Dataset: CTD - Pump Seacat CTD - Up Casts
Deployment: OC449-02

CTD - Pump Seacat CTD - Up Casts

Principal Investigator:

Phoebe J. Lam (Woods Hole Oceanographic Institution, WHOI)

Contact:

Phoebe J. Lam (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Sources of Iron to the EasterN tropical Atlantic (SIRENA)

Current State:

Preliminary and in progress

Version:

09 May 2011

Deployment Synonyms:

32OC20080806, SIRENA

Version Date:

2011-05-09

Data URL:

https://www.bco-dmo.org/dataset-deployment/454570/data

Expand/Collapse All

Description

CTD *Up cast* data from Lam SBE19plus (Seacat) attached to end of the MacLane pump line
Note: These data not collected on R/V Islandia ISL0109 cruise

PI's Note (09 May 2011):
In comparing my pump seacat CTD to the ship's CTD, I've discovered that the ship's CTD's fluorescence and beam attenuation are no good, at least for OC449-3. The ship's fluorometer was clearly just not working. The ship's transmissometer misbehaved in a more subtle manner--oceanographically consistent, but of a different pattern than my pump seacat data. I concluded that my pump seacat CTD's transmissometer is the "correct" one by comparing to discrete particulate carbon measurements on particles collected on my pumps. Both particulate carbon concentrations and beam attenuation from my pump seacat CTD show a minimum at 500m at OC449-3 station 3, whereas the ship's CTD shows an anomalous minimum in subsurface beam attenuation at station 2, which is not seem in the particulate carbon concentrations.

Methods & Sampling

Dataset acquisition description

The CTD was allowed to debubble briefly just below the surface before paying out wire, but this was often insufficient to get out all bubbles, so upper ~15m of the downcasts are generally not good.

The transmissometer windows were wiped clean with distilled water before and after each cast, and kept capped in between deployments. The voltage of the transmissometer in air (Vair) and in the dark (Vdark) were read after each deployment to monitor drift, though beam attenuation reported here do not yet take shipboard baseline measurements into account, and use the calibrations of the transmissometer from the beginning of OC449-2 cruise.

See: "VIII. Protocols for Optics: Transmissometer and Scattering Sensors" in the Sampling and Sample-handling Protocols for GEOTRACES Cruises, Edited by the 2010 GEOTRACES Standards and Intercalibration Committee.

Deployment-specific acquisition description

* Sea-Bird SBE19plus Data File:
* FileName = C:dataSIRENAseacat awhexfiles20080809_stn3_d1.hex
* Software Version 1.59
* Temperature SN = 5236
* Conductivity SN = 5236
* System UpLoad Time = Aug 10 2008 14:20:50
** KN192-05 SeacatSIRENA OC449-2 Seacat
** Nov-Dec 2007 GMTAugust 2008
** TMCR or McLane DeploymentMcLane Deployments
** Lat Long16N28.712, 52W21.563
** Station 3, McLane Deploy 1 to 740m
* ds
* SeacatPlus V 1.6b SERIAL NO. 5236    10 Aug 2008 18:17:09
* vbatt = 11.1, vlith = 8.8, ioper = 61.6 ma, ipump = 40.3 ma,
* iext01 = 42.8 ma
* iext23 = 50.6 ma
*
* status = not logging
* number of scans to average = 1
* samples = 79872, free = 361633, casts = 1
* mode = profile, minimum cond freq = 3046, pump delay = 60 sec
* autorun = no, ignore magnetic switch = no
* battery type = alkaline, battery cutoff = 7.3 volts
* pressure sensor = strain gauge, range = 10000.0
* SBE 38 = no, Gas Tension Device = no
* Ext Volt 0 = yes, Ext Volt 1 = yes, Ext Volt 2 = yes, Ext Volt 3 = yes
* echo commands = yes
* output format = raw HEX
* append UCSD sigma-t, V
* S>
*
* SeacatPlus V 1.6b SERIAL NO. 5236    10 Aug 2008 18:17:23
* temperature: 10-oct-07
*     TA0 = 1.233097e-03
*     TA1 = 2.599901e-04
*     TA2 = -6.217010e-08
*     TA3 = 1.424099e-07
*     TOFFSET = 0.000000e+00
* conductivity: 10-oct-07
*     G = -1.011156e+00
*     H = 1.570412e-01
*     I = -5.888161e-04
*     J = 6.994908e-05
*     CF0 = 2.546154e+03
*     CPCOR = -9.570000e-08
*     CTCOR = 3.250000e-06
*     CSLOPE = 1.000000e+00
* pressure S/N = 227881, range = 10000 psia: 04-oct-07
*     PA0 = 1.049048e+01
*     PA1 = 1.113019e-01
*     PA2 = -1.291358e-09
*     PTCA0 = 5.244870e+05
*     PTCA1 = 4.940270e+00
*     PTCA2 = 4.455964e-03
*     PTCB0 = 2.759300e+01
*     PTCB1 = 3.766667e-03
*     PTCB2 = 0.000000e+00
*     PTEMPA0 = 5.933266e+01
*     PTEMPA1 = -5.963576e+01
*     PTEMPA2 = 1.426064e+01
*     POFFSET = 0.000000e+00
* volt 0: offset = -4.723474e-02, slope = 1.247667e+00
* volt 1: offset = -4.757158e-02, slope = 1.247768e+00
* volt 2: offset = -4.668316e-02, slope = 1.246813e+00
* volt 3: offset = -4.697684e-02, slope = 1.247485e+00
*     EXTFREQSF = 1.000012e+00
* dh
* cast   1 09 Aug 2008 16:14:04 samples 1 to 79872, avg = 1, stop = mag switch
* S>
# nquan = 15
# nvalues = 760
# units = specified
# name 0 = tv290C: Temperature [ITS-90, deg C]
# name 1 = c0S/m: Conductivity [S/m]
# name 2 = prdM: Pressure, Strain Gauge [db]
# name 3 = sbeox0Mm/Kg: Oxygen, SBE 43 [umol/Kg]
# name 4 = bat: Beam Attenuation, Chelsea/Seatech/Wetlab CStar [1/m]
# name 5 = flECO-AFL: Fluorescence, Wetlab ECO-AFL/FL [mg/m^3]
# name 6 = upoly0: Upoly 0, Turbidity Meter
# name 7 = v1: Voltage 1
# name 8 = sbeox0V: Oxygen Voltage, SBE 43
# name 9 = sal00: Salinity [PSU]
# name 10 = sigma-é00: Density [sigma-theta, Kg/m^3]
# name 11 = depSM: Depth [salt water, m], lat = 12
# name 12 = potemp090C: Potential Temperature [ITS-90, deg C]
# name 13 = oxsatML/L: Oxygen Saturation [ml/l]
# name 14 = flag: flag
# span 0 =     6.3620,    29.2534
# span 1 =   1.230963,   5.842750
# span 2 =      1.006,    765.785
# span 3 =    106.811,    215.696
# span 4 =    -0.0179,     4.9453
# span 5 =    -0.1484,    15.6959
# span 6 = 0.0114213, 4.6879689
# span 7 =     1.9703,     4.8128
# span 8 =     1.3021,     2.6530
# span 9 =     7.4903,    37.2916
# span 10 =     1.4659,    27.3130
# span 11 =      1.000,    760.000
# span 12 =     6.2928,    29.2531
# span 13 =    4.44782,    6.87465
# span 14 = 0.0000e+00, 0.0000e+00
# interval = meters: 1
# start_time = Aug 09 2008 16:14:04
# bad_flag = -9.990e-29
# sensor 0 = Frequency 0 temperature, 5236, 10-OCT-07
# sensor 1 = Frequency 1 conductivity, 5236, 10-OCT-07, cpcor = -9.5700e-08
# sensor 2 = Pressure Number
# sensor 3 = Extrnl Volt 0 Oxygen, SBE, primary, 1336, 02-Oct-07
# sensor 4 = Extrnl Volt 1 transmissometer, primary, CST-1070DR, 9-Aug-08
# sensor 5 = Extrnl Volt 2 WET Labs, ECO_AFL
# sensor 6 = Extrnl Volt 3 userpoly 0, FLNTURTD-870, 9-OCT-2007
# datcnv_date = Sep 01 2008 16:47:14, 7.14e
# datcnv_in = c:dataSIRENAseacat awhexfiles20080809_stn3_d1.hex C:dataSIRENAseacatprocessed20080901OC449-2SIRENA.con
# datcnv_skipover = 500
# alignctd_date = Sep 01 2008 16:47:21, 7.14e
# alignctd_in = c:dataSIRENAseacatprocessed20080809_stn3_d1.cnv
# alignctd_adv = tv290C 0.500, c0S/m -0.100, sbeox0Mm/Kg 4.000
# celltm_date = Sep 01 2008 16:47:22, 7.14e
# celltm_in = c:dataSIRENAseacatprocessed20080809_stn3_d1.cnv
# celltm_alpha = 0.0400, 0.0000
# celltm_tau = 8.0000, 0.0000
# celltm_temp_sensor_use_for_cond = primary,
# Derive_date = Sep 01 2008 16:47:23, 7.14e
# Derive_in = c:dataSIRENAseacatprocessed20080809_stn3_d1.cnv C:dataSIRENAseacatprocessed20080901OC449-2SIRENA.con
# binavg_date = Sep 01 2008 16:47:34, 7.14e
# binavg_in = c:dataSIRENAseacatprocessed20080809_stn3_d1.cnv
# binavg_bintype = meters
# binavg_binsize = 1
# binavg_excl_bad_scans = no
# binavg_skipover = 0
# binavg_surface_bin = yes, min = 0.000, max = 0.000, value = 0.000
# split_date = Sep 01 2008 16:47:49, 7.14e
# split_in = c:dataSIRENAseacatprocessed20080809_stn3_d1bin1m.cnv
# split_excl_bad_scans = yes
# file_type = ascii
*END*

Data Processing Description

Dataset Processing Description

SBE43 oxygen sensor was calibrated to 32 Winkler titrations conducted on first leg (OC449-2) by Taka Ito at stations 9,13,17,22.

BCO-DMO Processing Notes:
- Awk written to reformat original .cnv files contributed by Phoebe Lam
- AWK: SIRENA_CTD_Pump_2_BCODMO.awk

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0726367	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird SEACAT 19

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird SEACAT 19

Acronym: CTD SBE 19

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0042/

Generic Description:

The Sea-Bird SBE 19 SEACAT Recorder measures conductivity, temperature, and pressure (depth). The SEACAT is self-powered and self-contained and can be deployed in profiling or moored mode. The SBE 19 SEACAT was replaced in 2001 by the 19plus. more information from Sea-Bird Electronics

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	SIRENA Cruise Id	text	cruise_id
station	Station Number	integer	station
cast	Cast Number	integer	cast
CTD_DataSet_Id	CTD Dataset Id	text	dataset_id
date	Station date	YYYYMMDD	date
time	Station time	HHMMSS	time
lat	Station latitude (South is negative)	decimal degrees	lat
lon	Station longitude (West is negative)	decimal degrees	lon
sampled_for	Sampling	text	sample_descrip
depth_station	Station Depth	meters	depth
Temperature	tv290C: Temperature ITS-90	degrees celsius	temp
Conductivity	c0S/m: Conductivity	S/m	cond
Pressure	prdM: Pressure Strain Gauge	decibars	press
Oxygen	sbeox0Mm/Kg: Oxygen; SBE 43	umol/Kg	O2
Bat	bat: Beam Attenuation Chelsea/Seatech/Wetlab CStar	1/m	beam_cp
Fluor	FlECO-AFL: Fluorescence Wetlab ECO-AFL/FL	mg/m^3	fluor
Upoly0	upoly0: Upoly 0 Turbidity Meter	NTU(??)	turbidity
V1	v1: Voltage 1	volts	no_bcodmo_term
OxygenV	sbeox0V: Oxygen Voltage SBE 43	volts	O2_v
Salinity	sal00: Salinity	PSU	sal
Density	sigma-é00: Density sigma-theta	Kg/m^3	density
Depth	depSM: Depth salt water lat=12	meters	depth
PoTemp	potemp090C: Potential Temperature ITS-90	degrees celsius	potemp
Oxygen_Sat	oxsatML/L: Oxygen Saturation	ml/l	O2sat
flag	flag	nd	flag

Database

Contribute Data

Dataset: CTD - Pump Seacat CTD - Up Casts
Deployment: OC449-02

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD - Pump Seacat CTD - Up CastsDeployment: OC449-02

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: CTD - Pump Seacat CTD - Up Casts
Deployment: OC449-02