US JGOFS Antarctic Environments Southern Ocean Process Study (AESOPS)
Revelle Leg KIWI06, Oct. - Nov. 1997; APFZ Survey 1
John M. Morrison
14 December 1998
This "readme" file pertains to the CTD data taken during R/V Roger Revelle Cruise KIWI06, 20 October 24 November 1997.
Dr. Tim Cowles of the College of Oceanic and Atmospheric Sciences at
Oregon State University (cowles@oce.orst.edu) was the chief scientist during
this leg. This cruise was the first survey leg on the R/V Roger Revelle during
the U.S. JGOFS program in the Southern Ocean (AESOPS). The Revelle legs focused
on the Polar Front region and complemented several AESOPS cruises on board the
R/V Nathaniel Palmer which focused on the Ross Sea.
Several casts were also made with with a trace metal clean rosette equipped
with a SeaCat CTD which was lost on 13 Novenber 1997. These data were calibrated
separately as this system was not designed to produce hydrographic data of
"WOCE quality". These trace metal rosette data have been submitted to the
U.S. JGOFS data base as a separate files.
CTD Calibration:
A single calibration is applied to all of the stations for
salinity (conductivity) and dissolved oxygen, respectively (see below)
As can be seen in the SEA-BIRD Processing Information below, the CTD
package was outfitted with: dual temperature and salinity sensors,
Chelsea Fluorometer, Sea Tech Transmissometer, Biospherical QSP200L PAR
(both surface and underwater sensors, Sea-Tech LS6000 Backscatter sensor,
and Beckman Dissolved Oxygen. This file only refers to the calibration
of the primary CTD salinity and oxygen sensors. The remainder of the sensors
are to be calibrated by others and data from additional sensors will be
added to the files as they become available.
Problems:
a. station R0600201 was very spikey. The major spikes have been edited
out for the upper 600m. It is still reported here for
completeness.
b. station R0600204 had bad oxygen for pressures greater that 3952 db.
c. station R0600304 had a bad conductivity spike caused by the strong
temperature gradient between 130 and 180 meters. It was hand
edited out of the final data.
d. station R0600601 had bad oxygen values from 3954 to 4022m. They
have been hand edited out.
e. station R0601301 was noisy throughout. It is still reported here for
completeness. The data for pressure 0 - 186 db and 354 - 358 db
have been removed.
f. Oxygen sensor 130406 was bad:
No CTD O2 data for following stations:
/aesops/REVELLE/R06/CTD/R0600101.cnf
/aesops/REVELLE/R06/CTD/R0600104.cnf
/aesops/REVELLE/R06/CTD/R0600201.cnf
/aesops/REVELLE/R06/CTD/R0600301.cnf
/aesops/REVELLE/R06/CTD/R0600304.cnf
/aesops/REVELLE/R06/CTD/R0600401.cnf
/aesops/REVELLE/R06/CTD/R0600501.cnf
/aesops/REVELLE/R06/CTD/R0601401.cnf
---------------------------------------------------------------------------
SEA-BIRD Processing Information: Example 97120101.cnf
* Sea-Bird SBE 9 Raw Data File:
* FileName = G:\R0600101.DAT
* Software Version 4.227
* Temperature SN = 1712
* Conductivity SN = 1908
* Number of Bytes Per Scan = 33
* Number of Voltage Words = 5
* System UpLoad Time = Oct 23 1997 16:13:47
* NMEA Latitude = 57 0.07 S
* NMEA Longitude = 169 59.85 W
* NMEA UTC (Time) = 16:13:45
* Store Lat/Lon Data = Add to Header Only
* Command Line = seasave -cctd_24 -d300m -l
** Ship: R/V Roger Revelle
** Cruisenumber: KIWI06-RR
** Cruisename: JGOFS S.O. Survey 1
# nquan = 20
# nvalues = 499
# units = metric
# name 0 = t068: temperature, pri, IPTS-68 [deg C]
# name 1 = c0mS/cm: conductivity, primary [mS/cm]
# name 2 = pr: pressure [db]
# name 3 = t168: temperature, sec, IPTS-68 [deg C]
# name 4 = c1mS/cm: conductivity, secondary [mS/cm]
# name 5 = oxC: oxygen, current [æA]
# name 6 = oxT: oxygen, temperature [deg C]
# name 7 = flC: fluorometer, chelsea
# name 8 = xmiss: transmissometer
# name 9 = par: irradiance (PAR)
# name 10 = stLs6000: sea tech ls6000 [mg/l]
# name 11 = acc: acceleration [m/s^2]
# name 12 = sal00: salinity, PSS-78 [PSU], T0, C0
# name 13 = sal11: salinity, PSS-78 [PSU], T1, C1
# name 14 = depS: depth, salt water [m]
# name 15 = potemp068: potential temperature, pri, IPTS-68 [deg C]
# name 16 = sigma-é00: density, sigma-theta [kg/m^3], T0, C0
# name 17 = sigma-t00: density, sigma-t [kg/m^3], T0, C0
# name 18 = oxML/L: oxygen [ml/l]
# name 19 = flag: 0.000e+00
# span 0 = 4.1820, 4.3273
# span 1 = 31.907793, 32.188290
# span 2 = 1.000, 250.000
# span 3 = 4.1833, 4.3274
# span 4 = 31.908661, 32.183376
# span 5 = 0.34630, 0.49563
# span 6 = 3.37880, 6.42501
# span 7 = 1.693e-02, 3.753e-02
# span 8 = 85.48, 86.63
# span 9 = 3.380e-03, 1.803e-02
# span 10 = -0.07247, 13.31782
# span 11 = -311.72, 1976.56
# span 12 = 34.0420, 34.1355
# span 13 = 34.0394, 34.1229
# span 14 = 0.991, 247.554
# span 15 = 4.1819, 4.3131
# span 16 = 27.0014, 27.0721
# span 17 = 27.0002, 27.0703
# span 18 = 4.15882, 7.33953
# span 19 = 0.000e+00, 0.000e+00
# interval = decibars: 1
# start_time = Oct 23 1997 16:13:47
# bad_flag = -9.990e-29
# sensor 0 = Frequency 0 temperature, primary, 1712, 01-Sep-97/ODF
# sensor 1 = Frequency 1 conductivity, primary, 1908, 02-Mar-95, cpcor = -9.5700e-08
# sensor 2 = Frequency 2 pressure, 58952, 10-31-1994
# sensor 3 = Frequency 3 temperature, secondary, 2309, 01-Sep-97/ODF
# sensor 4 = Frequency 4 conductivity, secondary, 1472, 09-Sep-97s, cpcor = -9.5700e-08
# sensor 5 = Extrnl Volt 0 fluorometer, chelsea, 88190, 7-16-97
# sensor 6 = Extrnl Volt 1 transmissometer, T1004D, 7-8-97
# sensor 7 = Extrnl Volt 2 irradiance (PAR), 4508, 9-03-97
# sensor 8 = Extrnl Volt 3 sea tech ls6000, 347, 5-09-97
# sensor 9 = Extrnl Volt 5 altimeter
# sensor 10 = Extrnl Volt 6 oxygen, current, 130406, 10-Jan-96
# sensor 11 = Extrnl Volt 7 oxygen, temperature, 130406, 10-Jan-96
# sensor 12 = Extrnl Volt 9 surface irradiance (SPAR), degrees = 0.0
# datcnv_date = Oct 27 1997 12:27:31, 4.227
# datcnv_in = R0600101.DAT CTD_24.CON
# datcnv_skipover = 0
# alignctd_date = Oct 27 1997 13:27:33, 4.227
# alignctd_in = R0600101.CNV
# alignctd_cond_advSecs = 0.000, 0.000
# alignctd_temp_advSecs = 0.600, 0.000
# alignctd_oxygen_current_advSecs = 2.000, 0.000
# alignctd_oxygen_temp_advSecs = 2.000, 0.000
# alignctd_wetstar_advSecs = 0.000
# wildedit_date = Oct 27 1997 13:29:02, 4.227
# wildedit_in = R0600101.CNV
# wildedit_pass1_nstd = 2.0
# wildedit_pass2_nstd = 20.0
# wildedit_npoint = 10
# wildedit_vars = t068 c0mS/cm pr t168 c1mS/cm oxC oxT flC xmiss par stLs6000 acc
# wildedit_excl_bad_scans = yes
# celltm_date = Oct 27 1997 13:30:29, 4.227
# celltm_in = R0600101.CNV
# celltm_alpha = 0.0300, 0.0300
# celltm_tau = 7.0000, 7.0000
# celltm_temp_sensor_use_for_cond = primary, secondary
# filter_date = Oct 27 1997 13:31:57, 4.227
# filter_in = R0600101.CNV
# filter_low_pass_tc_A = 0.150
# filter_low_pass_tc_B = 2.000
# filter_low_pass_A_vars = pr
# filter_low_pass_B_vars =
# loopedit_date = Oct 27 1997 13:34:51, 4.227
# loopedit_in = R0600101.CNV
# loopedit_minVelocity = 0.100
# loopedit_excl_bad_scans = yes
# derive_date = Oct 27 1997 13:47:34, 4.227
# derive_in = R0600101.CNV CTD_24.CON
# derive_time_window_docdt = seconds: 2
# binavg_date = Oct 27 1997 13:50:08, 4.227
# binavg_in = 101.CNV
# binavg_bintype = Pressure Bins
# binavg_binsize = 1.00
# binavg_excl_bad_scans = yes
# binavg_downcast_only = no
# binavg_skipover = 0
# binavg_surface_bin = no, min = 0.000, max = 0.000, value = 0.000
# file_type = ascii
*END*
----------------------------------------------------
----------------------------------------------------
CTD SALINIITY CALIBRATION
----------------------------------------------------
Stations Calibrated:
/aesops/REVELLE/R06/CTD/R0600101.cnf
/aesops/REVELLE/R06/CTD/R0600104.cnf
/aesops/REVELLE/R06/CTD/R0600201.cnf
/aesops/REVELLE/R06/CTD/R0600301.cnf
/aesops/REVELLE/R06/CTD/R0600304.cnf
/aesops/REVELLE/R06/CTD/R0600401.cnf
/aesops/REVELLE/R06/CTD/R0600501.cnf
/aesops/REVELLE/R06/CTD/R0600601.cnf
/aesops/REVELLE/R06/CTD/R0600701.cnf
/aesops/REVELLE/R06/CTD/R0600801.cnf
/aesops/REVELLE/R06/CTD/R0600805.cnf
/aesops/REVELLE/R06/CTD/R0600901.cnf
/aesops/REVELLE/R06/CTD/R0601001.cnf
/aesops/REVELLE/R06/CTD/R0601201.cnf
/aesops/REVELLE/R06/CTD/R0601401.cnf
/aesops/REVELLE/R06/CTD/R0601601.cnf
/aesops/REVELLE/R06/CTD/R0601701.cnf
/aesops/REVELLE/R06/CTD/R0601801.cnf
/aesops/REVELLE/R06/CTD/R0601802.cnf
/aesops/REVELLE/R06/CTD/R0601803.cnf
/aesops/REVELLE/R06/CTD/R0601806.cnf
/aesops/REVELLE/R06/CTD/R0601901.cnf
/aesops/REVELLE/R06/CTD/R0602001.cnf
/aesops/REVELLE/R06/CTD/R0602101.cnf
/aesops/REVELLE/R06/CTD/R0602201.cnf
/aesops/REVELLE/R06/CTD/R0602301.cnf
/aesops/REVELLE/R06/CTD/R0602302.cnf
/aesops/REVELLE/R06/CTD/R0602303.cnf
/aesops/REVELLE/R06/CTD/R0602305.cnf
/aesops/REVELLE/R06/CTD/R0602306.cnf
---------------------------------------------
Conductivity Sensor 1908:
To correct the CTD conductivities the
following correction was used:
Cor Sal = Obs Sal - Sal Cor
Conductivity STDEV= 0.001 MEAN= -0.001
Salinity STDEV= 0.001 MEAN= -0.001
Therefore, a correction of .001 was applied to the shipboard
Conductivities and Salinities.
The reported Conductivities and Salinities are good to +/- .001.
---------------------------------------------
---------------------------------------------
CTD O2 Calibration:
----------------------------------------------
Oxygen sensor 130406 was bad (see above).
------------------------------------
Oxygen Sensor 130475:
Calibrated CTD O2 for the following stations:
/aesops/REVELLE/R06/CTD/R0600601.cnf
/aesops/REVELLE/R06/CTD/R0600701.cnf
/aesops/REVELLE/R06/CTD/R0600801.cnf
/aesops/REVELLE/R06/CTD/R0600805.cnf
/aesops/REVELLE/R06/CTD/R0600901.cnf
/aesops/REVELLE/R06/CTD/R0601201.cnf
/aesops/REVELLE/R06/CTD/R0601701.cnf
/aesops/REVELLE/R06/CTD/R0601802.cnf
/aesops/REVELLE/R06/CTD/R0601803.cnf
/aesops/REVELLE/R06/CTD/R0601806.cnf
/aesops/REVELLE/R06/CTD/R0601901.cnf
/aesops/REVELLE/R06/CTD/R0602001.cnf
/aesops/REVELLE/R06/CTD/R0602101.cnf
/aesops/REVELLE/R06/CTD/R0602201.cnf
/aesops/REVELLE/R06/CTD/R0602301.cnf
/aesops/REVELLE/R06/CTD/R0602302.cnf
/aesops/REVELLE/R06/CTD/R0602303.cnf
/aesops/REVELLE/R06/CTD/R0602305.cnf
/aesops/REVELLE/R06/CTD/R0602306.cnf
To correct CTD-O2 the following equation is used:
Corrected CTD-O2 = Uncorrected CTD-O2 - O2 Cor
There was a break in the calibration curve at approximately
150 m, so different calibrations are applied to the
upper 150 meters and from 150 m to the bottom:
Calibration: 0 to 150 m
O2 Cor = -0.00017189940 - 0.0042962837 * (CTD Observed Press)
+ 3.2715881e-05 * (CTD Observed Press)**2
Standard Deviation of Correction = 0.01
Calibration: 150 - Bottom
O2 Cor = -0.00012722764 - 0.00010914776 * (CTD Observed Press)
+ 3.7561052e-08 * (CTD Observed Press)**2
Standard Deviation of Correction = 0.01
Therefore, the CTD-O2 data are good to approximately +/- 0.01 ml/l.
--------------------------------------------------------------------
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
Phone: 919-515-7449
Fax: 919-515-7802
Email: John_Morrison@ncsu.edu