Technical Report

Intercomparison of Vaisala and Pishority radiosonde derived atmospheric boundary layer properties over the bay during CTCZ-Pilot, 2010

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Abstract

During the CTCZ-Pilot experiment, Vaisala and Pisharoty radiosondes were launched simultaneously on some days. It is for the first time that these two radiosondes have been launched together providing a good opportunity to compare their performance. In this paper, the basic parameters, namely temperature (T), relative humidity (RH), wind speed and wind direction along with the properties of the atmospheric boundary layer (ABL) derived from the two radiosndes that include ABL height, moist static energy (MSE) and specific humidity of the mixed layer air, are compared. It is observed that Pisharoty sonde temperature tends to be warmer than Vaisala sonde values above 5 km level. While the boundary layer heights are comparable, Pisharoty sonde underestimates mixed layer MSE and specific humidity on most occasions.

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