This fig shows which bins in the ACC channel are over- (red) and underrepresented (blue) in particle counts after forward and backward integration. Esp Runge-Kutta 4 (with dt = 10 mins, which is on the shorter end of typical sims) shows significant biases with stationary and time-evolving flows.

(2/2) We track DIC changes over a year and split these into biogeochemical and mixing contributions. For 4 pathways, we compute magnitudes and timescales at which BGC and mixing alter DIC. Mixing during subduction changes DIC in a parcels the most, but most parcels persist in NASTMW over the year.