Transpacific Transport of Ozone Pollution During INTEX-B Lin Zhang, Daniel J. Jacob, INTEX-B Science...
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Transcript of Transpacific Transport of Ozone Pollution During INTEX-B Lin Zhang, Daniel J. Jacob, INTEX-B Science...
Transpacific Transport of Ozone Pollution During INTEX-B
Lin Zhang, Daniel J. Jacob, INTEX-B Science Team, TES Science Team
GEOS-Chem User Meeting Harvard University
Apr 13 2007
GEOS-Chem simulation V7-04-09 with GEOS-4, 2º x 2.5º
Lightning 6 Tg N/yr, regional rescaled with OTD/LIS climatology (Lee Murray)
2004 NOx emission for China (Q. Zhang et al. 2007) (Yuxuan Wang, 65% higher than 2000)
Streets et al [2006] CO emission for China increased by 57% (number from B. Pierce/D. Streets at the INTEX-B workshop)
INTEX-B flight tracks
INTEX-B pacific part (Apr 17-May 15, 2006) Characterize ozone production in
transpacific plumes. Measurements from M. A. Avery,
W. H. Brune, T. Campos, C. A. Cantrell, R. C. Cohen, F. M. Flocke, B. Heikes, G. Huey, L. Mauldin, G. W. Sachse, H. B. Singh, A. J. Weinheimer, and P. O. Wennberg
MOPITT observed CO column trend over China
Eastern China (20N-50N, 100E-130E)
1.6% relative to 2000
DC8
C130
CO NOx PAN Ozone
Comparisons of mean vertical profiles of CO, NO2, PAN and ozone
Ozone production in transpacific plumes
Direct ozone transport and ozone produced during transport
Transpacific plumes often split into two branches. Ozone production takes place in the south branch.
L
H
The mean Asian ozone, CO, NOx, and PAN enhancements over the North Pacific at 800 hPa during the INTEX-B period
Latitudinal distribution of NO2 and PAN below 4 km
Conversion from PAN to NOx in the subtropics
Ozone CO
NOx PAN
NO2 PAN
Altitude-longitude section of the Asian ozone enhancement at 30-40N
NA
for the INTEX-B period mean for the May 5-11 plume
NA
A
B
Aircraft measured transpacific plume on May 9th
A
B
A-south branchGEOS-Chem Tropospheric CO Column on May 9
Simulated net ozone production at 680 hPa on May 9
Solid: observationsDot: GEOS-Chem
B-north branch
PAN
PAN
HNO3
NO
O3
CO
COO3
May 5
May 6
May 7
May 8
May 9
TES observations of the transpacific plume
TES GEOS-Chem
Tropospheric CO column
GEOS-Chem with TES AK
TES observed transpacific transport of ozone pollution
TES GEOS-Chem simulated Asian ozone enhancement
Ozone concentration at 500 hPa
GEOS-Chem with TES AK
May 5-6
May 7-8
May 9-10
Measurements by Dan Jaffe at Mt. Bachelor (2.7 km)
Bias = -14 ppbvR = 0.34
Bias = -1ppbvR = 0.74
observed CO (139 ± 14)model CO (125 ± 12)
model Asian CO enhancement (47 ± 7)
observed ozone (54 ± 10)model ozone (53 ± 8) Asian Ozone enhancement
(10 ± 2 )
Ozone produced in Asian BL (4 ± 1.4)
Back-ups
Model Ozone at Surface for the INTEX-B period
MOPITT and AIRS observations of the Asian plume
MOPITT (AM) AIRS
Total CO column
May 5
May 6
May 7
May 8
May 9