PANTHER- Gas Chromatograph
Download
1 / 12

SOLVE-II 2002-2003 Kiruna Sweden Pre-AVE 2004 Costa Rica, JSC - PowerPoint PPT Presentation


  • 55 Views
  • Uploaded on

PANTHER- Gas Chromatograph. F.L. Moore 1,2 , G.S. Dutton 1,2 , J.W. Elkins 2 , B.D. Hall 2 , D.F. Hurst 1,2 , and J.D. Nance 1,2. Can Measure ~ 18 trace gas species every 1 to 3 min. SOLVE-II 2002-2003 Kiruna Sweden Pre-AVE 2004 Costa Rica, JSC AVE-0506 2005 JSC (Houston)

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 ' SOLVE-II 2002-2003 Kiruna Sweden Pre-AVE 2004 Costa Rica, JSC' - leonard-gibson


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

PANTHER- Gas Chromatograph

F.L. Moore1,2, G.S. Dutton1,2, J.W. Elkins2, B.D. Hall2, D.F. Hurst1,2, and J.D. Nance1,2.

Can Measure ~ 18 trace gas species every 1 to 3 min.

SOLVE-II 2002-2003 Kiruna Sweden

Pre-AVE 2004 Costa Rica, JSC

AVE-0506 2005 JSC (Houston)

AVE-wiff 2005 JSC (Houston)

CR-AVE 2006 Cost Rica, JSC

TC4 2007 Cost Rica, JSC

Over 300 Hours of flight time.

Vortex, High + Mid Latitude,Tropics.


PAN and other Trace Hydrohalocarbon ExpeRiment (PANTHER)

6-Channel GC (gas chromatograph).

* 3 ECD(electron capture detectors), packed columns (OV-101, Porpak-Q, molecular sieve).

* 1 ECDwith a TE (thermal electric) cooled RTX-200 capillary column.

* 2-channel MSD(mass selective detector). The MSD analyses two independent samples

concentrated onto TE cooled Haysep traps, then passed through two temperature programmed

RTX-624 capillary columns.

Compounds Measured on Past Missions:

ECD channels: N2O, SF6, CCl2F2 (CFC-12),) CCl3F (CFC-11), and CBrClF2 (halon-1211), H2, CH4, CO, CCl4, CH3CCl3 (methyl chloroform) and PAN (peroxyl acetyl nitrate).

Sample load width on ECD channels is 3 seconds

> Data set correlates well with other fast measurements.

MSD channels: The methyl halidesCH3I, CH3Br, CH3Cl, the sulfur compoundsCOS, CS2, the hydrochlorofluorocarbons CHClF2 (HCFC-22), C2H3Cl2F (HCFC-141b), C2H3ClF2 (HCFC-142b), and the hydrofluorocarbon C2H2F4 (HFC-134a)

Sample load width of MSD channels is 2 min.

> Data set correlates with time average of fast measurements.

TDL Channel: Water Vapor (Currently relocated back in UCATS.) Obtained simultaneous measurements with multiple Water Vapor instruments during TC4.





Out flow from Convective Events. Mixed region.

CR-AVE 02-09-2006

( In the gray aria mid flight we

see BL air from Amazon. )

CFC-11 = 250 ppt

No Strato Loss.

COS loss of 100 ppt

Vegetative up take in BL.

HCFC-22

anthropogenic in BL?

CH3I elevated to 0.2 ppt

marine BL or bio-mass burn?

PAN ?


CR-AVE AVE-Houston Mixed region.

TC4 (high convection)


H. Singh et al., 1994 JGR Mixed region.

PAN Lifetime in the BL ~ 1 hour !

PAN vs CO shows a high contrast between BL vs Lower Trop.

PAN vs CO may be sensitive to inflow from the BL vs Entrainment from the Lower Trop.

R. Talukdar et al. 1995 JGR


Lifetime of CO Mixed region. in TTL ~ 1 Month

(OH and Photolysis.)

Data set contains information about convection from all longitudes due to the zonal wend.


PAN Mixed region.

Lifetime ~ 1 Month in the TTL

The following data set will also contain information about convection from all longitudes due to the zonal wends.

But will also be modified by O3 chemistry!

S.A. McKeen et al., 1997 GRL

Chemically important in the TTL and LS.

NOx/NOy and OH/HOx - Chem. equilibrium fast in the TTL and LS.

- Test Measured vs. Calculated ratio

PAN is NOx reservoir (stabilize for month)

Photolysis of acetone is a source of OH

and PAN (through conversion of NOx).

Keim et al’s 1999 suggesting 20- 30 ppt PAN


ad