Dataset: Intertidal mooring PAR

Name: PAR from rocky intertidal zone moorings along the Oregon and California coasts, 2008-2015 (ACIDIC project)
Published: 2016-09-01
Keywords: oceans

Cite This Dataset

Spatial Extent: N:44.836667 E:-123.04463 S:38.1917 W:-124.564473

Project:

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

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)

Version Date:

2016-09-01

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/657810/data

PAR from rocky intertidal zone moorings along the Oregon and California coasts, 2008-2015 (ACIDIC project)

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Description

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.

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

Funding Sources

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

Deployments

Deployment	Start Date	Platform	Investigator
BH_intertidal_2008-2015	2008-03-13	Bodega Head State Marine Reserve Intertidal Long-Term Ecological Research Site	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
CA_intertidal_2007-2013	2007-05-07	PISCO Cape Arago Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
CB_intertidal_2008-2014	2008-04-22	PISCO Cape Blanco Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
CM_intertidal_2012-2014	2012-05-09	PISCO Cape Mendocino Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
FC_intertidal_2009-2015	2009-03-06	PISCO Fogarty Creek Intertidal Long-Term Ecological Research Site	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
KH_intertidal_2008-2015	2010-01-01	Kibesillah Hill Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
MC_intertidal_2009-2015	2009-01-01	Moat Creek Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
POH_intertidal_2009-2014	2009-02-28	PISCO Port Orford Head Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
RP_intertidal_2008-2014	2008-05-09	PISCO Rocky Point Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
SH_intertidal_2009-2015	2009-03-07	PISCO Strawberry Hill Intertidal Long-Term Ecological Research Site	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info
YB_intertidal_2008-2015	2008-05-07	PISCO Yachats Beach Ecological Time-Series Station	Karina J. Nielsen (Principal Investigator) Francis Chan (Co-Principal Investigator)	data info

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

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

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

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Dataset: Intertidal mooring PAR