(Table 1) Chlorophyll a content and microalgae abundance and biovolume in pack ice in the Bellingshausen Sea ...

• Main Authors: Fritsen, Christian H, Wirthlin, Eric D, Momberg, Diane K, Lewis, Michael J, Ackley, Stephen F
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Site; DATE/TIME; Sea ice thickness; Snow thickness; Chlorophyll a, areal concentration; Chlorophyll a; Bacillariophyceae; Dinophyceae; Heterotrichea; Haptophyta; Multiple investigations; Spectrophotometer; NBP0709; Nathaniel B. Palmer; International Polar Year 2007-2008 IPY; Antarc*; Antarctic; Bellingshausen Sea; International Polar Year; IPY; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.810069; https://doi.pangaea.de/10.1594/PANGAEA.810069

Pack ice in the Bellingshausen Sea contained moderate to high stocks of microalgal biomass (3-10 mg Chl a/m**2) spanning the range of general sea-ice microalgal microhabitats (e.g., bottom, interior and surface) during the International Polar Year (IPY) Sea Ice Mass Balance in the Antarctic (SIMBA) studies. Measurements of irradiance above and beneath the ice as well as optical properties of the microalgae therein demonstrated that absorption of photosynthetically active radiation (PAR) by particulates (microalgae and detritus) had a substantial influence on attenuation of PAR and irradiance transmission in areas with moderate snow covers (0.2-0.3 m) and more moderate effects in areas with low snow cover. Particulates contributed an estimated 25 to 90% of the attenuation coefficients for the first-year sea ice at wavelengths less than 500 nm. Strong ultraviolet radiation (UVR) absorption by particulates was prevalent in the ice habitats where solar radiation was highest - with absorption coefficients by ice ... : Weighted average Chl a concentration was originally given in mg/m**3 and was converted into µg/cm**3 by dividing by 1000. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...