Temperature dependence of CO2-enhanced primary production in the European Arctic Ocean, supplement to: Holding, Johnna; Duarte, Carlos Manuel; Sanz-Martín, Marina; Mesa, E; Arrieta, J M; Chierici, Melissa; Hendriks, Iris; García-Corral, Lara S; Regaudie-de-Gioux, Aurore; Delgado, A; Reigstad, Marit; Wassmann, P; Agustí, Susana (2015): Temperature dependence of CO2-enhanced primary production in the European Arctic Ocean. Nature Climate Change, 5(12), 1079-1082

• Main Authors: Holding, Johnna, Duarte, Carlos Manuel, Sanz-Martín, Marina, Mesa, E, Arrieta, J M, Chierici, Melissa, Hendriks, Iris, García-Corral, Lara S, Regaudie-de-Gioux, Aurore, Delgado, A, Reigstad, Marit, Wassmann, P, Agustí, Susana
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2015
• Subjects: Arctic; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Entire community; Laboratory experiment; Pelagos; Polar; Primary production/Photosynthesis; Event label; Type; Experiment; Temperature, water; Temperature, water, standard error; pH; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon, inorganic, dissolved; Phosphate; Silicate; Nitrate and Nitrite; Chlorophyll a; Chlorophyll a, standard error; Gross primary production of oxygen; Gross primary production, standard deviation; Gross primary production of oxygen per chlorophyll a; Salinity; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Calcite saturation state; Potentiometric titration; Calculated using CO2SYS; Coulometric titration; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Arctic Ocean; Corral; Duarte; Climate change; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.860530; https://doi.pangaea.de/10.1594/PANGAEA.860530

The Arctic Ocean is warming at two to three times the global rate and is perceived to be a bellwether for ocean acidification. Increased CO2 concentrations are expected to have a fertilization effect on marine autotrophs, and higher temperatures should lead to increased rates of planktonic primary production. Yet, simultaneous assessment of warming and increased CO2 on primary production in the Arctic has not been conducted. Here we test the expectation that CO2-enhanced gross primary production (GPP) may be temperature dependent, using data from several oceanographic cruises and experiments from both spring and summer in the European sector of the Arctic Ocean. Results confirm that CO2 enhances GPP (by a factor of up to ten) over a range of 145-2,099 µatm; however, the greatest effects are observed only at lower temperatures and are constrained by nutrient and light availability to the spring period. The temperature dependence of CO2-enhanced primary production has significant implications for metabolic balance in a warmer, CO2-enriched Arctic Ocean in the future. In particular, it indicates that a twofold increase in primary production during the spring is likely in the Arctic. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 2016-05-16.