Dataset: AE1913 CTD data

Name: CTD profiles from R/V Atlantic Explorer cruise AE1913 in the Sargasso Sea in June of 2019
Published: 2023-12-07
Keywords: oceans

View Data: Data not available yet

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Spatial Extent: N:38.528372 E:-64.231587 S:31.617488 W:-70.84278

Sargasso Sea, beginning at Bermuda Atlantic Time-series Station (BATS) and ending in the northeast shelf of Woods Hole Oceanographic Institution (WHOI)

Temporal Extent: 2019-06-16 - 2019-06-27

Project:

Collaborative Research: Direct Characterization of Adaptive Nutrient Stress Responses in the Sargasso Sea using Protein Biomarkers and a Biogeochemical AUV (Nutrient Stress Responses and AUV Clio)

Principal Investigator:

Mak A. Saito (Woods Hole Oceanographic Institution, WHOI)

Scientist:

Natalie Cohen (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Version:

Version Date:

2023-12-07

Restricted:

Validated:

Current State:

Data not available

CTD profiles from R/V Atlantic Explorer cruise AE1913 in the Sargasso Sea in June of 2019

Abstract:

Oceanographic samples were collected onboard the R/V Atlantic Explorer between June 16th - 28th 2019, along a transect beginning at the Bermuda Atlantic Time-series Station (BATS) in the Sargasso Sea and terminating in northeast US continental shelf waters. The R/V Atlantic Explorer CTD provided physicochemical contextualization (temperature, oxygen, fluorescence, turbidity) and was deployed at all stations except the last one, St. 9, due to time restrictions.

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Description

See the "Related Datasets" section on this page for the ELOG from cruise AE1913 and other closely related data.
* Also see all datasets related to the same cruise AE1913: https://www.bco-dmo.org/deployment/916412

Methods & Sampling

The RV Atlantic Explorer CTD was deployed at each station along the BATS to WHOI transect by the crew (see supplemental station list and R2R ELOG). Continuous measurements were collected on these casts. Complementary underway data and other processed products from this cruise on R2R (AE1913, doi: 10.7284/908544).

Problems/Issues

PAR data not collected. PAR column was removed from the primary data table for this dataset (the Data File "916411_v1_ctd.csv"). The supplemental zip files containing seabird files (raw, processed) contain the PAR column but should not be used.

Data Processing Description

SeaBird software was used to process raw CTD files and convert to .cnv. (Seasave V 7.26.7.107)

BCO-DMO Processing

* Processed (depth binned) data tables provided within in seabird files (<castname>.cnv) were imported into the BCO-DMO data system with the missing value identifier specified in the seabird header information "-9.990e-29" as the missing data identifier. This table is the primary bco-dmo table for this dataset. The source .cnv files were downloaded from a shared google drive on 20231229T170156Z.
* PAR column removed upon submitter request due to sensor failure during cruise.
* The timestamp for each cast was extracted from the standard seabird header within each file and added into data column "NMEA_DateTime_UTC" and converted Example:
line: "* NMEA UTC (Time) = Jun 27 2019 03:02:35"
included as NMEA_DateTime_UTC "2019-06-27T03:02:35Z"

* The raw seabird files and processed .cnv file format were also added to the supplemental files section within .zip packages.

* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1658030

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AE1913	Clio-BATS-WHOI	2019-06-16	R/V Atlantic Explorer	Mak A. Saito (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: SeaBird SBE-911+

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
latitude	latitude	decimal degrees	lat
longitude	longitude	decimal degrees	lon
t090C	Temperature [ITS-90]	degrees Celsius (deg C)	temp
prDM	Pressure	Digiquartz (db)	press
depSM	Depth (salt water)	meters (m)	depth
flC	Fluorescence. Chelsea Aqua 3 Chl Con	Micrograms per liter (ug/l)	fluor
sbeox0Mm_L	Dissolved oxygen. Seabird parameter name sbeox0Mm/L. Oxygen, SBE 43	micromoles per liter (umol/l)	O2
c1mS_cm	Conductivity 2. Seabird parameter name c1mS/cm	milliSiemens per centimeter (mS/cm)	cond
c0mS_cm	Conductivity. Seabird parameter name c0mS/cm	milliSiemens per centimeter (mS/cm)	cond
CStarTr0	Beam Transmission, WET Labs C-Star	Percent (%)	trans
sal00	Salinity, Practical	Practical Salinity Units (PSU)	sal
flag	quality flag (0.000e+00 indicates good scan, -9.990e-29 indicates a bad scan)	unitless	q_flag
Cast	cast identifier	unitless	cast
NMEA_DateTime_UTC	DateTime (in UTC time zone) from navigation data, National Marine Electronic Association (NMEA). This value was extracted from the standard seabird header information for the cast and converted to ISO 8601 format. Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC

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Dataset: AE1913 CTD data