The rate coefficients for the removal of O-2((1)Sigma(g)(+)) (from now on referred to as O-2((1)Sigma)) by H-2 were measured between 209 and 373 K by generating O-2((1)Sigma) via pulsed, laser excitation near 762 nm. The rate coefficient was determined to be k(1) = (6:8 +/- 1.2) x 10(-12) exp[-(590 +/-52)/T] cm(3) molecule(-1) s(-1). Reaction of O-2((1)Sigma) with O-3 yielded O(P-3); which was detected by vacuum ultraviolet (VUV)-resonance fluorescence. O-2((1)Sigma) was also prepared by the interaction of O(ID) with O-2. In separate experiments, the yield for OH from the title reaction was measured to be <4 x 10(-5) at 298 and 209 K. This upper limit was used in a one-dimensional atmospheric model to show that the contribution of this reaction to the total OH production in the atmosphere is minimal under most conditions.