Dataset: HOBO U22 water column temperature - Inside and outside kelp

Name: Temperature data from Onset HOBO U22 loggers deployed 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: 2021-11-15
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.864813.1

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

Temporal Extent: 2018-06-07 - 2019-08-05

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:

2021-11-15

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Temperature data from Onset HOBO U22 loggers deployed 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 Onset HOBO U22 data loggers recording at 1-minute intervals deployed at various depths on instrument moorings from June to August in 2018 and 2019. Moorings were located inside and outside of a kelp forests near the Monterey Peninsula, California, USA.

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2021-11-15	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.864813.1	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, HOBO U22 temperature loggers were deployed at PK at 6.5 and 7.3 meters above the bottom, at PO at 15.5 and 17 meters above the bottom, at EK at 9.5 and 10.7 meters above the bottom, and at EO at 12.75 and 13.7 meters above the bottom. In 2019, instruments were deployed at MK at 8 meters above the bottom, at MO at 15 meters above the bottom, at OK at 9.5 meters above the bottom, and at OO at 14 meters above the bottom.

Instruments had to be swapped out periodically during deployment due to data storage capacity. Time and depth of deployment were recorded each time a sensor deployed.

Data Processing Description

Data Processing:
Data were processed using R software version 1.4.1717. 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;
- replaced "NA" with "nd" (no data).

Data Files

File
HOBO_U22.csv (Comma Separated Values (.csv), 84.36 MB) MD5:9d3051e10b1a26e760c8bdfdf0fd325c Primary data file for dataset ID 864813

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

Onset HOBO Pro v2 temperature logger

Supplied Name: HOBO U22 temperature logger

Supplied Description:

Instrument Type

Generic Name: Onset HOBO Pro v2 temperature logger

Acronym: HOBO U22-001

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The HOBO Water Temp Pro v2 temperature logger, manufactured by Onset Computer Corporation, has 12-bit resolution and a precision sensor for ±0.2°C accuracy over a wide temperature range. It is designed for extended deployment in fresh or salt water.

Operation range: -40° to 70°C (-40° to 158°F) in air; maximum sustained temperature of 50°C (122°F) in water
Accuracy: 0.2°C over 0° to 50°C (0.36°F over 32° to 122°F)
Resolution: 0.02°C at 25°C (0.04°F at 77°F)
Response time: (90%) 5 minutes in water; 12 minutes in air moving 2 m/sec (typical)
Stability (drift): 0.1°C (0.18°F) per year
Real-time clock: ± 1 minute per month 0° to 50°C (32° to 122°F)

Additional information (http://www.onsetcomp.com/)
Onset Computer Corporation
470 MacArthur Blvd
Bourne, MA 02532

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
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

Status message

Database

Contribute Data

Dataset: HOBO U22 water column temperature - Inside and outside kelp