Characterization of transport and dynamical boundaries during CONTRAST using chemical tracers Sue...
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Transcript of Characterization of transport and dynamical boundaries during CONTRAST using chemical tracers Sue...
Characterization of transport and dynamical boundaries during CONTRAST
using chemical tracers
Sue Schauffler, Elliot Atlas Eric Apel, Rebecca Hornbrook
RF06, Jan 25: Shear line just west of GuamRF10, Feb. 8: Plume of CO northeast of Guam
The WRF low-level wind analysis from 00z on 25 January shows the air mass boundary as a wind shift line extending from Yap (PTYA) to northwest of Guam (PGUM) to 20N, 154E. The thermal contrast on either side of the front is small south of 18N, so the boundary is called a shear line rather than a cold front.
The 3km WRF analysis shows that the location of the GV’s spiral descent (17N,138E) was well into the post-frontal air mass.
RF06 Trajectory analysis for the last part of the flight on both sides of the shear line.
Trajectories are color coded by pressure along the flight track.Initial (left) & - Day 1 (right)
RF06 RF06
RF06 Trajectory analysis for the last part of the flight on both sides of the shear line
Days -2 & -3
RF06 RF06
12x103
10
8
6
4
2
0
Alti
tud
e, m
100806040200Benzene, pptv
100806040200
O3, ppbv
00:00 03:00 06:00
Time, UTC
O3
VOC
RF06 O3/CO/H2O time series
RF06 vertical profile of ozone and benzene west of the shear line
RF06; –day 1 back trajectories from < 4.5km in the dip west of the shear line. Trajectories are color coded by ozone mr.
RF06: - day 2 back trajectories from < 4.5km in the dip west of the shear line. Trajectories are color coded by ozone mr.
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange)
Alkanes are indicative of urban influenced air masses
12x103
10
8
6
4
2
0
Alti
tud
e, m
6004002000Propane, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
12x103
10
8
6
4
2
0
Alti
tud
e, m
150100500n-Butane, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
12x103
10
8
6
4
2
0
Alti
tud
e, m
100806040200isobutane, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange)
Benzene and isobutane are also indicative of urban influenced air masses
12x103
10
8
6
4
2
0
Alti
tud
e, m
100806040200benzene, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange) 12x10
3
10
8
6
4
2
0
Alti
tud
e, m
200150100500Acetonitrile, pptv
00:00 03:00 06:00
Time, UTC
12x103
10
8
6
4
2
0
Alti
tud
e, m
10008006004002000Acetone, pptv
00:00 03:00 06:00
Time, UTC
Biomass burning indicators are not elevated
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange)
Marine BL indicators are not elevated
12x103
10
8
6
4
2
0
Alti
tud
e, m
2.52.01.51.00.50.0Dibromomethane (CH2Br2), pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
12x103
10
8
6
4
2
0
Alti
tud
e, m
2.52.01.51.00.50.0Bromoform, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange) 12x10
3
10
8
6
4
2
0
Alti
tud
e, m
76543210ethyl nitrate, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
12x103
10
8
6
4
2
0
Alti
tud
e, m
121086420Isopropyl Nitrate, pptv
00:00 03:00 06:00
Time, UTC
TOGA AWAS
12x103
10
8
6
4
2
0
Alti
tud
e, m
150100500n-Butane, pptv
12840n-butyl nitrate, pptv
00:00 03:00 06:00
Time, UTC
n-butane (TOGA) n-butane (AWAS) n-butyl nitrate (AWAS)
RF06: Four vertical profilesGuam ascent (purple), Guam descent (red),
West of shear line descent (yellow), west of shear line ascent (orange)
Initial calculations show a photochemical lifetime of the lowest altitude samples of ~3 days based on the benzene/toluene ratio.
RF10 (Feb. 8) CAM-Chem forecast of CO River at 200mb
RF10 Trajectory analysis CO PlumePlume location on the flight track Day -1
RF10 Trajectory analysis CO PlumeDay -3
RF10 Trajectory analysis CO PlumeDay -7
MODIS Fire counts Feb 4 – Feb 12, 2014
Modis Fire Count Map: Christine Weidinmyer
RF10: CO plume180
160
140
120
100
80
60
CO
, p
pb
v
00:30 00:40 00:50 01:00 01:10 01:20CONTRAST RF10, 2/8/14
600
500
400
300
200
100
0
HC
N,
pp
tv
120
100
80
60
40
20
0
O3 , p
pb
v
16x103
14
12
10
8
6
4
2
0
altitu
de
, m
250
200
150
100
50
0
Ace
ton
itrile
, p
ptv
800
600
400
200
0
Ace
ton
e, p
ptv
HCN GV Altitude Acetonitrile CO Acetone O3
180
160
140
120
100
80
60
CO
, p
pb
v
00:30 00:40 00:50 01:00 01:10 01:20CONTRAST RF10, 2/8/14
40
30
20
10
0
Be
nze
ne
, p
ptv
160
140
120
100
80
60
40
20
0
Ace
teta
lde
hyd
e, p
ptv
16x103
14
12
10
8
6
4
2
0
altitu
de
, m
200
150
100
50
0
Fo
rma
lde
hyd
e,
pp
tv
14
12
10
8
6
4
2
0
n-B
uta
ne
, pp
tv
Benzene Acetaldehyde formaldehyde n-Butane GV Altitude CO
RF10: Vertical profiles
12
10
8
6
4
2
0
Alti
tude
, km
1301201101009080
CO, ppbv
5004003002001000HCN, pptv
200150100500Acetonitrile, pptv
CO HCN Acetonitrile
12
10
8
6
4
2
0
Alti
tud
e,
km
1301201101009080
CO, ppbv
3.02.52.01.51.00.50.0Bromoform, pptv
403020100Benzene, pptv
CO Bromoform Benzene
Questions?
Thanks again to Becky, Eric, Elliot, Shawn, Jim, and Laura for their assistance with this presentation.