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)
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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.
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.
Ray et. al. 1999
Contrast Between Seasons 380 K
Out flow from Convective Events. Mixed region.
( 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.
anthropogenic in BL?
CH3I elevated to 0.2 ppt
marine BL or bio-mass burn?
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