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Hedo NIES results Spring 2004. *Akinori Takami, Takao Miyoshi, Akio Shimono, Shiro Hatakeyama, NIES, Japan [email protected]. Outline. Chemical analysis of aerosol by Aerodyne Aerosol Spectrometer (AMS) at Cape Hedo, Okinawa Japan Comparison to previous data (Fukue). - PowerPoint PPT Presentation
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Hedo NIES resultsSpring 2004
*Akinori Takami, Takao Miyoshi, Akio Shimono, Shiro Hatakeyama, NIES, Japan
Outline
• Chemical analysis of aerosol by Aerodyne Aerosol Spectrometer (AMS) at Cape Hedo, Okinawa Japan
• Comparison to previous data (Fukue)
China
JapanKorea
Fukue
N
Hedo, Okinawa
Map of East Asia and Our observation areas and places
• Particle Separation: High Vacuum with Aerodynamic lens system (Non-refractory PM1.0)
• Size Distribution: Particle Time-of-Flight
• Chemical Composition: Flash Vaporization with EI Mass Spectrometry (0-300 amu)
Credit for animation: Matt Thyson (Massachusetts) & Prof. Jose-Luis Jimenez (U Colorado)
Experimental; Aerosol Mass Spectrometer (Aerodyne AMS)
AMS at Hedo OkinawaMeasurement site at HedoMin.Of Environment, Japan site
Chemical components measured by AMS at Hedo, Okinawa spring 2004
High sulfate loadings
31M
2A
20A
av. ug m-3NH4, 2.00NO3, 0.16SO4, 6.95Cl, 0.04Org 2.14
12
10
8
6
4
2
0
dM/d
logD
va (
µg
m-3
)
5 6 7 8 9100
2 3 4 5 6 7 8 91000
2
Vacuum Aerodynamic Diameter (nm)
Ammonium Nitrate Sulphate Organics Org 44
High sulfate on 2 AprilSimilar TOF shape; internally mixedAir masses from Chinese continent
Chemical components measured by AMS at Hedo, Okinawa spring 2004
50-60 % are sulfate
China
JapanKorea
N
Okinawa0.77 , 0.02, 0.30
Fukue 0.91, 0.10, 1.05
Nitrate to sulfate ratio and organics to sulfate ratio decrease in remote islands. Chemical transformation occurred.
Ratio of nitrate, ammonium to sulfateBlue NO3/SO4, Orange NH4/SO4, Ratio in neq m-3
Green Org / SO4 g m-3