Integrated net primary production during POLARSTERN cruise ARK-XXVII/3 (IceArc) in 2012

• Main Authors: Fernández-Méndez, Mar, Peeken, Ilka, Boetius, Antje
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2014
• Subjects: Event label; Optional event label; Gear; Date/Time of event; Latitude of event; Longitude of event; Net primary production of carbon; Depth of the euphotic zone; Sea ice thickness; Melt pond depth; Short-wave downward GLOBAL radiation; CTD/Rosette; Ice station; Expendable CTD; Calculated; ARK-XXVII/3; Polarstern; Assessment of bacterial life and matter cycling in deep-sea surface sediments ABYSS; Arctic; ice core; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.834218; https://doi.pangaea.de/10.1594/PANGAEA.834218

Depth-integrated in situ rates were calculated for each environment as a function of the available photosynthetically active radiation (PAR). Irradiance profiles were calculated for each environment (sea ice, melt pond, water under the ice and open water) from the daily average incoming solar shortwave irradiance measured by a pyranometer (Kipp & Zonen, Delft, Netherland) mounted on the ship. We used light attenuation coefficients of 10 m**-1 for snow, 1.5 m**-1 for sea ice (Perovich, 1996) and 0.1 m**-1 for Atlantic-influenced Arctic seawater, based on literature values and observations during the cruise. Planar irradiance was transformed to scalar irradiance according to Ehn and Mundy (2013) and Katlein et al., (2014). Water column production was integrated over the euphotic zone (1% of incoming irradiance) and sea ice production over the ice core thickness. Melt pond coverage and sea ice concentration were taken into account when calculating the total primary production per area.