Explosions in the lower and middle atmosphere: The spherically symmetrical stage

The laws of evolution of spherically symmetrical explosions with a high initial energy concentration in the atmosphere at heights from 0 to 90 km are investigated. The processes of initial energy release are ignored, and the explosion is assumed to be massless, i.e., the initial data are specified in the form of a uniformly heated sphere with a constant air density. The results are obtained by radiative gasdynamic numerical calculations in the range of explosive energies from 4.2 $\cdot$ 10$^{12}$ J to 4.2 $\cdot$ 10$^{16}$ J.