Dataset: CTD

Name: Processed hydrography data collected using the ship's CTD package during the Metzyme cruise (R/V Kilo Moana KM1128) in the tropical North Pacific in October 2011
Published: 2017-10-09
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.716469.1

Spatial Extent: N:17 E:-154.4 S:-15 W:-173.1

Temporal Extent: 2011-10-01 - 2011-10-25

Project:

Connecting Trace Elements and Metalloenzymes Across Marine Biogeochemical Gradients (GPc03) (MetZyme)

Program:

U.S. GEOTRACES (U.S. GEOTRACES)

Principal Investigator:

Mak A. Saito (Woods Hole Oceanographic Institution, WHOI)

Contact:

Alyson E. Santoro (University of California-Santa Barbara, UCSB)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2017-10-09

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Processed hydrography data collected using the ship's CTD package during the Metzyme cruise (R/V Kilo Moana KM1128) in the tropical North Pacific in October 2011

Abstract:

Processed hydrography data collected using the ship's CTD package during the Metzyme cruise (R/V Kilo Moana KM1128) in the tropical North Pacific in October 2011.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2017-10-09	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.716469.1	2019-08-01

Description

Processed hydrography data from Metzyme cruise (KM1128) collected using the ship's CTD packages.

These data were published in:
Santoro, A.E., Saito, M.A., Goepfert, T.J., Lamborg, C.H., Dupont, C.L., and G.R. DiTullio. 2017. Thaumarchaeal ecotype distributions across the equatorial Pacific Ocean and their potential roles in nitrification and sinking flux attenuation. Limnology & Oceanography. doi:10.1002/lno.10547

Methods & Sampling

Data were collected using the ship's CTD package (SBE911+). Note that the ship’s first& CTD, used at Station 1, was lost at station 2. A second CTD package was later obtained and used at stations 5-12. (Refer to the 'Problem Report' below for more information.)

Also note that a second CTD package (Trace Metal Rosette (TMR), SEACAT 19+) was also used for sampling at some stations. See the "TMR Hydrography dataset" (https://www.bco-dmo.org/dataset/716685) for these related data.

Data Processing Description

Note that all raw data are contained in the NODC R2R repository for cruise KM1128. This deposition includes only the processed data.

Data were processed using SeaBird Data Processing software, version 7.21f.

The processing routine for the first sensor package (file: km1128_001_bin.cnv) utilized the following processing parameters:
# datcnv_skipover = 0
# datcnv_ox_hysteresis_correction = yes
# datcnv_ox_tau_correction = yes
# filter_low_pass_tc_A = 0.150
# filter_low_pass_tc_B = 2.000
# filter_low_pass_A_vars = prDM upoly0 upoly1 xmiss
# filter_low_pass_B_vars =
# alignctd_adv = sbeox0Mm/Kg 2.000
# loopedit_minVelocity = 0.250
# loopedit_surfaceSoak: minDepth = 2.0, maxDepth = 20, useDeckPress = 0
# loopedit_excl_bad_scans = yes
# wildedit_pass1_nstd = 2.0
# wildedit_pass2_nstd = 20.0
# wildedit_pass2_mindelta = 0.000e+000
# wildedit_npoint = 100
# wildedit_vars = prDM depSM t090C c0mS/cm sbeox0Mm/Kg upoly0 upoly1 t190C c1mS/cm xmiss
# wildedit_excl_bad_scans = yes

The processing routine for the second sensor package (all other files) utilized the following processing parameters:
# datcnv_skipover = 0
# datcnv_ox_hysteresis_correction = yes
# datcnv_ox_tau_correction = yes
# filter_low_pass_tc_A = 0.150
# filter_low_pass_tc_B = 2.000
# filter_low_pass_A_vars = prDM flSP
# filter_low_pass_B_vars =
# alignctd_adv = sbeox0Mm/Kg 2.000
# loopedit_minVelocity = 0.250
# loopedit_surfaceSoak: minDepth = 2.0, maxDepth = 20, useDeckPress = 0
# loopedit_excl_bad_scans = yes
# wildedit_pass1_nstd = 2.0
# wildedit_pass2_nstd = 20.0
# wildedit_pass2_mindelta = 0.000e+000
# wildedit_npoint = 100
# wildedit_vars = prDM depSM t090C sbeox0Mm/Kg flSP c0mS/cm
# wildedit_excl_bad_scans = yes
# binavg_bintype = meters
# binavg_binsize = 1
# binavg_excl_bad_scans = yes
# binavg_skipover = 0
# binavg_surface_bin = no, min = 0.000, max = 0.000, value = 0.000

Problem Report:
The entire rosette, including the CTD sensor package, came free from the hydrowire at Station 2 and was never recovered. A reconstituted, but limited, sensor package was assembled by Station 5. Details given above refer either to the 'first package' (Station 1) or 'second package' (Stations 5-12). Gaps in the dataset were filled using CTD data from the sensor package on the trace metal clean rosette (TMR), deposited as a separate dataset in BCO-DMO.

No ship's CTD data were taken at Station 11.

Surface (0-10 m) oxygen data are suspect.

BCO-DMO Processing:
- modified parameter names to conform with BCO-DMO naming conventions (removed spaces, replaced "/" with underscores);
- replaced blanks (missing data) with "nd";
- converted longitude values from positive to negative to indicate West.

Data Files

File
CTD.csv (Comma Separated Values (.csv), 1.63 MB) MD5:9f456c55921aaa04e99c0f7b6cf2dc11 Primary data file for dataset ID 716469

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1031271

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KM1128	GPc03 MetZyme	2011-10-01	R/V Kilo Moana	Carl Lamborg (Chief Scientist) Mak A. Saito (Co-Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: Sea-Bird SBE911+

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
prDM	Pressure, Digiquartz	decibars (db)	press
Lat	Station latitude in decimal degrees (North = positive)	decimal degrees	lat
Long	Station longitude in decimal degrees (East = positive)	decimal degrees	lon
t090C	Temperature (ITS-90)	degrees Celsius ( C)	temp
t190C	Temperature 2 (secondary) (ITS-90)	degrees Celsius ( C)	temp
density00	Density	kilograms per cubic meter (Kg/m^3)	density
sigma_theta	Sigma-theta density	kilograms per cubic meter (Kg/m^3)	sigma_0
depSM	Sample depth	meters (m)	depth
sbeox0mM_kg	Oxygen, SBE 43	micromoles per kilogram (umol/Kg)	O2
C0mS_cm	Conductivity	milliSiemens per centimeter (mS/cm)	cond
c1mS_cm	Conductivity 2 (secondary)	milliSiemens per centimeter (mS/cm)	cond
sal00	Salinity, Practical	practical salinity units (PSU)	sal
cast	Cast number	unitless	cast
flSP	Chlorophyll fluorescence, Seapoint	unitless	fluor
upoly0	Upoly 0, Wetlabs ECOFLNTU (Chlorophyll fluorescence)	unitless	fluor
cruise	Cruise identifier	unitless	cruise_id
Station	Station identifier	unitless	sta
flag	Flag	unitless	flag
xmiss	Beam Transmission, Chelsea/Seatech (percent, %)	unitless (percent)	trans

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