PRELIMINARY
Download
1 / 44

PRELIMINARY RESULTS from PIE 2005 the PAN Intercomparison Exercise F. Flocke, G. Tyndall, E. Apel NCAR E. Williams NOAA - 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 PAN Intercomparison Exercise F. Flocke, G. Tyndall, E. Apel NCAR E. Williams NOAA' - 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


ad