Validation of SCIAMACHY CO, CH4, and CO2

A contribution to ACCENT-TROPOSAT-2, Task Group 3

Miranda van den Broek

SRON – National Institute for Space Research, Sorbonnelaan 2, NL 3584 CA Utrecht
Tel.:  +31-(0)30-2535625
Fax:  +31-(0)30-2540860

The validation of the SCIAMACHY CH4, CO, and CO2 total columns by comparing them to i) atmospheric chemistry model calculations (using the TM3 and TM5 models), ii) ground-based measurements, and iii) measurements by the EOS-TERRA instrument MOPITT. The comparison of the SCIAMACHY data with atmospheric chemistry model calculations gives a first qualitative validation of the retrieved products. The emphasis in such a comparison will be the detection of concentration gradients in space and time caused by strong emissions and/or atmospheric transport. Ground-based measurements from the NDSC network will be used to locally validate the SCIAMACHY total columns. Validation using the already partly validated MOPITT measurements will be done by comparing the SCIAMACHY and MOPITT (near) simultaneous co-located observations (see Figure 1). Extended global validation of non-co-located measurements will be achieved by the use of chemistry transport models data assimilations. Techniques will be developed to combine the information from all three validation methods to give an overall accuracy of the total column products. A close collaboration with the AT2 Task Group 1 proposal “Retrieval of SCIAMACHY CO, CH4, and CO2” will be employed.


 


 

 

 

 

Figure1: Global fields of monthly averaged SCIAMACHY CO retrieved with the IMLM algorithm for February 2004, compared with MOPITT CO for the same month.

18 months objectives

Comparison of SCIAMACHY CO, CH4 and CO2 total columns with atmospheric chemistry models and measurements from the MOPITT instrument for a couple of months in 2003/2004.

Time schedule

 

2004

2005

2006

2007

2008

2009

All Objectives

**

**

***

***

***

**

Approximate manpower and cost

 

2004

2005

2006

2007

2008

2009

Personnel / man-years

1

1

0.75

0.75

0.75

0.5

Yearly cost (kEuro)

65

65

50

50

50

35

Likely funding agencies

NIVR – Netherlands Agency for Aerospace Programmes, the SRON/NIVR National User Support Programme (SRON-GO), and the EU


Co-workers

Dr. Annemieke Gloudemans
         
SRON – National Institute for Space Research
          Sorbonnelaan 2
          3584 CA Utrecht, The Netherlands

 Dr. Maarten Krol
          Institute for Marine and Atmospheric research Utrecht (IMAU)
          PO box
80000
          3508 TA Utrecht, The Netherlands
         

Dr. Jan Fokke Meirink
            KNMI – Royal Netherlands Meteorological Institute
           
PO box 201
            3730 AE De Bilt, The Netherlands
           

 


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