The cold and fresh upper water column of the Arctic Ocean (AO) is separated from warm and saline subsurface Atlantic Waters (AW) by the strong vertical stratification. Recent rapid declining of sea ice and increasing storms in the region makes the AO more vul nerable to the vertical mixing. Here we report significant impact of storms on the re-distribution of AW in an Arctic fjord, Kongsfjorden, using the hydrography observations and numerical simulations. During storm events high-frequency currents and near-inertial waves are observed which induce large vertical shear in the water column. This leads to enhanced vertical mixing, re-distributing subsurface AW and warming of the mixed layer. Near inertial wave induced mixing also leads to enhanced primary productivity in the upper water column. Numerical experiments further confirm the role of storms in inducing vertical mixing and resulting mixed layer warming. This study also points out the possible impact of near-inertial waves on the primary productivity in the fjords in ice-free condition. The findings of the study indicates that storm induced vertical re-distribution of AW in the AO can become more important in future with declining sea ice cover and increasing storm activity in the Arctic.