We found evidence for highly periodic dunes in a nearcoastal area of Dronning Maud Land, East Antarctica. Analysis of accumulation patterns, derived from groundpenetrating radar (GPR) internal layering, and GPS-based characteristics of surface topography, by means of auto-and cross-covariance, indicate quasi-harmonic oscillations of surface undulations, surface slope, and accumulation. The dunes occur at an elevation range of 1000- 1350 in with the dominant wavelength of 5 kin and undulations of ∼10 m. Accumulation and slope are anticorrelated at zero lag, with a mean annual accumulation of some 140 k M-2 yr-1 and variations on the order of ±100 kg M-2 yr-1. Our findings have implications for studies aiming at the mass balance of coastal areas in Antarctica. Copyright 2006 by the American Geophysical Union.