  The ARIANNA in-ice radio detector explores the detection of UHE neutrinos
with shallow detector stations on the Ross Ice Shelf and the South Pole. Here,
we present recent results that lay the foundation for future large-scale
experiments. We show a limit on the UHE neutrino flux derived from ARIANNA
data, measurements of the more abundant air showers, results from in-situ
measurement campaigns, a study of a potential background from internal
reflection layers, and give an outlook of future detector improvements.
