Role of climate, the stratosphere and emissions on U.S. surface O 3 trends and extremes MEIYUN LIN (PRINCETON/NOAA GFDL) GFDL-AM3 (Nudged to NCEP winds) U.S. O 3 background (Apr-Jun) O 3 [ppb] 70 Background (zero out US emissions) New US O 3 Standard
17
Embed
MEIYUN LIN (P /NOAA GFDL) · Lin, Meiyun; AM Fiore; OR Cooper; LW Horowitz et al. (JGR, 2012JD018151) 2 • GFDL-AM3 captures observed vertical structure • Deep mixing depths in
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Geophysical Fluid Dynamics Laboratory
Role of climate, the stratosphere and emissions
on U.S. surface O3 trends and extremes
MEIYUN LIN (PRINCETON/NOAA GFDL)
GFDL-AM3
(Nudged to NCEP winds)
U.S. O3 background (Apr-Jun)
O3 [ppb]
70
Background (zero out US emissions)
New US O3
Standard
Geophysical Fluid Dynamics Laboratory
Ozonesondes
(May 28) GFDL-AM3 (~50x50 km2)
North South
Deep stratospheric O3 intrusions
over the western U.S.
Alt
itu
de
(k
m)
CalNex2010
30 60 150 90 120 O3
[ppb]
Lin, Meiyun; AM Fiore; OR Cooper; LW Horowitz et al. (JGR, 2012JD018151) 2
• GFDL-AM3 captures observed vertical structure
• Deep mixing depths in late spring facilitate transport of FT ozone to the surface
27-May-2010, 21:00UTC
TH
SN
North South
0 5 PVU
300 hPa PV
Stratospheric intrusions can push
surface O3 above the U.S. national standard
GFDL-AM3
Lidar (Langford)
Flight track
30 60 150 90 120 [ppb]
A
ltit
ud
e (
km
)
S. California (May 23, 2010)
O3Strat
Background
(zeroing out US emissions)
OBS, AM3
Standard
100
75
25
50
5
Su
rfac
e O
3 (p
pb
) , M
DA
8 May 24
Jun/1/2010 May/13/2010
CalNex2010
O3Strat
3 Lin, Meiyun; AM Fiore; OR Cooper; LW Horowitz et al. (JGR, 2012JD018151)