CTD Mean Data at ALOHA Station Format Document Mean data from station ALOHA CTD casts data are distributed in a format described here. The ensemble of 2-dbar CTD casts is averaged at each pressure interval and written to a file named hot***.mn, where *** is the cruise number. The mean CTD file consists of 7 columns. The first record includes the cruise number, station number, and the mean date of the casts (year, month, day), followed by two more integers with the cruise number to complete the 7 fields for this record Record 1: Column Format Item 1-3 i3 HOT Cruise number 4-5 i2 Station number 6-7 i2 Year (last two digits) 8-9 i2 Month 10-12 i3 Day 13-16 i4 Cruise number 17-20 i4 Cruise number Cruises after HOT-176 contain two zeros to complete 9 fields for this record, see below The remaining records contain CTD data. The order of variables in a record is as follows: pressure, temperature, salinity, oxygen, trans- mission, chloropigments (from the CTD fluorometer), and number of data used in the average. Missing values are flagged with -9.0. Cruises after HOT-176 also contain potential temperature and Potential density (sigma-theta) Data Record Format: Column Format Item 1-8 f8.1 Pressure (Decibars) 9-18 f10.4 Temperature (Degrees Celsius, International Temperature Scale of 1990) 19-28 f10.4 Salinity (1978 International Practical Salinity Scale) 29-36 f8.2 Oxygen (micromoles per kilogram) 37-43 f7.3 Transmission (% transmission) 44-51 f8.4 Chloropigments (microgram/liter) 52-57 i6 Number of CTD casts averaged at this pressure level Cruises after HOT-176 60-67 f8.4 Potential temperature (Degrees Celsius) 70-77 f8.4 Potential density (sigma-theta) Sample File: (First and last few records, cruises 1 to 176) 150 2 3 7 20 150 150 0.0 26.1109 35.3177 206.63 -9.000 0.0962 12 2.0 26.1537 35.3067 206.45 -9.000 0.0897 15 4.0 26.1556 35.3077 206.40 -9.000 0.0859 15 6.0 26.1561 35.3069 206.38 -9.000 0.0802 15 8.0 26.1565 35.3085 206.97 -9.000 0.0789 15 10.0 26.1562 35.3065 207.82 -9.000 0.0756 15 ... 4798.0 1.5156 34.6894 153.20 -9.000 0.0428 1 4800.0 1.5160 34.6894 153.20 -9.000 0.0426 1 4802.0 1.5161 34.6893 153.20 -9.000 0.0425 1 4804.0 1.5165 34.6895 153.20 -9.000 0.0424 1 4806.0 1.5167 34.6895 153.20 -9.000 0.0429 1 Sample File: (First and last few records, cruises after 176) 177 2 6 1 26 177 177 0 0 0.0 23.5361 35.2681 207.80 -9.000 -9.0000 12 23.5219 23.9869 2.0 23.5589 35.2608 208.20 -9.000 0.3540 14 23.5751 23.9657 4.0 23.5596 35.2641 208.10 -9.000 0.2511 14 23.5588 23.9730 .... 1018.0 3.9911 34.4782 41.73 -9.000 0.0263 14 3.9141 27.3800 1020.0 3.9837 34.4781 41.70 -9.000 0.0271 14 3.9066 27.3807 1022.0 3.9792 34.4785 41.70 -9.000 0.0274 14 3.9019 27.3815 1024.0 3.9804 34.4788 41.15 -9.000 0.0279 7 3.9029 27.3816 1026.0 4.0113 34.4858 -9.00 -9.000 0.0223 1 3.9334 27.3841