Circulation Pathways and Exports of Arctic River Runoff Influenced by Atmospheric Circulation Regimes

River runoff supplies the Arctic Ocean with a large amount of freshwater and land-derived material, so it is important for both physical biogeochemical marine environment. In this study, we used wind perturbation simulations to elucidate response circulation pathways exports river different atmospheric regimes. Specifically, perturbations representing negative positive phases Oscillation Beaufort High modes were imposed over separately in sensitivity experiments. addition, some combinations two also considered By comparing these experiments control simulation, revealed impact perturbations. The regimes influence surface geostrophic currents through changing halosteric height, which associated changes spatial distribution freshwater. runoff, Pacific Atlantic derived waters are mainly determined by currents. (negative) reduces (increases) storage sea height Makarov Eurasian basins, thus strengthening (weakening) cyclonic weakening (strengthening) anticyclonic circulation; Accordingly, leaves Siberian shelf at more eastern (western) locations, has an enhanced export Fram Strait (Canadian Archipelago). increases (reduces) Amerasian Basin, Mackenzie Canadian Archipelago reduced (increased). available Gyre, can be efficiently accumulated there presence forcing. mode on location Transpolar Drift Stream stronger than neutral state. Our results showed that only have relatively small contribution accumulation Gyre region.