hedo nies results spring 2004
DESCRIPTION
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 PresentationTRANSCRIPT
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Hedo NIES resultsSpring 2004
*Akinori Takami, Takao Miyoshi, Akio Shimono, Shiro Hatakeyama, NIES, Japan
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Outline
• Chemical analysis of aerosol by Aerodyne Aerosol Spectrometer (AMS) at Cape Hedo, Okinawa Japan
• Comparison to previous data (Fukue)
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China
JapanKorea
Fukue
N
Hedo, Okinawa
Map of East Asia and Our observation areas and places
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• 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)
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AMS at Hedo OkinawaMeasurement site at HedoMin.Of Environment, Japan site
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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
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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
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Chemical components measured by AMS at Hedo, Okinawa spring 2004
50-60 % are sulfate
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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