Tsao, Shou-EnShou-EnTsaoShen, Po-YenPo-YenShenTseng, Chun-MaoChun-MaoTseng2025-11-172025-11-172024-11https://www.scopus.com/pages/publications/85208934503?origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/733698The partial pressure of CO2 (pCO2) and associated CO2 air-sea flux exhibit highly heterogeneous temporal and spatial patterns in ocean margins. In this study, we analyzed a three-year time-series of data sampled during 2011–2014 along the Kuroshio Current within the East China Sea (ECS) to investigate the seasonal pattern of carbonate chemistry and CO2 air-sea fluxes. Annually, the Kuroshio within the ECS operates as a net CO2 sink at approximately 1.3 mol C m−2 yr−1, less than estimates over the ECS shelf (∼1.8 mol C m−2 yr−1). The thermal control of pCO2 makes the Kuroshio a strong CO2 sink in winter, with a transition to net-neutral, or a weak CO2 source in summer. On an interannual basis, however, the seasonal CO2 air-sea fluxes in the Kuroshio may undergo shifts if warming conditions continue.East China SeaKuroshio CurrentPacific OceanAir sea fluxAir-sea exchangeCarbon sinkCO2 fluxesKuroshioKuroshio currentOcean carbon sinkPressure of CO2Seasonal variationair-sea interactioncarbon dioxidecarbon fluxcarbon sinkseasonal variation[SDGs]SDG13[SDGs]SDG14journal article10.1016/j.marchem.2024.104469