Arctic LTER

Weather at Toolik

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:	2005dltld.05
Dataset Title:	Daily weather summaries from Toolik Field Station Meteorological Station, Toolik Lake, Alaska for 2005.
Investigator 1:
First Name:	Gus
Last Name:	Shaver
Organization:	Marine Biological Lab
Address line 2:	Ecosystems 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:	Ecosystems Center
Address line 3:	7 MBL St.
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Associate Investigators:
Keywords:	weather, temperature, wind, rain, daily
Abstract:	Daily weather summaries from Toolik Field Station Meteorological Station, Toolik Lake, Alaska. Included are daily averages and/or maximums and minimums of air, soil and lake temperature, wind speed, vapor pressure, and sum of global radiation and precipitation recorded near Toolik Lake.
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.1656&urlTail=weather/tl/data/2005dltld.csv
Data File Name	2005dltld.dat
Beginning Date	1/1/2005
End Date	12/31/2005
Number of Data Records	365
Other Files to Reference
Availability Status	type 1
Quality Control Information
Maintenance Description
Log of Changes:	Jan2007: Checked data and documentation. Data now are through end of year. Jiml
	Ver. 2 Corrected the units on rain - was milliliter, should be millimeter. Jim L Nov 2008.
	Version 3: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 4: Metadata updated to newer form (with sites sheet). Units updated to current standards. CH April 2013.
	Version 5 Formatted hhmm to include leading 0 JimL 21May13

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	68.6283	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Longitude	-149.596	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 AND METHODS: Weather data at Toolik Lake has been collected by the Arctic LTER since June 1988. The station is located about 50 meters south of the lake's edge in a sedge/moss (Tomenthypnum nitens-Carex bigelowii) vegetation. 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 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. Pan evaporation are only measured during the summer months. The hourly data are in the file yyyyDLTLH.DAT, the three hourly data are in yyyyDLTLO.DAT, and daily summaries are in yyyyDLTLD.DAT. A second datalogger, Toolik Moist Acidic Tussock station, about 700 meters from the main weather station logs air and soil temperatures and photosynthetically active radiation in the experimental treatment plots. Treatments include greenhouse, shading, and fertilization. In the control plot wind speed and direction, global solar radiation and unfrozen precipitation are also measured. This station is also used as a backup to the main weather station. The Imnavait weather station, 12 kilometers away and 200 meters higher, is also used to fill in data gaps. Regressions of summer air temperature between Imnavait and with Toolik are good but during the winter months there is greater variability. This station is maintained by Larry Hinzman and Doug Kane, Water Research Center; University of Alaska Fairbanks; Fairbanks, AK 99775-5860. Precipitation data from the Natural Resources Conservation Service (NRCS) Alaska Imnavait weather station is also used to fill in the data gaps. Please contact Rick McClure, Data Collection Officer, Natural Resources Conservation Service, 949 E. 36th Ave., Suite 400,, Anchorage, AK 99508-4362, (907) 271-2424 for more details. The full description of the sensors and site is in file SENSORS.DOC. The original data is in file yyyyDLTDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA. NOTES AND COMMENTS: Wind speed less than .447 is considered calm. Radiation data were not totaled for the winter months since no attempt was made to keep sensors snow and frost-free. Lake temperature is measured at the lake depth sensor. Therefore the lake depth measurements give the depth at which lake temperature is measured. See additional notes under Comments variable. Precipitation measured with a tipping rain gage, fitted with a Campbell CS705 adapter for measuring snow. On 17Aug2006 a OTT Pluvio Precipitation Gauge (Standard with a heating ring. replaced the tipping rain gage. A Wyoming wind shield was build for the

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
DATE	Date data collected	datetime		dd-mmm-yyyy
Month	Month of collection	datetime		mm
ID	Year data collected	number	number
YEAR	Data logger program step	datetime		yyyy
JULIAN	Year data collected	number	number
Rain	Precip (mm). See notes for methods	number	millimeter			#N/A=Missing or Not Measured
AT 1M	Air temp at 1 meters	number	celsius			#N/A=Missing or Not Measured
AT 5M	Air temp at 5 meters	number	celsius			#N/A=Missing or Not Measured
ATMAX 1M	Daily maximum from readings taken every minute for air temperature at 1 meter.	number	celsius			#N/A=Missing or Not Measured
ATMAX HR 1M	The hour at which the maximum occurred.	datetime		hhmm
ATMAX 5M	Daily maximum from readings taken every minute for air temperature at 5 meters.	number	celsius			#N/A=Missing or Not Measured
ATMAX HR 5M	The hour at which the maximum occurred.	datetime		hhmm
ATMIN 1M	Daily minimum from readings taken every minute for air temperature at 1 meter.	number	celsius			#N/A=Missing or Not Measured
ATMIN HR 1M	The hour at which the minimum occurred.	datetime		hhmm		#N/A=Missing or Not Measured
ATMIN 5M	Daily minimum from readings taken every minute for air temperature at 5 meters.	number	celsius			#N/A=Missing or Not Measured
ATMIN HR 5M	The hour at which the minimum occurred.	datetime		hhmm		#N/A=Missing or Not Measured
WSMAX 1M	Maximum wind speed, using the minute reading, at 1 meters using a MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A in meters per second	number	meterPerSecond			#N/A=Missing or Not Measured
WSMAX HR 1M	The hour at which the maximum occurred.	datetime		hhmm		#N/A=Missing or Not Measured
WSMAX 5M	Maximum wind speed, using the minute reading, at 5 meters using a MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A in meter per second.	number	meterPerSecond			#N/A=Missing or Not Measured
WSMAX HR 5M	The hour at which the maximum occurred.	datetime		hhmm		#N/A=Missing or Not Measured
WIND SP 1M	Wind Speed at 1 meters using a MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A in meters per second.	number	meterPerSecond			#N/A=Missing or Not Measured
WIND SP 5M	Wind Speed at 5 meters using a MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A in meters per second.	number	meterPerSecond			#N/A=Missing or Not Measured
Vapor Press	Average daily Vapor Pressure at 5 meters	number	millibar			#N/A=Missing or Not Measured
Pyr j/cm2	Li-Cor, Pyranometer: Model LI-200SA- Sensor measures global solar radiation (sun plus sky). j/cm2/day	number	joulePerCentimeterSquaredPerDay			#N/A=Missing or Not Measured
Pyr w/winter (MJ/m2/day)	Li-Cor, Pyranometer: Model LI-200SA- Sensor measures global solar radiation (sun plus sky). MJ/m2/day Winter months include so values must be used qualitatively since the sensor is not cleared of snow or frost.	number	megaJoulePerMeterSquaredPerDay			#N/A=Missing or Not Measured
Quantum mol/m2/day	Li-Cor, Quantum. Model LI-190SB. Quantum measure photosynthetically active radiation (PAR) in mol m-2 day-1. Specs: range 400-700nm wavelength.	number	molePerMeterSquaredPerDay			#N/A=Missing or Not Measured
Moss1 Celsius	Soil profile 1 moss temperature	number	celsius			#N/A=Missing or Not Measured
Soil1 5cm Celsius	Soil profile 1 temperature 10 cm	number	celsius			#N/A=Missing or Not Measured
Soil1 10cm Celsius	Soil profile 1 temperature 20 cm	number	celsius			#N/A=Missing or Not Measured
Soil1 20cm Celsius	Soil profile 1 temperature 20 cm	number	celsius			#N/A=Missing or Not Measured
Soil1 50cm Celsius	Soil profile 1 temperature 50 cm	number	celsius			#N/A=Missing or Not Measured
Soil1 100cm Celsius	Soil profile 1 temperature 100 cm	number	celsius			#N/A=Missing or Not Measured
Soil1 150cm Celsius	Soil profile 1 temperature 150 cm	number	celsius			#N/A=Missing or Not Measured
Lake Temp Celsius	Lake temperature measure at the depth of the lake depth sensor	number	celsius			#N/A=Missing or Not Measured
Comments	Comments about indicial datum values	text
TC 5M min	Minimum temperature	number	celsius			#N/A=Missing or Not Measured

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