The Arctic Oscillation Modulates the Interannual Variation in Particulate Organic Carbon Dispersal on the Eurasian Arctic Shelf
Description
The Arctic Oscillation (AO) affects river plume pathways and material supply by controlling the atmospheric circulation. We analyzed the interannual variation in particulate organic carbon (POC) and hydrological properties in the Eurasian Arctic shelf (EAS) during summer to examine the influence of the AO on POC pathways. Our results characterized the year-round alongshore/offshore distribution of highly depleted δ13C values in the Laptev Sea under various atmospheric conditions. We measured the concentrations of suspended particulate matter, POC and particulate nitrogen in different years on the EAS, and performed biogeochemical analyses (δ13C) and hydrological features in order to trace the pathways of POC associated with river plumes in coastal waters within different AO phases. The AO controls the alongshore/offshore transport of POC by regulating the pathways of plumes, highlighting the significance of the AO in the dynamics and fate of POC. The growing trend in the AO-positive phase potentially affects POC source-to-sink and ecosystem dynamics in the Arctic marginal seas.
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Funding
National Natural Science Foundation of China
42130412
National Natural Science Foundation of China
42076074
National Natural Science Foundation of China
42376068
Fundamental Research Funds for the Central Universities
202241001
Taishan Scholar Program
TSQN20182117
Russian Scientific Foundation
21-77-30001
Ministry of Science and Higher Education of the Russian Federation
124022100083-1
Ministry of Science and Higher Education of the Russian Federation
124022100084-8