Oslo CTM3

Oslo CTM3 – A global chemical transport model

Happy 2018! As I will soon start in a new job, this page will be moved somewhere else. I will no longer work on the Oslo CTM3, but perhaps a new website may surface at e.g. CICERO or UiO.

The Oslo CTM3 is an off-line global chemical transport model (CTM), maintained by Center for International Climate and Environmental Research – Oslo (CICERO).


The transport code is inherited from the CTM developed at the University of California, Irvine (UCI), while chemistry and aerosol modules mostly have been developed at the Department of Geosciences, University of Oslo (UiO). You find more about the different modules in the menu to the left.

A CTM is driven by external meteorological data, and the Oslo CTM3 has traditionally been driven by meteorological forecast data from the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecast System (IFS) model. Since late 2015 we use meteorological forecasts from the ECMWF OpenIFS model. You find more about this in the menu.

If you want to become a Oslo CTM3 user, or have other questions regarding the model, please contact CICERO, or you can send me an e-mail on asovde ® cicero oslo no, and I will try to answer or direct you to the proper place.

About this web site
This web site is a private initiative, set up to thoroughly document the Oslo CTM3. Hence, it is not an official web page.

Tue Jan 2 12:36:00 CET 2018 © Amund Søvde Haslerud