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.