Dataset: Intertidal mooring PAR
Deployment: CB_intertidal_2008-2014

PAR from intertidal moorings along Oregon and California coasts, 2008-2015

Principal Investigator:

Karina J. Nielsen (San Francisco State University, SFSU)

Co-Principal Investigator:

Francis Chan (Oregon State University, OSU)

Sally D. Hacker (Oregon State University, OSU)

Bruce A. Menge (Oregon State University, OSU)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

The role of calcifying algae as a determinant of rocky intertidal macrophyte community structure at a meta-ecosystem scale (ACIDIC)

Current State:

Final no updates expected

Version Date:

2016-08-30

Data URL:

https://www.bco-dmo.org/dataset-deployment/657823/data

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Description

Methods & Sampling

Dataset acquisition description

Photosynthetically Active Radiation (PAR; 400-700 nm) was recorded using a pair of data logging PAR sensors deployed to the shoreline at different elevations. Irradiance was measured using a LiCor 190 PAR sensor together with a universal transconductance amplifier (EME systems) to amplify the micro-amp current output of the PAR sensor and then recorded to a datalogger (Onset Hobo). The entire assembly was housed in a custom-molded waterproof case with a window of spectrally unbiased Plexiglas. The base had stainless steel mesh straps embedded in it to bolt the case to the rock, and leveling feet to level the sensor. The case was affixed to the rock by eight stainless steel lag screws and high tension plastic anchors set into pre-drilled holes. PAR data were recorded every 15 minutes. One PAR sensor (UWPAR) was located in the intertidal zone (~ 0-0.3 m above MLLW) and therefore experiences both underwater and above water periods, depending on the tidal cycle. The second PAR sensor (TPAR) was deployed well above the intertidal zone on an adjacent terrestrial rocky bench or cliff and only measures out of water irradiance.

Data Processing Description

Dataset Processing Description

The voltage data were converted to photosynthetic photon flux (mmol m^-2 s^-1) using the LiCOR scale factors associated with each PAR sensor (PAR = (voltage/0.2)*scale factor) (Table 1). The data for each year were normalized to the maximum value on a clear day near the summer solstice at local solar noon, and then scaled to the modeled clear sky value for PPF for local solar noon using an online calculator (http://clearskycalculator.com/quantumsensor.htm) based on the ASCE Standardized Reference Evapotranspiration Equation, American Society of Civil Engineers.

Reston, Virginia, USA. 2005 (http://www.kimberly.uidaho.edu/water/asceewri/index.html).

Table 1. LiCOR manufacturer scale factors (PDF)

BCO-DMO Processing:

- Replaced blanks in site name with underscores
- Commented out line 2, the units
- Converted from PC to Unix formatted .csv files
- Converted to jgofs format for faster serving

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1061233	NSF Division of Ocean Sciences
OCE-1061530	NSF Division of Ocean Sciences
OCE-1519401	NSF Division of Ocean Sciences

Instruments

Radiometer

Supplied Name:

Supplied Description:

Irradiance was measured using a LiCor LI-190R Quantum Sensor together with a universal transconductance amplifier (EME systems) to amplify the micro-amp current output of the PAR sensor and then recorded to a datalogger (Onset Hobo).

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
site_name	mooring location name	unitless	site
site_code	mooring location code	unitless	site
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
year	year	year	year
month	month	month	month
day	day of month (UTC)	days	day
hour	hour of day (UTC)	hours	hour_gmt
minute	minutes (UTC)	minutes	minute_gmt
second	seconds (UTC)	seconds	seconds_gmt
ISO_DateTime_UTC	Date/Time (UTC) based on ISO 8601:2004E. Format: YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)	unitless	ISO_DateTime_UTC
yrday_utc	UTC day and decimal time: eg. 326.5 for the 326th day of the year or November 22 at 1200 hours (noon).	unitless	yrday_utc
PAR	Photosynthetically Available [Active] Radiation	micromoles photons/meter^2/second	PAR
serial_no	serial number of PAR sensor	unitless	inst_serial_numb
location	whether mooring is on land or intertidal zone	unitless	site_descrip

Database

Contribute Data

Dataset: Intertidal mooring PAR
Deployment: CB_intertidal_2008-2014

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Intertidal mooring PARDeployment: CB_intertidal_2008-2014

Dataset acquisition description

Dataset Processing Description

Dataset: Intertidal mooring PAR
Deployment: CB_intertidal_2008-2014