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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.
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|Dataset URLs:||METADATA: HTML, Rich Text, XML(EML compliant) |
DATA: Comma Delimited, Excel file with Metadata and data
|Dataset Title:||Hourly weather data from Toolik Field Station, ARC LTER, Alaska for 1993.|
|Investigator 1:|| |
|Organization:||Marine Biological Lab|
|Address line 2:||Ecosystems Center|
|Address line 3:||7 MBL St|
|Investigator 2:|| |
|Organization:||Marine Biological Lab|
|Address line 2:||Ecosystems Center|
|Address line 3:||7 MBL St|
|Keywords:||weather, temperature, radiation, wind, relative humidity|
|Abstract:||Hourly weather data from the Arctic Tundra LTER site at Toolik Lake. The following parameters are measured every minute and averaged or totaled every hour; 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|
|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: http://ecosystems.mbl.edu/ARC/
|DATA FILE INFORMATION:|
|Data File URL||http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1521&urlTail=weather/tl/data/93dltlh.csv|
|Data File Name||93dltlh.dat|
|Number of Data Records||8760|
|Other Files to Reference|
|Quality Control Information|
|Log of Changes:||Log of changes: 03Octt94 Compiled data into one .DAT file, adding the data from mid August to December. Updated the documentation file. Jim Laundre. 6DEC99 Change date and year to 1993. Check and estimated missing data. JL For Archival Use: DATE RECEIVED: June 1993 DATA FILE ENTERED BY: Jim Laundre DATA FILE VALIDATION: NAME:Jim Laundre DATE:03 Oct 94|
|Version 3: Metadata updated to newer form (with sites sheet). Units updated to current standards. Discrepancy with variable names fixed. CH April 2013.|
|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||68.628228973||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|
Weather data has been collected at Toolik Lake (68 degrees 38'N, 149 degrees 36'W) 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 93DLTLH.DAT, the three hourly data are in 93DLTLO.DAT, and daily summaries are in 93DLTLD.DAT. Data in the field are stored on a Campbell SM716 storage module (capacity of 358,000 data points ). In the summer a direct line from the datalogger to a computer allows data to be viewed and collected daily. 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 93DLTDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA.
Notes: Wind Speed less than .447 is considered calm. Lake quantum stopped working in winter 1991. Quantum has an offset of -2.4. The data are not corrected.
Data are missing for the following periods:
93014 to 93166 - Top tower blew off; 5 Meter - Temp, RH, Wind direction and Wind speed are no good. And it also caused the 1 meter Temp, RH to be erratic from 93130-93166. Soil temperature for set 2 were out of range during the winter.
Missing data for air temperature and rain were estimated when possible. For small gaps the in the hourly data before and after were averaged. For larger gaps regressions were made with the either Toolik Tussock site or Imnaviat data set (a weather station maintained by Hinzman and Kane, Water Research Center, University of Alaska Fairbanks, Fairbanks, AK 99775-5860, which is about 12 kilometers to the east and 200 meters higher).
Reference Citations: Buck, A.L.. 1981 New equations for computing vapor pressure and enhancement factor. Journal of Applied Meteorology 20:1527-1532.
DAYS : JULIAN + (HOUR/2400)
VAPOR PRESS 5M:
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))
TOTAL J CM2 HR: PYRANOMETER * 0.3600 jcm2 * 1000 Watt/Kwatt
Imnavait data collected by Larry Hinzman and Doug Kane
Water Research Center; University of Alaska Fairbanks
Fairbanks, AK 99775-5860
|Variable Name||Variable Description||Data Type||Units||DateTime Format||Code Information||Missing Value Code|
|YEAR||Year in yyyy||datetime||yyyy|
|DATE||Date of collection||datetime||dd-mmm-yyyy|
|MONTH||Month of collection||datetime||mm|
|DAYS||Julian plus fraction of day||datetime||ddd.dd|
|ID||Datalogger program step.||number||number||#N/A=Missing or Not Measured|
|HOUR||Time in Alaska standard time||datetime||hhmm|
|RAIN||Rainfall||number||millimeter||#N/A=Missing or Not Measured|
|PYRANOMETER||Global solar radiation (Sun + sky radiation(LI-200SB)) kilowatts/m2/s||number||kilowattPerMeterSquaredPerSecond||#N/A=Missing or Not Measured|
|LAKE QUANTUM||QUANTUM Lake quantum sensor||number||micromolePerMeterSquaredPerSecond||#N/A=Missing or Not Measured|
|QUANTUM||Quantum sensor||number||micromolePerMeterSquaredPerSecond||#N/A=Missing or Not Measured|
|AIR TEMP 1M||Air temp at 1 meters in||number||celsius||#N/A=Missing or Not Measured|
|AIR TEMP 5M||Air temp at 5 meters in||number||celsius||#N/A=Missing or Not Measured|
|RH 1M||Relative humidity at 1 meters percent||number||percent||#N/A=Missing or Not Measured|
|RH 5M||Relative humidity at 5 meters percent||number||percent||#N/A=Missing or Not Measured|
|BAROMETER||Barometer readings mmHg||number||millimeter||#N/A=Missing or Not Measured|
|WIND SP 1M||Wind Speed at 1 meters||number||meterPerSecond||#N/A=Missing or Not Measured|
|AIR TC 1M||Air temp at 1 meter, (thermocouple) Celsius||number||celsius||#N/A=Missing or Not Measured|
|AIR TC 5M||Air temp at 5 meter, (thermocouple) Celsius||number||celsius||#N/A=Missing or Not Measured|
|WIND SP 5M||Wind Speed at 5 meters in||number||meterPerSecond||#N/A=Missing or Not Measured|
|WIND MAG 5M||Wind vector magnitude at 5m||number||meterPerSecond||#N/A=Missing or Not Measured|
|WIND DIR 5M||Wind direction at 5 meters||number||degree||#N/A=Missing or Not Measured|
|WIND STD 5M||Wind direction standard deviation at 5 meters||number||degree||#N/A=Missing or Not Measured|
|VAPOR PRESS 5M||millibars||number||millibar||#N/A=Missing or Not Measured|
|PYR J CM2 HR||Total joules per sq cm integrated over an hour||number||joulePerCentimeterSquaredPerHour||#N/A=Missing or Not Measured|
|WIND SECTOR||Compass direction of WIND DIR 5M 45 degree sectors||text|
|NET RAD||Net radiation||number||kilowattPerMeterSquared||#N/A=Missing or Not Measured|
|DATE Stowaway||The date and hour of the stowaway logger. dmm/dd/yy hr:mm.||datetime||mmm-dd-yyyy hh:mm|
|Stowaway 1M||Air temperature measured with a Stowaway logger at 1 meter in the same radiation shield. Celsius||number||celsius||#N/A=Missing or Not Measured|
|COMMENTS||Comments on individual data points||text|
|Imnavait AIR 10M||Air temperature 10 meter from Imnavait basin(68o37'N 149o17'W)||number||celsius||#N/A=Missing or Not Measured|
|Imnavait AIR 2M||Air temperature 5 meter from Imnavait basin(68o37'N 149o17'W)||number||celsius||#N/A=Missing or Not Measured|
|Imnavait AIR 1M||Air temperature 1 meter from Imnavait basin(68o37'N 149o17'W)||number||celsius||#N/A=Missing or Not Measured|