Enrichment of organic nitrogen in primary biological particles during advection over the North Atlantic

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Enrichment of organic nitrogen in primary biological particles during advection over the North Atlantic. / Dall'Osto, Manuel; Santl-Temkiv, Tina; O'Dowd, Colin; Harrison, Roy M.

In: Atmospheric Environment, Vol. 222, 117160, 01.02.2020, p. 1-9.

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@article{5d2de16b26d640a0b62b312e121bf63e,
title = "Enrichment of organic nitrogen in primary biological particles during advection over the North Atlantic",
abstract = "Using a number of datasets from single particle Aerosol Time-Of-Flight Mass Spectrometry (ATOFMS) measurements, we show only a minor presence of Organic Nitrogen (ON) species in Saharan dust particles (aerosol size range 0.2–3 μm) collected at their origin. ON enhancement is not observed on Saharan dust particles after atmospheric transport (48–96 h) either over the Tropical Ocean in the vicinity of Cape Verde, over the North Atlantic Ocean. In the negative ATOFMS mass spectra, signals due to ON species were found weaks in biological particles (rich in potassium and phosphate) in their source area, and signals due to alkylamines in the positive ATOFMS mass spectra were not found. In striking contrast, biological particles travelling within aerosol dust plumes are found to be enriched in ON species - including alkylamines - in North Atlantic Ocean air (Mace Head, Ireland), as seen in both positive and negative ATOFMS mass spectra. Contrary to filter based aerosol techniques which report ON enrichment within Saharan dust, our single particle mass spectrometry data - allowing study of the aerosol mixing state - suggests that the aging biological particles and not the associated transported aging Saharan dust may be a source of ON species. We suggest biogeochemical processes occurring in the atmosphere in which biological particles are responsible for ON production. This may be an important source of nutrients to the ocean via atmospheric deposition.",
keywords = "aerosol aging, ATOFMF, biological particles, organic nitrogen, single particle",
author = "Manuel Dall'Osto and Tina Santl-Temkiv and Colin O'Dowd and Harrison, {Roy M.}",
year = "2020",
month = feb,
day = "1",
doi = "10.1016/j.atmosenv.2019.117160",
language = "English",
volume = "222",
pages = "1--9",
journal = "Atmospheric Environment",
issn = "1352-2310",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Enrichment of organic nitrogen in primary biological particles during advection over the North Atlantic

AU - Dall'Osto, Manuel

AU - Santl-Temkiv, Tina

AU - O'Dowd, Colin

AU - Harrison, Roy M.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - Using a number of datasets from single particle Aerosol Time-Of-Flight Mass Spectrometry (ATOFMS) measurements, we show only a minor presence of Organic Nitrogen (ON) species in Saharan dust particles (aerosol size range 0.2–3 μm) collected at their origin. ON enhancement is not observed on Saharan dust particles after atmospheric transport (48–96 h) either over the Tropical Ocean in the vicinity of Cape Verde, over the North Atlantic Ocean. In the negative ATOFMS mass spectra, signals due to ON species were found weaks in biological particles (rich in potassium and phosphate) in their source area, and signals due to alkylamines in the positive ATOFMS mass spectra were not found. In striking contrast, biological particles travelling within aerosol dust plumes are found to be enriched in ON species - including alkylamines - in North Atlantic Ocean air (Mace Head, Ireland), as seen in both positive and negative ATOFMS mass spectra. Contrary to filter based aerosol techniques which report ON enrichment within Saharan dust, our single particle mass spectrometry data - allowing study of the aerosol mixing state - suggests that the aging biological particles and not the associated transported aging Saharan dust may be a source of ON species. We suggest biogeochemical processes occurring in the atmosphere in which biological particles are responsible for ON production. This may be an important source of nutrients to the ocean via atmospheric deposition.

AB - Using a number of datasets from single particle Aerosol Time-Of-Flight Mass Spectrometry (ATOFMS) measurements, we show only a minor presence of Organic Nitrogen (ON) species in Saharan dust particles (aerosol size range 0.2–3 μm) collected at their origin. ON enhancement is not observed on Saharan dust particles after atmospheric transport (48–96 h) either over the Tropical Ocean in the vicinity of Cape Verde, over the North Atlantic Ocean. In the negative ATOFMS mass spectra, signals due to ON species were found weaks in biological particles (rich in potassium and phosphate) in their source area, and signals due to alkylamines in the positive ATOFMS mass spectra were not found. In striking contrast, biological particles travelling within aerosol dust plumes are found to be enriched in ON species - including alkylamines - in North Atlantic Ocean air (Mace Head, Ireland), as seen in both positive and negative ATOFMS mass spectra. Contrary to filter based aerosol techniques which report ON enrichment within Saharan dust, our single particle mass spectrometry data - allowing study of the aerosol mixing state - suggests that the aging biological particles and not the associated transported aging Saharan dust may be a source of ON species. We suggest biogeochemical processes occurring in the atmosphere in which biological particles are responsible for ON production. This may be an important source of nutrients to the ocean via atmospheric deposition.

KW - aerosol aging

KW - ATOFMF

KW - biological particles

KW - organic nitrogen

KW - single particle

UR - http://www.scopus.com/inward/record.url?scp=85075854251&partnerID=8YFLogxK

U2 - 10.1016/j.atmosenv.2019.117160

DO - 10.1016/j.atmosenv.2019.117160

M3 - Article

AN - SCOPUS:85075854251

VL - 222

SP - 1

EP - 9

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

M1 - 117160

ER -