event log version August 24, 1998 US JGOFS Antarctic Environments Southern Ocean Process Study (AESOPS) NBP-9604a Process cruise 1, Nathaniel B. Palmer Dates: from October 2, 1996 to November 24, 1996 Chief Scientist: Walker Smith Cruise track Some activities such as aerosol sampling, sampling from the ships seawater system, continues underway sampling (weather, solar radiation, Sea Beam) observations are not reported in the log. year = Year cruise took place event = A unique number assigned to each over the side sampling activity. This number is a composite of date and time UTC (GMT) in the form MMDDHHmm that indicates the starting time of the sampling activity. Generally, one event began as the preceding event ended. sta = Station. A unique number designating a general geographic location at which a suite of sampling activities may occur; occupied sequentially during the cruise. cast_type = a sampling activity code identifier, where: CTD = CTD rosette bottle cast TM = Trace Metal free rosette bottle cast TM_GoFlo = Trace metal free GoFlo bottle cast lat = starting latitude for each event (negative = south) in decimal degrees lon = starting longitude for each event (negative = west) in decimal degrees activity_and_comments = Identifies the sampling method, generally followed by a sampling sequence number for that method. CTD or Trace Metal (TM) casts were also designated by a 8 digit unique number consisting of: (3 digits for cruise, 3 digits for station, and 2 digits for sequence) seq = is a sequential (within each station) entry in the bridge log of all over the side activities for which gear was deployed. person = Name of the scientist(s) involved in the particular sampling event or responsible for the resulting data. nd = A code identifying "no data" used for missing data entries, incomplete entries, or bad data.