A5016241773- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Indoor Air Quality and Microbial Exposure
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Smart Materials for Construction
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Nuclear and radioactivity studies
- Plant responses to elevated CO2
- Astro and Planetary Science
- Vehicle emissions and performance
- Climate change and permafrost
- COVID-19 epidemiological studies
- Toxic Organic Pollutants Impact
- Marine and environmental studies
- Climate Change and Health Impacts
- Zoonotic diseases and public health
- Astrophysics and Star Formation Studies
- Geological Studies and Exploration
- Odor and Emission Control Technologies
Chubu University
2017-2025
Nagoya University
2024-2025
University of Wollongong
2024
The University of Melbourne
2024
Australian Nuclear Science and Technology Organisation
2024
Commonwealth Scientific and Industrial Research Organisation
2024
Hokkaido University
2013-2023
Abstract. Biomass burning (BB) largely modifies the chemical composition of atmospheric aerosols on globe. We collected aerosol samples (TSP) at Cape Hedo, subtropical Okinawa Island, from October 2009 to February 2012 study anhydrosugars as BB tracers. Levoglucosan was detected dominant anhydrosugar followed by its isomers, mannosan and galactosan. found a clear seasonal trend levoglucosan with winter maxima summer minima. Positive correlation between nss-K+ (r = 0.38, p < 0.001); latter...
Abstract. Ambient aerosol samples (TSP, n = 50) were collected for 12 months at subtropical Okinawa Island, Japan, an outflow region of Asian dusts in the western North Pacific and analysed organic carbon (OC), elemental (EC), water-soluble (WSOC), total nitrogen (WSTN), (WSON) major ions to better understand formation transformation East aerosols during long-range atmospheric transport. Concentration ranges these components are; OC: 0.76–7.1 μg m−3 (av. 1.7 ± 1.0 m−3), EC: 0.07–0.96 (0.28...
Incomplete understanding of the sources secondary organic aerosol (SOA) leads to large uncertainty in both air quality management and climate change assessment. Chemical reactions occurring atmospheric aqueous phase represent an important source SOA mass, yet, effects anthropogenic emissions on (aqSOA) are not well constrained. Here we use compound-specific dual-carbon isotopic fingerprints (δ13C Δ14C) dominant aqSOA molecules, such as oxalic acid, track precursor formation mechanisms aqSOA....
Abstract Primary biological aerosol particles (PBAPs) play an important role in affecting atmospheric physical and chemical properties. Aerosol samples were collected at Cape Hedo, Okinawa Island, Japan, from October 2009 to February 2012 analyzed for five primary saccharides four sugar alcohols as PBAP tracers. We detected high levels of sucrose spring when blossoming plants happens prolifically emits pollen the air. Concentrations glucose, fructose, trehalose showed higher than other 2010....
Abstract. Size-segregated aerosols (nine stages from < 0.43 to > 11.3 µm in diameter) were collected at Cape Hedo, Okinawa, spring 2008 and analyzed for water-soluble diacids (C2–C12), ω-oxoacids (ωC2–ωC9), pyruvic acid, benzoic α-dicarbonyls (C2–C3) as well organic carbon (WSOC), (OC), major ions (Na+, NH4+, K+, Mg2+, Ca2+, Cl−, NO3−, SO42−, MSA−). In all the size-segregated aerosols, oxalic acid (C2) was found be most abundant species, followed by malonic succinic acids, whereas...
Life most likely started during the Hadean Eon; however, environmental conditions which contributed to complexity of its chemistry are poorly known. A better understanding various conditions, including global (heliospheric) and local (atmospheric, surface, oceanic), along with internal dynamic early Earth, required understand onset abiogenesis. Herein, we examine contributions galactic cosmic rays (GCRs) solar energetic particles (SEPs) associated superflares from young Sun formation amino...
Abstract. The carbon cycle in the Arctic atmosphere is important understanding abrupt climate changes occurring this region. Two-years of measurements (summer 2016–spring 2018) carbonaceous aerosols at High station Alert, Canada, showed that addition to organic (OC) and elemental (EC), carbonate (CC) was episodically but not negligibly present. relative abundances CC total (TC) ranged from 0–65 % with an average approximately 11 over entire period. Also there a strong correlation aerosol...
Abstract Biomass burning (BB) and biogenic emissions significantly influence the chemical compositions of organic aerosols (OAs). In this study, aerosol samples collected throughout year from a regional receptor site in Pearl River Delta (PRD) were analyzed for BB tracers, primary biological particle (PBAP) secondary tracers. The concentrations highest November to January, was mainly attributed domestic biomass southern China. Southeast Asia affected PRD through long‐range transport between...
Abstract. A study of the stable carbon isotope ratios (δ13C) total (TC) and nitrogen (δ15N) (TN) was carried out for fine aerosol particles (PM1) undertaken every 2 days with a 24 h sampling period at rural background site in Košetice (Central Europe) from 27 September 2013 to 9 August 2014 (n=146). We found seasonal pattern both δ13C δ15N. The variation δ15N characterized by lower values (average 13.1±4.5 ‰) winter higher (25.0±1.6 summer. Autumn spring were transition periods when isotopic...
Abstract To explore the latitudinal distributions, sources and formation mechanisms of total carbon (TC), nitrogen (TN), sulfur (TS) water‐soluble major ions (Na + , Cl − SO 4 2− K nss‐SO NH NO 3 MSA ), marine aerosol samples were collected over Western Pacific (WP) Southern Ocean (SO) from November 1994 to February 1995. Concentrations TC ranged 30–390 ng m −3 (av. 190 ) SO, which are six times lower than those (1,200 WP, whereas concentrations TN 83 in three 232 WP. The highest observed...
Environmental context Water-soluble dicarboxylic acids and related compounds are ubiquitous in atmospheric aerosols. They abundantly emitted from Asian countries transported to the Pacific Ocean. During long-range transport, photochemical processing modifies organic We conducted a 1-year observation of diacids at Okinawa Island, an outflow region Continent, clarify their sources aging. Abstract Ambient aerosol samples were collected for 1 year Japan, analysed water-soluble acids, oxoacids,...
PM2.5 (particulate matter with an aerodynamic diameter <2.5 μm) samples were collected in Huangshi, central China, from March 2012 to February 2013 and analyzed for dicarboxylic acids (diacids) related compounds (DARCs). Oxalic acid (C2; 416 ng m-3) was the most abundant species, followed by phthalic (Ph; 122 m-3), terephthalic (tPh; 116 succinic (C4; 70.4 azelaic (C9; 67.9 adipic (C6; 57.8 acids. Relatively high abundances of Ph tPh differed distribution urban marine aerosols, indicating...
Abstract. To better understand the distributions and sources of low-molecular-weight (LMW) monocarboxylic acids (monoacids) in forest atmosphere, we conducted simultaneous collection gaseous particulate samples at a deciduous broadleaf site northern Japan. LMW normal (C1–C10), branched (iC4–iC6), hydroxyl (glycolic lactic) aromatic (benzoic) monoacids were detected gas particle phases. The dominant phase formic (mean: 953 ng m−3) acetic (528 followed by propionic (37 or isopentanoic (42...
Abstract Biomass burning (BB) affects air quality, the global cycling of carbon, climate, and human health. Intensive BB activities occur throughout year due to wildfires domestic wood in Fairbanks. We collected total suspended particle samples from Fairbanks June 2008 2009. Here, we report seasonal variations molecular composition organic aerosols its contributions Levoglucosan is dominant tracer (annual mean 67 ± 77 ng m −3 ), showing a winter maximum (145 47 ) spring minimum (12 12 )....