Brewer–Dobson Circulation: Recent-Past and Near-Future Trends Simulated by Chemistry-Climate Models

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Experiments</td><td class="align_center">SH downwelling</td><td class="align_center">Tropical upwelling</td><td class="align_center">NH downwelling</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">REF</td><td class="align_center">−1.62</td><td class="align_center">+8.68</td><td class="align_center">−7.10</td></tr><tr><td class="align_left">OZONE2000</td><td class="align_center">−1.88 (+16.0%)</td><td class="align_center">+8.91 (+2.6%)</td><td class="align_center">−7.07 (–0.4%)</td></tr><tr><td class="align_left">GHG2000</td><td class="align_center">−1.71 (+5.5%)</td><td class="align_center">+9.04 (+4.1%)</td><td class="align_center">−7.38 (+3.9%)</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The DJF mass flux (units: 10<sup>9</sup> kg s<sup>–1</sup>) at 72 hPa in the different experiments. Positive and negative values denote upward and downward mass flux, respectively. Percentage changes of the mass flux (in parentheses) caused by ozone or GHGs changes in the different experiments are estimated relative to that of the control run, REF.

Advances in Meteorology

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Table 3

Table 3: Brewer–Dobson Circulation: Recent-Past and Near-Future Trends Simulated by Chemistry-Climate Models 