Dataset: ISIIS Environmental Data
Deployment: MGL2207

View Data: For data, See Dataset Metadata Page: https://osprey.bco-dmo.org/dataset/942686

Principal Investigator:

Robert K. Cowen (Oregon State University, OSU)

Co-Principal Investigator:

Su Sponaugle (Oregon State University, OSU)

Kelly Rakow Sutherland (University of Oregon)

Scientist:

Marco Corrales Ugalde (Princeton University)

Student:

Elena Conser (Oregon State University, OSU)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Plankton size spectra and trophic links in a dynamic ocean (Plankton Size Spectra)

Version:

Deployment Synonyms:

Summer 2022 SPECTRA cruise, "plankton size spectra"

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Description

This dataset will be updated to include additional data from deployments from the winter of 2022 and winter of 2023.

Methods & Sampling

Dataset acquisition description

Location description: Six cross-shelf transects in the northern California Current, ranging from near the Oregon-California border (42.5°N) to southern Washington (47.1°N). Maximum depth of instrument is 100m or within 2-5m of the seafloor. A list of more detailed information about the individual transects is included (See Supplemental Files).

ISIIS-3 was deployed at night from the research vessel, and towed the length of the transects in an undulating manner at 2.5 m/s (vessel speed 5 kts), undulating between 1m and 100m depth, or within 2m of the seafloor in waters shallower than 100m depth. A total of six transects were sampled per cruise, with the longest transects split into inshore and offshore portions sampled over two nights. Each transect was sampled in the “tow-yo” fashion throughout the deployment of the instrument. ISIIS-3 was terminated to a fiber optic winch. Data were streamed to the shipboard ISIIS-3 computer in real time. A program manager (JADE, https://sixclear.com/jade/) took the input data streams from both cameras, each sensor, and GPS data from the ship, and wrote into individual millisecond time-stamped files. Data were stored on the shipboard computer’s 16TB internal drives, then copied on to individual 6TB external drives in duplicate for each camera. Individual files were written for the CTD, GPS stream, voltage-based sensor readings (pH, dissolved oxygen, PAR), altimeter, and flowmeter, and files were written on the shipboard ISIIS-3 computer.

See Schmid et al. (2023, doi:10.3389/fmars.2023.1187771) for more information on ISIIS-3 imager and deployments on these research cruises.

Data Processing Description

Dataset Processing Description

Sensor data were written by individual publishers and millisecond time stamped. A Python script merge_environmental.py (Schmid et al., 2023, DOI: 10.5281/ZENODO.7739010) was used to merge these individual files into a final dataset based on the millisecond time stamps associated with each observation, creating a cohesive dataset over the time period sampled. Conversion factors and calibrations were applied to pH, oxygen, and irradiance voltage readings to yield final values, and chlorophyll-a was calculated using manufacturer conversions and calibration values. Conversion factors and calibrations were applied in R.

Histograms of sensor data values were used to determine extreme values to flag as potential outliers.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-2125407	NSF Division of Ocean Sciences
OCE-2125408	NSF Division of Ocean Sciences

Instruments

Altimeter

Supplied Name: Altimeter (ImageNex 850)

Supplied Description:

Instrumentation associated with ISIIS-3.

Instrument Type

Generic Name: Altimeter

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/379/

Generic Description:

An instrument that measures height above a fixed surface. The data can be used to map ocean-surface topography and generate gridded surface height fields.

Flow Meter

Supplied Name: Flowmeter (Valeport 803 ROV Current Meter)

Supplied Description:

Instrumentation associated with ISIIS-3.

Instrument Type

Generic Name: Flow Meter

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/388/

Generic Description:

General term for a sensor that quantifies the rate at which fluids (e.g. water or air) pass through sensor packages, instruments, or sampling devices. A flow meter may be mechanical, optical, electromagnetic, etc.

Fluorometer

Supplied Name: Fluorescence (WetLabs ECO-FLRT, S/N FLRT-2611)

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

In Situ Ichtyoplankton Imaging System

Supplied Name:

Supplied Description:

Instrumentation associated wth ISIIS-3 are listed in the "Instruments" section of this dataset page except:
Two linescan cameras (55 µm/pixel resolution, Bellamare ISIIS-DPI) **imagery data is not associated with this dataset "ISIIS Environmental Data"

Instrument Type

Generic Name: In Situ Ichtyoplankton Imaging System

Acronym: ISIIS

Generic Description:

The In Situ Ichthyoplankton Imaging System (ISIIS) is an underwater imaging system aimed at capturing in situ, real time images of marine zooplankton of relatively low abundance such as fish larvae and fragile gelatinous organisms. The first prototype, delivered in 2007, was attached to a relatively simple vehicle towed by an oceanographic vessel at a speed of five knots. The vehicle, and associated imaging system and sensors, was moved up and down through the water column by paying cable in and out via an oceanographic winch. Subsequently, a new vehicle has been designed with the capacity of self undulation using motor actuated dive fins.

The ISIIS system utilizes a high-resolution line-scanning camera with a Light Emitting Diode (LED) light source, modified by plano-convex optics, to create a collimated light field to back-light a parcel of water.

ISIIS was developed in collaboration between the University of Miami's Rosenstiel School of Atmospheric and Marine Science (RSMAS) and the subsea engineering company, Bellamare, LLC, located in San Diego CA. See complete description from RSMAS.

Reference:
Cowen RK and Guigand CM. 2008. In situ Ichthyoplankton Imaging System (ISIIS): system design and preliminary results. Limnol. Oceanogr. Methods. 6:126-132. doi:10.4319/lom.2008.6.126

pH Sensor

Supplied Name: pH sensor (Seabird SBE 18)

Supplied Description:

Instrumentation associated with ISIIS-3.

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

Photosynthetically Available Radiation Sensor

Supplied Name: Photosynthetically active radiation/irradiance (Biospherical QCP-2300)

Supplied Description:

Instrumentation associated with ISIIS-3.

Instrument Type

Generic Name: Photosynthetically Available Radiation Sensor

Acronym: PAR sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: Dissolved oxygen (Sea-Bird 43) with pump (SBE M5)

Supplied Description:

Instrumentation associated with ISIIS-3.

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic Description:

The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Sea-Bird SBE 49 FastCAT CTD Sensor

Supplied Name: CTD (Sea-Bird SBE 49 FastCAT)

Supplied Description:

Instrumentation associated with ISIIS-3

Instrument Type

Generic Name: Sea-Bird SBE 49 FastCAT CTD Sensor

Acronym: SBE-49

Generic Description:

The SBE 49 FastCAT is a CTD sensor for use in autonomous platforms. It contains a SBE 3P temperature sensor, a SBE 4C conductivity sensor and a strain-gauge pressure sensor as standard. It can operate in autonomus (16 Hz per sec) or polled mode (transmits each sample). The sensor is depth-rated to 350 m (plastic housing) or 7000 m (titanium housing). Accuracy: +/- 0.002 deg C (temperature), +/- 0.0003 S/m (conductivity), 0.1% of full scale range (pressure).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Time	Time of sampling, in time zone Pacific Time (PST/PDT). Measurements from individual sensors merged based on millisecond timestamp using Python code	unitless	DateTime
Cruise_ID	Cruise identifier	unitless	cruise_id
ISO_DateTime_UTC	Time of sampling, in time zone (UTC).	unitless	ISO_DateTime_UTC
Temperature	Water temperature, degrees Celsius, Sea-Bird SBE 49 FastCAT mounted on ISIIS-3 . Quality flag is in the column 'Temperature_flag', see column description for more information about what data are flagged.	degrees Celsius	temp
Conductivity	Water conductivity, measured using SeaBird SBE 49 FastCAT mounted on ISIIS-3. Quality flag is in 'Conductivity_flag', see column description for more information about what data are flagged	Siemens per meter (Siemens/m)	cond
Pressure	Pressure measured using SeaBird SBE 49 FastCat mounted on ISIIS-3. Quality flag is in 'Pressure_flag', see column description for more information about what data are flagged	decibars (dBar)	press
Depth	Depth measured using SeaBird SBE 49 FastCat mounted on ISIIS-3. Quality flag is 'Depth_flag', see column description for more information about what data are flagged	meters (m)	depth
Salinity	Salinity measured using SeaBird SBE 49 FastCat mounted on ISIIS-3. Quality flag is 'Salinity_flag', see column description for more information about what data are flagged	Practical Salinity Units (PSU)	sal
Altitude	Imagenex Model 850 Altimeter mounted on ISIIS-3. Altitude of ISIIS-3 instrument from seafloor. Only measures within 50m of seafloor, values where ISIIS-3 is greater than 50m above seafloor are blank values (null).	meters (m)	altitude
Horizontal_Speed	Relative horizontal speed of ISIIS instrument through the water, from Valeport Model 803 ROV Current Meter mounted on ISIIS-3. Quality flag is 'Horizontal_Speed_flag,' see column description for more information about what data are flagged	centimeters per second (cm/s)	hzvel
Vertical_Speed	Relative vertical speed of ISIIS instrument through the water, from Valeport Model 803 ROV Current Meter mounted on ISIIS-3. Quality flag is 'Vertical_Speed_flag,' see column description for more information about what data are flagged	centimeters per second (cm/s)	vtvel
Fluoro	Fluoroscence measured with Wet Labs FLRT mounted on ISIIS-3. Quality flag is 'Fluoro_flag,' see column description for more information about what data are flagged	counts	fluor
Latitude	Latitude from ship data streams. Merged with sensor data based on millisecond time stamp	decimal degrees	lat
Longitude	Longitude from ship data streams. Merged with sensor data based on millisecond time stamp	decimal degrees	lon
PAR	Photosynthetically active radiation, Biospherical QCP-2300 mounted on ISIIS-3. Quality flag is 'PAR_flag,' see column description for more information about what data are flagged	microEinsteins per square centimeter (uEinsteins per cm^2)	PAR
pH	Water pH from SBE 18 mounted on ISIIS-3. Quality flag is 'pH_flag,' see column description for more information about what data are flagged	unitless	pH
Oxygen	Dissolved oxygen from SBE 43 mounted with SBE 5M pump on ISIIS-3. Quality flag is 'Oxygen_flag' see column description for more information about data flagging	milliliters per liter (ml/L)	O2
chl_a_ul	Conversion from fluorometer counts to chlorophyll-a. Relationship between fluorescence at chlorophyll-a from WetLabs calibration, calculated from a phytoplankton monoculture relationship. Quality flag is 'chl_a_flag', see column description for more information about what data are flagged	microliters per liter (uL/L)	chl_a
Temperature_flag	Value is 1 where Depth is less than 1m or greater than 110m	unitless	q_flag
Conductivity_flag	Value is 1 where Pressure is less than 1dbar, or greater than 110 dbar, or blank value (null).	unitless	q_flag
Pressure_flag	Value is 1 for salinity values <20 psu or blank value (null).	unitless	q_flag
Depth_flag	Value is 1 where Conductivity < 3 S/m or blank value(null).	unitless	q_flag
Salinity_flag	Value of 1 where blank value (null).	unitless	q_flag
Horizontal_Speed_flag	Value of 1 where 'Horizontal_Speed' is less than -500 cm/s, greater than 500 cm/s, or blank value (null).	unitless	q_flag
Vertical_Speed_flag	Value of 1 where 'Vertical_Speed' is greater than 4000 cm/s, less than 0 m/s or blank value (null).	unitless	q_flag
Fluoro_flag	Value of 1 where Fluorometer value is blank value (null)., less than 0, or greater than 4000	unitless	q_flag
PAR_flag	Value of 1 where PAR is greater than 0.1 µE/s, less than 0 µE/s or blank values (null).	unitless	q_flag
pH_flag	Value of 1 where pH is blank value (null) or less than 7	unitless	q_flag
Oxygen_flag	Value of 1 where blank value (null).	unitless	q_flag
chl_a_flag	Value of 1 where chl_a_ul is blank value (null)., less than 0 microliters per liter, or greater than 45 microliters per liter	unitless	q_flag
flag_totals	Total sum of all flags in data. Ranges from 0 to 12, where 0 has no quality flags, and 12 represents data that are the most likely to contain errors or extreme data to be highly scrutinized	unitless	q_flag

Database

Contribute Data

Dataset: ISIIS Environmental Data
Deployment: MGL2207

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: ISIIS Environmental DataDeployment: MGL2207

Dataset acquisition description

Dataset Processing Description

Dataset: ISIIS Environmental Data
Deployment: MGL2207