In general, laser radiation is attenuated as it propagates through the atmosphere. In addition, the laser beam is often broadened, defocused and may even be deflected from its initial propagation direction. These atmospheric effects have far-reaching consequences for the use of lasers in optical communication, weaponry, target designation, ranging, remote sensing, and other applications which require transmission of laser beams through the atmosphere.
"Atmospheric Propagation Of Laser Beams", Proc. SPIE 0547, Effects of the Environment on Systems Performance, (9 September 1985); doi: 10.1117/12.948390; https://doi.org/10.1117/12.948390