Figure 8

(a) AERONET Version 3 Level 2.0 precipitable water vapor column at Medellin (blue), Quito (red), Huancayo (black), and La Paz (green). Colored dots are 1-h data, while solid lines are annual cycles from monthly means. Label indicates mean PW + /– 1 standard deviation (STD). (b) Solid lines are annual cycles from MERRA-2 Total precipitable water vapor monthly means from 2006 to 2022 and with same colors for each station as in (a). Dashed lines and stars are monthly means of cumulative precipitation from surface measurements. Periods of data availability for each case are indicated in the Methods.