Dataset: Seafloor PAR - Inside and outside kelp forest

Name: Photosynthetically active radiation (PAR) from PME miniPAR loggers deployed at the seafloor near instrument moorings inside and outside of kelp forests near the Monterey Peninsula, California, USA from June to August 2018 and 2019
Published: 2021-11-16
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.865018.1

Spatial Extent: N:36.63088 E:-121.897 S:36.61795 W:-121.9188

Temporal Extent: 2018-06-14 - 2019-10-08

Project:

Collaborative Research: RUI: Building a mechanistic understanding of water column chemistry alteration by kelp forests: emerging contributions of foundation species (Kelp forest biogeochemistry)

Principal Investigator:

Kerry J. Nickols (California State University Northridge, CSUN)

Co-Principal Investigator:

Robert B. Dunbar (Stanford University)

BCO-DMO Data Manager:

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

Version:

Version Date:

2021-11-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Photosynthetically active radiation (PAR) from PME miniPAR loggers deployed at the seafloor near instrument moorings inside and outside of kelp forests near the Monterey Peninsula, California, USA from June to August 2018 and 2019

Abstract:

This data includes photosynthetically active radiation (PAR) at the seafloor near instrument moorings inside and outside of kelp forests from June to August in 2018 and 2019.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-11-16	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.865018.1	2022-04-04

Methods & Sampling

Sampling Locations:
Sampling was conducted near the Monterey Peninsula near Pacific Grove and Monterey, California, USA. Kelp sites ranged from 8.8 to 10.3 meters deep and offshore sites ranged from 13.1 to 16.5 m deep.

Instrument moorings were deployed in 2018 in the following areas: a wave-protected kelp forest, ~100 meters offshore of the protected site, in a wave-exposed site devoid of kelp (historically has had kelp), and ~100 meters offshore of the exposed site.

Instrument moorings were deployed in 2019 in the following areas: a wave-protected kelp forest, ~175 meters offshore of the protected site, in a wave-exposed kelp site, and ~180 meters offshore of the exposed site.

Location Abbreviations:
PK = Protected kelp 2018,
PO = Protected offshore 2018,
EK = Exposed ‘kelp’ 2018,
EO = Exposed offshore 2018,
MK = Protected kelp 2019,
MO = Protected offshore 2019,
OK = exposed kelp 2019,
OO = Exposed offshore 2019.

Methodology:
In 2018 and 2019, PME miniPAR loggers were deployed to the seafloor adjacent to instrument moorings. The PAR sensors were attached to cinderblocks and held in place with rebar. A mechanical wiper brush was programmed to clean the sensor every 6 hours and was active for the duration of the deployment.

Data Processing Description

Data Processing:
Data were processed using R software version 1.4.1717. Data were trimmed to exclude time outside instrument deployment. Negative values were changed to zeros (confirmed method for dealing with negative values).

BCO-DMO Processing:
- converted local date to ISO8601 format;
- created the ISO8601 date-time field in UTC.

Data Files

File
miniPAR.csv (Comma Separated Values (.csv), 101.79 MB) MD5:04d3ad788549c15bc097abf58f8a30ba Primary data file for dataset ID 865018

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1737176
NSF Division of Ocean Sciences	OCE-1737096

Deployments

None available yet

Instruments

PME miniPAR logger

Supplied Description:

Instrument Type

Generic Name: PME miniPAR logger

Generic Description:

A submersible instrument that logs PAR (Photosynthetically Active Radiation), temperature and tilt measurements. Data are recorded on an internal SD card. The sensor is a LI-192 Underwater Quantum Sensor, manufactured by LI-COR. The sensor uses a silicon photodiode and glass optical filters to create a uniform sensitivity to light wavelengths in the 400-700nm range. It measures PAR from all angles in one hemisphere. An anti-fouling wiper is available. The instrument can be configured to record at intervals between 1 and 60 minutes. It is submersible up to 100 metres. PAR measurement accuracy is dependent upon the stability of the sensor pointed towards the water surface.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Site	Site code: PK = Protected kelp 2018, PO = Protected offshore 2018, EK = Exposed kelp 2018, EO = Exposed offshore 2018, MK = Protected kelp 2019, MO = Protected offshore 2019, OK = exposed kelp 2019, OO = Exposed offshore 2019.	unitless	site
ISO_DateTime_Local	Date and time (PST) in ISO8601 format: YYYY-MM-DDThh:mm:ss Format: %Y-%m-%dT%H:%M:%S	unitless	ISO_DateTime_Local
Time_zone	Indicates the local time zone (PST)	unitless	time_zone
ISO_DateTime_UTC	Date and time (UTC) in ISO8601 format: YYYY-MM-DDThh:mm:ssZ Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
Site_depth_0_tide	Depth of the site at at 0 tide	meters (m)	depth
Latitude	Latitude	decimal degrees North	lat
Longitude	Longitude	decimal degrees West	lon
Location	Indicates if the location is Kelp or Offshore	unitless	site_descrip
Temperature_C	Temperature	degrees Celsius	temp
PAR_umol_s_m2	Photosynthetically active radiation	micromoles per second per square meter (umol s-1 m-2)	PAR
Acceleration_X	G-force	g	no_bcodmo_term
Acceleration_Y	G-force	g	no_bcodmo_term
Acceleration_Z	G-force	g	no_bcodmo_term

Status message

Database

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Dataset: Seafloor PAR - Inside and outside kelp forest