Applications - Surface Based Remote Sensing of the Atmospheric Boundary Layer - page 112

Fig. 4.25 Time-height cross section of mixing ratio from AERI measurements ( colours and
labelled lines ). Horizontal wind arrows are from additional 404 MHz wind profiler soundings
(from Feltz et al. 2003 )
water vapour profiles by ground-based FTIR (Fourier Transform Infrared) experi-
ments is given in Schneider and Hase ( 2009 ). The methods discussed in this review
are: a fit of a variety of different water vapour lines with different strength, a log-
arithmic scale inversion, a speed-dependent Voigt line shape model, and a joint
temperature profile retrieval.
4.3.3.5 Micro Rain RADAR Measurements
So far, measurements of gaseous humidity have been presented. Figure 4.26 now
gives an example for micro rain RADAR measurements. Figure 4.26a shows a
waterfall presentation of the spectral RADAR reflectivity versus Doppler frequency
Fig. 4.26 Micro rain radar measurement example. a : Waterfall presentation of rawDoppler spectra
of radar reflectivity averaged over 1 min from 100 to 1500 m. The height resolution is 50 m. The
z e -calibration is given by the arrow in top of the figure. — b : Profiles of radar reflectivity Z e .— c :
Mean fall velocity v m .— d : Rain rate R . — The melting level at 1100 m appears as a peak of Z e
(bright band), as a step of v m and as a peak of the apparent rain rate R , respectively. From Peters
et al. ( 2002 )