The Arctic Oscillation Modulates the Interannual Variation in Particulate Organic Carbon Dispersal on the Eurasian Arctic Shelf

Published: 25 March 2024| Version 1 | DOI: 10.17632/jgzmzh4nr9.1
Contributors:
jialong luo,

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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Institutions

Ocean University of China

Categories

Carbon, Arctic Sea, Particulate Organic Matter

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

Licence