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Question B - Mixed Layer Heights: NOAA Twin Otter Data (Mike Hardesty)
8 September PreviewRapid Science Synthesis*
Questions F, K - VOC vs. NOx Sensitive Photochemistry• Observation based analysis - 2006 RHB vs. 2000 Electra
*http://esrl.noaa.gov/csd/2006/rss/
Questions A, C, D, E - Emissions: Ronald Brown Data• HVROC 2006 vs. 2000• Oil Platform Emissions
Question J - Performance of O3 and PM2.5 forecast models (Jim Wilczak)
Question B - Mixed Layer Heights: NOAA Twin Otter Data (Mike Hardesty or ?)
Questions F, K - VOC vs. NOx Sensitive Photochemistry• Observation based analysis - 2006 RHB vs. 2000 Electra
Questions A, C, D, E - Emissions: Ronald Brown Data• HVROC 2006 vs. 2000• Oil Platform Emissions
Question J - Performance of O3 and PM2.5 forecast models (Jim Wilczak)
8 September PreviewRapid Science Synthesis*
*http://esrl.noaa.gov/csd/2006/rss/
Pelimin
ary
Pelimin
ary D
ata &
Analysis
Data &
Analysis
Do Not C
ite o
r Distri
bute!!!
!
Do Not C
ite o
r Distri
bute!!!
!
29.9
29.8
29.7
29.6
29.5-95.3 -95.2 -95.1 -95.0 -94.9
12080400
Ozone (ppb)
Barbour'sCut
JacintoPort
La Porte
Questions A, C, D, E - Emissions: Ronald Brown Data• HVROC 2006 vs. 2000 (Bill Kuster)
GC-MS 5 min Avg. data
Significant change in emissions?
High variability makes significant comparison difficult
0.1
1
10
100
pro
pyle
ne
(p
pb
v)
median
Te
xA
QS
20
00
La
Po
rte
Te
xA
QS
20
06
RH
B H
SC
maximum
Te
xA
QS
20
06
RH
B B
arb
er's C
ut
1
10
100
1000
eth
yle
ne
(p
pb
v)
median
Te
xA
QS
20
00
La
Po
rte
Te
xA
QS
20
06
RH
B H
SC
maximum
Te
xA
QS
20
06
RH
B B
arb
er's C
ut
1034 110 320Sample numbers
Questions A, C, D, E - Emissions: Ronald Brown Data• HVROC 2006 vs. 2000 (Bill Kuster, Jessica Gilman)
color-coded by NOy
"Shelby Sea"
Ship track
30 min on station~1.1 naut. miles
Questions A, C, D, E - Emissions: Ronald Brown Data• Oil Platform Emissions (Hans D. Osthoff)
Average slope =10.5±1.2
Average slope = 9.3±0.8
color-coded by time
NOy (p
pbv)
NO2
(ppb
v)
NOx Emission factor:32 ± 3 g/kg
"Shelby Sea”Oil Platform
Average slope 2.4±0.8
color-coded by time
CO (p
pbv)
SO2
(ppb
v)0.2% C emitted as CO
"Shelby Sea”Oil Platform
SO2 Emission factor:6.0 ± 2.3 g/kg
Average slope = 1.3±0.5
TexAQS 2000 Electra Flights
30
29
-96 -95 -94
Beaumont
PortArthur
ParishFreeport
ExxonMobil
NOy - NOx (ppbv)
O
zone
(ppb
v)
Sillman: Observation-based methods (OBMs)
NOy - NOx (ppbv)
O
zone
(ppb
v)
Sillman: Observation-based methods (OBMs)
NOx sensitive to mixed
Electra2000
TexAQS 2006 Ronald H. Brown30.0
29.8
29.6
29.4
29.2
29.0-95.4 -95.2 -95.0 -94.8 -94.6 -94.4
100
80
60
40
20
Ozone (p
pbv)RHB
8/17
30.0
29.8
29.6
29.4
29.2
29.0-95.4 -95.2 -95.0 -94.8 -94.6 -94.4
150
100
50
Ozone (p
pbv)RHB
9/1
250
200
150
100
50
0
Ozone (
ppbv)
403020100NOy - NOx (ppbv)
Ozone vs NOy - NOx
Electra2000
RHB17 Aug 2006
RHB29 Aug 2006
No clear indication for systematic change
NOAA/Earth Systems Research Laboratory
TEXAQS 2006 Model Verification Web Page
http://www.etl.noaa.gov/programs/2006/texaqs/verification/
Jim WilczakIrina DjalalovaStu McKeen
Relationship between mixing layer depthand ozone concentrations
• Question: What is the correlation between mixing layerdepth and ozone concentration?
• One might expect that a deeper mixing layer depthwould be associated with reduced ozone concentrationsdue to dilution
• However, main sources of ozone precursors are notalways associated with deepest mixing layer (e.g., shipchannel)
• Transport of precursors into shallow boundary layer(e.g., over Galveston Bay) can enhance concentrations
• Airborne ozone lidar data provides data set forinvestigation of mixing layer depth/ ozone concentrationcorrelations
August 14 Aerosol Backscatter and Ozone
Urban heat island
August 14
Ozone Mixed layer height
