Dataset: KM1919-KM1920 hydrography and nutrients
Deployment: KM1919

KM1919-KM1920 hydrographic and nutrient data

Principal Investigator:

Allan Devol (University of Washington, UW)

Co-Principal Investigator:

Richard Keil (University of Washington, UW)

Gabrielle Rocap (University of Washington, UW)

Contact:

Allan Devol (University of Washington, UW)

BCO-DMO Data Manager:

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

Project:

Dimensions: Diversity, assembly and function of microbial communities on suspended and sinking particles in a marine Oxygen Deficient Zone (ETNP_ParticleOmics)

Permanence of the recent expansions of the OMZ and denitrification regimes in the eastern tropical North Pacific (ETNP OMZ Denitrification)

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/849711/data

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Description

Methods & Sampling

Dataset acquisition description

Data were collected CTD during cruises KM1919 and KM1920.

The CTD data has been reprocessed and aligned, and outliers have been removed. Nutrient samples were filtered (Sterivex 0.22um) before analysis and analyzed using the US-JGOFS protocols (http://usjgofs.whoi.edu/protocols_rpt_19.html). All data are considered preliminary.

Known Problems:
Calibration salinity samples analyzed using an AutoSal salinometer agreed with CTD sensor 0, but sensor 1 was significantly off. Consequently, salinity values and derived values (density, oxygen, oxygen saturation) were calculated only from sensor 0. Sensor 1 data not included.

Data Processing Description

Dataset Processing Description

Data Processing:
Raw data from the CTD was processed using SeaBird software programs (Data conversion, Align, Thermal mass, Derive, Bin average and Bottle Summary).

BCO-DMO Processing:
- converted dates from Excel format to YYYY-MM-DD;
- renamed fields to comply with BCO-DMO naming conventions;
- added Cruise_ID field based on date;
- corrected date for station 8, second occupation.

More information about this dataset deployment

Funding

Award Number	Funding Source
DEB-1542240	NSF Division of Environmental Biology
OCE-1657958	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird 911

Supplied Name: CTD-SBE 911

Supplied Description:

CTD-SBE 911; factory calibrations.

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

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

WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Supplied Name: Wet labs C-Star

Supplied Description:

Beam attenuation and transmission were by Wet labs C-Star.

Instrument Type

Generic Name: WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Acronym: WL CSTAR Trans

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0160/

Generic Description:

The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.

More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717

WETLabs ECO-FLNTU

Supplied Name: Wetlabs ECO-AFL/FL

Supplied Description:

Chlorophyll was measured by Wetlabs ECO-AFL/FL.

Instrument Type

Generic Name: WETLabs ECO-FLNTU

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0215/

Generic Description:

The ECO FLNTU is a dual-wavelength, single-angle sensor for simultaneously determining both chlorophyll fluorescence and turbidity.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise_ID	cruise designation; name	unitless	cruise_id
station	station identifier	unitless	station
Date	date (GMT); format: YYYY-MM-DD	unitless	date
Longitude	longitude, in decimal degrees	decimal degrees East	lon
Latitude	latitude, in decimal degrees	decimal degrees North	lat
Press	pressure	decibars	press
Depth	sample depth below the sea surface	meters (m)	depth
T_0	temperature sensor 0	degrees Celsiu	temp
Sal_0	salinity sensor 0	psu	sal
Sigma_theta	sigma theta	kilograms per cubic meter (kg/m3)	sigma_0
Fluor	chlorophyll a	micrograms per liter (ug/l)	fluor
Attn	Beam attenuation (loss of light) of a narrow, well collimated beam of light; beam attenuation due to particles; the particulate beam attenuation coefficient (cp)	1/m	beam_cp
Trans	light transmission, as percent	percent (%)	trans
Par	Photosynthetically Available [Active] Radiation; downwelling irradiance	microEinsteins per square meter per second (uEinsteins/m2/sec)	PAR
O2_0	O2 sensor 0	micromoles per kilogram (umol/kg)	O2
O2sat	O2 saturation sensor 0	percent (%)	O2sat
PO4	Orthophosphate (phosphate, reactive phosphorus)	micromoles per kilogram (umol/kg)	PO4
Si_OH4	Silicate (Orthosilicic Acid)	micromoles per kilogram (umol/kg)	Silicate
NO3	Nitrate	micromoles per kilogram (umol/kg)	NO3
NO2	Nitrite	micromoles per kilogram (umol/kg)	NO2
NH4	Ammonium	micromoles per kilogram (umol/kg)	NH4

Database

Contribute Data

Dataset: KM1919-KM1920 hydrography and nutrients
Deployment: KM1919

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: KM1919-KM1920 hydrography and nutrientsDeployment: KM1919

Dataset acquisition description

Dataset Processing Description

Dataset: KM1919-KM1920 hydrography and nutrients
Deployment: KM1919