Identification of Tropospheric Emissions Sources from Satellite Observations: Synergistic Use of Trace Gas Measurements
of NO2, HCHO, and SO2

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

Thierry Marbach

Institut für Umweltphysik, University of Heidelberg INF 229, D-69120 Heidelberg
Tel.:  +49-(0)6221 546530
Fax:  +49-(0)6221 546405

During recent years a new generation of UV/VIS satellite instrument was put in orbit which allows us to observe global distributions of several tropospheric trace gases like NO2, HCHO, and SO2. Since the atmospheric lifetimes of these gases are usually small (hours to days) these maps allow to investigate the global distribution of sources and their temporal changes. This is an important forward for the knowledge of the composition and evolution of the atmosphere, and the implication on socially relevant issues, such as climate, ecosystems or human health. In particular, the influence of tropospheric emissions on the atmospheric oxidation capacity is a driving parameter for the degradation of many atmospheric compounds (e.g. greenhouse gases or ozone).

Here we propose to test and improve current estimates on the global distributions of sources. First we will identify and assign the different known sources to the observed tropospheric trace gas distributions. Second, from the combined investigation of the different trace species we will characterize different types of sources due to their specific mix of emissions. In a third phase we will quantify the absolute emissions of selected sources from our satellite data. From a comparison of the satellite maps with atmospheric model results we will investigate in detail the quality of current emission inventories. In particular the last aspect requires tropospheric satellite data with largely improved accuracy. Therefore much emphasis of the current project is given to the improvement of atmospheric transfer modelling and cloud correction.

Time schedule

Tasks

2004

2005

2006

2007

2008

2009

Improvements of spectral analysis algorithms for GOME and SCIAMACHY

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Improved radiative transfer modelling. Correction of the effects of clouds and the vertical profile

 

*

*

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Start of the routine operation of homogenised data sets of tropospheric NO2, HCHO, and SO2 from GOME and SCIAMACHY

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Validation of the derived data sets using existing data from ground based and aircraft observations

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Charcterisation of different types of sources from the spatial and temporal distribution

 

 

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Correlation of the tropospheric trace gas data with results from other sensors (fire counts, lightning flash counts, etc.)

 

 

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Case studies to  determine the atmospheric lifetime trace gases

 

 

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Case studies for the quantification of absolute source strengths for the  different trace gases

 

 

 

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Approximate manpower and cost

 

2004

2005

2006

2007

2008

2009

Personnel / person-years

0.4

0.4

0.4

0.4

0.4

0.4

Yearly cost (kECU)

5

5

5

5

5

5

Likely funding agencies

BMBF, EU, DFG

Co-workers

Steffen Beirle

Dr. Thomas Wagner

Prof. Ulrich Platt
Institut für Umweltphysik, University of Heidelberg
INF 229, D-69120 Heidelberg
Germany

 

 

 

 

 

 

 

 

 

 

 

 

 


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