Finally, based upon an injection rate of 2 x IO33 NO molecules/year due to reentry in the region from 60 to 90 km, an ambient loading of 4.7 x 1032 molecules and an approximate residence time of 4 days, the expected increase in the steady-state, globally averaged mesospheric NO concentrations is estimated to be 4%. Figure 1 Figure 2 Table 1 HLLV INJECTIONS ABOVE 56 KN
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