Infrared Satellite Observations for the Study of Tropospheric Composition 

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

Cathy Clerbaux

Institut Pierre Simon Laplace, Service d'Aéronomie, Université Pierre et Marie Curie
4, place Jussieu, Box 102  75252 Paris Cedex 05
Tel.:  +33-(0)1 44273221
Fax:  +33-(0)1 44273776

The proposal aims to use the scientific tools currently developed at IPSL in the framework of the preparation of the IASI/METOP mission to access the performance of current (MOPITT, AIRS, TES) and future instruments that use the thermal infrared spectral range to sound the troposphere.

It will include the development and improvement of retrieval algorithms (based on various minimization techniques) to inverse the trace gases concentrations from the radiance observations, and the characterization of retrieved products in terms of accuracy and vertical sensitivity (see Figure 1).

The potential of forthcoming instruments to improve the current measurement capabilities will be evaluated using radiative transfer simulations and inversion algorithms.

The synergetic use of infrared measurement and UV/VIS data (e.g. IASI and GOME2) to improve the vertical resolution achievable will be investigated for ozone.  

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1. These composite images depict the MOPITT CO measurements at an altitude of 850 hPa. The seasonal plots show the observations (high CO values are in red) averaged over 4 years (March 2000-February 2004) of MOPITT operation. In the Northern hemisphere, most of the pollution is associated with urban activity, with persistent high values above China and elevate levels over US, Europe and Asia in spring and winter. In the tropics and Southern hemisphere, most of the CO is emitted where biomass burning occurs, such as in Africa, Central and South America (following the seasonal shift in the Inter-Tropical Convergence Zone). The CO pollution plumes emitted locally spread from regional to global scales, depending on meteorological conditions and photochemistry

Time schedule

 

2004

2005

2006

2007

2008

2009

Activity 1

***

***

***

**

*

 

Activity 2

*

*

*

*

*

*

Activity 3

*

**

***

***

**

**

Activity 4

*

**

***

***

**

**

Approximate manpower and cost

 

2004

2005

2006

2007

2008

2009

Personnel / man-years

2

3

3

3

2

2

Yearly cost (kEuro)

15

20

20

20

15

15

Likely funding agencies

Programme National Chimie Atmosphérique (PNCA), CNES (TOSCA).

Co-workers

Dr. Juliette Hadji-Lazaro, Service d’Aéronomie, IPSL, France.

Dr. Solène Turquety, Service d’Aéronomie, IPSL, France.

Dr. Pierre Coheur, Spectroscopie de l’Atmosphère, Chimie Quantique et Photophysique, ULB, Belgium.

 


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