Temperature, salinity, topsounder, and bottom sounding data from onboard sonar and XCTD casts from the Arctic Ocean from submarines in support of the Scientific Ice Expeditions from 01 January 1993 to 4 June 2001 (NODC Accession 0000568)

XCTD and sonar data were collected from submarines in the Arctic Ocean. Data were collected in support of the Scientific Ice Expeditions from 01 January 1993 to 4 June 2001. XCTD parameters include profiles of temperature, salinity, sound velocity, and density. Topsounder data include ice draft measurements made using a high frequency upward-looking, narrow-beam sonar. Bottom soundings were made using a high-frequency, narrow beam sonar.