Dataset: Delaware estuary nutrients
Deployment: HRS121112DK

Nutrients, chlorophyll-a, and light attenuation from the Delaware estuary, Aug. and Nov. 2011-2013

Principal Investigator:

David J. Kieber (State University of New York College of Environmental Science and Forestry, SUNY ESF)

David L. Kirchman (University of Delaware)

Contact:

David L. Kirchman (University of Delaware)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Activity and abundance of photoheterotrophs fueled by photochemically-produced substrates (PAPI: Photochemistry and Photoheterotroph Interactions)

Current State:

Final no updates expected

Version:

2015-03-10

Deployment Synonyms:

PAPI-4

Version Date:

2015-03-10

Data URL:

https://www.bco-dmo.org/dataset-deployment/551262/data

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Description

Nutrients, chlorophyll-a, and light attenuation in the Delaware estuary from the R/V Hugh R. Sharp HRS110805DK, HRS111107DK, HRS120809DK, HRS121112DK, HRS1313, HRS1324 in 2011 - 2013 (PAPI: Photochemistry and Photoheterotroph Interactions project)

Methods & Sampling

Dataset acquisition description

Nutrient concentrations were measured by standard wet chemical methods using a SEAL Analytical AA3 Continuous Segmented Flow Analyzer.

Samples for chlorophyll a concentrations were collected by filtering 100 ml of estuarine water through Whatman GF/F filters and stored at -20 oC until analysis. To estimate concentrations, the filters were placed into 90% acetone and 40% dimethyl sulfoxide (DMSO) and then the fluorescence in the extract was measured with a Turner Designs 10-AU fluorometer.

The attenuation coefficient was estimated by measuring photosynthetically active radiance with a Biospherical PNF-210 radiometer over a depth profile. In nearly all cases, the downcast and upcast profiles of radiance were indistinguishable and all data were used. When differences between the down and upcasts were apparent, only the downcast data were used.

Data Processing Description

Dataset Processing Description

Except for converting raw spectrometric or fluorometric readings to concentrations, the concentration data were not processed.

Radiance values at very shallow or very deep depths were excluded from the analysis to calculate the attenuation coefficient when these values were clearly not along the ln(radiance) vs. depth line.

BCO-DMO Processing:

- added conventional header with dataset name, PI name, version date, reference information
- renamed parameters to BCO-DMO standard
- reformated date from m/d/yyyy to yyyy-mm-dd
- replaced blank cells with nd; changed NA and ND to nd
- replaced blanks and / with underscores
- changed format of latititude and longitude to decimal degrees
- matched cruise names to R2R standard names
- revised 3 lat/lon positions - new version (2015-03-11) replaces 2015-01-19
- revised 2 lat positions - new version (2020-10-01)

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1029569	NSF Division of Ocean Sciences
OCE-1030306	NSF Division of Ocean Sciences

Instruments

Fluorometer

Supplied Description:

Turner Designs 10-AU fluorometer

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Nutrient Autoanalyzer

Supplied Name:

Supplied Description:

SEAL Analytical AA3 Continuous Segmented Flow Analyzer

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identification	unitless	cruise_id
cruise_name	project assigned cruise name	unitless	cruise_name
date	local sampling date	yyyy-mm-dd	date
time_local	local time	HH:MM	time_local
lat	latitude; north is positive	decimal degrees	lat
lon	longitiude; east is positive	decimal degrees	lon
station	station	unitless	station
cast	cast number	unitless	cast
light_atten	light attenuation	per meter	beam_c
atten_err	light attenuation error; calculated by linear regression analysis of ln(irradiance) vs. depth	per meter	beam_c
chl_a	chlorophyll-a concentration	microgram/liter	chl_a
chl_a_sd	chlorophyll-a concentration standard deviation	microgram/liter	std_dev
NO3	nitrate concentration	micromoles/liter	NO3
NO3_sd	nitrate concentration standard deviation	micromoles/liter	std_dev
NH4	ammonium concentration	micromoles/liter	NH4
NH4_sd	ammonium concentration standard deviation	micromoles/liter	std_dev
PO4	phosphate concentration	micromoles/liter	PO4
PO4_sd	phosphate concentration standard deviation	micromoles/liter	std_dev
SiO4	silicate concentration	micromoles/liter	SiO4
SiO4_sd	silicate concentration standard deviation	micromoles/liter	std_dev
comment	sampling comments	unitless	comment

Database

Contribute Data

Dataset: Delaware estuary nutrients
Deployment: HRS121112DK

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Delaware estuary nutrientsDeployment: HRS121112DK

Dataset acquisition description

Dataset Processing Description

Dataset: Delaware estuary nutrients
Deployment: HRS121112DK