Dataset: PE21-18 Nutrients

Name: Nutrient concentrations from R/V Pelican cruise PE21-18 in the Northern Gulf of Mexico in April and May 2021
Published: 2022-09-06
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.879560.1

Spatial Extent: N:28.8686 E:-90.4903 S:28.6083 W:-91.6167

Temporal Extent: 2021-04-27 - 2021-05-02

Project:

CAREER: Investigating aerobic microbial respiration dynamics in coastal hypoxia (Coastal O2 Respir)

Principal Investigator:

J. Cameron Thrash (University of Southern California, USC)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-09-06

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Nutrient concentrations from R/V Pelican cruise PE21-18 in the Northern Gulf of Mexico in April and May 2021

Abstract:

This dataset includes marine chemistry measurements (PO4, SiOH4, NO3, NO2, NH4) from the "Microbial DO respir" cruise on R/V Pelican (cruise ID PE21-18) in the Northern Gulf of Mexico during April-May 2021. Surface and bottom water samples were collected in duplicate at five stations.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2022-09-06	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.879560.1	2023-07-05

Methods & Sampling

Sampling was conducted on R/V Pelican cruise PE21-18 in the Northern Gulf of Mexico during April-May 2021. Surface and bottom water samples were collected in duplicate at five stations.

Duplicate water samples from surface and bottom water at each station were collected from Niskin bottles attached to the CTD rosette into polycarbonate carboys and subsequently filtered via peristaltic pumping and masterflex tubing through 2.7 µm Whatman GF/D and 0.22 µm Sterivex filters. This filtrate was collected into 50 mL Falcon tubes and immediately stored at -20 degrees Celsius. Samples were shipped frozen to the University of Washington Marine Chemistry Laboratory for analysis. Details on analysis protocols and instruments can be found at https://www.ocean.washington.edu/story/Marine_Chemistry_Laboratory

Details on sample processing for this dataset can be found in the attached Supplemental File "PE21-18_Nutrients_File_Header.pdf".

Data Processing Description

BCO-DMO Processing:
- added station latitude and longitude from the separate file of station locations for PE22-03;
- renamed fields to comply with BCO-DMO naming conventions;
- rounded numeric columns to same precision shown in the original Excel file;
- added column for Station ID number;
- empty/blank values are filled with "nd" (no data).

Data Files

File
pe2118_nutrients.csv (Comma Separated Values (.csv), 1.87 KB) MD5:cef91cbf6c574b8ac8277234be4b9d64 Primary data file for dataset ID 879560.

Supplemental Files

File
PE21-18_Nutrients_File_Header.pdf (Portable Document Format (.pdf), 336.86 KB) MD5:812418b7df35e47e3fd66cd238de507f Sample processing information from the University of Washington Marine Chemistry Laboratory for dataset "PE21-18 Nutrients" (879560); PI: Cameron Thrash.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1945279

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
PE21-18	Microbial DO respir	2021-04-27	R/V Pelican	J. Cameron Thrash (Chief Scientist)	data info

Instruments

Niskin bottle

Supplied Name: Niskin bottles

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Nutrient Autoanalyzer

Supplied Name: SEAL AA3

Supplied Description:

Instrument Type

Generic Name: Nutrient Autoanalyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/

Generic Description:

Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Seq	Internal ID number used by the lab	unitless	no_bcodmo_term
Bottle	Bottle number	unitless	bottle
Sample_ID	Sample ID number	unitless	sample
Station_ID	Station ID number	unitless	station
Latitude	Station latitude	degrees North	lat
Longitude	Station longitude	degrees East	lon
Depth	Sample depth	meters (m)	depth
Dilution_Factor	Dilution factor	unitless	dilution
PO4	Concentration of PO4 (calcuated value)	micromolar (uM)	PO4
SiOH4	Concentration of SiOH4 (calcuated value)	micromolar (uM)	Silicate
NO3	Concentration of NO3 (calcuated value)	micromolar (uM)	NO3
NO2	Concentration of NO2 (calcuated value)	micromolar (uM)	NO2
NH4	Concentration of NH4 (calcuated value)	micromolar (uM)	NH4

Database

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Dataset: PE21-18 Nutrients