We use a coupled map lattice as a model for convected temperature fluc
tuations in the atmosphere above an ocean surface. We introduce a simp
le model for spatio-temporal bursting in a two-dimensional coupled map
lattice. Diffusion is controlled by the strength of the nearest-neigh
bor coupling of the lattice elements. This diffusion is modified to ta
ke into account spatially preferential directions. and this spatial pr
eference is used to capture possible buoyancy effects. As diffusion an
d buoyancy are varied. convective spatio-temporal patterns are observe
d in the lattice.