FIGURE LEGENDS
Figure 1. Como Creek, Colorado. The star indicates the sampling location (40.0350 N, -105.5444 W), dashed line is the approximate watershed boundary and green shows the approximate tree line.
Figure 2. Time-series of Q (a), DOC (b) and NO3-N (c) from Como Creek. Colored lines are concentration, gray lines are mass flux (concentration x discharge).
Figure 3. C-Q plots of DOC (a) and NO3-N (b) exhibited clockwise hysteresis (dashed lines) over seasonal time scales. At the scale of events, enrichment of DOC (c,e,g) and NO3-N (d,f,h) typically lagged Q, producing counterclockwise hysteresis (shown as solid lines in a,b).
Figure 4. Onset and peak of 2020 melt pulse. A ROS event occurred on 30 May. While the volume of rainfall was relatively modest (12 mm), it produced a large increase in discharge (a). This resulted in enrichment of DOC and NO3-N concentrations (b).
Figure 5. Late baseflow 2020 showing diel variation in all stream parameters. On 8 Sep, early season snowfall occurred (17 mm SWE), which melted as air temperatures warmed on 10 Sep (a). The relatively small increase in Q produced a large, and prolonged enrichment of DOC and NO3-N concentrations (b). Axes scales are the same as for Figure 5, with the exception of Q, which is 250x larger.
Figure 6. Annual WY exhibited varying degrees of correlation with various metrics of precipitation and snowpack (a-d). Solute fluxes were in turn strongly correlated with WY (e,f). Colored points correspond to years with NEON sensor measurements, gray are historic LTER data.
Figure 7. Cumulative precipitation (a), snowpack depth (b), water yield (c) and DOC export (d).