John M. Morrison
26 August 1998
US JGOFS Antarctic Environments Southern Ocean Process Study (AESOPS)
NBP9604A: Ross Sea Process 1:
This "readme" file pertains to the CTD data taken
by the TRACE METAL ROSETTE during RV N. B. Palmer cruise NBP9604A
in October-November 1996. Dr. W. O. Smith of the University
of Tennessee was the chief scientist during this leg
(wosmith@utkux.utk.edu).
This cruise was the first process study leg
of the U.S. JGOFS program in the Southern Ocean (AESOPS).
TRACE METAL ROSETTE CTD Calibration:
On this cruise, one CTD configuration was used. The processing
and calibration information for this configuration is given
in file:
This is the setup, processing and calibation information for the
setup of the CTD on the TRACE METAL ROSETTE for cruise NBP9604A.
The casts made with the Trace Metal Clean Rosette on this leg are
reported here. These data were collected using a SeaBird SEACAT CTD and
therefore are not "WOCE" caliber data. The conductivity data have
been calibrated using the same techniques as used in calibration of
the Primary CTD system.
In addition, there was a PAR sensor mounted on this CTD. The PAR data
are listed here for completion and have been calibrated using the
factory calibration information (no in-situ calibration data were
collected).
---------------------------------------------------------------------------
SEA-BIRD Processing Information: Example 96410102.CNV
* Sea-Bird SBE 19 Data File:
* FileName = G:\96410102.HEX
* Software Version 4.218
* Temperature SN = 2216
* Conductivity SN = 2216
* System UpLoad Time = Oct 08 1996 05:56:55
** Ship: R/V Nathaniel B. Palmer
** Cruise: JGOFS Southern Ocean
# nquan = 12
# nvalues = 197
# units = metric
# name 0 = t068: temperature, IPTS-68 [deg C]
# name 1 = c0mS/cm: conductivity [mS/cm]
# name 2 = pr: pressure [db]
# name 3 = par: irradiance (PAR)
# name 4 = scan: scan number
# name 5 = timeS: time [s]
# name 6 = sal00: salinity, PSS-78 [PSU]
# name 7 = depS: depth, salt water [m]
# name 8 = sigma-t00: density, sigma-t [kg/m^3]
# name 9 = sigma-é00: density, sigma-theta [kg/m^3]
# name 10 = potemp068: potential temperature, IPTS-68 [deg C]
# name 11 = flag: 0.000e+00
# span 0 = -1.7186, 2.0796
# span 1 = 26.756504, 30.536112
# span 2 = 5.308, 201.041
# span 3 = 2.722e-03, 2.148e+00
# span 4 = 121, 911
# span 5 = 59.750, 454.900
# span 6 = 33.8568, 34.4955
# span 7 = 5.258, 199.033
# span 8 = 27.2401, 27.5612
# span 9 = 27.2402, 27.5621
# span 10 = -1.7188, 2.0688
# span 11 = 0.000e+00, 0.000e+00
# interval = decibars: 1
# start_time = Oct 08 1996 05:56:55
# bad_flag = -9.990e-29
# sensor 0 = Frequency 0 temperature, 2216, 06-Jun-96s
# sensor 1 = Frequency 1 conductivity, 2216, 06-Jun-96s, cpcor = -9.5700e-08
# sensor 2 = Extrnl Volt 0 irradiance (PAR), UWQ, May 21, 1996
# sensor 3 = Pressure Voltage, 178053, 06 June 1996
# datcnv_date = Oct 23 1996 23:03:41, 4.218
# datcnv_in = 96410102.HEX TM.CON
# datcnv_skipover = 0
# filter_date = Oct 23 1996 23:03:44, 4.218
# filter_in = 96410102.CNV
# filter_low_pass_tc_A = 0.500
# filter_low_pass_tc_B = 2.000
# filter_low_pass_A_vars = c0mS/cm
# filter_low_pass_B_vars = pr
# alignctd_date = Oct 23 1996 23:03:47, 4.218
# alignctd_in = 96410102.CNV
# alignctd_cond_advSecs = 0.000, 0.000
# alignctd_temp_advSecs = 0.500, 0.000
# alignctd_oxygen_current_advSecs = 0.000, 0.000
# alignctd_oxygen_temp_advSecs = 0.000, 0.000
# loopedit_date = Oct 23 1996 23:03:50, 4.218
# loopedit_in = 96410102.CNV
# loopedit_minVelocity = 0.250
# loopedit_excl_bad_scans = yes
# binavg_date = Oct 23 1996 23:03:53, 4.218
# binavg_in = 96410102.CNV
# binavg_bintype = Pressure Bins (No Interpolation)
# binavg_binsize = 1.00
# binavg_excl_bad_scans = yes
# binavg_downcast_only = no
# binavg_skipover = 0
# binavg_surface_bin = yes, min = 2.000, max = 0.500, value = 0.000
# derive_date = Oct 23 1996 23:03:55, 4.218
# derive_in = 96410102.CNV TM.CON
# file_type = ascii
*END*
----------------------------------------------------------------
Calibration:
Calibration for Conductivity and Salinity:
The CTD Conductivity sensor was calibrated by correlating the CTD
downcast conductivities with the conductivities of the water samples
taken with the TRACE METAL ROSETTE on the upcast. The mean and
standard deviations of these differences using all of the available
bottle data are given below.
/aesops/NBP9604A/FINAL_DATA/ANC/96410102.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410308.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410309.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410310.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410402.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410602.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96410802.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411003.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411005.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411103.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411203.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411303.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411503.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96411703.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96412003.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96412301.anc_tm
/aesops/NBP9604A/FINAL_DATA/ANC/96412404.anc_tm
MINIMUM PRESSURE USED = 0 db
Conductivity STDEV= 0.01 MEAN= -0.02
Salinity STDEV= 0.01 MEAN= -0.03
Therefore, a correction of .02 was applied to the CTD conductivities.
The reported Conductivities and Salinities are good to +/- .01.
----------------------------------------------------------------
The raw data files may be requested from:
DR.JOHN M. MORRISON
NORTH CAROLINA STATE UNIVERSITY
DEPARTMENT OF MARINE, EARTH AND ATMOSPHERIC SCIENCES
JORDAN HALL RM. 1125
BOX 8208
RALEIGH, NC 27695-8208
EMAIL: John_Morrison@NCSU.EDU
PHONE: 919-515-7449
FAX: 919-515-7802