Sea Spray Aerosol Chamber Study on Selective Transfer and Enrichment of Free and Combined Amino Acids

2021 ◽  
Author(s):  
Nadja Triesch ◽  
Manuela van Pinxteren ◽  
Matthew Salter ◽  
Christian Stolle ◽  
Ryan Pereira ◽  
...  
Keyword(s):  
Amino Acids ◽  
Sea Spray ◽  
Selective Transfer ◽  
Chamber Study ◽  
Sea Spray Aerosol ◽  
Aerosol Chamber

scholarly journals Linking variations in sea spray aerosol particle hygroscopicity to composition during two microcosm experiments

2016 ◽  
Author(s):  
Sara D. Forestieri ◽  
Gavin C. Cornwell ◽  
Taylor M. Helgestad ◽  
Kathryn A. Moore ◽  
Christopher Lee ◽  
...  
Keyword(s):  
Light Scattering ◽  
Relative Humidity ◽  
Salt Content ◽  
Sea Salt ◽  
Sea Spray ◽  
Hygroscopic Growth ◽  
Phytoplankton Blooms ◽  
Aerosol Composition ◽  
Sea Spray Aerosol ◽  
Indoor And Outdoor

Abstract. The extent to which water uptake influences the light scattering ability of marine sea spray aerosol (SSA) particles depends critically on SSA chemical composition. The organic fraction of SSA can increase during phytoplankton blooms, decreasing the salt content and therefore the hygroscopicity of the particles. In this study, subsaturated hygroscopic growth factors at 85 % relative humidity (GF(85 %)) of SSA particles were quantified during two induced phytoplankton blooms in marine aerosol reference tanks (MARTs). One MART was illuminated with fluorescent lights and the other was illuminated with sunlight, referred to as the "indoor" and "outdoor" MARTs, respectively. GF(85 %) values for SSA particles were derived from measurements of light scattering and particle size distributions, concurrently with online single particle and bulk aerosol composition measurements. During both microcosm experiments, the observed bulk average GF(85 %) values were depressed substantially relative to pure, inorganic sea salt, by 10 to 19 %, with a one (indoor MART) and six (outdoor MART) day lag between GF(85 %) depression and the peak chlorophyll-a concentrations. The fraction of organiccontaining SSA particles generally increased after the peak of the phytoplankton blooms. The GF(85 %) values were inversely correlated with the fraction of particles containing organic or other biological markers. This indicates these particles were less hygroscopic than the particles identified as predominately sea salt containing and demonstrates a clear relationship between SSA particle composition and the sensitivity of light scattering to variations in relative humidity. The implications of these observations to the direct climate effects of SSA particles are discussed.

scholarly journals Gaseous chemistry and aerosol mechanism developments for version 3.5.1 of the online regional model, WRF-Chem

2014 ◽  
Vol 7 (6) ◽  
pp. 2557-2579 ◽  
Author(s):  
S. Archer-Nicholls ◽  
D. Lowe ◽  
S. Utembe ◽  
J. Allan ◽  
R. A. Zaveri ◽  
...  
Keyword(s):  
Gas Phase ◽  
Chemical Mechanism ◽  
Reduced Form ◽  
Sea Spray ◽  
Wind Fields ◽  
Aerosol Composition ◽  
Aerosol Emission ◽  
Sea Spray Aerosol ◽  
The Impact ◽  
Phase Chemical

Abstract. We have made a number of developments to the Weather, Research and Forecasting model coupled with Chemistry (WRF-Chem), with the aim of improving model prediction of trace atmospheric gas-phase chemical and aerosol composition, and of interactions between air quality and weather. A reduced form of the Common Reactive Intermediates gas-phase chemical mechanism (CRIv2-R5) has been added, using the Kinetic Pre-Processor (KPP) interface, to enable more explicit simulation of VOC degradation. N2O5 heterogeneous chemistry has been added to the existing sectional MOSAIC aerosol module, and coupled to both the CRIv2-R5 and existing CBM-Z gas-phase schemes. Modifications have also been made to the sea-spray aerosol emission representation, allowing the inclusion of primary organic material in sea-spray aerosol. We have worked on the European domain, with a particular focus on making the model suitable for the study of nighttime chemistry and oxidation by the nitrate radical in the UK atmosphere. Driven by appropriate emissions, wind fields and chemical boundary conditions, implementation of the different developments are illustrated, using a modified version of WRF-Chem 3.4.1, in order to demonstrate the impact that these changes have in the Northwest European domain. These developments are publicly available in WRF-Chem from version 3.5.1 onwards.

scholarly journals Sea State and Boundary Layer Stability Limit Sea Spray Aerosol Lifetime over the Southern Ocean

2020 ◽  
Author(s):  
Sebastian Landwehr ◽  
Michele Volpi ◽  
Marzieh H Derkani ◽  
Filippo Nelli ◽  
Alberto Alberello ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Southern Ocean ◽  
Stability Limit ◽  
Sea Spray ◽  
Boundary Layer Stability ◽  
Sea State ◽  
Sea Spray Aerosol

Inside versus Outside: Ion Redistribution in Nitric Acid Reacted Sea Spray Aerosol Particles as Determined by Single Particle Analysis

2013 ◽  
Vol 135 (39) ◽  
pp. 14528-14531 ◽  
Author(s):  
Andrew P. Ault ◽  
Timothy L. Guasco ◽  
Olivia S. Ryder ◽  
Jonas Baltrusaitis ◽  
Luis A. Cuadra-Rodriguez ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Single Particle ◽  
Aerosol Particles ◽  
Particle Analysis ◽  
Sea Spray ◽  
Single Particle Analysis ◽  
Sea Spray Aerosol

scholarly journals Production flux of sea spray aerosol

2011 ◽  
Vol 49 (2) ◽  
Author(s):  
Gerrit de Leeuw ◽  
Edgar L Andreas ◽  
Magdalena D. Anguelova ◽  
C. W. Fairall ◽  
Ernie R. Lewis ◽  
...  
Keyword(s):  
Sea Spray ◽  
Sea Spray Aerosol

scholarly journals Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014

2019 ◽  
Vol 19 (2) ◽  
pp. 1027-1039 ◽  
Author(s):  
Victoria E. Irish ◽  
Sarah J. Hanna ◽  
Megan D. Willis ◽  
Swarup China ◽  
Jennie L. Thomas ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Surface Area ◽  
Marine Boundary Layer ◽  
Mineral Dust ◽  
Canadian Arctic ◽  
Particle Dispersion ◽  
Sea Spray ◽  
Dispersion Modelling ◽  
Air Mass ◽  
Sea Spray Aerosol

Abstract. Ice nucleating particles (INPs) in the Arctic can influence climate and precipitation in the region; yet our understanding of the concentrations and sources of INPs in this region remain uncertain. In the following, we (1) measured concentrations of INPs in the immersion mode in the Canadian Arctic marine boundary layer during summer 2014 on board the CCGS Amundsen, (2) determined ratios of surface areas of mineral dust aerosol to sea spray aerosol, and (3) investigated the source region of the INPs using particle dispersion modelling. Average concentrations of INPs at −15, −20, and −25 ∘C were 0.005, 0.044, and 0.154 L−1, respectively. These concentrations fall within the range of INP concentrations measured in other marine environments. For the samples investigated the ratio of mineral dust surface area to sea spray surface area ranged from 0.03 to 0.09. Based on these ratios and the ice active surface site densities of mineral dust and sea spray aerosol determined in previous laboratory studies, our results suggest that mineral dust is a more important contributor to the INP population than sea spray aerosol for the samples analysed. Based on particle dispersion modelling, the highest concentrations of INPs were often associated with lower-latitude source regions such as the Hudson Bay area, eastern Greenland, or north-western continental Canada. On the other hand, the lowest concentrations were often associated with regions further north of the sampling sites and over Baffin Bay. A weak correlation was observed between INP concentrations and the time the air mass spent over bare land, and a weak negative correlation was observed between INP concentrations and the time the air mass spent over ice and open water. These combined results suggest that mineral dust from local sources is an important contributor to the INP population in the Canadian Arctic marine boundary layer during summer 2014.

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