Dataset: Dissolved oxygen and temperature (miniDOT) - Inside and outside kelp

Name: Dissolved oxygen and temperature from PME miniDOT sensors recording at 1-minute intervals at various depths on instrument moorings inside and outside of kelp forests near the Monterey Peninsula, California, USA from June to August 2018 and 2019
Published: 2021-11-04
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.864402.1

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

Temporal Extent: 2018-06-07 - 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:

2021-11-04

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Dissolved oxygen and temperature from PME miniDOT sensors recording at 1-minute intervals at various depths on instrument moorings inside and outside of kelp forests near the Monterey Peninsula, California, USA from June to August 2018 and 2019

Abstract:

These data are from PME miniDOT sensors recording dissolved oxygen and temperature at 1-minute intervals at various depths on instrument moorings from June to August in 2018 and 2019. Data were collected at mooring sites inside and outside of kelp forests near the Monterey Peninsula, California, USA.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-11-04	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.864402.1	2022-03-30

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, instruments were deployed at PK at 1, 3, and 5 meters above the bottom; at PO at 1, 7, and 14 meters above the bottom; at EK at 1, 5, 7 meters above the bottom; and at EO at 1, 7, and 12 meters above the bottom. In 2019, instruments were deployed at MK at 1, 4, and 7.5 meters above the bottom; at MO at 1, 7, and 14.5 meters above the bottom; at OK at 1, 4, and 9 meters above the bottom; and at OO at 1, 9, and 13.4 meters above the bottom. In 2019 instruments were also deployed at the surface at all sites.

Anti-fouling plates were installed on all instruments near the sensor. Any time diving occurred near the instrument moorings, any air bubbles that collected on the sensor were brushed away.

PME MiniDOT instruments were calibrated before and after deployment to determine and correct for any drift in instruments readings. This was done by placing all instruments in a black bucket with a lid and an air stone and left to measure dissolved oxygen for 12 to 24 hours.

Data Processing Description

Data Processing:
Data were first processed using MATLAB version 9.5.0.944444 to exclude data outside of instrument deployment and correct dissolved oxygen values. This was done using a drift coefficient derived from pre- and post-calibration and a function (calc02sat) to correctly calculate dissolved oxygen concentration using temperature recorded by the instrument and salinity recorded by CTD casts at mooring sites. Data were also removed during times of diving operations on the mooring where scuba diver bubbles disrupted data quality. Data were further processed using R software version 1.4.1717 and MATLAB to combine data from all sites and years combined into one file.

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

Data Files

File
miniDOT.csv (Comma Separated Values (.csv), 314.55 MB) MD5:914c62901f2b5d4d070591a06c69476a Primary data file for dataset ID 864402

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 MiniDOT Logger

Supplied Name: PME MiniDOT

Supplied Description:

Instrument Type

Generic Name: PME MiniDOT Logger

Generic Description:

The PME miniDOT logger is a submersible sensor designed to measure water temperature and dissolved oxygen concentration. Dissolved oxygen is measured by an optode that measures lifetime-based luminescence quenching of a thin membrane. The sensing foil contains a coating with a variable fluorescence depending on the oxygen concentration of the surrounding water. The miniDOT reports in milligrams per liter (mg/L) and logs all measurements to an internal SD card. Also featured is a temperature sensor and batteries. Data can be offloaded to a computer via USB cable. The logger has an accuracy of +/- 5 percent (+/- 0.3 mg/L) for oxygen, and +/- 0.1 degrees Celsius for temperature. Temperature range is 0 to 35 degrees Celsius, oxygen range is 0 to 150 percent saturation. Depth-rated to 300 meters.

Instrument description from the manufacturer: https://www.pme.com/products/minidot

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
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
Time_zone	Indicates the local time zone (PST)	unitless	time_zone
Meters_above_bottom	Instrument height above the seafloor	meters (m)	altitude
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
Dissolved_oxygen_umol_kg	Dissolved oxygen	micromoles per kilogram (umol/kg)	O2
Dissolved_oxygen_mg_kg	Dissolved oxygen	milligrams per kilogram (mg/kg)	O2

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Database

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Dataset: Dissolved oxygen and temperature (miniDOT) - Inside and outside kelp