Global Simulation of SO2 Concentrations with Updated

Emission Inventory

Gan Luo, Fangqun Yu, Zifa Wang

Atmospheric Science Research Center, SUNY- Albany

Nansen-Zhu International Research Centre

Institute of Atmospheric Physics

Chinese Academy of Science

Introduction

Acidifying Gas Acid Rain

Precursory Atm. Particles

Global Dimming/Brightening?

CCN Cloud Precipitation?

Global Dimming/Brightening?

Fig. 5. Linear and second-order trends for (A) land areas only and (B) for oceans only. [Pinker, Science, 2005]

Fig. 2. the records covering the period 1992 to 2002 (B) clear-sky conditions (24). Units W mj2.[Wild, Science, 2005]

Surface Observations Satellite Observations

Sulfur Emission in GEOS-Chem

Recent Short-term Simulation: GEIA 1985 EDGAR 2000

What should we do if we want to make a long-term simulation?

Corrected Data(EPA, EMEP, TRACE-P)

EDGAR EDGAR 20002000

1985 Base Data

(Benkovitz, 1996)

1998 Scale Revise

(Park, 2004)

GEIA GEIA 19851985

GEOS-Chem

Olivier J.G.J. and J.J.M. Berdowski (2001a):Global emissions sources and sinks.

Updated Emission Inventory

EDGAR

1980 1990 1995 2000

LinearInterpolation

Long-term Emission Series based on EDGAR

1980 1981 1982 1998 1999 2000……

GEIA, CGRERCorrect the Emission Database

Van Aardenne, et al. (2001):A High Resolution Dataset of

Historical Anth. Trace Gas Emissions for the Period 1890-

1990.

Anthropogenic Emission Trend

South America

North America Europe

Africa Middle Asia

East Asia

World

Oceania

South America

North America EuropeNorth America Europe

Africa Middle Asia

East AsiaEast Asia

WorldWorld

Oceania

Model Setting

Period: 1986~2005 (1986~1995)

GEOS-Chem Version: v7-03-06

Met field type: GEOS-4

Horizontal Resolution: 4x5

Type of Simulation: Full-chemistry

Emissions: Default setting

While the Sulfide Anthropogenic and Biofuel

Emission are Updated with New Inventory

Surface SO2: 1986-1995

(a) SO2 Sfc. 1986 (ppb) (b) SO2 Sfc. 1990 (ppb) (c) SO2 Sfc. 1995 (ppb)

(d) 1990 - 1986 (ppb) (e) 1995 -1990 (ppb) (f) 1995 - 1986 (ppb)

(a) SO2 Sfc. 1986 (ppb) (b) SO2 Sfc. 1990 (ppb) (c) SO2 Sfc. 1995 (ppb)

(d) 1990 - 1986 (ppb) (e) 1995 -1990 (ppb) (f) 1995 - 1986 (ppb)

Surface Sulfate: 1986-1995

(a) Sulfate 1986 (ppb) (b) Sulfate 1990 (ppb) (c) Sulfate 1995 (ppb)

(d) 1990 - 1986 (ppb) (e) 1995 -1990 (ppb) (f) 1995 - 1986 (ppb)

(a) Sulfate 1986 (ppb) (b) Sulfate 1990 (ppb) (c) Sulfate 1995 (ppb)

(d) 1990 - 1986 (ppb) (e) 1995 -1990 (ppb) (f) 1995 - 1986 (ppb)

Comparison with Observation

1

14

3

2

2

3

4

WDCGG StationsWDCGG Stations

Comparison with Observation

WDCGG StationsWDCGG Stations

1

3

2

4

1

3

2

4

Discussions

Geography Information System

10 Years Series of Surface SO2

10 Years Series of Aerosol Optical Depth

10 Years Series: Surface SO2

10 Years Series: AOD

10 Years Series: AOD

Summary

New sulfide inventory has been used in GEOS-Chem to study the long-term variations of SO2 and sulfate

Emission trend (New vs. Old)

Total-N=Total-O; Corrected (Asia, NA); Detailed (Europe)

Simulated 10-year variations of SO2 concentrations are compared with WDCGG stations measurements, and it indicates that the model results are reasonable.

SO2 emission reduction is very significant in Europe since 1990 and we find that sulfate and total AOD over Europe has a clear downward trend since 1990. This may contribute to the observed brightening for stations in Europe.

Future

Long-term (1986-2005) SO2, sulfate AOD

Trend, comparisons with available

measurements.

Coupled with nucleation and growth

module to study the long-term change in

particle formation and CCN abundance.

The End

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