Global Observables at PHENIX

We present PHENIX recent results on charged particle and transverse energy densities measured at mid-rapidity in Au-Au collisions at $\sqrt{s_{{}_{NN}}}$=130 GeV and 200 GeV over broad range of centralities. The mean transverse energy per charged particle is derived. The first PHENIX measurements at $\sqrt{s_{{}_{NN}}}$=19.6 GeV are also presented. A comparison with calculations from various theoretical models is performed.