High-frequency Waves in Chromospheric Spicules

Using high cadence observations from the Hydrogen-alpha Rapid Dynamics camera imaging system on Dunn Solar Telescope, we present an investigation of statistical properties transverse oscillations in spicules captured above solar limb. At five equally separated atmospheric heights, spanning approximately 4900-7500 km, have detected a total 15 959 individual wave events, with mean displacement amplitude 151 +/- 124 period 54 45 s, and projected velocity 21 13 km s^-1. We find that both amplitudes increase height limb, ranging 132 111 17.7 10.6 s^-1 at 4900 168 125 26.3 14.1 7500 respectively. Following examination neighboring time space, 45% waves to be upwardly propagating, 49% downwardly 6% standing, absolute phase velocities for propagating order 75-150 While energy flux downwards does not appear depend height, decreases rate -13 200 6500 W m^-2 /Mm. As result, this decrease as propagate upwards may provide significant thermal input into local plasma.