SIMB2 2015I was deployed in the Central Arctic on 20 September 2015 in multiyear ice (USCG HEALY).

From the archive's thermistor depth labels.

Second-generation seasonal ice mass balance buoy (SIMB2) from the CRREL/Dartmouth program.

SIMB2 2015I

Cold Regions Research and Engineering Laboratory

Time of the record in Unix format (seconds since 1970-01-01 UTC).

Derived, not measured directly: the distance between the snow/ice interface, from the acoustic snow sounder (MaxBotix) above the ice, and the ice/ocean interface, from the sonar altimeter (Benthos PSA-916) below it, using the fixed distance between the two sounders. Processed by the CRREL/Dartmouth program.

Derived from the acoustic snow sounder (MaxBotix) mounted above the surface: snow surface minus the snow/ice interface. Processed by the CRREL/Dartmouth program.

Air temperature (Campbell Scientific CS107 probe) in a radiation shield above the ice.

Snow/ice interface from the acoustic snow sounder (MaxBotix); moves down with surface melt. Height relative to the ice surface at installation (0 m, up positive).

Ice/ocean interface from the sonar altimeter (Benthos PSA-916); moves with bottom growth and melt. Height relative to the ice surface at installation (0 m, up positive).

Thermistor 1 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 2 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 3 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 4 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 5 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 6 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 7 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 8 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 9 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 10 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 11 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 12 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 13 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 14 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 15 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 16 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 17 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 18 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 19 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 20 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 21 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 22 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 23 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 24 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 25 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 26 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 27 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 28 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 29 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 30 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.

Thermistor 31 of 31 on the Beaded Stream TAC thermistor string, counted down from the top (10 cm spacing). Its height relative to the ice surface depends on the installation: see this deployment's thermistor depths.