1,721,163 research outputs found
Upwelling spectral radiance as measured in different depths at radiometer station PS71/267-3
No full textHigh resolution phytoplankton group Chlorophyll a data from high spectrally resolved radiometric underwater light transmission profiles obtained by an undulating platform towed behind the ship during POLARSTERN cruise PS113 in the Atlantic Ocean
No full textHigh resolution phytoplankton group Chlorophyll a data derived using transmission from high spectrally resolved radiometric underwater light profiles at discrete light stations obtained during POLARSTERN cruise PS113 in the Atlantic Ocean
No full textPhytoplankton group Chlorophyll a data derived using the mean diffuse attenuation over the first optical depth (kdmean) of the measured radiometric profile obtained during POLARSTERN cruise PS113 in the Atlantic Ocean
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Phytoplankton pigment concentration and phytoplankton groups measured on water samples obtained during POLARSTERN cruise PS113 in the Atlantic Ocean
No full textWe analysed water samples taken during the Polarstern PS113 cruise with HPLC technique to retrieve phytoplankton pigment concentrations. We further used these data to obtain major phytoplankton groups following the diagnostic pigment analysis. We also measured at discrete light stations (called Lightstations) and from an undulating platform towed behind the ship (called TRIAXUS stations) radiometric underwater light profiles high spectrally resolved. We obtained high resolution phytoplankton group Chla data from depth resolved apparent optical properties derived from the underwater radiation data by applying an empirical orthogonal function (EOF) analysis to the spectral data set and developing subsequently regression models using the pigment based phytoplankton group Chla and the selected EOF modes. Results were obtained from using depth resolved transmission data (Transmission) and also from using the mean diffuse attenuation over the first optical depth (kdmean) of the measured radiometric profile. All the details are described in the related publication by Bracher et al. (2020)
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