Dataset: Biofloat_48 Hyperspectral Downwelling Plane Irradiance - Ed - Profiles

Name: Hyperspectral downwelling radiance (Ed) profiles from a Trios ARC sensor on Biofloat 48 in the subpolar North Atlantic and Iceland Basin in 2008 (NAB 2008 project)
Published: 2011-03-15
Keywords: oceans

Cite This Dataset

Spatial Extent: N:61.833 E:-19.285 S:58.699 W:-27

Project:

North Atlantic Bloom Experiment 2008 (NAB 2008)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Principal Investigator:

Eric D'Asaro (University of Washington, UW APL)

BCO-DMO Data Manager:

Theresa McKee (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

15 March 2011

Version Date:

2011-03-15

Validated:

Yes

Current State:

Final no updates expected

Hyperspectral downwelling radiance (Ed) profiles from a Trios ARC sensor on Biofloat 48 in the subpolar North Atlantic and Iceland Basin in 2008 (NAB 2008 project)

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Description

Profiles of hypersepctral downwelling plane irradiance (Ed) from TriOS ACC

Data Files

File
Biofloat_48_Ed.csv (Comma Separated Values (.csv), 380.39 MB) MD5:dee2182b6e00d8fc94cebddb9fa89490 Primary data file for dataset ID 3441

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0628107
NSF Division of Ocean Sciences	OCE-0628379

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Biofloat_48	B4-2008_Lagrangian_Float 48	2008-04-04	Biofloat 48	Eric D'Asaro (Chief Scientist) Eric Rehm (Contact)	data info

Instruments

Hyperspectral Radiometer TriOS ACC

Supplied Description:

Instrument Type

Generic Name: Hyperspectral Radiometer TriOS ACC

Acronym: TriOS ACC

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

Generic Description:

TriOS ACC Hyperspectral Radiometer Sensor

Lagrangian Float

Supplied Description:

The 2008 North Atlantic Bloom Experiment (NAB08) employed a “Lagrangian float”, custom built at the University of Washington Applied Physics Laboratory. (D’Asaro, 2003, Performance of Lagrangian Floats, Journal of Atmospheric and Oceanic Technology, Vol. 20, 896-911).

Instrument Type

Generic Name: Lagrangian Float

Generic Description:

Built at the University of Washington Applied Physics Laboratory, the Lagrangian Float is not an ARGO float. It is primarily designed to accurately follow the three-dimensional motion of water parcels within the mixed layer, through a combination of neutral buoyancy and high drag provided by a one meter diameter black drogue. Typical buoyancies of a few grams result in vertical velocities relative to the water of a few mm/s, small compared to the cm/s turbulent velocities in the mixed layer. The float’s motion within the mixed layer thus closely imitates that of a planktonic organism. The float can also profile vertically. It sends data and receives commands using the Iridium satellite system. The float is designed to accommodate a wide variety of sensors.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise_ID	Cruise identifier	dimensionless	cruise_id
float_cycle	index counting float cycles	dimensionless	float_cycle
julian_day_yr0	time when sample was taken in decimal days since Jan-0-0000 (Matlab)	dimensionless	julian_day_yr0
latitude	latitude	decimal degrees	lat
longitude	longitude	decimal degrees	lon
start_date	date sampling begins	YYYYMMDD	date_begin
start_time	time sampling begins	HHMM	time_begin
end_date	date sampling ends	YYYYMMDD	date_end
end_time	time sampling ends	HHMM	time_end
press	water pressure at measurement	decibars	press
depth	depth at which sample was taken	meters	depth
temp	Temperature	degrees Celsius	temp
potemp	Potential Temperature	degrees Celsius	potemp
sal	Salinity	dimensionless	sal
sigma_0	water potential density minus 1000	kilograms/meter^3	sigma_0
yrday	Yearday 2008. Yearday 1 is 2008-01-01:00:00:00Z	dimensionless	yrday
wavelength	Calibrated wavelength (256 channels), with measurements valid from 320-950 nm. Wavelengths outside this range contain dark pixel data for measuring dark current. Spectral resolution is ~3.3 nanometers (instrument: TriOS ACC)	nanometers	wavelength
Ed	TriOS ACC hyperspectral downwelling plane irradiance E_d(λ) where λ = 320-950 nm. Size is [n x 256]	Watts per meter squared per nanometer	Ed
PAR	Spectrally-integrated dowelling planar irradiance, in PAR units (400-700 nm)	micromol photons per meter squared per steradian	PAR
tilt	Calibrated float inclination angle (tilt) from vertical Degrees	degrees	float_tilt
mode	0 = down profile 1 = settle 2 = up profile 3 = drift_iso 5 = drift_ml	dimensionless	float_operational_mode

Status message

Database

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Dataset: Biofloat_48 Hyperspectral Downwelling Plane Irradiance - Ed - Profiles