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| Jeansson, E.; Bellerby, R. G. J.; Skjelvan, I.; Frigstad, H.; Olafsdottir, S. R.; Olafsson, J.. |
| This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00 degrees N, 12.67 degrees W), for the years between 1993 and 2006. By comparing data of dissolved inorganic carbon (DIC) and nutrients in the surface layer (upper 100 m), and a sub-surface layer (100-200 m), we calculate monthly deficits in the surface, and use these to deduce the long-term mean surface layer fluxes that affect the deficits: vertical mixing, horizontal advection, air-sea exchange, and biological activity. The deficits show a clear seasonality with a minimum in winter, when the mixed layer is at the deepest, and a maximum in early autumn, when... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00256/36742/35343.pdf |
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| Frigstad, H.; Henson, S. A.; Hartman, S. E.; Omar, A. M.; Jeansson, E.; Cole, H.; Pebody, C.; Lampitt, R. S.. |
| In this study we present hydrography, biogeochemistry and sediment trap observations between 2003 and 2012 at Porcupine Abyssal Plain (PAP) sustained observatory in the Northeast Atlantic. The time series is valuable as it allows for investigation of the link between surface productivity and deep ocean carbon flux. The region is a perennial sink for CO2, with an average uptake of around 1.5 mmolm(-2) day(-1). The average monthly draw-downs of inorganic carbon and nitrogen were used to quantify the net community production (NCP) and new production. Seasonal NCP and new production were found to be 4.57 +/- 0.85 molCm(-2) and 0.37 +/- 0.14 molNm(-2), respectively. The C: N ratio was high (12) compared to the Redfield ratio (6.6), and the production calculated... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40491/39279.pdf |
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