FIGURE LEGENDS
FIGURE 1. Study area. Regional orography (m) from Global Land One-kilometer Base Elevation (GLOBE, (Hastings and Dunbar 1998)). Andean and Caribbean regions, in yellow and green respectively. GNIP Stations highlighted in dark blue dots.
FIGURE 2. Regional source of atmospheric moisture considered in the experimental setting for the FLEXPART model. We adopt source regions and names as [Hoyos et al., 2018]. Tropical North Pacific (TNP), Tropical South Pacific (TSP), Subtropical North Atlantic (STNA), Tropical North Atlantic (TNA), Tropical Atlantic (TA), Tropical South Atlantic (TSA), Caribbean Sea (CARS), Northern South America (NOSA, target region), Orinoco Basin (ORIC), Northern Amazon Basin (NAMZ), Southern Amazon Basin (SAMZ).
FIGURE 3: Qualitative summary of how hydrologic processes affect oxygen and hydrogen isotopic composition of rainwater. Pairs of δ18O and δ2H can be distributed along with the entire possible variation range, according to the depletion or enrichment of observations and the meteorological conditions of the atmospheric moisture sources.
FIGURE 4. Annual cycle of precipitation from observational data (black) from 1506 sampling points distributed as shown in a.) and estimations from the percentage of diagnostic precipitation accounted for FLEXPART (gray). b.) Caribbean and c.) Andean regions.
FIGURE 5. Annual cycle of precipitation contribution from the main Atlantic (a,d), Pacific (b,e) and terrestrial (c,f) sources. Top (bottom) panels for the Andean (Caribbean) region. Precipitation amount is estimated from percentage of contributions based on diagnostic precipitation.
FIGURE 6. Seasonal summary of Oceanic (Atlantic and Pacific) and terrestrial percentages of moisture contributions to the Andean (a) and Caribbean (b) regions.
FIGURE 7. Seasonal reconstruction of LMWL and Deuterium excess. Blue dashed lines correspond to GMWL. Green (orange) lines correspond to the LMWL in the Colombian Andean (Caribbean) region. Interpolation of seasonal D-excess is shown in the box located in the upper left.