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Ozone Observations Analyses on Eastern IslandLa Serena, 22 Nov. 2004
Juan QuintanaDirección Meteorológica de Chile
juaquin@meteochile.cl
Presentation:Presentation:
• Introduction (Campaign 2003) Introduction (Campaign 2003)
• Typical ozone sounding at Eastern Typical ozone sounding at Eastern IslandIsland
• Relevant processes atmospheric Relevant processes atmospheric observedobserved
• ConclusionsConclusions
Anticiclonic Vorticity and Subsidence
Climatological Aspects on Eastern Island
Climatological Zonal Wind – Spring (Sep-Nov)
Ozonosondes: Esatern IslandPeriod: 1995-2001
Pre
ssur
e Le
vel (
hPa)
70
100
150
200
250
300
400
500
700
850
925
1000
Standarized Index
43210-1-2
CP 1
CP 2
CP 3
1500m
Cluster groups 1, 2, 3 and 4
38 Soundings 15 Soundings 15 Soundings 6 Soundings
Pressu
re Lev
el (hP
a)
70
100
150
200
250
300
400
500
700
850
925
1000
mPa
109876543210
Pres
sure
Leve
l (hPa
)
70
100
150
200
250
300
400
500
700
850
925
1000
mPa
109876543210
Pres
sure
Leve
l (hPa
)
70
100
150
200
250
300
400
500
700
850
925
1000
mPa
109876543210
Pres
sure
Leve
l (hPa
)
70
100
150
200
250
300
400
500
700
850
925
1000
mPa
109876543210
Ozonosondes: Esatern IslandPeriod: 1995-2001
Launch Nº Date Time (UTC) T. Resolution (s) Max. Height (m)1 09Nov.2003 16:00 10 325482 10.Nov.2003 0:00 10 331803 10.Nov.2003 6:00 10 312494 10.Nov.2003 18:00 10 333135 11.Nov.2003 0:00 10 331166 11.Nov.2003 6:00 10 350617 12.Nov.2003 0:00 10 339218 12.Nov.2003 15:00 10 334619 13.Nov.2003 18:00 10 26615
LH=UTC-5H
Campaign 2003: Eastern Campaign 2003: Eastern IslandIsland
Conditions Surface Conditions Surface 08 to 13 Nov. 200308 to 13 Nov. 2003
Isla de Pascua
0
5
10
15
20
25
30
8 9 10 11 12 13 14Días
T° Máxima (°C) - T° Mínima (°C)- Precipitación (mm)
Tº Max.
Tº Min.
Eastern Island
Day 08 Day 10
Day 12
Day 09
Day 11 Day 13
Subtropical Jet Stream (m/s), 200 hPaSubtropical Jet Stream (m/s), 200 hPa
(m/s)
Sinoptic ConfigurationSinoptic Configuration08 to 13 Nov. 200308 to 13 Nov. 2003
Geopotencial Height 500 hPa
Day 08 Día 10
Día 12
Día 09
Día 11 Día 13
Source: NCEP/NCAR
0
5000
10000
15000
20000
25000
30000
35000
40000
0 2 4 6 8 10 12 14 16
(mPa)
(m)
09Nov_16UTC 10Nov_00UTC 10Nov_06UTC
10Nov_18UTC 11Nov_00UTC 11Nov_06UTC
12Nov_00UTC 12Nov_15UTC 13Nov_18UTC
Tropospheric Ozone Average (0-16 km)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
09N
ov_
16U
TC
10N
ov_
00U
TC
10N
ov_
06U
TC
10N
ov_
18U
TC
11N
ov_
00U
TC
11N
ov_
06U
TC
12N
ov_
00U
TC
12N
ov_
15U
TC
13N
ov_
18U
TC
(mP
a)
0
2000
4000
6000
8000
10000
12000
14000
16000
-20 0 20 40 60 (m/s)
(m)
Zonal 11Nov00UTC Merid.12Nov00UTC
Zonal 12Nov00UTC Merid. 12Nov00UTC
WestEast
North South
Wind: Zonal - Meridional
0
2000
4000
6000
8000
10000
12000
14000
16000
-80 -60 -40 -20 0 20 40(m/s)
(m)
Temp.11Nov00UTC Temp 12Nov00UTC
Temperature
(°C)
0
2000
4000
6000
8000
10000
12000
14000
16000
0 0.5 1 1.5 2 2.5 3 3.5
(mPa)
(m)
0
2000
4000
6000
8000
10000
12000
14000
16000
250 300 350 400 450 500 550
(K)
(m)
Tropospheric Ozone09-13 Nov 2003
Potencial Temperature09—13 Nov. 2003
100
110
120
130
140
150
160
170
180
190
200
8 9 10 11 12 13 14
Pre
ssur
e (h
Pa)
Reanalyses Model Observed
Eastern Island - Tropopause (hPa)
ConclusionsConclusions
• Maximun Ozone Tropospheric is observed during Maximun Ozone Tropospheric is observed during Spring in low troposphere and high troposphere on Spring in low troposphere and high troposphere on Eastern Island.Eastern Island.
• Extratropical cyclones, troughs and Subtropical Jet Extratropical cyclones, troughs and Subtropical Jet Stream Intense (>25m/s) favor significant Stream Intense (>25m/s) favor significant Stratosphere-troposphere exchange (STE).Stratosphere-troposphere exchange (STE).
• Marine Boundary Layer (MBL) seems to play a role Marine Boundary Layer (MBL) seems to play a role important in tropospheric ozone maximum.important in tropospheric ozone maximum.
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