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We report the generation of large coherent vortices via inverse energycascade in Faraday wave driven turbulence. The motion of floaters in theFaraday waves is three dimensional but its horizontal velocity fluctuationsshow unexpected similarity with two-dimensional turbulence. The inverse cascadeis detected by measuring frequency spectra of the Lagrangian velocity, and itis confirmed by computing the third moment of the horizontal velocityfluctuations. This is observed in deep water in a broad range of wavelengths.The results broaden the scope of recent findings on Faraday waves in thinlayers [A. von Kameke, \textit{et al.}, \textit{Phys. Rev. Lett.} \textbf{107},074502 (2011)].

Inverse energy cascade and emergence of large coherent vortices in turbulence driven by Faraday waves