|Introduction of Carbon monoxide|
|Carbon monoxide (CO) is an important trace gas constituent
of the Earth’s atmosphere. Despite its relatively small concentration,
CO plays an important role in atmospheric chemistry via its effect o
n the hydroxyl radical (OH) concentration. In case of high NOx, the reaction
of CO with OH leads to the formation of carbon dioxide and ozone, as shown
schematically in Eq.1- 6|
Furthermore, it has been proposed that CO emissions have a GWP (Global Warming Potential), although it does not absorb terrestrial infrared radiation strongly enough to be counted as a direct greenhouse gas. Because CO affects the lifetimes of other greenhouse gases by influencing the atmospheric burden of OH and thus can be considered to be an indirect greenhouse gas on the basis of its effect on the lifetime of other greenhouse gases.
|The ability to understand and predict future concentrations of global
carbon monoxide and its effect on the earth system depends on the knowledge of
the sources (emission estimates) and sinks. Therefore, the objective of this
research is to acquire the global distribution of carbon monoxide with SCIAMACHY
satellite near-infrared measurements and to compare it with climate chemistry models. |
Due to its high sensitivity to all atmospheric layers, the SCIAMACHY CO data set could be used to improve the existing CO emission inventories of climate chemistry models on a global scale.