Dataset: Carbon Flux Explorer CCE_LTER P1706 - SOLO CTD Profiles

Name: CTD profile data from Carbon Flux Explorers deployed 100-500m in the California Current Regime, during the CCE-LTER process study (P1706) between June 2 and July 1, 2017
Published: 2020-09-28
Keywords: Twilight Zone, California Current Ecosystem, upwelling, Carbon FLux Explorer, CTD profiles, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.825602.1

Spatial Extent: N:35.07157 E:-121.14085 S:34.07337 W:-123.12924

Temporal Extent: 2017-06-02 - 2017-07-01

Project:

California Current Ecosystem Long Term Ecological Research site (CCE LTER)

Carbon Flux Explorer Development (C-SNOW Development)

Carbon Sedimentation In the Ocean Watercolumn (C-SNOW): Calibration (C-SNOW)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Long Term Ecological Research network (LTER)

Principal Investigator:

James K.B. Bishop (University of California-Berkeley, UC Berkeley)

Contact:

James K.B. Bishop (University of California-Berkeley, UC Berkeley)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-09-28

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD profile data from Carbon Flux Explorers deployed 100-500m in the California Current Regime, during the CCE-LTER process study (P1706) between June 2 and July 1, 2017

Abstract:

CTD profile data from Carbon Flux Explorers deployed 100-500m in the California Current Regime, during the CCE-LTER process study (P1706) between June 2 and July 1, 2017

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2020-09-28	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.825602.1	2020-09-30

Description

CTD profile data from Carbon Flux Explorers deployed 100-500m in the California Current Regime, during the CCE-LTER process study (P1706) between June 2 and July 1, 2017.

The location parameters and data are related to the publication: Bourne et al., 2020

Methods & Sampling

Data are derived from the Seabird 41 CTD integrated with Sounding Oceanographic Lagrangian Observer (SOLO) float of the Carbon Flux Explorer (CFE). Profiles are recorded as the CFE transits from depth to the surface following completion of each dive.

Data Processing Description

The data are as transmitted. The CTD averages the profile data in 5 decibar intervals and they are transmitted via Iridium satellite telemetry when the CFE surfaces. The profile from the last dive from a deployment is not transmitted and therefore is not usually available.

Data Files

File
cfe_ctdprofiles_concat.csv (Comma Separated Values (.csv), 691.61 KB) MD5:e74cf574aec380b9c1a558a9ae25b518 Primary data file for dataset ID 825602

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1538686

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
RR1710	LTER CCE-P1706 CCE-P1706 CCE LTER P1706 P1706	2017-06-01	R/V Roger Revelle	Mark D. Ohman (Chief Scientist)	data info

Instruments

Carbon Flux Explorer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Carbon Flux Explorer

Acronym: CFE

Generic Description:

The Carbon Flux Explorer (CFE) is designed to perform sustained high-frequency observations of POC and PIC sedimentation within the upper kilometer (or twilight zone) of the ocean for seasons to years and to operate in an observational context not dependent on ships. The CFE melds the concept of current-following, sample-collecting neutrally buoyant sediment traps with photographic imaging of the particles as they are deposited in a sediment trap.

The CFE and the operation of its particle flux sensing Optical Sedimentation Recorder (OSR) have been discussed in detail in Bishop et al. (2016). CFE has a design mission capability of 8 months of hourly operations (16 months @ 2 hours) and has been demonstrated by deployments of 40 days; CFE design depth is 1500m and it has been proven to 1000 m. The system has demonstrated operations in high sea states.

Diagram: https://datadocs.bco-dmo.org/docs/302/C-SNOW/data_docs/CFE_CFE-Cal.png

Bishop, J. K. B., Fong, M. B., and Wood, T. J.: Robotic observations of high wintertime carbon export in California coastal waters, Biogeosciences, 13, 3109–3129, https://doi.org/10.5194/bg-13-3109-2016, 2016.

Bourne, H. L., Bishop, J. K. B., Wood, T. J., Loew, T. J., and Liu, Y.: Carbon Flux Explorer optical assessment of C, N and P fluxes, Biogeosciences, 16, 1249–1264, https://doi.org/10.5194/bg-16-1249-2019, 2019

CTD Sea-Bird 41

Supplied Name: Seabird 41 CTD

Supplied Description:

Data are derived from the Seabird 41 CTD integrated with Sounding Oceanographic Lagrangian Observer (SOLO) float of the Carbon Flux Explorer (CFE).

Instrument Type

Generic Name: CTD Sea-Bird 41

Acronym: CTD SBE 41

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Sea-Bird SBE 41 CTD module was originally developed in 1997 for integration with sub-surface oceanographic floats. It uses MicroCAT Temperature, Conductivity, and Pressure sensors.

Sounding Oceanographic Lagrangian Observer

Supplied Name: SOLO

Supplied Description:

Data are derived from the Seabird 41 CTD integrated with Sounding Oceanographic Lagrangian Observer (SOLO) float of the Carbon Flux Explorer (CFE).

Instrument Type

Generic Name: Sounding Oceanographic Lagrangian Observer

Acronym: SOLO

Generic Description:

A standard ARGO style float, called the Sounding Oceanographic Lagrangian Explorer (SOLO and SOLO-II).

SOLO floats are drifting instruments and have the ability to change their own buoyancy. After deployment it moves with the ocean currents and can, therefore, travel long distances on their own without the need of a ship or a person to handle them. They are programmed to come to the ocean surface at regular intervals to transmit their data and position to orbiting satellites. The float then sinks again, continuing the process.

To control the buoyancy of the float, a small amount of oil is contained within the float. When the float is submerged, all of the oil is kept entirely within the hull. When it is time to rise to the surface, the oil is pumped into an external rubber bladder that expands. Since the weight of the float does not change but its volume increases when the bladder expands, the float becomes more buoyant and floats to the surface. Similarly, when the float is on the surface and it is time to submerge, the oil is withdrawn from the bladder into the hull of the float and the buoyancy decreases.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
year	Year of data acquisition	unitless	year
study	CCE-LTER process study designator (P1706)	unitless	cruise_id
cfeid	Carbon Flux Explorer Identity (CFE00X) where X is serial number (1 through 4)	unitless	inst_model
cfeno	Carbon Flux Explorer (CFE) serial number (1 through 4)	unitless	inst_model
cycle	CCE cycle number = our location number (range 1 to 4)	unitless	sample_descrip
location	location id as described in Bourne et al., 2020	unitless	sample_descrip
float	float number (NNNN)	unitless	inst_model
seq	profile index (1 nearest to surface - n deepest)	unitless	sample_descrip
dive	CFE dive number	unitless	sample_descrip
press	SOLO CTD pressure, accurate to ± 2 dbar	dbar	press
temp	SOLO CTD insitu temperature, accurate to ± 0.002 °C	degrees Celcius	temperature
sal	SOLO CTD salinity, accurate to ± 0.0035 psu	PSU	sal
ddays	decimal days since Jan 1 2017 at 0000 UTC, ddays = 0.5 on Jan 1 2017 at 1200UTC, ADCP data use same time	unitless	days
long	Decimal Longitude (negative for west)	decimal degrees	lon
lat	Decimal Latitude (negative for south)	decimal degrees	lat

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Database

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Dataset: Carbon Flux Explorer CCE_LTER P1706 - SOLO CTD Profiles