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Arctic LTER Database

Arctic LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Older Metadata: Attribute table not in XML (EML) file

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:91dlsgo1
Dataset Title:Arctic LTER 1991: Weather data from the Campbell CR21 data logger placed on the Sag River Heath site during the summer of 1991.
Investigator 1: 
First Name:GUS
Last Name:SHAVER
Address line 1:
Address line 2:
Address line 3:
Zip Code:
Associate Investigators:JIM LAUNDRE, JULIE PALLANT
Keywords:weather, temperature, radiation, wind, relative humidity
Abstract: Weather data from the Campbell CR21 data logger placed on the Sag River Heath site during the summer of 1991.
Contact: Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Online URL:
Data File Name 91dlsgo1
Beginning Date 5/1/1991
End Date 9/1/1991
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Log of changes: For Archival Use: DATE RECEIVED: Sep91 DATA FILE ENTERED BY: Julie Pallant DATA FILE VALIDATION: NAME:Julie Pallant DATE: 30Sep91
Geographic Description Near the Sagavanirktok River (68 degrees 46?N, 148 degrees 52?W, elevation 470 m) northern foothills of Brook Range, Alaska, U.S.A.
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Organisms studied

In the summer of 1987 a weather station was placed on an old floodplain terrace about 200 m from the Sagavanirktok River. The site is vegetated by dwarf shrubs of Ericads and Betula. Initially the station was operational from late May/early June through August. In 1993 the station became year round.
Sensors include:

Campbell Scientific, Model 207 Temperature and Relative Humidity Probe. Temperature sensor is a Fenwall electronics thermistor and the Relative Humidity sensor is a Phys-chemical Research sensor. Specs: Temp: Accuracy over the range -40 to 56C is 1.0C. RH: for a range of 12 - 100% the percentage error is 3. Upper temperature limit is 79C.
MET-ONE, (supplied by Campbell Scientific) Wind direction use a light weight, air foil vane and a potentiometer to produce an output that varies proportional with wind direction. Specs: Minimum Wind speed to get accurate reading = 1.0 mph. Accuracy 5 Temperature range -50 to 70C.
MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A. Sensor uses a 3-cup anemometer assembly and simple magnet-read switch assembly to produce a series of contact closures whose frequency is proportional to wind speed. Specs: Operating Range - 0 to 125 mph or 0-60 m/s. Accuracy 1.5% or 0.25 mph. Working temperature range -50 to 85C.
Li-Cor, Pyranometer: Model LI-200SB- Pyranometer is calibrated to detect most the daylight spectrum (sunlight and PAR). Specs: Sensitivity - 80mA per 1000 Watts m-2. Absolute error max 5% but typically 3%.
Li-Cor, Quantum. Model LI-190SB. Quantum measure photosynthetically active radiation (PAR) in mEinsteins S-1 m-2. Specs: range 400-700nm wavelength. Sensitivity 8mA/1000 mE s-1 m-2. Relative error less then 10% for plant canopies or less then 5% for growth chambers.
Texas Electronics, Inc. (supplied by Campbell Scientific) Tipping Bucket Electric Rain Gauge. A complex spun collector funnel with a knife edge that diverts the water to a tipping bucket mechanism. For each tip a magnet causes an electronic pulse that is recorded. Each alternate tip occurs for each 0.01 inch of rainfall. Specs: Accuracy 1% at 2 inches/hr or less. Accurate Temperature Range: 0 - 37C.

Notes: Wind speed less than .447 is considered calm.

Sampling Description.


Data Table

Variable    Variable descrip.            Precis./Units  Coded   Missing
(Y/N)    Values
SITE            site of measurement          y
ID:             Program step that output the data
JULIAN:         Julian date                 yyddd
HOUR:           Time - Alaska standard time 2400
DATE:           Date                      dd-mmm-yy
RAIN:           Rainfall                     mm
PYRANOMETER:    Pyranometer facing up    kilowatts m-2
QUANTUM:        Quantum              microeinsteins m-2 sec-1
AIR TEMP 5M:    Air temperature at 5 meters   Celsius
RH 5M:          Relative humidity at 5 meters percent
SOIL TEMP SURF: soil temp (thermister) surface  Celsius
SOIL TEMP 20:   soil temp (thermister) 20cm     Celsius
SOIL TEMP 50:   soil temp (thermister) 50cm     celsius
MOIST SURF:     soil moisture surface
MOIST 20:       soil moisture 20cm
MOIST 50:       soil moisture 50cm
BATTERY:        Battery voltage               Volts          n
WIND SPEED:     Wind speed at 5 meters         m/s
WIND VEC MAG:   Wind vector magnitude at 5 meters m/s
WIND VEC DIR:   Wind vector direction at 5 meters
STD DEV DIR:    Wind vector direction standard deviation at 5 m
DAYS:           Julian day plus fraction of day
Variable        Formula
DAYS :        JULIAN + (HOUR/2400)

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