Dataset: Western Pacific Hawaii Aerosol Data

Name: Aerosol composition data of ion concentrations (ammonium, nitrate, nitrite, sodium, chloride, magnesium, calcium, potassium, sulfate); and ammonium and nitrate isotope (15N) of atmospheric particulates collected in Hawaii from March 2021 to August 2022
Published: 2025-02-13
Keywords: atmospheric aerosol, inorganic nitrogen, nitrogen isotope, western North Pacific, Hawaii, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.946741.1

Spatial Extent: N:21.32 E:-157.67 S:21.32 W:-157.67

North Pacific Ocean

Temporal Extent: 2021-03-24 - 2022-06-30

Project:

Collaborative Research: Characterization of Reactive Nitrogen in The North Pacific Atmosphere (North Pacific Atmos)

Principal Investigator:

Meredith Hastings (Brown University)

Co-Principal Investigator:

Hayley N. Schiebel (Suffolk University)

Student:

Alexandra MacFarland (Brown University)

Contact:

Alexandra MacFarland (Brown University)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2025-02-13

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Aerosol composition data of ion concentrations (ammonium, nitrate, nitrite, sodium, chloride, magnesium, calcium, potassium, sulfate); and ammonium and nitrate isotope (15N) of atmospheric particulates collected in Hawaii from March 2021 to August 2022

Abstract:

These data include aerosol composition data of ion concentrations (ammonium, nitrate, nitrite, sodium, chloride, magnesium, calcium, potassium, sulfate), and ammonium isotope (15N) of atmospheric particulates collected on Oahu, Hawaii. Aerosol sampling was conducted from March 2021 to June 2022 and collected roughly every seven days. A high-volume aerosol sampler operating at 1,200 L min-1 with 25 × 20 cm filters was used. Recognizing the deposition of atmospheric particulates has the potential to understanding the important role of atmospheric deposition to the nitrogen cycle and biogeochemistry in the ocean. These data assess the contribution of atmospheric deposition to inorganic nitrogen and were collected by Mitchell Pinkerton at the Ocean University of Hawaii.

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2025-02-13	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.946741.1	2025-02-13

Methods & Sampling

Aerosol sampling was conducted from March 24, 2021 to June 30, 2022. A high-volume aerosol sampler operating at 1,200 L min^-1 with 25 × 20 cm filters was used. Aerosol samples were for seven days for each filter, with a total of 66 samples collected.

We measured for ammonium isotopes (¹⁵N), and a suite of ion concentrations (calcium (Ca²⁺), magnesium (Mg²⁺), sodium (Na⁺), and potassium (K⁺), Chloride (Cl^-) and sulfate (SO₄^2-)). All measurements were conducted at the Department of Earth, Environmental, and Planetary Sciences at Brown University in Providence, RI (USA).

The filter was extracted in a pre-cleaned bottle with ~30 mL of MQ water (exact amounts were recorded via weight) and sonicated for 1 h. After sonication, the solutions were filtered via a vacuum pumped. Samples were frozen then at -20 ◦C until further analyses.

The concentration of ammonium, nitrate, and nitrite were determined colorimetrically (indophenol blue) using a discrete UV–Vis analyzer (Westco Smartchem 200). U.S. EPA Compliant Methods 350.1 (O’Dell, 1993), 353.2 (Revision 2.0), and 354.1 were followed for ammonium, nitrate, and nitrite, respectively. Standard lab protocols were followed, including calibration to standards as well as blanks and in-house quality control measurements.

The azide method (Zhang et al., 2007) was used to complete ammonium (¹⁵N /¹⁴N) isotope analyses on a continuous flow isotope ratio mass spectrometer. Values were reported in ‰ relative to standards (IAEA-N₂ and USGS-25).

Concentrations of calcium, magnesium, sodium, potassium, chloride, and sulfate were measured on an Ion Chromatography (IC) instrument (Dionex Integrion HPIC) using suppressed conductivity detection. Anions were determined using a Dionex AS19-4 μm guard (4 × 50 mm) and analytical column (4× 250 mm) with 20 mM KOH as eluent with a flow rate of 1 mL min^-1. Cations were analyzed using a Dionex CS-16 guard column (5 × 50 mm) analytical column (5 × 250 mm). Eluent of 30 mM methane sulfonic acid was used to detect cations with a pump flow rate of 1 mL min⁻¹. All samples were filtered with 0.20-μm filters before being analyzed. In-house quality control standards were run approximately every six samples.

BCO-DMO Processing

* Adjusted parameter names to comply with database requirements
* Added sampling latitude and longitude to dataset
* Converted date to ISO notation (Y-m-d)

Data Files

File
946741_v1_hawaiiaerosol.csv (Comma Separated Values (.csv), 7.06 KB) MD5:69bc8b8d91c99180c5bf1acb99688ace Primary data file for dataset ID 946741, version 1

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1851318
NSF Division of Ocean Sciences	OCE-1851343

Deployments

None available yet

Instruments

Aerosol Sampler

Supplied Name: High-volume aerosol sampler operating at 1,200 L min-1 with 25 × 20 cm filters.

Supplied Description:

Instrument Type

Generic Name: Aerosol Sampler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/13/

Generic Description:

A device that collects a sample of aerosol (dry particles or liquid droplets) from the atmosphere.

Discrete Analyzer

Supplied Name: Discrete UV–Vis analyzer (Westco Smartchem 200)

Supplied Description:

Discrete UV–Vis analyzer (Westco Smartchem 200): for ammonium, nitrate, and nitrite concentrations.

Instrument Type

Generic Name: Discrete Analyzer

Generic Description:

Discrete analyzers utilize discrete reaction wells to mix and develop the colorimetric reaction, allowing for a wide variety of assays to be performed from one sample. These instruments are ideal for drinking water, wastewater, soil testing, environmental and university or research applications where multiple assays and high throughput are required.

Ion Chromatograph

Supplied Name: Ion Chromatography (IC) (Dionex Integrion HPIC)

Supplied Description:

Ion Chromatography (IC) (Dionex Integrion HPIC): to measure chloride, sulfate, calcium, magnesium, sodium, and potassium concentrations.

Instrument Type

Generic Name: Ion Chromatograph

Generic Description:

Ion chromatography is a form of liquid chromatography that measures concentrations of ionic species by separating them based on their interaction with a resin. Ionic species separate differently depending on species type and size. Ion chromatographs are able to measure concentrations of major anions, such as fluoride, chloride, nitrate, nitrite, and sulfate, as well as major cations such as lithium, sodium, ammonium, potassium, calcium, and magnesium in the parts-per-billion (ppb) range. (from http://serc.carleton.edu/microbelife/research_methods/biogeochemical/ic.html)

Mass Spectrometer

Supplied Name: Continuous Flow Isotope Ratio Mass Spectrometer

Supplied Description:

Continuous Flow Isotope Ratio Mass Spectrometer: for ammonium isotope values.

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample_ID	Sample number id of atmospheric particulate sampled	unitless	sample
Date	The sampling date in ISO format yyyy-mm-dd Format: %Y-%m-%d	unitless	date
Collection_Location	Location name of sampling site: Oahu, Kaena, Kahe, Aloha	units	station
Latitude	Sampling latitude, south is negative	decimal degrees	lat
Longitude	Sampling longitude, west is negative	decimal degrees	lon
CollectionPeriod_Hrs	Length of sampling time in format hh	hours (hrs)	time_inc
TotalAirVolume_m3	Total air volume during the sampling	Liter (L)	sample_volume
ParticleWeight_g	Atmospheric particulates weight of each samples	milligram (mg)	weight
AmmoniumConcentration_ugPerm3	Ammonium concentration	micrograms per cubic meter (µg/m3)	NH4
NitrateConcentration_ugPerm3	Nitrate concentration	micrograms per cubic meter (µg/m3)	NO3
SodiumConcentration_ugPerm3	Sodium concentration	micrograms per cubic meter (µg/m3)	Na
PotassiumConcentration_ugPerm3	Potassium concentration	micrograms per cubic meter (µg/m3)	K
MagnesiumConcentration_ugPerm3	Magnesium concentration	micrograms per cubic meter (µg/m3)	Mg
CalciumConcentration_ugPerm3	Calcium concentration	micrograms per cubic meter (µg/m3)	Ca
ChlorideConcentration_ugPerm3	Chloride concentration	micrograms per cubic meter (µg/m3)	chloride
SulfateConcentration_ugPerm3	Sulfate concenration	micrograms per cubic meter (µg/m3)	SO4
Delta15N_Ammonium	Nitrogen isotope ratio (15N/14N) of atmospheric ammonium (NH4+).	parts per thousand (permil) (‰)	d15N_NH4
Delta15N_Nitrate	Nitrogen isotope ratio (15N/14N) of atmospheric nitrate (NO3).	parts per thousand (permil) (‰)	d15N_NO3

Status message

Database

Contribute Data

Dataset: Western Pacific Hawaii Aerosol Data