Teller CAS

Location

• N64* 58' 36.918", W166* 12' 32.67", 67 meters above sea level.
  • (Location from picture)

Data Visualizer Online

• http://monitors.iarc.uaf.edu/data/uaf_sp/teller_cas/

Data Archive

• Here at some point soon (2021):
  • https://ngee-arctic.ornl.gov/data/#fq=datasource%3A%22NGEE%20Arctic%22&q=busey

History

• Site installation 9/21 and 9/24 2018.
• Final initial visit on 9/26/18
• Pictures are filed in "2018 Work Nome September 2018" including pictures of fieldbook notes.
• Additional Site visits:
  • 2019-06-10
  • 2019-06-16
  • 2019-09-19
  • 2019-09-26
  • 2020-10-30
  • 2021-06-21
  • 2021-09-18

Instrumentation and Heights

• Barometric Air Pressure
  • Vaisala PTB110
  • https://www.campbellsci.com/cs106
  • Range: 500 to 1100 hPa
  • Accuracy: +-1.5 hPa -40 to +60 C
• AT/RH @ 1.5m, 3.0m
  • Rotronic HygroClip2 HC2A
  • https://www.campbellsci.com/hc2s3
  • -40 to +60 Celsius
  • =-0.1 C at 23 C
  • 0 to 100 % Relative Humidity
  • +-0.8% at 23C
• WS/WD @ 1.5m, 3.0m
  • RM Young 01508
  • https://www.campbellsci.com/05108-45-l
  • Range: 0 to 100 m/s
  • Accuracy: +-0.3m/s
  • Startup threshold: 1.0 m/s
  • Wind Direction measurement band: 0 to 355 degrees
  • Accuracy: +-3 degrees
• Snow Depth @ 3.0
  • Campbell Scientific SR50A
  • https://www.campbellsci.com/sr50a
  • Resolution: 0.25mm
  • Accuracy: +-1.2 cm (0.4% of 3.0 meter measurement range)
• Net Radiation @ 1.5m
  • Kipp & Zonen CNR4
  • https://www.campbellsci.com/cnr4
  • Shortwave Measurement Range- 305 to 2800 nm
  • Shortwave Uncertainty in total daily - < 5% (The uncertainty values are for a 95% confidence level.)
  • Longwave Measurement Range - 4500 to 42,000 nm
  • Longwave Uncertainty in total daily- < 10% (The uncertainty values are for a 95% confidence level.)
• Soil Pit 1 = Dry
  • Campbell Scientific CS109 sensors
    • https://www.campbellsci.com/109
    • Range: -50° to +70°C
    • Tolerance: ±0.2°C (over 0° to 70°C range)
    • Interchangeability Error: ±0.1°C (over 0° to 70°C range increasing to ±0.5°C at -50°C)
  • 1.5cm bgs
  • 10cm bgs
  • 20cm bgs
  • 40cm bgs
  • 80cm bgs
• Soil Pit 2 = Wet
  • Campbell Scientific CS109 sensors
    • https://www.campbellsci.com/109
    • Range: -50° to +70°C
    • Tolerance: ±0.2°C (over 0° to 70°C range)
    • Interchangeability Error: ±0.1°C (over 0° to 70°C range increasing to ±0.5°C at -50°C)
  • 5cm bgs
  • 10cm bgs
  • 40cm bgs
  • 80cm bgs
• All season Precipitation:
  • Geonor Weighing Bucket
  • https://www.geonor.com/brochures/t-200b-series-all-weather.pdf
  • Collecting Area - 200 cm^2
  • Capacity - 1500 mm H2O (including antifreeze)
  • Sensitivity - 0.05mm
  • Accuracy - 0.1% FS
  • ... only powered for summer season
  • Drained in October 2020

• Skin Temperature @ 1.5m:
  • Apogee Instruments SI-111
  • https://www.campbellsci.com/si-111
  • Operating Range: -55 to +80 C
  • Accuracy: ±0.2°C (-10° to +65°C) & ±0.5°C (-40° to +70°C)
  • Field of View: 22° half angle

Data Downloads

• Station turned on, first record:
  • 2018-09-24 22:00
• 2019-06-10 21:30
• 2019-09-26 23:30
• 2020-10-30 21:00
• 2021-06-22 02:00
• 2021-09-18 20:00

Post Trip Notes

October 2021

• In September 2021 we added a third battery and a second site to get a second snow / precip / air temperature
• Reviewing the data in mid October... I think the geonor is killing the battery even in the summer time. I left it connected when we left September and it seems likely to me the site will fail sooner this winter. Battery voltage had dropped to 12.2 in September after a summer of clouds.

October 2020

• All AT/RH Broken
• Think about putting out a second datalogger co-located since the wiring is so set... or not... I should look into it...
  • ... in order to have a nonborked reference air temperature and reference tipping bucket.
• Reviewing pictures 10/2021 while trying to figure out when the radiometer went out of level I see it was sometime before the October 2020 data download.

June 2019

• Tripod Mast Bent
• CNR4 difficult to level
• Could use a some help keeping lower anemometer from moving. Like maybe a couple pieces of unistrut to keep arm from wobbling
• Need to replace lower AT/RH as it seems completely broken.
  • Rotronic HygroClip2 HC2A
  • Should look to see if they sell a better top cap for it more resistant to moisture
• Need to get some SW12V adapter to turn AT/RH on/off and look at program / wiring for other things that could be turned off.
• Left 2 guy wire anchors and 100' of guy wire at UAF Storage. Could bring out more anchors or unistrut / nails or something. Maybe pound unistrut into ground and then pin in place?
• I thought Geonor and Solar Panel would require guying but both survived the winter while tripod mast didn't.
• I think snow sensor maybe failed over the winter, too.
• I was thinking a heavier gauge cable for solar panel might be appropriate, too.

Data Notes

Most Recent QA : 2021-10-21

Barometric Pressure

• Mostly Good
• NAN data is due to low battery voltage
• I don't know why but replacing the broken AT/RH and replacing them with working ones bonked this sensor for the summer. I didn't notice till 10/21 but can see from the data that

1.5 meter Air Temperature / Relative Humidity / Vapor Pressure

• Sensor Fails over 2018-2019 winter due to moisture.
• 2019-01-03 23:00 UTC

3.0 meter Air Temperature / Relative Humidity / Vapor Pressure

• NAN data in 2019 Winter is due to low battery voltage
• Without site visit hard to say why sensor goes dead on 2019-09-19 21:00
  • Loose wire?
  • the timing...

1.5 meter Anemometer

• NAN data in Winter is due to low battery voltage

3.0 meter Anemometer

• NAN data in Winter is due to low battery voltage

Precipitation

• Disconnected in winter to reduce battery load.
• Need to empty bucket every visit. It looks like there is just too much precip in Nome area for our visiting frequency.

Radiation

• Albedo
  • Blip at 2018-11-20 3:30 to delete
  • need to limit to 0. to 1.

Soil Pit 1

• Winter data gaps and NANs due to low battery voltage
• Sensor 5 dies 2020-05-16 22:00
• Sensor 3 dies 2020-05-16 22:00
• Sensor 2 dies 2020-06-01 10:30
• Sensor 4 dies 2020-06-01 10:30

Soil Pit 2

• Winter data gaps and NANs due to low battery voltage

Snow

• Transducer fails in January 2019.