Dataset: daily_PAR
Deployment: NBP0104

Integrated, daily PAR data

Principal Investigator:

Dr Maria Vernet (University of California-San Diego, UCSD-SIO)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GLOBEC Southern Ocean (SOGLOBEC)

Deployment Synonyms:

GLOBECII

Coordinated Deployments:

LMG0106

Data URL:

https://www.bco-dmo.org/dataset-deployment/450435/data

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Description

Photosynthetically Available Radiation (PAR) Data
from broadscale cruises NBP0103, NBP0104, NBP0202 and NBP0204

Instrument Notes:
Biospherical Instruments GUV-500 is a 5-channel reference radiometer which typically measures cosine-corrected down welling irradiance at 305, 320, 340, 380nm and PAR (400-700nm). Cosine irradiance (EsPAR) sensors collect light impinging on a Teflon-coated diffuser and the response is proportional to the cosine of the angle of incidence.

Biospherical Instruments QSR250 system measures a single channel of scalar irradiance (PAR) and is appropriate for applications independent of the directionality of the light field, such as measurements of the flux available for photosynthesis.
-- Biospherical Instruments

Data Notes:
1. The cosine PAR value for yrday_gmt 151 year 2001 is an estimate, based on a conversion from data recorded by the QSR240 scalar sensor package.
2. Latitude and longitude have been added to this data set by the Data Management Office. These positions are the noon (12:00 hour) positions reported in the ship's alongtrack data set.
3. Scalar PAR data was extracted from the ship's alongtrack meteorological data set. The sensor package was mounted on ship's science mast.

Methods:
For additional information on methods see the on-line cruise reports, (Primary Production Sections) nbp0103, nbp0104 , nbp0202, and nbp0204.

Data contributed by:
Maria Vernet
Integrative Oceanographic Division
Scripps Institution of Oceanography
University of California San Diego
La Jolla, California 92093-0218

Phone: 1-858-534-5322
E-mail: mvernet@ucsd.edu

Last updated: December 09, 2005; gfh

Methods & Sampling

Dataset acquisition description

The cosine PAR value for yrday_gmt 151 year 2001 is an estimate, based on a conversion from data recorded by the QSR240 scalar sensor package.
Latitude and longitude have been added to this data set by the Data Management Office. These positions are the noon (12:00 hour) positions reported in the ship's alongtrack data set.
Scalar PAR data was extracted from the ship's alongtrack meteorological data set. The sensor package was mounted on ship's science mast.

Deployment-specific acquisition description

The cosine PAR value for yrday_gmt 151 year 2001 is an estimate, based on
a conversion from data recorded by the QSR240 scalar sensor package.
Latitude and longitude have been added to this data set by the Data
Management Office. These positions are the noon (12:00 hour) positions
reported in the ship's alongtrack data set.
Scalar PAR data was extracted from the ship's alongtrack meteorological
data set. The sensor package was mounted on ship's science mast.

Data Processing Description

Dataset Processing Description

For additional information on methods see the on-line cruise reports, (Primary Production Sections) nbp0104 .

Deployment-specific processing description

For additional information on methods see the on-line cruise reports,
(Primary Production Sections)
<a href="http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2%7Bdir=glo... </a>.

More information about this dataset deployment

Funding

Award Number	Funding Source
ANT-9910175	NSF Antarctic Sciences

Instruments

Photosynthetically Available Radiation Sensor

Supplied Name: Photosynthetically Available Radiation Sensors

Supplied Description:

Photosynthetically Available Radiation, PAR (400-700nm). Cosine irradiance (EsPAR) sensors collect light impinging on a Teflon-coated diffuser and the response is proportional to the cosine of the angle of incidence.

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.

Radiometer

Supplied Description:

Biospherical Instruments GUV-500 is a 5-channel reference radiometer which typically measures cosine-corrected down welling irradiance at 305, 320, 340, 380nm.
Biospherical Instruments QSR250 system measures a single channel of scalar irradiance (PAR) and is appropriate for applications independent of the directionality of the light field, such as measurements of the flux available for photosynthesis.

Instrument Type

Generic Name: Radiometer

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

Generic Description:

Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
year	year of cruise		year
yrday_gmt	year day based on Julian Calendar	YYY	yrday_gmt
length_day	length of day (decimal hours) based on time between sunrise and sunset as indicated by sustained irradiance values above 0.0 uE/cm²/sec	HH.H	length_day
lat	noon latitude position, negative = South, extracted from ship's along track data	DD.D	lat
lon	noon longitude position, negative = West, extracted from ship's along track data	DDD.D	lon
par_d_day	cosine irradiance (EsPAR), integrated over time period defined by the parameter length_day. In this case units are reported as per day	uE/cm<sup>2</sup>/day	par_d_day
par_scalar_day	scalar irradiance (PAR), (independent of direction), integrated over time period defined by the parameter length_day. In this case units are reported as per day	uE/cm<sup>2</sup>/day	par_scalar_day

Database

Contribute Data

Dataset: daily_PAR
Deployment: NBP0104

Photosynthetically Available Radiation (PAR) Data
from broadscale cruises NBP0103, NBP0104, NBP0202 and NBP0204

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Database

Contribute Data

Dataset: daily_PARDeployment: NBP0104

Photosynthetically Available Radiation (PAR) Data from broadscale cruises NBP0103, NBP0104, NBP0202 and NBP0204

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Dataset: daily_PAR
Deployment: NBP0104

Photosynthetically Available Radiation (PAR) Data
from broadscale cruises NBP0103, NBP0104, NBP0202 and NBP0204