a hiaper campaign to observe the impact of dust on the pacific ocean and north america v....
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A HIAPER Campaign to Observe the Impact of Dust on the Pacific OceanAnd North America
V. Ramanathan, D. Rogers and J. StithNational Center for Atmospheric Research
Major Questions:
How Dusty and Polluted is the Pacific Ocean?
How much Dust and Pollution Enters N. America from mid and upper troposphere?
How Does the Dust and BC Impact the Pacific Cloud Systems in the Mid and upper Troposphere?
What is the impact of the dust and the dusty cloud systems on solarRadiation (Dimming) over the Pacific Ocean?
By interacting with solar and long wave radiation, Does the Dust/Pollution Impact Pacific SSTs and Storm Tracks?
Asian Dust Distributions from Horizontal to VerticalF. Li and V. Ramanathan
Center for Atmospheric Sciences,Scripps Institution of Oceanography,University of California, San Diego
To be Submitted to J. Climate, May 2005
Pacific Ocean
Arabian Sea
SAGE II aerosol profiles, seasonal mean, 1984-2001Yellow Sea (30N-50N, 120E-150E)
0
5
10
15
20
25
30
35
40
45
1.E-07 1.E-06 1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00
extinction coefficient (1/km, 1020nm)
Hei
ght (
km)
Mar_Apr_May
Jun_Jul_AugSep_Oct_Nov
Dec_Jan_Feb
Dust-Ice Cloud Interactions
Flight 4 (03 April 2004): Aerosol layer at ca. 3500 m
Vertical Profiles for Dust Event #1
Continental pollution
morning afternoon Continental/urban pollution
CIFEX Campaign; Trinidad Head, CA
MIDWAY Obs. Prospero;Now an ABC Observatory
CIFEX Campaign; Trinidad Head, CA
MODIS AOD and Effective Radius (EFR), over Asian Dust Area, Yellow Sea (30N-50N, 120E-150E), 2000-2003
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Month
AO
D (
550n
m)
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4AOD
EFR
2000 2001 2002 2003
Effe
ctiv
e R
adiu
s (u
m)
MODIS AOD, small mode and large modeYellow Sea (30N~50N, 120E~150E), 2001~2003
0
0.1
0.2
0.3
0.4
0.5
0.6
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Month
MO
DIS
AO
D (5
50nm
)
Large mode
Small mode
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