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Carbon monoxide (CO)
introduction

 
   
 
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page last modified:
23 January 2004
   
Product services of TEMIS: Contents of this page:

NOTE:
the data product Carbon monoxide has been removed
from the TEMIS project.

 


 

Carbon monoxide

Carbon monoxide, CO, is precursor gas for greenhouse gas number one, carbon dioxide (CO2), and it forms a key compound in tropospheric chemistry with a lifetime in order of months. Carbon monoxide has large influence on methane oxidation as part of the methane increase is related to increases in CO. Estimates of carbon monoxide sources (e.g. fossil fuels and biomass burning) show large uncertainties and variability.

Carbon monoxide is going to be a new product: it will be derived from SCIAMACHY near-infrared channels. What will be delivered are total carbon monoxide columns with an anticipated accuracy of about 10%. As the example below shows, the variability due to the uncertainties in the emissions is a 10-20%, and so detection of emissions is perhaps possible.
 

Model example

The following graph shows the result of an explicit modelling of carbon monoxide emissions for June 1997 in Dobson Units (DU). Note that the step between the contours 10 DU or about 10%.

 

modelled CO column, June 1997

 
The chemistry-transport model that produced the above image was run for 10 days, with the approriate meteorological information. And the same was done with a 50% increase in the emissions (in reality the variability of the emissions could even be larger). The following graphs shows the difference after 10 days between the carbon monoxide columns of these two model runs. Note that the scale runs up to 20 DU or 10% of the total carbon monoxide column as showns in the picture above. In other words, the variability in the carbon monoxide column due to uncertainties in the emissions is around 10%. (The rather high values above Central Afrika, South America and Asia are due to biomass burning events.)

 

CO column difference after 10 days