A&WMA International Specialty Conference, May 10-14, 2010, Xi’an, Shaanxi Province, China

Leapfrogging Opportunities for Air Quality Improvement

Air Pollution Pattern and Trends Over China:

An exploration of theSatellite and Surface Observations

R. B. Husar, L. Du and E.M. RobinsonWashington University, St. Louis, MO, USA

Satellites show the synoptic aerosol patternand provide rich spatial context …

e.g. pollution in valleys.

Jan 10, 2003, SeaWiFS Dec 19, 2007, MODIS

The Perfect Dust Storm…Apr. 7, 2001 SaeWiFS

Population density

Emissions - NOx

Satellite Column Concentration: NO2, 2005

OMI Spectrometer Sensor

Satellite Column Concentration: NO2, 2009

OMI Spectrometer Sensor

OMI NO2 – Seasonal NO2

Dec, Jan, Feb

Jun, Jul, Aug

Mar, Apr, May

Sep, Oct, Nov

OMI NO2 Day of Week: Thursday

OMI NO2 Day of Week: Sunday

Emissions – SO2

OMI SO2: Dec, Jan, Feb OMI SO2: Jun, Jul, Aug

OMI SO2: Thursday

OMI SO2: Sunday

Aerosol AOT – MODISJanuary April

OctoberJuly

MODIS4 AOT: Thursday

MODIS4 AOT: Sunday

MODIS4 AOT: Thursday

MODIS4 AOT: Sunday

MODIS Fire Pixels

OMI Absorbing Aerosol Index

January April

OctoberJuly

OMI CHCO Formaldehyde

January April

OctoberJuly

Visibility is recorded at 7000+ stations hourly

Surface Extionction Coefficient

January

October

July

Shanghai

Sichuan Basin

Chengdu

Chengdu

Jun, Jul, Aug Chongqing

ChongqingDec, Jan, Feb

Binhai, Tanjin

Binhai

Binhai

Jun, Jul, Aug Tianjin

TianjinDec, Jan, Feb

Xi’an

Xi’an

Xi’an

Jun, Jul, Aug Tianjin

TianjinDec, Jan, Feb

New International Program (China is key formal participant):

Global Observing System of Systems (GEOSS)

Pooling of observations

Building New Things