My research interest is to investigate greenhouse gases in the atmosphere and the processes determining their abundance. The methods that I develop aim at improving our understanding and quantification of those processes, on global and regional scales, using atmospheric measurements and models. To improve the availability of measurements, I work together with colleagues at SRON Netherlands Institute for Space Research on the development of remote sensing techniques for measuring greenhouse gases and other related gases from Earth orbiting satellites. Currently, these actvities focus primarily on the greenhouse gases carbon dioxide (CO2) and methane (CH4). These gases are the first and second most important greenhouse gases emitted by human activities. Together they are responsible for 88% of the radiative forcing of the Earth's climate due to human produced long-lived greenhouse gases.