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
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.639382.1

Spatial Extent: N:33.312 E:-77.86 S:32.483 W:-78.748

Temporal Extent: 2012-01-20 - 2012-04-04

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:

James Nelson (Skidaway Institute of Oceanography, SkIO)

Co-Principal Investigator:

Catherine Edwards (Skidaway Institute of Oceanography, SkIO)

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:

Version Date:

2016-02-26

Restricted:

Validated:

Yes

Current State:

Final no updates expected

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)

Abstract:

Moored time-series records of temperature measured every 5 minutes (300sec) by 25 Onset HOBO Water Temperature Data Loggers mounted on a tautline mooring. Collected from the LB1 Mooring, R/V Savannah (LB-2012-LB1, SAV-12-02) in the South Atlantic Bight continental shelf off Long Bay during 2012.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2016-02-26	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.639382.1	2023-03-09

Methods & Sampling

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).

Data 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”).

Data Files

File

Matlab file of temperature data for LongBay mooring #1
filename: lb1_temp_tchain.mat

(MATLAB Data (.mat), 7.94 MB)
MD5:41d91bc583c3e6e7bcc8ff938c593c16

A matrix of corrected temperatures for 25 vertical levels as indicated by the variable “mab” (meters above bottom).

variable:                 variable description;     units

dn_hobo:	         MATLAB datenum time;	  days since 0000-01-01T00:00 UTC

tem_mat_fix:	         water temperature matrix; degrees Celsius

mab:	                 meters above bottom - uncorrected;	meters

mab_corrected:	         meters above bottom - corrected;	meters

wc_depth:	         water column depth;	  meters

sensor_depth_corrected:	 sensor depth below surface; meters

hobo_corr:	         offsets applied to temperatures; degrees Celsius

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