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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:89dlsgh1
Dataset Title:Arctic LTER 1989: Weather data from the Campbell CR21 data logger placed on the Sag River Heath site between 27 MAY 89 to 4 SEP 89.
Investigator 1: 
First Name:GUS
Last Name:SHAVER
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:JIM LAUNDRE
Keywords:weather, temperature, radiation, wind, relative humidity
Abstract: Weather data from the Campbell CR21 data logger placed on the Sag River Heath site between 27 MAY 89 to 4 SEP 89.
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 Name 89dlsgh1
Beginning Date 5/1/1989
End Date 9/1/1989
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Log of changes: NOTES: 11Jan90 Created this file from tape dump files: sag8901.prn and sag89mem.prn. The file sag89mem.prn is a dump of the data logger memory when the station was taken down on 4Sep89. It is in final storage format. Part of August is duplicated. Deleted totalized quantum since it exceeded the number of stored digits. Changed 0 hour to 2400 and subtracted 1 from julian day so value for that hour are not assigned to the next day. Jim L 12Feb90 Added VAPOR PRESS and PYR TOTAL JOULES CM2 HOUR. Changed negative pyranomtere values to 0. Deleted totals for radiations since they are redundant. (total = avgs*12 readings) JL For Archival Use: DATE RECEIVED: Apr90 DATA FILE ENTERED BY: Julie Pallant DATA FILE VALIDATION: NAME: Julie Pallant DATE: 3Oct91
RESEARCH LOCATION:
Geographic Description Sag River
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude
Longitude
TAXONOMIC COVERAGE:
Organisms studied
Methods:

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:

TEMPERATURE AND RELATIVE HUMIDITY:
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.
WIND DIRECTION:
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.
WIND SPEED:
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.
PYRANOMEETER:
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%.
QUANTUM:
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.
RAIN GAUGE:
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 at 1 meter sensor was never installed. WInd speed less than .447 is considered calm.

Sampling Description.

None

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
NET RAD:        Net radiation            kilowatts m-2
AIR TEMP 1M:    Air temperaure at 1 meter     Celsius
AIR TEMP 5M:    Air temperature at 5 meters   Celsius
RH 1M:          Relative humidity at 1 meter  percent
RH 5M:          Relative humidity at 5 meters percent
VAPOR PRESS 5M: Vapor pressure at 5 meters    millibars
WIND SP 5M:     Wind speed at 5 meters         m/s
WIND MAG 5M:    Wind vector magnitude at 5 meters m/s
WIND DIR 5M:    Wind vector direction at 5 meters
WIND DIR STD 5M:Wind vector direction standard deviation at 5 m
DAYS:           Julian day plus fraction of day
MONTH:          Month in integer form
PY TOTAL J CM2 HOUR:   Total joules/cm2 over an hour
(12) CALCULATIONS
Variable        Formula
DAYS :        JULIAN + (HOUR/2400)
VAPOR PRESS 5M:  (RH 5M/100)*6.1121*exp(17.368 * AIR TEMP 5M/(238.88 +
AIR TEMP 5M))
PY TOTAL J CM2 HOUR:  PYRANOMETER * .3600 jcm2 * 1000 watt/Kwatt

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