Impacts of ocean acidification on sediment processes in shallow waters of the arctic ocean ...

• Main Authors: Gazeau, Frédéric, Van Rijswijk, P, Pozzato, L, Middelburg, Jack J
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Arctic; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Coast and continental shelf; Entire community; Laboratory experiment; Polar; Soft-bottom community; DATE/TIME; Core; DEPTH, sediment/rock; Size fraction 1.000-0.500 mm, 0.0-1.0 phi, coarse sand; Percentile 10; Percentile 90; Median, grain size; Peak area; Deviation; Size fraction < 0.016 mm; Size fraction < 0.002 mm, clay; Size fraction < 0.032 mm; Size fraction < 0.004 mm, clay; Size fraction < 0.050 mm; Size fraction < 0.063 mm, mud, silt+clay; Size fraction < 0.008 mm, clay; Size fraction 0.250-0.125 mm, 2.0-3.0 phi, fine sand; beta-Carotene, beta,beta-Carotene per unit sediment mass; Chlorophyll a per unit sediment mass; Chlorophyll a + pheophorbides per unit sediment mass; Chlorophyll b per unit sediment mass; Chlorophyll c per unit sediment mass; Diadinoxanthin per unit sediment mass; Diatoxanthin per unit sediment mass; Phaeophytin a per unit sediment mass; Phaeophytin a + allomer and isomer per unit sediment mass; Phaeophorbide a per unit sediment mass; Fucoxanthin per unit sediment mass; Neoxanthin per unit sediment mass; Peridinin per unit sediment mass; Violaxanthin per unit sediment mass; Zeaxanthin per unit sediment mass; Nitrogen, total; δ13C, particulate organic carbon; δ15N, particulate organic nitrogen; δ13C, total particulate carbon; Carbon, organic, total; Carbon, total; Date/time start; Date/time end; Identification; Arctic Ocean; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.834243; https://doi.pangaea.de/10.1594/PANGAEA.834243

Despite the important roles of shallow-water sediments in global biogeochemical cycling, the effects of ocean acidification on sedimentary processes have received relatively little attention. As high-latitude cold waters can absorb more CO2 and usually have a lower buffering capacity than warmer waters, acidification rates in these areas are faster than those in sub-tropical regions. The present study investigates the effects of ocean acidification on sediment composition, processes and sediment-water fluxes in an Arctic coastal system. Undisturbed sediment cores, exempt of large dwelling organisms, were collected, incubated for a period of 14 days, and subject to a gradient of pCO2 covering the range of values projected for the end of the century. On five occasions during the experimental period, the sediment cores were isolated for flux measurements (oxygen, alkalinity, dissolved inorganic carbon, ammonium, nitrate, nitrite, phosphate and silicate). At the end of the experimental period, denitrification ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-07-22. ...