Derivation of Aerosol Composition from Space

A contribution to ACCENT-TROPOSAT-2, Task Group 1

Thomas Holzer-Popp

DLR, Deutsches Fernerkundungsdatenzentrum (DFD), Oberpfaffenhofen, D-82234 Wessling
Tel.:  +49-(0)8153-28 1382
Fax:  +49-(0)8153-28 1363

Within the framework of the TROPOSAT programme a number of contributions are envisaged.

Improvement of synergetic methodology for the exploitation of a radiometer-spectrometer sensor pair (GOME/ATSR-2, SCIAMACHY/AATSR, GOME-2/AVHRR) to derive aerosol parameters from space over land and ocean. The focus is on retrieval of spectral aerosol optical thickness and estimating the type of aerosols. The latter is determined from a choice of predefined mixtures built up from a set of basic aerosol components (sulphate/nitrate, minerals, sea salt, soot). Validation of the retrieved type information using ADRIEX measurements.

Application of the synergetic aerosol retrieval to produce monthly/seasonal/annual means of optical thickness of the basic components over Europe/Africa (MSG viewing area) and globally. Demonstration of near-real time production of aerosol maps and intercomparison/validation with other satellite and ground-based aerosol observations.

Investigation of the potential to derive near-surface aerosol concentrations (PM10, PM2.5, PM1) by combining the satellite derived aerosol optical thickness and type (as an estimate of the size distribution) with a climatology of the vertical aerosol structure from a lidar network (EARLINET). Validation of PM values with ground-based in situ network data.

Demonstration of assimilating component-wise aerosol optical thickness into the EURAD/MADE chemistry-transport model (RIU). By relying on component-wise satellite aerosol information the level of ambiguity is lower than when assimilating total aerosol into a model with particle speciation.

Time schedule

 

2004

2005

2006

2007

2008

2008

Activity 1

*

*

*

 

 

 

Activity 2

 

*

*

*

 

 

Activity 3

 

 

*

*

*

 

Activity 4

 

*

*

*

*

*

Aims for the first 18 months

    ·   Provision of validated AOD and type products over Europe/Africa (MSG area)

·   Provision of 1-year climatology of component-wise AOD over Europe/Africa

Long term goals

·   Global extension of AOD/type products

·   Multi-annual climatology of component-wise AOD

·   Evaluation of satellite-based PM products and necessary auxiliary input

·   Assimilation of component-wise AOD into EURAD/MADE-CTM

Approximate manpower and cost

 

2004

2005

2006

2007

2008

2008

Personnel / man-years

0.25

1.0

1.0

1.0

1.0

0.75

Yearly cost (kECU)

33

130

130

130

130

97

Likely funding agencies

DFG (0.5 PY/Y awarded 2004-2006), ESA (DUE-GlobAER), internal funds (DLR)

Co-workers

Marion Schroedter-Homscheidt
DLR-DFD
 

Charulata Barge
DLR-DFD

Dr. Hendrik Elbern
Rheinisches Institut für Umweltforschung

          An der Universität zu Köln

          Aachener Str. 201 - 209

          50931 Köln
 

 


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