Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1999.

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.

Project Keywords: 

Data set ID: 

1538

EML revision ID: 

1
Published on EDI/LTER Data Portal

Citation: 

Shaver, G. 2001. Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1999. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/c97e2bb0b819abf0577fda102a6eb09f
People

Owner/Creator: 

Contact: 

Additional People: 

Associated Researcher
Dates

Date Range: 

Saturday, May 1, 1999 to Wednesday, September 1, 1999

Publication Date: 

2001

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, 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 99DLTLH.DAT, the three hourly data are in 99DLTLO.DAT, and daily summaries are in 99DLTLD.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 99DLTDAT.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.

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)*60sec*60 min* 10^-6 umol/mol

Version Changes: 

Log of changes:

For Archival Use:

DATE RECEIVED: Jun 99
DATA FILE ENTERED BY: Jim Laundre
DATA FILE VALIDATION:
NAME:Jim Laundre
14OCT99
Version 3: Metadata updated to newer form (with sites sheet). Units updated to current standards. Discrepancy with variable names fixed. CH April 2013.
Version 4: Corrected Distrubution URL. It had xlsfiles in the path. Jim L 19Jun14
Version 5: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy

To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

File 99dltld.csv

Daily weather data... File Details

Office spreadsheet icon 99dltld.xls

Excel file with... File Details