In this photo, taken from linescanning aircraft at FL70, a violent pyro-convective event is seen. The plume in the centre of the image has the “cauliflower” texture that is diagnostic of violent pyro-convection. Note also the layer of dense smoke, which has separated out at the LCL.
Above the LCL, the latent heat of condensation released can contribute up to three times the energy of the fire. The expansion of the plume here is so vigorous that it is resisting mixing with the surrounding air.
Below the LCL, there is usually so much smoke that it is difficult to see a clear pattern.
Field Observer
When pyro-Cbs are created the view from afar is often the clearest. Above the smoke layer at the LCL, the cauliflower texture is clear even from 60km distance. This photo, from a helicopter near Tumut, looking towards Canberra, is the upwind face of the plume. An anvil may be just seen moving downwind away from the camera.
Event (15) Cloud in convection column collapses.
