Improving Tropospheric Trace Gas Retrieval by combined UV-Vis Solar Backscatter and Thermal IR Sounding of the Atmosphere

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

Heinrich Bovensmann

University of Bremen, FB1, Institute of Environmental Physics / Remote Sensing (iup/ife)
Otto Hahn Allee 1, 28334 Bremen, Germany
Tel.:  +49-(0)421-218 4081
Fax:  +49-(0)421-218 4555
 

Despite the progress made in sounding tropospheric trace gas distributions like CO, NO2, SO2 etc. from space, no single passive measurement technique alone allows to determine profile information down to the planetary boundary layer (PBL). Retrieval of tropospheric distributions from nadir UV-VIS solar backscatter measurements has demonstrated the feasibility to determine tropospheric column concentrations of O3, CO, NO2, SO2, HCHO, H2O and CH4 including the PBL. Retrieval of tropospheric distributions from nadir thermal IR measurements has demonstrated the feasibility to determine concentration profiles of O3, CO, NO2, SO2, H2O and CH4 down to the free troposphere, but excluding the lowest troposphere and the PBL under most conditions due to the lack of thermal contrast. Within this project it is planned to improve the sounding of the troposphere incl. the lowermost troposphere down to the surface by a synergistic retrieval from a combination of solar backscattered measurements in the UV-VIS-SWIR (SCIAMACHY, OMI, GOME-2) with measurements of thermal emission in the mid infrared (MOPITT, TES, IASI). During the first 18 month of the project the retrieval environment will be set up and sensitivity studies will be performed. In the second phase of the project the methods will be applied to derive height resolved information in the troposphere from satellite data, for example by combining SCIAMACHY/OMI with TES data and/or GOME-2 with IASI data. The data will be validated to draw quantitative conclusions about the quality of the data from this new method.  

Time schedule

 

2004

2005

2006

2007

2008

2008

Sensitivity studies combined UV-VIS/IR retrieval and set-up of retrieval environment

*

*

*

 

 

 

Application to satellite data

 

 

*

*

*

 

Algorithm Improvements and Validation

 

 

 

*

*

*

Approximate manpower and cost

 

2004

2005

2006

2007

2008

2008

Personnel / man-years

1.0

1.0

1.0

1.0

1.0

1.0

Yearly cost (k)

60

60

60

60

60

60

Likely funding agencies

National funding

Co-workers

Vladimir Rozanov and John P. Burrows, IUP Bremen

 


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