Dataset: Baja Safe Spaces 2018: CTD

Name: CTD data from Nearshore Isla Natividad, Baja California Mexico from July to August of 2018
Published: 2022-03-24
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.872345.1

Spatial Extent: N:27.8925 E:-115.1648 S:27.863 W:-115.2192

Temporal Extent: 2018-07-24 - 2018-08-01

Project:

Collaborative Research: Evaluating how abalone populations in the California Current are structured by the interplay of large-scale oceanographic forcing and nearshore variability (Abalone Safe Places)

Principal Investigator:

Stephen G. Monismith (Stanford University)

Co-Principal Investigator:

Clifton Brock Woodson (University of Georgia, UGA)

Scientist:

Derek Fong (Stanford University)

Student:

Margaret Daly (Stanford University)

BCO-DMO Data Manager:

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

Version:

Version Date:

2022-03-24

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD data from Nearshore Isla Natividad, Baja California Mexico from July to August of 2018

Abstract:

CTD data collected as part of a Nearshore study conducted Isla Natividad, Baja California Mexico from July to August of 2018 that included currents, water level, wave data, temperature, and dissolved oxygen.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2022-03-24	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.872345.1	2023-05-22

Methods & Sampling

Location: Isla Natividad, Baja California, Mexico (27º53.215 N, 115º11.325 W depth 15-30m)

From July - Aug of 2018, numerous instruments were deployed around Isla Natividad in Baja California Mexico. These included CTD’s which were attached to a steel cable thermistor chain. CTD’s were 1 meter above the bottom, vertically attached.

Folders and filenames included in this dataset contain transect and target depth identifiers.
Prefix letters represent a cross-shore transect line and the 2 numerals represent the approximate target depth of a mooring along that line. There were 4 transects (LG,PP, MP, BB) and moorings were targeted at 15, 20, and 25m on each transect. For example "BB15" indicates transect BB and target mooring depth of 15m. See the supplemental file "deploy_info.csv" for a list of transect-mooring deployments included in this dataset.

Data Processing Description

MATlab 2019 b is used for all QA/QC and processing. The following steps are taken for QA/QC

- NaN if salinity > 5* the standard deviation
- NaN if temperature > 5* the standard deviation
- NaN if DO > 5* the standard deviation

BCO-DMO Data Manager Processing Notes:

* .mat file context examined and example structures provided in data file descriptions.

* .mat and .txt vector and array exports provided by the submitter were bundled into .zip files and attached to dataset.

* deploy_info.csv was created by extracted the contents of every *_Info*.txt file within the provided file hierarchy. The Deployment ID was extracted from the filename of the _Info file.
* ISO_DateTime_UTC_Start was added as a column by converting start time in Mountain Time

Data Files

File

CTD data
filename: CTD.zip

(ZIP Archive (ZIP), 10.09 MB)
MD5:6b5aa87c0042ac6d318f2f694169e4bb

CTD data. 

Contains matlab .mat files and txt files containing exported vectors from the .mat file.

This file bundle contains subfolders named by deployment ID (transectID+target_depth).  Each folder contains a file ending with _Info.txt which contains deployment information such as start and end time, lat,lon, depth, units.

Within each folder is the .mat file for the deployment containing a structure "DATA"

% example DATA struct                                  
    %   DATA      1x1             5247936  struct              
    % 
    %      Temp: [1×163977 double]
    %       Sal: [1×163977 double]
    %     Depth: [1×163977 double]
    %      Time: [1×163977 double]
    
Units: temperature (Celcius), Salinity (psu), depth (m), DO (mg/L)

Time is a matlab datenum type in time zone Mountain Time (MT).

Supplemental Files

File

Deployment Information
filename: deploy_info.csv

(Comma Separated Values (.csv), 5.04 KB)
MD5:85b804862d2c8f74418595fe27222216

Deployment Information for transects and moorings.

Columns (parameter) info:
Data_Type, Data type collected (e.g. MiniDOT,CTD)
Deployment_ID, Deployment identifier. Prefix letters represent a cross-shore transect line and the 2 numerals represent the approximate target depth of a mooring along that line. 
Transect_ID, There were 4 transects (LG,PP, MP, BB). 
Target_Depth,  Moorings targed deployment depth along transect. Targeted at 15, 20, and 25m on each transect.
Start_Date,Start Date local time zone (MT) in format "%d-%b-%Y %H:%M:%S"
End_Date, End Date local time zone (MT)  in format "%d-%b-%Y %H:%M:%S"
Time_Zone, Timezone (MT, mountain time) used for Start_Date and End_Date
ISO_DateTime_UTC_Start, Start Date time zone UTC in ISO 8601 format "%Y-%m-%dT%H:%M:%SZ"	
Latitude, latitude in decimal degrees
Longitude, longitude in decimal degrees
Units,units used for the data type
Depth, notes "Bottom(seafloor) or no value"

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1736830

Deployments

None available yet

Instruments

CTD Sea-Bird MicroCAT 37

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird MicroCAT 37

Acronym: CTD MicroCAT 37

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/350/

Generic Description:

The Sea-Bird MicroCAT CTD unit is a high-accuracy conductivity and temperature recorder based on the Sea-Bird SBE 37 MicroCAT series of products. It can be configured with optional pressure sensor, internal batteries, memory, built-in Inductive Modem, integral Pump, and/or SBE-43 Integrated Dissolved Oxygen sensor. Constructed of titanium and other non-corroding materials for long life with minimal maintenance, the MicroCAT is designed for long duration on moorings.

In a typical mooring, a modem module housed in the buoy communicates with underwater instruments and is interfaced to a computer or data logger via serial port. The computer or data logger is programmed to poll each instrument on the mooring for its data, and send the data to a telemetry transmitter (satellite link, cell phone, RF modem, etc.). The MicroCAT saves data in memory for upload after recovery, providing a data backup if real-time telemetry is interrupted.

Parameters

None available yet

Status message

Database

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Dataset: Baja Safe Spaces 2018: CTD