Dataset: HOE-DYLAN cruises - NH4

Name: Ammonium (NH4) concentrations from multiple HOE-DYLAN cruises from July to September 2012 (C-MORE project)
Published: 2013-10-04
Keywords: oceans

Cite This Dataset

Project:

Center for Microbial Oceanography: Research and Education (C-MORE)

Principal Investigator:

David M. Karl (University of Hawaii at Manoa, SOEST)

Contact:

Mariona Segura-Noguera (University of Hawaii at Manoa, SOEST)

Data Manager:

Jasmine Nahorniak (Oregon State University, OSU-CEOAS)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

04 October 2013

Version Date:

2013-10-04

Restricted:

Yes

Validated:

Data URL:

https://www.bco-dmo.org/dataset/4053/data

Ammonium (NH4) concentrations from multiple HOE-DYLAN cruises from July to September 2012 (C-MORE project)

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Description

Ammonium data from core casts, isopycnal casts, and beach casts for the HOE-DYLAN cruises.

In the summer of 2012, C-MORE conducted a "continuous" long-term field experiment at Station ALOHA to observe and interpret temporal variability in microbial processes, and the consequences for ecological dynamics and biogeochemical cycling. Special focus was given to time-space coupling because proper scale sampling of the marine environment is an imperative, but generally neglected aspect of marine microbiology.

Hawaii Ocean Experiment - Dynamics of Light and Nutrients (HOE-DYLAN)

These data are restricted to C-MORE members only. Please contact Mariona Segura-Noguera if you would like to use these data (mariona.segura@gmail.com)

Acquisition Description

These low level nutrient measurements were made with an LWCC (not the usual autoanalyzer). The methods were developed by Susan Curless and Mariona Segura-Noguera.

More Information about this dataset

Funding Sources

Funding Source	Award Number
National Science Foundation	DBI-0424599

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KM1215	HOE-DYLAN V	2012-07-08	R/V Kilo Moana	Samuel Wilson (Chief Scientist)	data info
KM1216	HOE-DYLAN VI HOT-244	2012-07-30	R/V Kilo Moana	Fernando Santiago-Mandujano (Chief Scientist)	data info
KM1217	HOE-DYLAN VII	2012-08-05	R/V Kilo Moana	Sonya T. Dyhrman (Chief Scientist)	data info
KM1218	HOE-DYLAN VIII HOT-245	2012-08-16	R/V Kilo Moana	Susan E. Curless (Chief Scientist)	data info
KM1219	HOE-DYLAN IX	2012-08-22	R/V Kilo Moana	Samuel Wilson (Chief Scientist)	data info
KM1220	HOE-DYLAN X HOT-246	2012-09-13	R/V Kilo Moana	Fernando Santiago-Mandujano (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

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

Fluorometer

Supplied Description:

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.

Liquid Waveguide Capillary Cells

Supplied Description:

These low level nutrient measurements were made with an LWCC (not the usual autoanalyzer). The methods were developed by Susan Curless and Mariona Segura-Noguera.

Instrument Type

Generic Name: Liquid Waveguide Capillary Cells

Acronym: LWCC

Generic Description:

Liquid Waveguide Capillary Cells (LWCC) are optical sample cells that combine an increased optical pathlength (2-500 cm) with small sample volumes. They can be connected via optical fibers to a spectrophotometer with fiber optic capabilities. Similar to optical fibers, light is confined within the (liquid) core of an LWCC by total internal reflection at the core/wall interface. Ultra-sensitive absorbance measurements can be performed in the ultraviolet (UV), visible (VIS) and near-infrared (NIR) to detect low sample concentrations in a laboratory or process control environment. According to Beer’s Law the absorbance signal is proportional to chemical concentration and light path length.

Niskin bottle

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.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise ID	text	cruise_id
date	date	YYYYMMDD	date
time	time of day (GMT)	HHMM	time
sta	station number	dimensionless	sta
cast	cast number	dimensionless	cast
bot	rosette bottle number	dimensionless	bot
lat	Station Latitude; South is negative	decimal degrees	lat
lon	Station Longitude; West is negative	decimal degrees	lon
press	pressure from CTD	dbar	press
temp	temperature from CTD	degrees Celsius	temp
sal	salinity from CTD	PSS-78	sal
O2	dissolved oxygen from CTD	micromoles/kilogram	O2
fluor_re	rescaled fluorescence from CTD to estimate chlorophyll	micrograms/liter	fluor_re
NH4	ammonium	nanomoles/liter	NH4
NH4_sd	standard deviation of NH4	nanomoles/liter	NH4

Database

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Dataset: HOE-DYLAN cruises - NH4