Dataset: Temperature data profiles collected from the sediments off the South Atlantic Bight

Name: Temperature data profiles collected from the sediments off the South Atlantic Bight
Published: 2022-10-25
Keywords: Submarine groundwater discharge, SGD, Heat as a tracer, oceans

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Spatial Extent: N:32.75 E:-79.75 S:32.75 W:-79.75

Temporal Extent: 2018-08-08 - 2020-11-16

Project:

Groundwater sources of "new" N for benthic microalgal production in the South Atlantic bight (SAB BMA)

Principal Investigator:

James L. Pinckney (University of South Carolina)

Co-Principal Investigator:

Alicia M Wilson (University of South Carolina)

Scientist:

Jacob L. Vincent (University of South Carolina)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-10-25

Restricted:

Validated:

Current State:

Data not available

Abstract:

These data include thermal profiles from sediments off the South Atlantic Bight offshore from Isle of Palms, Charleston County, South Carolina 32°45’N 79°45’W. Data from 2018 through 2020 were collected using temperature loggers that were inset in PVC stakes and jetted into the seafloor. Instruments used for temperature collection were Onset HOBO TidbiT v2 data loggers. Heat has been widely used as an inexpensive tracer in groundwater systems (Anderson 2005; Constanz 2008), including studies of submarine groundwater discharge (SGD) (Taniguchi 2000; Moore and Wilson 2005; Martin et al 2006).

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Methods & Sampling

Heat has been widely used as an inexpensive tracer in groundwater systems (Anderson 2005; Constanz 2008), including studies of SGD (Taniguchi 2000; Moore and Wilson 2005; Martin et al 2006). In our system, the temperature of sub-seafloor porewaters differs from the temperature of overlying seawater owing to seasonal variations in surface temperature. We can thus use heat in two ways: (1) to measure the depth of rapid flushing events and (2) to estimate rates of long-term regional flow.

Instruments: Onset HOBO TidbiT v2 Water Temperature Data logger with 12-bit resolution and has ±0.2 °C accuracy. It is designed for outdoor and underwater environments and is waterproof to 300 m (1000 ft). Bluetooth transmission allows users to offload data.

Location: 10 - 20 kilometers offshore from the Isle of Palms, Charleston County, South Carolina 32°45’N 79°45’W. Day trips aboard a dive boat 2-4 times per summer during the years 2018-2020. Dive boat: Trinity, Charleston SC.

Data Processing Description

Raw data is taken from loggers via Bluetooth. Temperature loggers were calibrated before deployment and temperature error was removed from raw data.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1736557

Deployments

None available yet

Instruments

Onset HOBO Pro v2 temperature logger

Supplied Name: Onset HOBO TidbiT v2 Water Temperature Data 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

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Database

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Dataset: Temperature data profiles collected from the sediments off the South Atlantic Bight