Software: Radiative forcing of hypersonic trajectories

Kurzfassung

Radiative forcing of hypersonic aircraft trajectories The repository provides a Python package, an example and an executable to calculate the climate impact (stratosphere adjusted radiative forcing) of hypersonic aircraft trajectories. The radiative forcing of water vapour changes and ozone changes are calculated on the basis of water vapour, hydrogen and nitrogen oxide emissions. Origin of data The data the software is using is based on simulations with the Earth system model ECHAM5/MESSy Atmospheric Chemistry, abbreviated as EMAC. Here, ECHAM stands for European Centre HAMburg general circulation model and MESSy is short for Modular Earth Submodel System. Limitations Interpolation (30-38 km) and extrapolation 0-30 km are used. It is recommended to note the following: The class includes a function (drop_vertical_levels()) that drops emission in the troposphere or below specified altitude levels and excludes it from the climate calculation. Its use is strongly recommended. The climate impact of trajectories where the average flight altitude does not correspond to the typical hypersonic flight altitudes (about 24-40 km) should not be estimated. Meaningful results can be expected for the radiative effect of water vapour changes due to water vapour emissions. This explicitly excludes the radiative effect of water vapour changes due to hydrogen and nitrogen oxide emissions. Meaningful results can be expected for the radiative effect of ozone changes due to water vapour, hydrogen and nitrogen oxide emissions.