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:	97dltld.3
Dataset Title:	Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1997.
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 data file for Arctic Tundra LTER site at Toolik Lake. 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 unfrozen 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.1532&urlTail=weather/tl/data/97dltld.csv
Data File Name	97dltld.dat
Beginning Date	5/1/1997
End Date	9/1/1997
Number of Data Records	365
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: 10Sept97 Rechecked values 6Dec99 Updated date and year to four digits. Changed variable names to the unified names and order. JL For Archival Use: DATE RECEIVED: Aug1997, Jun1997 DATA FILE ENTERED BY: Jim Laundre DATA FILE VALIDATION: NAME:Jim Laundre 03 Sept 1997
	Version 3: Metadata updated to newer form (with sites sheet). Units updated to current standards. Discrepancy with variable names fixed. 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 (68 degrees 38'N, 149 degrees 36'W)	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	68.628228973	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Longitude	-149.596001285	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:	Weather data has been collected at Toolik Lake by a Campbell 21x datalogger 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, net radiation (Fritschen type), 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. Net radiation and pan evaporation are only measured during the summer months. The hourly data are in the file 97DLTLH.DAT, the three hourly data are in 97DLTLO.DAT, and daily summaries are in 97DLTLD.DAT. A second Campbell 21x datalogger 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 full description of the sensors and site is in file SENSORS.DOC. The original data is in file 97DLTDAT.ZIP, which is archived at The Marine Biological Lab, Woods Hole, MA. Notes: Wind speed less than .447 is considered calm. Radiation data was not totaled for the winter months since no attempt was made to keep sensors snow and frost free. Lake temperature is measured near the lake depth sensor. Therefore the lake depth measurements give the depth at which lake temperature is measured. Data was lost from 168 to 176 when logger memory filled. Late August soil profile #1 at 50 and 100 cm could not be reset. They were put in at 20 cm shallower. Using set 2 for daily temperature. Sampling Description. VAPOR PRESS 5M: Daily average of the following hourly calculation. If Air Temp > 0 then (RH 5M/100) * 6.1121 * exp(17.368 * AIR TEMP 5M/(238.88 + AIR TEMP 5M)) If Air Temp < 0 then (RH 5M/100) * 6.1121 * exp(17.966 * AIR TEMP 5M/(238.88 + AIR TEMP 5M)) (Buck 1981). PYR J CM2 : Daily sum of PYRANOMETER * 0.3600 jcm2 * 1000 Watt/Kwatt QUANTUM Mol/m2: (Daily sum of Quantum)60sec60 min* 10^-6 umol/mol

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
YEAR	Year in yyyy	text
DATE	Date	datetime		dd-mmm-yyyy
Month	Month of collection	datetime		mmm
ID	Datalogger program step.	number	number			#N/A=Missing or Not Measured
JULIAN	Julian date	datetime		ddd
Rain	Total daily rain	number	millimeter			#N/A=Missing or Not Measured
AT 1M	Daily average Air temperature at 1	number	celsius			#N/A=Missing or Not Measured
AT 5M	Daily average Air temperature at 5	number	celsius			#N/A=Missing or Not Measured
ATMAX 1M	Maximum temperature at 1 meter	number	celsius			#N/A=Missing or Not Measured
ATMAX HR 1M	Time of maximum air temperature at 1 meters 2400	datetime		hhmm		#N/A=Missing or Not Measured
ATMAX 5M	Maximum air temperature at 5 meter	number	celsius			#N/A=Missing or Not Measured
ATMAX HR 5M	Time of maximum air temperature at 5 meters 2400	datetime		hhmm		#N/A=Missing or Not Measured
ATMIN 1M	Minimum air temperature at 1 meter	number	celsius			#N/A=Missing or Not Measured
ATMIN HR 1M	Time of minimum air temperature at 1 meter 2400	datetime		hhmm		#N/A=Missing or Not Measured
ATMIN 5M	Minimum air temperature at 5 meters	number	celsius			#N/A=Missing or Not Measured
ATMIN HR 5M	Time of minimum air temperature at 5 meter 2400	datetime		hhmm		#N/A=Missing or Not Measured
WSMAX 1M	Wind Speed Maximum at 1 meter	number	meterPerSecond			#N/A=Missing or Not Measured
WSMAX HR 1M	Time of wind speed Max at 1M	datetime		hhmm		#N/A=Missing or Not Measured
WSMAX 5M	Wind Speed Maximum at 5 meter	number	meterPerSecond			#N/A=Missing or Not Measured
WSMAX HR 5M	Time of wind speed Max at 5M	datetime		hhmm		#N/A=Missing or Not Measured
WIND SP 1M	Daily average wind speed at 1 meter	number	meterPerSecond			#N/A=Missing or Not Measured
WIND SP 5M	Daily average wind speed at 5 meter	number	meterPerSecond			#N/A=Missing or Not Measured
Vapor Press	Avg. Vapor Pressure at 5 meters	number	millibar			#N/A=Missing or Not Measured
Pyr j/cm2	Total joules per sq cm per day	number	joulePerCentimeterSquaredPerDay			#N/A=Missing or Not Measured
Quantum	Mol/m2/day Photosynthetical Active Radiation	number	molePerMeterSquaredPerDay			#N/A=Missing or Not Measured
Moss2 Temp	Soil moss layer temperature - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 5cm	Soil temperature at 5 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 10cm	Soil temperature at 10 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 20cm	Soil temperature at 20 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 50cm	Soil temperature at 50 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 100cm	Soil temperature at 100 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Soil2 150cm	Soil temperature at 150 cm - set 2	number	celsius			#N/A=Missing or Not Measured
Lake Temp	Lake water temperature at approx. 2 m (see notes) Celsius	number	celsius			#N/A=Missing or Not Measured
Comments	Notes on data	text

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