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Solar oscillations are expected to be excited by turbulent flows in theintergranular lanes near the solar surface. Time series recorded by the IMaXinstrument aboard the {\sc Sunrise} observatory reveal solar oscillations athigh resolution, which allow studying the properties of oscillations with shortwavelengths. We analyze two times series with synchronous recordings of Dopplervelocity and continuum intensity images with durations of 32\thinspace min and23\thinspace min, resp., recorded close to the disk center of the Sun to studythe propagation and excitation of solar acoustic oscillations. In the Dopplervelocity data, both the standing acoustic waves and the short-lived,high-degree running waves are visible. The standing waves are visible astemporary enhancements of the amplitudes of the large-scale velocity field dueto the stochastic superposition of the acoustic waves. We focus on thehigh-degree small-scale waves by suitable filtering in the Fourier domain.Investigating the propagation and excitation of $f$- and $p_1$-modes with wavenumbers $k > 1.4$\thinspace 1/Mm we find that also exploding granulescontribute to the excitation of solar $p$-modes in addition to the contributionof intergranular lanes.

Surface waves in solar granulation observed with {\sc Sunrise}