CIRCULATION IN THE FRESHWATER SWITCHYARD OF THE ARCTIC OCEAN: HELICOPTER CTD PROFILE DATA DATA ORGANIZATION The data structure is outlined below: Data are in uncompressed, space-delimited ASCII format. Each 2003-2004 file has eleven columns, and 2005-2009 files contain seven columns. Each file contains one record per depth interval, at various intervals (typically, ~0.04 m), from near surface to about 500 m. Data are contained in zip files. Each is named as follows: SwitchyardXXXX_CTD-O2s.zip or SwitchyarXXXX_CTDs.zip where XXXX is the year measurements were taken. Each zip file also includes a file ending in "ReadMe.txt" containing information about that year's measurements. Files include header rows identifying year, time, date, station, cast, and parameters. Each file is named to identify the year of measurement and the location of the station where the cast was made: 2003 file names: SYard2003_CTD-O2_StationX.txt, where X is the station number. 2004-2010 file names: SYardYYYY_CTDZ_SSSSSS.txt, where YYYY is year measurements were taken, Z is the cast number, and SSSS is the station name. DOCUMENTATION Please be sure to read the complete documentation in detail before working with the data.