d="para0001">Numerical investigation of interaction of geostrophic and ageostrophic zonal flows.
dd><dt class="label">•dt><dd>d="para0002">Reduction of equatorial heat flux leads to inverted geostrophic zonal flow system.
dd><dt class="label">•dt><dd>d="para0003">Standard theoretical picture of zonal flow generation cannot explain these unexpected results.
dd><dt class="label">•dt><dd>d="para0004">Confirmed by a broad numerical parameter study.
dd>dl>