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USGS Research Sites - GS01 and GS02 Arvada, CO

USGS Research Sites - GS01 and GS02 Arvada, CO. Location - Arvada Community Garden, CO. Experimental site located in a secured urban area Previously used for special studies by the USGS Precipitation Chemistry Project Instruments situated on a berm, complying with the 45 degree siting

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USGS Research Sites - GS01 and GS02 Arvada, CO

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  1. USGS Research Sites - GS01 and GS02Arvada, CO

  2. Location - Arvada Community Garden, CO • Experimental site located in a secured urban area • Previously used for special studies by the USGS Precipitation Chemistry Project • Instruments situated on a berm, • complying with the 45 degree siting • criteria • AC power • Collocated with Colorado Dept. of • Public Health and Environment Air • Quality and Meteorological Monitoring

  3. Purpose of USGS Research Sites • Identify logistical and technical issues associated with “modernized” site operation • Compare variability in chemical data for samples obtained from ACM and N-CON and identify/quantify potential bias • Not intended to duplicate effort of Program Office’s back yard studies, but some cross-over unavoidable

  4. USGS Research Sites Operation • GS01 – Standard NADP/NTN site with ACM Collector and Belfort 5-780 rain gage • GS02 – N-CON NTN-type collector and OTT Pluvio rain gage Operated as standard collocated NTN sites

  5. Acknowledgments USGS Precipitation Chemistry Project appreciates the aid and cooperation of the following: • Scott Dossett • Karen Harlin • Roger Claybrooke • Jeff Pribble • ISWS, NADP Program Office

  6. OTT Pluvio

  7. Instrumentation Issues OTT Pluvio Rain Gage OTT Pluvio is fragile and must be shipped in a special container Repair to gage cost $500+, had to be shipped to Germany and took 3 months OTT purchased by HACH Company located in Loveland, CO Repair center scheduled to move to Loveland, CO

  8. Instrumentation Issues OTT Pluvio Rain Gage Special programming is required to read and format OTT data. Microsoft Excel will not be sufficient. Upgraded OTT Pluvio includes: New software Algorithm that eliminates false positives Channel for logging collector events and Satellite telemetry coming soon

  9. N-CON NTN CollectorSample Collection

  10. N-CON NTN CollectorData Collection Omega State (Contact Closure) Datalogger ($90)

  11. Instrumentation Issues N-CON NTN Collector • Took N-CON over 4 months to deliver collector • Instrument looked like it had been used in the field – not brand new? • Had to rewire the relay for event recorder output

  12. Instrumentation Issues N-CON NTN Collector • Seal of bucket is questionable. Bucket latch tends to pull bucket askew. • Usually catches more precipitation than ACM due to optics – improvement? • Seems to be open more due to blowing, dry snow during periods with no precipitation – drawback?

  13. N-CON NTN Collector Bucket latch

  14. Additional Equipment – NOAH-3

  15. Summary • Began sample collection in Jan. 2004 and plan to continue through Sept. 30 • Continuing to identify logistical and technical issues associated with “modernized” site operation • Plan to compare preliminary data in poster at NADP 2004 fall meeting and may publish data in a USGS Open File Report

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