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The present study is specifically focused on the seasonal, annual and\udinter-annual variations of the refractive index structure parameter (Cn2)\udusing three years of radar observations. Energy dissipation rates\ud(ε) during different seasons for a particular year are also\udcomputed over a tropical station, Pune. Doppler spectral width measurements\udmade by the Wind Profiler, under various atmospheric conditions, are\udutilized to estimate the turbulence parameters. The refractive index\udstructure parameter varies from 10−17.5 to 10−13 m−2/3 under\udclear air to precipitation conditions in the height region of 1.05 to 10.35 km.\udDuring the monsoon months, observed Cn2 values are up to 1–2 orders\udof magnitude higher than those during pre-monsoon and post-monsoon seasons.\udSpectral width correction for various non-turbulent spectral broadenings\udsuch as beam broadening and shear broadening are made in the observed\udspectral width for reliable estimation of ε under\udnon-precipitating conditions. It is found that in the lower tropospheric\udheight region, values of ε are in the range of 10−6 to\ud10−3 m2 s−3. In summer and monsoon seasons the observed\udvalues of ε are larger than those in post-monsoon and winter\udseasons in the lower troposphere. A comparison of Cn2 observed with the\udwind profiler and that estimated using Radio Sonde/Radio Wind (RS/RW) data\udof nearby Met station Chikalthana has been made for the month of July 2003

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Seasonal, annual and inter-annual features of turbulence parameters over the tropical station Pune (18°32' N, 73°51' E) observed with UHF wind profiler