT520 uses Vaisala RAINCAP® Sensor 2-technology in precipitation measurement. The precipitation sensor comprises of a steel cover and a piezoelectrical sensor mounted on the bottom surface of the cover. The precipitation sensor detects the impact of individual raindrops. The signals from the impact are proportional to the volume of the drops.
Rainfall: cumulative accumulation after the latest auto or manual reset; collecting area 60 cm2; output resolution 0.01 mm (0.001 in); field accuracy for daily accumulation better than 5 %1, weather dependent.
Rain intensity: running one minute average in 10-second steps; range 0 ... 200 mm/h.

Reference Citations: Rich, M.E., L., Gough, N.T., Boelman. 2013. Arctic arthropod assemblages in habitats of differing shrub dominance. Ecography 36: 001-010.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Research site code from Rich, et al 2013 text        
Year year datetime   yyyy    
Date date datetime   dd-mmm-yy    
Windspeed windspeed at 3 meters number meterPerSecond     N/A=Missing or Not Measured
WindDirection wind direction at 3 meters number degree     N/A=Missing or Not Measured
MaxWindGust daily maximum wind gust at 3 meters number meterPerSecond     N/A=Missing or Not Measured
AirTemp daily average air temperature at 3 meters number celsius     N/A=Missing or Not Measured
RH relative humididty at 3 meters number percent     N/A=Missing or Not Measured
Pressure air pressure at 3 meters number kilopascal     N/A=Missing or Not Measured
Precip total daily precipitation at 3 meters number centimeter     N/A=Missing or Not Measured
AvgPrecipRate average rate of precipitation at 3 meters number centimeterPerHour     N/A=Missing or Not Measured
MinAirTemp daily minimum air temperaature number celsius     N/A=Missing or Not Measured
MaxAirTemp daily maximum air temperaature number celsius     N/A=Missing or Not Measured

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