Dataset: LB_2012_LB1_tchain

Name: Moored time-series records for temperature collected from the LB1 Mooring, R/V Savannah (LB-2012-LB1, SAV-12-02) in the South Atlantic Bight (SAB) continental shelf off Long Bay during 2012 (Long Bay Wintertime Bloom project)
Published: 2016-02-26
License: https://creativecommons.org/licenses/by/4.0/
Keywords: oceans

Cite This Dataset

Project:

Mechanisms of nutrient input at the shelf margin supporting persistent winter phytoplankton blooms downstream of the Charleston Bump (Long Bay Wintertime Bloom)

Principal Investigator:

Dr James Nelson (Skidaway Institute of Oceanography, SkIO)

Co-Principal Investigator:

Catherine Edwards (Skidaway Institute of Oceanography, SkIO)

Dr Harvey E. Seim (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Contact:

Sara Haines (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2016-02-26

Validated:

Current State:

Preliminary and in progress

Data URL:

https://www.bco-dmo.org/dataset/639382/data

Moored time-series records for temperature collected from the LB1 Mooring, R/V Savannah (LB-2012-LB1, SAV-12-02) in the South Atlantic Bight (SAB) continental shelf off Long Bay during 2012 (Long Bay Wintertime Bloom project)

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Description

Time series of temperature measured every 5 minutes (300sec) by 25 Onset HOBO Water Temperature Data Loggers mounted on a tautline mooring.

Download the Matlab file: lb1_temp_tchain.mat

Acquisition Description

Onset HOBO temperature data loggers were attached to a tautline mooring from near-bottom to 25 m above bottom. Sampling was set for every 300 seconds (5min).

Processing Description

The original HOBO temperatures were adjusted to match the near-bottom logger during a well-mixed period [ 29 Jan 2012 from 00:00 to 12:00 GMT ]. The near-bottom logger temperatures were also very similar to those recorded by the SeaBird MicroCat at the nearby LB1 ADCP mooring.

The individual logger files are organized in a matrix of corrected temperatures for 25 vertical levels as indicated by the variable “mab”.

Observations before and after the mooring was in place have been removed.

The heights of the loggers above the bottom have been corrected for tilt using a pressure sensor mounted near the top of the mooring and assuming a linear drawdown of the mooring line. These heights are saved as “mab_corrected”. The depths of the sensors has also been computed using these data and depth record from the LB1 bottom mounted CTD interpolated to the time base of the HOBO loggers. The variable is “sensor_depth_corrected” and utilizes the water column depth (“wc_depth”).

Relevant Reference:

IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of seawater - 2010: Calculation and use of thermodynamic properties. Intergovernmental Oceanographic Commission, Manuals and Guides No. 56, UNESCO (English), 196 pp. Available from http://www.TEOS-10.org

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1032276
NSF Division of Ocean Sciences	OCE-1032285

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SAV-12-02	LB 2012 Deployment Cruise	2012-01-18	R/V Savannah	Dr James Nelson (Chief Scientist) Catherine Edwards (Co-Chief Scientist)	data info
LB_2012_LB1		2012-01-20	LB1 Mooring	Dr James Nelson (Chief Scientist) Catherine Edwards (Co-Chief Scientist)	data info

Instruments

Temperature Logger

(more info)

Short Name:

Generic Description

Records temperature data over a period of time.

PI supplied instrument name:

Dataset-specific description

Onset HOBO temperature data loggers

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
dn_hobo	MATLAB datenum time	days since 0000-01-01T00:00 UTC	date
tem_mat_fix	water temperature matrix	degrees Celsius	temp
mab	meters above bottom - uncorrected	meters	unknown
mab_corrected	meters above bottom - corrected	meters	unknown
wc_depth	water column depth	meters	depth
sensor_depth_corrected	sensor depth below surface	meters	depth
hobo_corr	offsets applied to temperatures	degrees Celsius	temp

Database

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Dataset: LB_2012_LB1_tchain