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Alfvenic waves are thought to play an important role in coronal heating andsolar wind acceleration. Here we investigate the dissipation of standing Alfvenwaves due to phase mixing at the presence of steady flow and sheared magneticfield in the stratified atmosphere of solar spicules. The transition regionbetween chromosphere and corona has also been considered. The initial flow isassumed to be directed along spicule axis, and the equilibrium magnetic fieldis taken 2-dimensional and divergence-free. It is determined that in contrastto propagating Alfven waves, standing Alfven waves dissipate in time ratherthan in space. Density gradients and sheared magnetic fields can enhancedamping due to phase mixing. Damping times deduced from our numericalcalculations are in good agreement with spicule lifetimes. Since spicules areshort living and transient structures, such a fast dissipation mechanism isneeded to transport their energy to the corona.

On the role of transition region on the Alfven wave phase mixing in solar spicules