Dataset: Chesapeake Bay Nutrients 2021

Name: Nutrients from CTD casts conducted on R/V Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021
Published: 2023-05-30
Keywords: OMZ, nitrite oxidation, Chesapeake Bay, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.896158.1

Spatial Extent: N:39.14 E:-76.0926 S:37.2702 W:-76.4398

Temporal Extent: 2021-08-04 - 2021-08-10

Project:

Nitrite Oxidation in Oxygen Minimum Zones (NO2Ox_OMZs)

Principal Investigator:

Bess B. Ward (Princeton University)

BCO-DMO Data Manager:

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

Version:

Version Date:

2023-05-30

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Nutrients from CTD casts conducted on R/V Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021

Abstract:

This dataset includes nutrient data from R/V Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2023-05-30	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.896158.1	2023-06-22

Methods & Sampling

Water samples were collected using a 12 x 10-liter Niskin bottle rosette sampler equipped with a conductivity, temperature, and pressure instrument package (SBE9, Sea-Bird Electronics, Bellevue, Washington, U.S.A.), a sensor for dissolved oxygen (SBE43, Sea-Bird), and a sensor for chlorophyll fluorescence (FluoroWetlabECO, AFL FL Sensor). NH4, NO2, and urea were measured on board immediately after sample collection. NO3 was assayed in the home laboratory on samples stored frozen at the time of collection.

Data Processing Description

BCO-DMO Processing:
- renamed fields to comply with BCO-DMO naming conventions.

Data Files

File
cb_2021_nutrients.csv (Octet Stream, 4.25 KB) MD5:7ca1c706723ac1bdcfe2538bac007cb5 Primary data file for dataset ID 896158.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1946516

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
HRS2110	HRS 21-10 CB2021 Chesapeake Bay 2021	2021-08-03	R/V Hugh R. Sharp	Bess B. Ward (Chief Scientist)	data info

Instruments

Chemiluminescence NOx Analyzer

Supplied Name: Teledyne Chemiluminescence NO/NOx Analyzer (Model 200E)

Supplied Description:

Used to measure NO3

Instrument Type

Generic Name: Chemiluminescence NOx Analyzer

Generic Description:

The chemiluminescence method for gas analysis of oxides of nitrogen relies on the measurement of light produced by the gas-phase titration of nitric oxide and ozone. A chemiluminescence analyzer can measure the concentration of NO/NO2/NOX.

One example is the Teledyne Model T200: https://www.teledyne-api.com/products/nitrogen-compound-instruments/t200

Niskin bottle

Supplied Name: 10-liter Niskin bottle rosette

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.

Turner Designs Trilogy fluorometer

Supplied Name: Turner Designs Trilogy Fluorometer

Supplied Description:

Used to measure NH4

Instrument Type

Generic Name: Turner Designs Trilogy fluorometer

Acronym: Turner Trilogy

Generic Description:

The Trilogy Laboratory Fluorometer is a compact laboratory instrument for making fluorescence, absorbance, and turbidity measurements using the appropriate snap-in application module. Fluorescence modules are available for discrete sample measurements of various fluorescent materials including chlorophyll (in vivo and extracted), rhodamine, fluorescein, cyanobacteria pigments, ammonium, CDOM, optical brighteners, and other fluorescent compounds.

UV Spectrophotometer-Shimadzu

Supplied Name: UV-visible spectrophotometer (UV-2450, Shimadzu, Japan)

Supplied Description:

Used to measure NO2 and urea

Instrument Type

Generic Name: UV Spectrophotometer-Shimadzu

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

The Shimadzu UV Spectrophotometer is manufactured by Shimadzu Scientific Instruments (ssi.shimadzu.com). Shimadzu manufacturers several models of spectrophotometer; refer to dataset for make/model information.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cast	cast number	unitless	cast
Station	station name	unitless	station
Date	date of cast Format: %Y-%m-%d	unitless	date
Latitude	Latitude (positive values = North)	decimal degrees	lat
Longitude	Longitude (negative values = West)	decimal degrees	lon
Depth	depth	meters (m)	depth
NH4	ammonium concentration	micromolar (uM)	NH4
NH4_stdev	ammonium concentration standard deviation	micromolar (uM)	NH4
NO2	nitrite concentration	micromolar (uM)	NO2
NO2_stdev	nitrite concentration standard deviation	micromolar (uM)	NO2
NO3	nitrate concentration	micromolar (uM)	NO3
NO3_stdev	nitrate concentration standard deviation	micromolar (uM)	NO3
Urea	urea concentration	micromolar (uM)	Urea
Urea_stdv	urea concentration standard deviation	micromolar (uM)	Urea

Database

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Dataset: Chesapeake Bay Nutrients 2021