ACE-ASIA Ronald H. Brown Radiosondes

During the ACE-AISA project radiosondes were launched from the deck of the RONALD BROWN at synoptic times, 00Z and 12Z.  Beginning around 1-April Radiosondes were also launch at extra times during daytime, at 03,04, 06 or 09Z.    The data from these radiosondes have been interpolated onto a 125m vertical grid using a piece-wise second order polynomial fit.  The regrided data have been used to make time height cross sections of relative humidity and winds.

5-day time height cross sections are available in the table below in the altitude ranges 0-5 Km and 0-12 Km.  The 0-5 Km plots are useful to look at boundary layer process and the 0-12 Km plots show most of the troposphere..

The horizontal wind vectors are plotted at 250 meter vertical resolution in the 0 to 5 km plots and with 500 m  resolution in the 0 to 12 km plots.  Arrows pointing down indicate  wind from the north, Arrows pointing right indicate wind from the west. The length of the standard wind vector at the bottom of the plot is 20 m/s.  The "tail" of the wind vector is at its data position in altitude-time space.  A number of the soundings had sections with no reported winds, these are indicated by a lack of wind vectors in the plots.  A few soundings had defective humidty sensors so that wind vectors are shown but no rh. The "time" of the sounding in these plots is the "synoptic" time.  The launch time was generally one hour and 15 minutes earlier, that is  the 12Z sounding generally started at 1045 UTC.
 

Five-Day Plots

Data Files