Aerosol Physics and Chemistry ValidationNUIG

Networks of continuous Observing Stations:

EMEP - European

IMPROVE - US

GAW - Global

Generally, good coverage with PM mass for inorganic species,

Poor coverage for chemical mass

Poorer coverage for size-resolved chemical mass

Some stations (i.e. Mace Head) have semi-continuous size resolved measurements in recent years (ie 2003 on).

Model first simulation

Desert dust and Sea-salt – 3 size bins.

1 December 2002 to 30 June 2003

Series of 12-hour forecasts starting every 12 hours from the ECMWF operational analyses.

Suggested initial validation period – January to June 2003

EMEP

IMPROVE

December 2000

Bukit KotoTabang

South Pole

Point Barrow

Mauna Loa

Alert

Pallas-Sodankylä

Minamitorishima

Assekrem-Tamanrasset

Arembepe

Ushuaia

Izaña

Amsterdam Island Cape Grim

Cape Point

Samoa

Ny Ålesund

Lauder

MaceHead Zugspitze-Hohenpeissenberg

Mt Waliguan

NeumayerStation

Mt Kenya

PolarCircle

40

0

40

80

40

0

40

80

120160 80 40 0 40 80 120 160

GAW

GAW

GAW

GAW

GAW

Efforts to Date

Collation of databases:

All available EMEP, GAW and IMPROVE data downloaded to NUIG.

Analysis for particular data/parameter coverage (on-going)

Registration on GEMS-MARS system

Development of MARS decoder and extraction software for extracting model aerosol fields for comparison with databases.

Identification of ‘clean-air’ periods over NE Atlantic (Mace Head) for comparison of model sea-salt distributions:

(1) Near daily 24-hour PM10 sea-salt

(2) Weekly samples of size segregated sea-salt fields

Initial Sea-Salt Mass Comparison – N. Atlantic

Sea Spray Chemistry over the North East Atlantic

mas

s fr

actio

n(%

)

10

20

30

40

50

60

70

80

90

100

mas

s(µg

/m3 )

1

2

3

4

5

6

7

8

9

10sea-salt NH4 nss-SO4 NO3 WSOC WIOC BC

not d

etec

tabl

e

SUMMER

D(µm)

0.06 0.125 0.25 0.5 1 2 4 8

mas

s fr

actio

n(%

)

0

10

20

30

40

50

60

70

80

90

100

mas

s(µg

/m3 )

0

1

2

3

4

5

6

7

8

9

10

(a) LBA period

(b) HBA period

Seasonality in aerosol mass over the North East Atlantic

Dp, µm

0.1 1 10

aero

sol m

ass,

dM

/dlo

gDp, µg

/m3

0.1

1

10

spring to autumnwinterMOUDI inlet D50

Dp, µm

2 3 4 5 61

10

20

30

40

50

Sea Spray Chemistry over the North East Atlantic

month

1 2 3 4 5 6 7 8 9 10 11 12

sea

salt

fine

mod

e co

ncen

tratio

n, µ

g/m

3

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

sea

salt

fine

mod

e co

ncen

tratio

n, µ

g/m

3

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

month

1 2 3 4 5 6 7 8 9 10 11 12

nss

sulp

hate

fine

mod

e co

ncen

tratio

n, µ

g/m

3

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

nss

sulp

hate

fine

mod

e co

ncen

tratio

n, µ

g/m

3

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

month

1 2 3 4 5 6 7 8 9 10 11 12

TC fi

ne m

ode

conc

entra

tion,

µgC

/m3

0.0

0.2

0.4

0.6

0.8

1.0

1.2

TC fi

ne m

ode

conc

entra

tion,

µgC

/m3

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Aerosol Scattering over the North East Atlantic

Scat

terin

g co

effic

ient

(m-1

)

5.0e-6

1.0e-5

1.5e-5

2.0e-5

2.5e-5

3.0e-5

3.5e-5

Month1 2 3 4 5 6 7 8 9 10 11 12

0.0

5.0e-6

1.0e-5

1.5e-5

2.0e-5

2.5e-5

3.0e-5

3.5e-5

Ang

stro

m e

xpon

ent

0.0

0.5

1.0

1.5

2.0

Month1 2 3 4 5 6 7 8 9 10 11 12

0.0

0.5

1.0

1.5

2.0

In-Situ Sea Spray Fluxes over the North East Atlantic

Sea Spray Chemistry over the North East Atlantic

http://www.empa.ch/gaw/gawsis/default.asp

and selecting by parameter [Aerosol] Mass (major inorganic components)

The Contributing stations are

Gaw Global Stations

Amsterdamn IslandCape Grim Mace Head Mauna Loa AlertJungfraujoch

Then there seems to be a few GAW Regional Stations such as

such as UTO, SNIEZKA, K-PUSTA,Anmyeon-do, Saturna Island, Kejimkujik lebaExperimental Lakes area, Esther and Algoma