Data from: Primary production calculations for sea ice from bio-optical observations in the Baltic Sea ...
Bio-optics is a powerful approach for estimating photosynthesis rates, but has seldom been applied to sea ice, where measuring photosynthesis is a challenge. We measured absorption coefficients of chromophoric dissolved organic matter (CDOM), algae, and non-algal particles along with solar radiation...
| Main Authors: | , , , , , , |
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| Format: | Dataset |
| Language: | English |
| Published: |
Dryad
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.7k1gf https://datadryad.org/stash/dataset/doi:10.5061/dryad.7k1gf |
| Summary: | Bio-optics is a powerful approach for estimating photosynthesis rates, but has seldom been applied to sea ice, where measuring photosynthesis is a challenge. We measured absorption coefficients of chromophoric dissolved organic matter (CDOM), algae, and non-algal particles along with solar radiation, albedo and transmittance at four sea-ice stations in the Gulf of Finland, Baltic Sea. This unique compilation of optical and biological data for Baltic Sea ice was used to build a radiative transfer model describing the light field and the light absorption by algae in 1-cm increments. The maximum quantum yields and photoadaptation of photosynthesis were determined from 14C-incorporation in photosynthetic-irradiance experiments using melted ice. The quantum yields were applied to the radiative transfer model estimating the rate of photosynthesis based on incident solar irradiance measured at 1-min intervals. The calculated depth-integrated mean primary production was 5 mg C m–2 d–1 for the surface layer (0–20 cm ... : Müller et al. 2016The data file provides the background data used for the calculation of primary production in sea ice. There are different sheets, giving general information about the ice and the weather conditions, absorption data for CDOM and particles, biogeochemical properties such as salinity, pH or Chlorophyll a. The light conditions are described by the data in this file in the PAR sheet giving the measured PAR values for one of the stations (St.3) and the typical conditions in mean March in the Gulf of Finland, as further explained in the publication. For these two cases, also the calculated surface light spectrum is given. The PI sheet provides the results of the incubation experiment, giving the 14C that was taken up by each treatment and the corresponding irradiance (see publication for details). For further data, such as the model results (for certain ice layers f.ex.) or the model code, please contact the first author. ... |
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