Geoscience Reference
In-Depth Information
Fig. 8. Vertical cross-section of vertical velocity (shading) in EL30 at y = 26 km in Fig. 7.
Contours are as in Fig. 5.
Fig. 9. As in Fig. 8 but with radial velocity observations contaminated by random noise.
As noted above, the use of the variational scheme removes the need to explicitly integrate
the mass continuity equation, thus eradicating the vertical propagation of errors in the
estimated wind field. Figure 9 shows the same vertical cross-section as in Fig. 8, but with
random errors added to the input radial velocities. The distribution of retrieved vertical
velocity is nearly identical in the cases with and without random errors. By contrast, the use
of an upward integration scheme without random noise generates an erroneous vertical
