Dataset: CTD - TRIAXUS - 24Hz Data
Deployment: RISE2005a

CTD - TRIAXUS - 24Hz Data

Principal Investigator:

Edward D. Zaron (Portland State University, PSU)

Co-Principal Investigator:

David A. Jay (Oregon Health and Science University, OGI/OHSU)

BCO-DMO Data Manager:

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

Project:

River Influences on Shelf Ecosystems (RISE)

Current State:

Final no updates expected

Version:

21 November 2011

Deployment Synonyms:

RISE-2

Coordinated Deployments:

W0505C

Version Date:

2011-11-21

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/454928/data

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Description

TRIAXUS towed Seabird CTD data from the RISE Project, NODC accession 49910.
Sea-bird SBE 9 pumped CTD attached to the Triaxus towed undulating platform.

The purpose of the data collection was to provide transects through the Columbia River plum
to understand the distribution of water mass properties and configuration of isopycnal surfaces.
The data were also used in an analysis of Thorpe overturning scales to quantify vertical mixing
along the 50m isobath near the mouth of the Columbia River.

Because of the amount of data, they are presented as the complete (24Hz) dataset and a decimated
to 1 second dataset. Both are large datasets. The 2005 24Hz data are broken into two parts to allow
retrieval without the system timing out.

Methods & Sampling

Dataset acquisition description

These CTD data were obtained during the NSF-sponsored RISE project during July 2004,
June 2005, and May-June 2006, on the continental shelf off Oregon and Washington, USA,
in the Northeast Pacific Ocean. The data were collected by a CTD mounted on the towed
Triaxus platform. The Triaxus was normally set to undulate between the ocean surface
and a depth of 40 to 60m. Transects obtained range from a few km to over 60km in length.

Deployment-specific acquisition description

Note: Part 2 of 2

Data Processing Description

Dataset Processing Description

Netcdf files converted from a .cnv-format file created by Sea-Bird Electronics "Seasave Win32 V 5.30a".
Each Netcdf file contains global attributes taken verbatim from the ASCII header of the .cnv file.

BCO-DMO Edits
- Original data contributed as NetCDF files
- ARM Tools NetCDF Windows routine cdf2ascii.exe used to convert the data to ASCII format
- ARM Tools NetCDF Windows routine ncdump.exe used to extract header information (parameters and sensors)
- CTD dataset name, date, time, lat, lon imported from the header information in the converted files
- A common set of CTD parameters were generated for all three years worth of data.

Deployment-specific processing description

<p>Simple script RISE2005_TCTD_2_BCODMO.awk generated to reformat</br>
the converted NetCDF files to BCO-DMO</p>

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0239089	NSF Division of Ocean Sciences

Instruments

CTD TRIAXUS

Supplied Description:

Instrument Type

Generic Name: CTD TRIAXUS

Generic Description:

Sea-bird SBE 9 pumped CTD attached to the Triaxus towed undulating platform. The Triaxus towed undulating vehicle, designed and manufactured by MacArtney, achieves high resolution 3-dimensional surveys of the upper 180m of the water column. The standard sensor package includes a Seabird CTD (with optional secondary C and T sensors), transmissometer, dissolved oxygen, chlorophyll fluorometer, and PAR sensor. In addition to this basic configuration, Triaxus can accommodate up to 9 additional sensor packages / sensors. See http://www.macartney.com/systems/remote-technology/triaxus.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Year	Year of data	YYYY	year
Dataset	Dataset/Transect Id	text	dataset_id
Date	Date (GMT)	YYYYMMDD	date
Time	Start Time (GMT)	HHMM	time
Lon	Start longitude	decimal degrees (West is negative)	lon
Lat	Start latitude	decimal degrees (South is negative)	lat
Nrecord	Record number	integer	number
c0	Conductivity	S/m	cond
latitude	Latitude	decimal degrees (South is negative)	lat
longitude	Longitude	decimal degrees (West is negative)	lon
pumps	Pump Status	integer	status
timeJ	Julian Days	decimal days	yrday
timeH	Time Elapsed hours	hours	hour_gmt
timeM	Time Elapsed minutes	minutes	minute_gmt
timeS	Time Elapsed seconds	seconds	seconds_gmt
scan	Scan count	integer	scan
prDM	pressure Digiquartz	decibars	press
t090	temperatue ITS-90	degrees celsius	temp
depSM	depth salt water	meters	depth
dz_dt	Descent Rate	meters/second	descent_rate
acc	Acceleration	meters/second^2	no_bcodmo_term
flSCC	Fluorescence Turner Cor Chl	ug/L	fluor
obsscufa	OBS Turner SCUFA	NTU	turbidity
n2sat	Nitrogen Saturation	mg/l	no_bcodmo_term
sbeox	Oxygen	SBE 43	O2
wetstar	Fluorescence Wetlab Wetstar	mg/m^3	fluor
modError	Modulo Error Count	(na)	no_bcodmo_term
flag	Flag (0.000e+00)	0.00E+000	flag

Database

Contribute Data

Dataset: CTD - TRIAXUS - 24Hz Data
Deployment: RISE2005a

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Database

Contribute Data

Dataset: CTD - TRIAXUS - 24Hz DataDeployment: RISE2005a

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Dataset: CTD - TRIAXUS - 24Hz Data
Deployment: RISE2005a