Sea ice biogeochemistry (nutrients, community composition, DMS/P, MeSH, VOC, Amines, TEP), PolarChange cruise Weddell Sea/WAP, March 2023

Dataset of biological and chemical measurements in sea ice (bulk ice), brine (br, sackhole), and surface seawater (SW) from the PolarChange (Aerosol Emissions in Changing Polar Environments) expedition conducted aboard the RV Hesperides around the Antarctic Peninsula in the Southern Ocean from February 14 to March 17, 2023, during the late austral summer. Biological parameters: Chl-a (µg/L), Total Bacteria (cells/mL), Total Virus (viruses/mL), Dinoflagellates <20µm (cysts+ cells) (cells/L), Dinoflagellates 20-40µm (cells/L), Dinoflagellates >40µm (cells/L), Total Dinoflagellates (cells/L), Diatom <20µm (cells/L), Diatom 20-40µm (cells/L), Diatom >40µm (cells/L), Total Diatom (cells/L), Ciliates (cells/L), Nanophytoplankton 2-7µm (cells/mL), Nanophytoplankton 7-15µm (cells/mL), Nanophytoplankton 15-20µm (cells/mL), Total Nanophytoplankton 2-20µm (cells/mL), Cryptomonas spp. (cells/mL). Note: "Nanophytoplankton" corresponds to the term "nano-size protists" in the text. Biogeochemistry: Particulate Organic Nitrogen (PON, µM), Particulate Organic Carbon (POC, µM), Nitrate (µM), Nitrite (µM), Ammonium (µM), Silicate (µM), Phosphate (µM), Transparent exopolymer particles TEP in XG equivalents (µg/L) Sulfur compounds: DMSP (nM), DMS (nM), MeSH (nM) Volatile Organic Carbon (VOC): Acetone (nM), Isoprene (nM), Benzene (nM), Toluene (nM), Xylene (nM) Amines (nM): Particulate trimethylamine (pTMA), dissolved trimethylamine (dTMA), dissolved dimethylamine (dDMA), particulate dimethylamine (pDMA), dissolved diethylamine (dDEA), dissolved monomethylamine (dMMA); average, SD and n.