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On December 8, 2021 at 4:26:05 PM CST, claire Claire Herbert:

  • Changed value of field methodDescrioption to **2017 Churchill River and Mobile Ice Survey Ice core sampling protocol** Ice cores were collected using the 9 cm Mark II Kovacs core barrel in conjunction with teams 1, 3, and 4 from 2 mobile ice floes. Cores were bagged in core bags, labeled in the field, and transferred to CNSC. Cores were cut with a metal Japanese saw into 5 cm portions outside of the CNSC main building (ambient temperature < -20 °C) in order to prevent thawing. All edges of each core section were then trimmed with ceramic knives to remove ice that came into contact with the core barrel or the metal saw. Trimmed sections were double bagged in new Ziploc bags and kept at room temperature in order to melt. **2017 Nelson Estuary Landfast Ice Survey Ice core sampling protocol** Ice samples were collected using a 9 cm Mark II Kovacs core barrel. The bottom 5 cm of 3- 5 cores were pooled together for each site and the bottom skeletal later (1-2 cm) of 3-5 cores were scraped into 500 mL of filtered seawater. A separate core was taken for analysis of bulk nutrients on the bottom 5 cm. A full core was also taken to measure temperature and salinity for 0-5 cm sections for a full ice profile. These values will be used to calculate percent brine volume. **2018 Hudson Bay Amundsen Ice sampling protocol ** Ice samples were collected using a 9 cm Mark ΙΙ _Kovacs core barrel. Full or partial ice cores were taken to measure the temperature and salinity throughout the sea ice. Holes were drilled to the center of the core at 10 cm intervals beginning 5 cm from the ice-air interface. A Traceable Digital Thermometer was then inserted into the drilled hole and temperature was recorded. Salinity ice cores were cut with a saw into 10 cm sections, put into buckets, melted overnight, and salinity measurements were taken with a Thermo Scientific Orion 3-star salinometer from pure melt the following day. These profiles provide information on the state of the sea ice to assess whether the ice is growing or melting. An ice core for temperature and salinity was taken. At every ice station for a total of 15 stations throughout Hudson Bay. Partial ice cores were taken only in southern Hudson Bay where the ice was much thicker with ice floes >3m thick. in BaySys Physical Ice Sampling Data - 2017-2018