PRELIMINARY
Download
1 / 44

PRELIMINARY RESULTS from PIE 2005 the P AN I ntercomparison E xercise F. Flocke, G. Tyndall, E. Apel (NCAR) E. Willia - PowerPoint PPT Presentation


  • 128 Views
  • Uploaded on

PRELIMINARY RESULTS from PIE 2005 the P AN I ntercomparison E xercise F. Flocke, G. Tyndall, E. Apel (NCAR) E. Williams (NOAA). PIE 2005. 6/28-7/8/2005 Enchanted Mesa eight different instruments from Canada, Germany, Japan, the UK, and the US five different methods

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'PRELIMINARY RESULTS from PIE 2005 the P AN I ntercomparison E xercise F. Flocke, G. Tyndall, E. Apel (NCAR) E. Willia' - mandana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Slide1 l.jpg
PRELIMINARY RESULTSfromPIE 2005the PANIntercomparison ExerciseF. Flocke, G. Tyndall, E. Apel (NCAR)E. Williams (NOAA)


Pie 2005 l.jpg
PIE 2005

  • 6/28-7/8/2005

  • Enchanted Mesa

  • eight different instruments

  • from Canada, Germany, Japan, the UK, and the US

  • five different methods

  • ambient and standards measurements


Results are preliminary l.jpg
results arePRELIMINARY


Instruments l.jpg
Instruments

  • Hiroshi Tanimoto, NIES, Japan; GC/MS

  • Graham Mills, UEA, UK, GC/ECD

  • Stefan Gilge, DWD, Germany, GC/ECD

  • Bernhard Rappenglueck and Rainer Schmitt, U. Houston and Metcon, Germany, GC/ECD

  • Jason O’Brien, Environment Canada, GC/PDD

  • Ron Cohen, Paul Wooldridge, Anne Perring, UCBerkeley, TD-LIF

  • Jim Roberts, NOAA, GC/ECD

  • Aaron Swanson, NCAR and Saewung Kim, GaTech, CIMS

  • (Frank Flocke, NCAR, Dual-GC/ECD)


Other instruments l.jpg
Other Instruments

  • Meteorological parameters (NOAA)

  • NO, NO2, O3 (NOAA)

  • NOy reference instrument in referee trailer (NCAR)


Slide6 l.jpg

Enchanted

Mesa


Slide7 l.jpg

The forbidden

zone

Flow: 12~20 slpm

standards

ambient

GC5

Internet

Access,

email




Uea gc ecd l.jpg
UEA GC/ECD

  • Restek MXT-200 Column

  • 0.53 ID, 10 m, 1.0µ film

  • 22 sccm

  • 17 ºC isothermal

  • cycle time 10 minutes

  • PAN, PPN


Env can gc pdd l.jpg
Env. CAN GC/PDD

  • Restek MXT-200 Column

  • 0.53 ID, 8 m, 1.0µ film

  • 35 sccm

  • 15 ºC isothermal

  • cycle time 10 minutes

  • PAN, PPN


Noaa gc ecd l.jpg
NOAA GC/ECD

  • Restek Rtx-200 Column

  • 0.53 ID, 7.5 m, 1.0µ film

  • 10 sccm

  • 15 ºC isothermal

  • cycle time 5 minutes

  • PAN, PPN, APAN, MPAN, PiBN


Nies gc ms l.jpg
NIES GC/MS

  • DB-1 MS Column

  • 0.25 ID, 10 m, 0.25µ film

  • 2 sccm

  • cycle time 10 minutes

  • PAN, PPN, APAN, MPAN, PiBN, PnBN


Uh metcon gc ecd dwd gc ecd l.jpg
UH/Metcon GC/ECDDWD GC/ECD

  • DB1/DB-5 Column combination

  • 0.53 ID, ~10 m total

  • 20 sccm

  • ~15 ºC isothermal

  • PAN, PPN

  • cycle time 10 minutes

  • DWD GC has modified flow control (PAN only)


Uc berkeley td lif l.jpg
UC Berkeley TD-LIF

  • measures NO2 by LIF

  • has 3 thermal decomposition stages held at ~150, 300 and 550 degrees decomposing all PANs, ANs, “NOy” into NO2

  • cycle time 10 seconds

  • measures the sum of all PANs


Ncar gatech cigar l.jpg
NCAR/GaTech CIGAR

  • measures PANs by CIMS

  • PAN, PPN, PBN, APAN, MPAN, PBzN, MoPAN, PPeN, ...

  • cycle time 2 seconds

  • scans should show additional PANs unless they are very sticky


Ncar 2 channel gc ecd reference instrument l.jpg
NCAR 2 Channel GC/ECD(“reference” instrument)

  • 2 RTX-200 Columns

  • 7.5m, 0.53 ID, 1.0µ film

  • 20 sccm

  • 20 ºC isothermal

  • cycle time 3 minutes

  • PAN, PPN, APAN, MPAN, PiBN


Measurements l.jpg
Measurements

  • all measurements from common manifold

  • ambient air

  • PAN and PPN standards in dry zero-air from manifold

  • PAN and PPN standards in humidified zero air

  • i-Propyl nitrate (interferent) in zero-air



























Conclusions for now l.jpg
Conclusions (for now)

  • very good agreement for ambient PAN measurements, considering it’s field data

  • acceptable agreement for ambient PPN measurements (might improve)

  • LIF measures consistently higher than sum of individual PANs (expected?)

  • extra PANs that GCs and CIMS miss?

  • no indication of LIF counting ANs as PANs

  • LIF NO2 background subtraction problem?

  • more work has to be done to produce final data and merge measurements together

  • compare MPAN, APAN, PBN