In situ sea ice temperature and relative conductivity measurements from Microstructure and In situ Salinity and Temperature buoy in Elson Lagoon, October 2017-March 2018

• Main Authors: Alice Bradley, Rachel Obbard, Ignatius Rigor
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2020
• Subjects: EARTH SCIENCE > CRYOSPHERE > SEA ICE; EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS; EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE GROWTH/MELT; EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TEMPERATURE; EARTH SCIENCE > CRYOSPHERE > SEA ICE > SALINITY; Sea ice; Alaska
• Online Access: https://doi.org/10.18739/A26W9696T

Two Microstructure and In situ Salinity and Temperature (MIST) buoys were deployed in Elson Lagoon in October, 2017. They each consist of two vertical sets of 32 temperature sensors colocated with pairs of exposed wires, between which the electrical impedance of the ice/water in between can be measured (see Notz, 2005). These sensor pairs are located every 3 centimeters (cm) from slightly (~3 cm) above the water line to ~87 cm below. The buoys were each additionally equipped with air temperature, Global Positioning System (GPS), and x-y tilt sensors. Each sensor is sampled every hour, at which point data was both stored locally and sent back via Iridium short burst data link. The buoys were deployed in open water at the beginning of the ice growth season so that the sea ice grows down around the sensors. The electrical impedance of the water and ice, combined with the temperature, can be used to find solid fraction and bulk salinity of the ice as it grows and evolves over the winter season. These buoys were a new design, using a sensor system that had not been run unattended in the field for long periods of time before. Several channels on the sensors stopped reporting over the course of the season, so missing measurements in this dataset are filled in with "NaN". The only vertical profile that continued making measurements throughout a full ice growth season is the left side of buoy E. This was however an abbreviated season, with the buoy having been run over by an ice floe shortly after deployment and was chipped out of the ice and righted in early December (see Sampling, Study Extent section). Notz, D., Wettlaufer, J.S. and Worster, M.G., 2005. A non-destructive method for measuring the salinity and solid fraction of growing sea ice in situ. Journal of Glaciology, 51(172), pp.159-166.