Dataset: CTD profiles near the ALOHA observatory and South Pacific Gyre

Name: CTD profiles collected during multiple cruises on the R/V Kilo Moana around the ALOHA observatory and South Pacific Gyre from 2014-2015
Published: 2017-02-17
Keywords: oceans

Cite This Dataset

Spatial Extent: N:22.9535 E:-154.4007 S:4.8807 W:-158.1727

Temporal Extent: 2014-02-21 - 2015-09-06

Project:

Collaborative Research: Isotopic insights to mercury in marine food webs and how it varies with ocean biogeochemistry (Hg_Biogeochemistry)

Evaluating the relative importance of suspended and sinking particles to the meso and bathypelagic food web in the central North Pacific (SuspendSinkPart)

Principal Investigator:

Brian N. Popp (University of Hawaiʻi at Mānoa, SOEST)

Co-Principal Investigator:

Hilary G. Close (University of Hawaiʻi at Mānoa, SOEST)

Jeffrey C. Drazen (University of Hawaiʻi at Mānoa, SOEST)

Cecelia Hannides (University of Hawaiʻi at Mānoa, SOEST)

Kanesa Seraphin (University of Hawaiʻi at Mānoa, SOEST)

Contact:

Brian N. Popp (University of Hawaiʻi at Mānoa, SOEST)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2017-02-17

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD profiles collected during multiple cruises on the R/V Kilo Moana around the ALOHA observatory and South Pacific Gyre from 2014-2015

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Description

This dataset contains CTD profile data collected during R/V Kilo Moana cruises around the ALOHA observatory (KM1407, KM1418, and KM1604) and a cruise to the South Pacific Gyre (KM1515). Data collected include pressure, depth, temperature, conductivity, salinity, dissolved oxygen, fluorescence, PAR, and turbidity.

For more information about the ALOHA observatory see: http://aco-ssds.soest.hawaii.edu/

Methods & Sampling

CTD data collected as per ship protocols.

Data Processing Description

Data Processed with the following steps using Seasave software version 7.22.5:

1. Data Conversion... (SBE): Matched CON or XMLCON files accordingly. Up and downcast
2. Window Filter... (SBE): Smoothed profiles & reduce spikes (median filter: 9 for all except cosine 500 for ISUS).
3. Filter... (SBE): Filtered B = 0.15 on Pressure only.
4. Align CTD... (SBE): Oxygen sensors only (4 seconds).
5. Cell Thermal Mass... (SBE): Default settings.
6. Loop Edit (SBE): Default settings
7. Bin Average (SBE): 1 m

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values replaced with no data value 'nd' for 'no data'
* added ISO Date format generated from Date and Time values
* values -9.99e-29 changed to 'nd'
* lat/lon rounded to four decimal places
* script used to convert Excel files for each cast to csv files

Data Files

File
hg_biochem_ctd.csv (Comma Separated Values (.csv), 48.14 MB) MD5:166b75090410fdc232952a3b1ff54a91 Primary data file for dataset ID 651963

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1433846
NSF Division of Ocean Sciences	OCE-1333734

Deployments

Deployment	Start Date	Platform	Investigator
KM1407	2014-02-19	R/V Kilo Moana	Jeffrey C. Drazen (Chief Scientist)	data info
KM1418	2014-08-29	R/V Kilo Moana	Jeffrey C. Drazen (Chief Scientist)	data info
KM1506	2015-05-03	R/V Kilo Moana	Hilary G. Close (Chief Scientist)	data info
KM1515	2015-08-15	R/V Kilo Moana	Brian N. Popp (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name:

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

Turner Designs Fluorometer 10-AU

Supplied Name: Turner 10-AU

Supplied Description:

Instrument Type

Generic Name: Turner Designs Fluorometer 10-AU

Acronym: Turner Fluorometer 10-AU

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0393/

Generic Description:

The Turner Designs 10-AU Field Fluorometer is used to measure Chlorophyll fluorescence. The 10AU Fluorometer can be set up for continuous-flow monitoring or discrete sample analyses. A variety of compounds can be measured using application-specific optical filters available from the manufacturer. (read more from Turner Designs, turnerdesigns.com, Sunnyvale, CA, USA)

WET Labs (Sea-Bird WETLabs) WETStar fluorometer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: WET Labs (Sea-Bird WETLabs) WETStar fluorometer

Acronym: WETStar

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0075/

Generic Description:

Submersible fluorometer designed for through-flow or pumped CTD applications manufactured by WetLabs and which can be configured for various types of fluorescence. The probe has a temperature range of 0-30 degrees C and a depth rating of 600 meters.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise identifier	unitless	cruise_id
station	Station identifier	unitless	station
cast	Cast identifier	unitless	cast
lat	Latitude	decimal degrees	lat
lon	Longitude; west is negative	decimal degrees	lon
ISO_DateTime_UTC	Date and Time (UTC) in format YYYY-mm-ddTHH:MM:SS[.xx]Z	unitless	ISO_DateTime_UTC
press	Pressure. Originally named prDM.	decibars	press
depth	Depth of sample. Originally named depSM.	meters	depth
temp	Primary temperature (ITS-90). Originally named t090C.	degrees Celcius	temp
cond	Primary conductivity. Originally named c0S/m.	Siemens per meter	cond
sal	Salinity. Originally named sal00.	practical salinity unit (PSU)	sal
O2_umol_kg	Dissolved oxygen. Originally named sbeox0Mm/Kg.	micromoles per kilogram	O2_umol_kg
O2_umol_kg2	Dissolved oxygen (SBE 43). Originally named sbeox1Mm/Kg.	micromoles per kilogram	O2
fluor	Fluorescence. Originally named flECO-AFL.	miligrams per meter cubed	fluor
fluor_chl	Fluorescence. Originally named flSP.	micrograms of chlorophyll per liter	fluor
turbidity	Turbidity. Originally named turbWETntu0.	Nephelometric Turbidity Unit (NTU)	turbidity
par	Photosynthetically Active Radiation. Originally named par.	microEinsteins per meter squared per second	PAR
sigma_e00	Primary sigma theta. Originally named sigma-e00.	kilograms per meters cubed	sigma_theta
trans	Beam Transmission. Originally named CStarTr0.	percent	trans
beam_c	Beam Attenuation. Originally named CStarAt0.	per meter	beam_c

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Database

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Dataset: CTD profiles near the ALOHA observatory and South Pacific Gyre