Climate change laugh of the day

 In his article "Solar Geoengineering: Ineffective, Risky, and Unnecessary", Dr. Jonathan  Foley writes:

"What is Solar Geoengineering?  The basic idea is to manipulate the amount of sunshine hitting the Earth, reflecting some of it back to space. This is supposed to cool the planet just enough to counteract the warming effects of rising greenhouse gases."

"There are several ways to reflect sunlight. We could place big mirrors in orbit or in a stable position between the Earth and the Sun. But the most frequently discussed option is to inject aerosols into the stratosphere, the layer of air that resides about 10 to 50 kilometers above the surface. These aerosols would scatter some sunlight striking the Earth, reflecting it to space."

and finally:

" . . . Because aerosols reflect solar radiation, they are more effective during the day, during the summer . . ."

Umm, Isn't half the planet always exposed to the sun?  Doesn't that ruin the day-night and summer-winter issue?