  Collision of equilibria with a splitting manifold has been locally studied,
but might also be a contributing factor to global bifurcations. In particular a
boundary collision can be coincident with collision of a virtual equilibrium
with a periodic orbit, giving an analogue to a homoclinic bifurcation. This
type of bifurcation is demonstrated in a nonsmooth climate application. Here we
describe the nonsmooth bifurcation structure, as well as the smooth bifurcation
structure for which the nonsmooth homoclinic bifurcation is a limiting case.
