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 ID:	1988_currentTFSDaily.05
Dataset Title:	A multi-year DAILY weather file for the Toolik Field Station at Toolik Lake, AK starting 1988 to present.
Investigator 1:
First Name:	Gus
Last Name:	Shaver
Organization:	Marine Biological Lab
Address line 2:	Ecosystem Center
Address line 3:	7 MBL St.
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Investigator 2:
First Name:	Jim
Last Name:	Laundre
Organization:	Marine Biological Lab
Address line 2:	Ecosystem Center
Address line 3:	7 MBL St.
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Associate Investigators:
Keywords:	weather, temperature, radiation, wind, relative humidity
Abstract:	A multi-year DAILY weather file for the Arctic Tundra LTER site at Toolik Lake, AK. Included are daily averages and/or maximums and minimums of air, wind speed, soil temperature, and sum of global radiation and precipitation.
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.1489&urlTail=weather/tl/data/1988_currentTFSDaily.csv
Data File Name	1988_currentTFSDaily.data
Beginning Date	6/1/1988
End Date	12/31/2008
Number of Data Records	7519
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	10 May07 entered the metadata in the excel meatadata sheet. Checked data and documentation. Data now are through end of 2006. Jiml
	Version 3: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	version4: Added 2007 and 2007 data Jim L Apr2010
	Version 5: Metadata updated to newer form (with sites sheet). Units updated to current standards. CH April 2013.

RESEARCH LOCATION:
Location Name	TFS Weather Station	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	University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska	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	68.628	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Longitude	-149.593	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Elevation	726.5	In Meters	In Meters	In Meters	In Meters	In Meters	In Meters	In Meters
Link to Google Map	View on Google Map

TAXONOMIC COVERAGE:
Organisms studied
Methods:	Experimental Design/Sampling Description: Daily data from the Arctic LTER Toolik Field Station weather station. Where possible two nearby stations were used to fill in missing data using regressions to estimate the missing values. The Arctic LTER tussock station is 700 meters away and has the best regression fit. The Imnavait weather station is 12 kilometers away and 200 meters higher. There are good summer air temp regressions with Toolik but during the winter months the variability is greater (Larry Hinzman and Doug Kane Water Research Center; University of Alaska Fairbanks; Fairbanks, AK 99775-5860). From 1989 to 1998 summer only precipitation was collected at Toolik. Winter precipitation data from the Natural Resources Conservation Service (NRCS) Alaska Imnavait weather station was used to fill in the winter data. This precipitation gage has a Wyoming windshield installed. In fall of 1998 year round precipitation at Toolik was started. Weather data has been collected at Toolik Lake by the Arctic LTER since June 1988. Sensors that are measured every minute and averaged or totaled every hour include: air temperature and relative humidity at 1 and 5 meters, wind speed at 1 and 5 meters, wind direction at 5 meters, global solar radiation, photosynthetically active radiation, barometric pressure, and unfrozen precipitation. Sensors measured every 10 minutes and averaged every three hours include: soil temperatures, lake temperature, lake depth, and evaporation pan depth and pan water temperature. In the fall of 1998 a Campbell CS705 Snowfall adapter was added for snowfall measurements. In 1999 a Wyoming windshield was added 30Aug99. In August 2006 a OTT Pluvio Precipitation Gauge. (Standard with a heating ring. Resolution: 0.01/0.1; Collecting area 200 cm2; Total quantity 250 mm) replaced the tipping rain gauge/CS705 adapter. See http://ecosystems.mbl.edu/ARC/weather/sensors.html for a description of the sensors used. Notes and Comments: Wind Speeds less than .447 are considered calm. For the global solar radiation and photosynthetically active radiation sensors no attempt is made to correct for frost or snow on the sensors during the winter months. Therefore winter radiation data should be view as suspect and used only qualitatively. See additional notes under Comments variable.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Year	Year yyyy	datetime		yyyy
Month	Month of collection integer	datetime		mm
!LTER_Site	Three letter Long term Ecological Research site code For the arctic tundra --ARC	text
Station	Name of Arctic weather station	text
Date	Date yyyymmdd	datetime		yyyymmdd
Daily_AirTemp_Mean_C	Daily average Air temperature at 5meters Celsius	number	celsius			#N/A=Missing or Not Measured
Flag_Daily_AirTemp_Mean_C	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Daily_AirTemp_AbsMax_C	Maximum air temperature at 5 meter Celsius	number	celsius			#N/A=Missing or Not Measured
Flag_Daily_AirTemp_AbsMax_C	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Daily_AirTemp_AbsMin_C	Minimum air temperature at 5 meters Celsius	number	celsius			#N/A=Missing or Not Measured
Flag_Daily_AirTemp_AbsMin_C	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Daily_Precip_Total_mm	Total daily precipitation mm	number	millimeter			#N/A=Missing or Not Measured
Flag_Daily_Precip_Total_mm	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Daily_windsp_mean_msec	Daily average wind speed at 5 meter meters/sec	number	meterPerSecond			#N/A=Missing or Not Measured
FLAG_Daily_windsp_mean_msec	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Daily_Windspeed_AbsMax_m_s	Wind Speed Maximum at 5 meter meters/sec	number	meterPerSecond			#N/A=Missing or Not Measured
Daily_globalrad_total_jcm2	Total joules per sq cm per day joules/cm2/day	number	joulePerCentimeterSquaredPerDay			#N/A=Missing or Not Measured
FLAG_Daily_globalrad_total_mjm2	Flag variable - E indicates an estimated value;. See comment variable.	text				#N/A=Missing or Not Measured
Moss	Avg. Soil moss layer temperature - Celsius	number	celsius			#N/A=Missing or Not Measured
Soil20cm	Avg. Soil temperature at 20 cm Celsius	number	celsius			#N/A=Missing or Not Measured
Comments	Notes on data	text				#N/A=Missing or Not Measured
	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.