The phrase "high cirrus" refers to thin, wispy clouds that are located very high up in the atmosphere. They are often seen as thin, white strands or patches in the sky. Full definition
Chemically, there will be an increase in ozone depletion (due to increases in heterogenous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime. (treehugger.com)
Chemically, there will be an increase in ozone depletion (due to increases in heterogeneous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime. (realclimate.org)
Intense laser light pulses increase the brightness of high cirrus clouds. (sciencedaily.com)