Chlorophyll A and phaeopigments Nansen Legacy cruise 2022702 station SICE-K sea ice Chlorophyll A

This dataset is a collection of the acid-corrected chlorophyll A and phaeopigments measurements taken as part of the Nansen Legacy project (www.arvenetternansen.com), during the 2022 Winter gaps JC3 cruise. The data are from sea ice from station at SICE-K. Sea ice sampled with Kovacs corer on 2022-03-07T07:28:32Z at 29.2725°E and 80.1205°N. Sea ice cores were sectioned (water-ice interface 0-3cm, 3-10cm, 10-20cm, 20-30cm, 30-50cm, 50-top, etc. top-air interface) and for the lowermost 50 cm of the cores the matching segments of five ice cores were pooled for chlorophyll A and other parameters. All sea-ice core sections were melted in the dark and at 4 deg. C within 24–28 h, and 100 ml filtered seawater (<0.22 µm) was initially added per 1 cm section to reduce negative impacts related to osmotic stress. Measurements were corrected towards melted volume of ice as well as filtered seawater added. The values have been flipped around - so 0 is air-ice surface, and positive values mean increasing depth. Two concentrations of corrected chlorophyll A and phaeopigments are given if available: 1) total Chlorophyll A and 2) > 10µm .