284 results match your criteria dust long-range


Saharan dust and giant quartz particle transport towards Iceland.

Sci Rep 2021 Jun 4;11(1):11891. Epub 2021 Jun 4.

Soil Conservation Service of Iceland, Hella, Iceland.

Mineral dust emissions from Saharan sources have an impact on the atmospheric environment and sedimentary units in distant regions. Here, we present the first systematic observations of long-range Saharan dust transport towards Iceland. Fifteen Saharan dust episodes were identified to have occurred between 2008 and 2020 based on aerosol optical depth data, backward trajectories and numerical models. Read More

View Article and Full-Text PDF

[Spatio-temporal Patterns and Potential Sources of Absorbing Aerosols in the Fenwei Plain].

Huan Jing Ke Xue 2021 Jun;42(6):2634-2647

College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China.

Air quality has gradually improved in many parts of China; however, air pollution is become more severe in the Fenwei Plain. Using OMI/Aura OMAERUV L2 and PM data, spatial autocorrelation analysis and back trajectory modeling were used to explore the spatio-temporal patterns of absorptive aerosols over the Fenwei Plain, and the dominant types, transmission paths, and potential source areas were identified. The main results can be summarized as follows:① Annual mean absorbing aerosol index (AAI) values increased between 2005 and 2019, with high period occurring in 2006, 2013, and 2017, with values exceeding 0. Read More

View Article and Full-Text PDF

Source identification of atmospheric particle-bound mercury in the Himalayan foothills through non-isotopic and isotope analyses.

Environ Pollut 2021 May 6;286:117317. Epub 2021 May 6.

State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences (CAS), Lanzhou, 730000, China.

This study reports on the sources of atmospheric particle-bound mercury (HgP) in less studied regions of Nepal based on the analysis of stable mercury (Hg) isotopes in aerosol samples from two neighboring areas with high and low anthropogenic emissions (Kathmandu and Dhulikhel, respectively) during 2018. Although the Indian monsoon and westerlies are generally regarded as the primary carriers of pollutants to this region via the heavily industrialized Indo-Gangetic Plain, the concentrations of total suspended particles (TSP) and HgP in Kathmandu were higher than those in Dhulikhel, thus suggesting a substantial contribution from local sources. Both isotopic (δHg and ΔHg) and non-isotopic evidence indicated that dust, waste burning, and industrial byproducts (without Hg amalgamation) were the major sources of Hg in Kathmandu during the study period. Read More

View Article and Full-Text PDF

Sources of PM-bound water soluble ions at EMEP's Auchencorth Moss (UK) supersite revealed by 3D-Concentration Weighted Trajectory (CWT) model.

Chemosphere 2021 Jul 15;274:129979. Epub 2021 Feb 15.

UK Centre for Ecology & Hydrology, Bush Estate, Penicuik, UK.

The Concentration Weighted Trajectory (CWT) model is a well-known tool which combines the residence time (trajectory points) of air masses over specific regions with ambient concentrations of air pollutants, aiming to identify potential long range transport impacts. An upgraded 3D-version of CWT model (3D-CWT), investigating not only the geographical origin of the exogenous emissions but also the altitudinal layers in which the transport occurs, was developed and coupled with PM-bound concentrations of water soluble ions (nss- SO (non-sea salt sulfates), NO, Cl, NH, Na, Mg, Ca and K) for the years 2017-2018, derived by the Auchencorth Moss supersite in Southeast Scotland, United Kingdom (UK). The 3D-CWT model was implemented in two distinct altitudinal layers above ground level (0 m ≤ Layer 1 < 1000 m, 1000 m ≤ Layer 2 < 2000 m), because few trajectory points exceeded the 2000 m limit. Read More

View Article and Full-Text PDF

Dry and wet deposition of microplastics in a semi-arid region (Shiraz, Iran).

Sci Total Environ 2021 Sep 30;786:147358. Epub 2021 Apr 30.

School of Geography, Earth and Environmental Sciences, Plymouth University, PL4 8AA, UK.

Microplastics (MP) have been retrieved from settled dusts and rainfall collected monthly over a period of a year and daily over an additional period of ten days in the city of Shiraz and at an elevated remote site (Mount Derak) in Iran. Total monthly deposition ranged from about 1000 to 3500 MP m at Shiraz and about 200 to 600 MP m at Mount Derak, with greater deposition taking place during the dry months (June to November) than in months when precipitation events occurred. Overall, MP deposition was dominated by dry deposition, with precipitation appearing to washout MP and inhibit local resuspension of material by dampening the ground. Read More

View Article and Full-Text PDF
September 2021

Aerosols optical depth and Ångström exponent over different regions in Garhwal Himalaya, India.

Environ Monit Assess 2021 May 4;193(6):324. Epub 2021 May 4.

Department of Physics, H N B University, Garhwal (A Central University), 246174 Srinagar, Uttarakhand, India.

Aerosol optical depth (AOD) and Ångström exponent (AE) are observed to be important parameters in understanding the status of ambient aerosol concentration over a particular location and depend not only upon the local but also on the large-scale dynamics of the atmosphere. The present article analyses the AOD and AE parameters retrieved with Moderate Resolution Imaging Spectrometer (MODIS) and Multi-angle Imaging Spectro-Radiometer (MISR) instruments onboard satellites, for the upper (Chamoli) and foothill (Dehradun) regions of Garhwal Himalaya in Uttarakhand, India, from 2006 to 2015. Aerosol properties are investigated at monthly, seasonal, and annual scales. Read More

View Article and Full-Text PDF

Calculating source contributions to urban atmospheric polycyclic aromatic hydrocarbons and nitropolycyclic aromatic hydrocarbons using 1-nitropyrene and pyrene: An application to an Asian dust event.

Chemosphere 2021 Apr 27;280:130662. Epub 2021 Apr 27.

Faculty of Life and Environmental Sciences, Shimane University, 1060 Nishikawatsu-machi, Matsue, 690-8504, Japan.

A method to calculate source contributions to atmospheric polycyclic aromatic hydrocarbons (PAHs) and their nitrated congeners (NPAHs) is proposed, using pyrene (Pyr) and 1-nitropyrene (1-NP), as respective representatives of PAHs and NPAHs. This is based on the known increases in NPAH to PAH ratios as combustion temperatures increase. The fractions of 1-NP and Pyr from high temperature combustion sources in total 1-NP and Pyr are respectively calculated as a (0 Read More

View Article and Full-Text PDF

Long-Range UHF RFID Tag for Automotive License Plate.

Sensors (Basel) 2021 Apr 4;21(7). Epub 2021 Apr 4.

Information and Communication Engineering Department, Daegu University, Kyungsan 38453, Korea.

In this paper, various locations of an Ultra High Frequency (UHF) Radio Frequency Identification (RFID) tag on automotive license plates have been considered based on the radiation pattern of the tag antenna. A small, 130 × 50 mm, passive loop antenna type UHF RFID tag for an automotive license plate was simulated with an EM simulation CST program. It was designed to have a larger back-lobe radiation pattern since the front side of the tag faces the back side of the plate holder to protect the tag antenna from bugs and dust when the automobile runs. Read More

View Article and Full-Text PDF

Tracing local sources and long-range transport of PM in central Taiwan by using chemical characteristics and Pb isotope ratios.

Sci Rep 2021 Apr 7;11(1):7593. Epub 2021 Apr 7.

Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan.

Central Taiwan is among the most heavily polluted regions in Taiwan because of a complex mixing of local emissions from intense anthropogenic activities with natural dust. Long-range transport (LRT) of pollutants from outside Taiwan also contributes critically to the deterioration of air quality, especially during the northeast monsoon season. To identify the sources of particulate matter < 10 μm (PM) in central Taiwan, this study performed several sampling campaigns, including three local events, one LRT event, and one dust storm event, during the northeast monsoon season of 2018/2019. Read More

View Article and Full-Text PDF

The Microbiome of Size-Fractionated Airborne Particles from the Sahara Region.

Environ Sci Technol 2021 02 21;55(3):1487-1496. Epub 2021 Jan 21.

Harvard John A. Paulson School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, United States.

Diverse airborne microbes affect human health and biodiversity, and the Sahara region of West Africa is a globally important source region for atmospheric dust. We collected size-fractionated (>10, 10-2.5, 2. Read More

View Article and Full-Text PDF
February 2021

Chemical Characteristics of Atmospheric PM and PM at a Rural Site of Lijiang City, China.

Int J Environ Res Public Health 2020 12 20;17(24). Epub 2020 Dec 20.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

Emissions from biomass burning are very serious in Southeast Asia and South Asia in April. In order to explore the effect of long-range transport of biomass emissions from the Indochina Peninsula in Southwest China during the period of the southeast monsoon season and to find out the main pollution sources in local atmospheric PM, a field campaign was conducted from 6-26 April 2011 in Lijiang, China. Twenty-four-hour PM and PM filter samples were collected, and inorganic ions, elements, and carbonaceous components (including organic carbon (OC) and elemental carbon (EC), polycyclic aromatic hydrocarbons (PAHs) and nitrated PAHs (NPAHs)) were measured. Read More

View Article and Full-Text PDF
December 2020

Human Health Risk Assessment by Dietary Intake and Spatial Distribution Pattern of Polybrominated Diphenyl Ethers and Dechloran Plus from Selected Cities of Pakistan.

Int J Environ Res Public Health 2020 12 20;17(24). Epub 2020 Dec 20.

Institute of Chemical, Environmental and Bio Science Engineering, TU Wien, 1060 Vienna, Austria.

A class of intractable bio accumulative halogenated compounds polybrominated diphenyl ethers (PBDEs) was studied. Specifically, PBDEs and dechloran plus (DP) contamination in wheat and the assaulted environment-agricultural soil and dust-from metropolitan cities of Pakistan was the focus. The exposure of brominated flame retardants (BFRs) to humans, their probable toxicological impact on health, source apportionment, and the spatial tendency of BFRs were studied. Read More

View Article and Full-Text PDF
December 2020

Exploring the Constraints on Simulated Aerosol Sources and Transport Across the North Atlantic With Island-Based Sun Photometers.

Earth Space Sci 2020 Nov 16;7(11):e2020EA001392. Epub 2020 Nov 16.

Department of Civil and Environmental Engineering Massachusetts Institute of Technology Cambridge MA USA.

Atmospheric aerosol over the North Atlantic Ocean impacts regional clouds and climate. In this work, we use a set of sun photometer observations of aerosol optical depth (AOD) located on the Graciosa and Cape Verde islands, along with the GEOS-Chem chemical transport model to investigate the sources of these aerosol and their transport over the North Atlantic Ocean. At both locations, the largest simulated contributor to aerosol extinction is the local source of sea-salt aerosol. Read More

View Article and Full-Text PDF
November 2020

Ambient viral and bacterial distribution during long-range transport in Northern Taiwan.

Environ Pollut 2021 Feb 11;270:116231. Epub 2020 Dec 11.

Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Electronic address:

Long-range transport (LRT) reportedly carries air pollutants and microorganisms to downwind areas. LRT can be of various types, such as dust storm (DS) and frontal pollution (FP); however, studies comparing their effects on bioaerosols are lacking. This study evaluated the effect of LRT on viral and bacterial concentrations in Northern Taiwan. Read More

View Article and Full-Text PDF
February 2021

Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations.

J Atmos Sol Terr Phys 2021 Jan 9;212:105491. Epub 2020 Dec 9.

Aerosol & Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur, 515 003, Andhra Pradesh, India.

The World Health Organization (WHO) declared the coronavirus disease of 2019 (COVID-19) as a pandemic due to its widespread global infection. This has resulted in lockdown under different phases in many nations, including India, around the globe. In the present study, we report the impact of aerosols on surface ozone in the context of pre-lockdown (01 - 24th March 2020 (PLD)), lockdown phase1 (25th March to 14th April 2020 (LDP1)), and lockdown phase 2 (15th April to 03 May 2020 (LDP2)) on clear days at a semi-arid site, Anantapur in southern India using both in situ observations and model simulations. Read More

View Article and Full-Text PDF
January 2021

Monitoring atmospheric particulate matters using vertically resolved measurements of a polarization lidar, in-situ recordings and satellite data over Tehran, Iran.

Sci Rep 2020 11 18;10(1):20052. Epub 2020 Nov 18.

Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, 4513766731, Iran.

The highly polluted atmosphere above Tehran has been investigated by using a polarization lidar operating at 532 nm, in-situ particulate matter suites distributed over the city, and meteorological observations. The measurement campaign is conducted from Nov. 2014 to Jan. Read More

View Article and Full-Text PDF
November 2020

Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003-2017.

Atmos Chem Phys 2020 Jan 3;20(1):139-161. Epub 2020 Jan 3.

Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA.

Emissions and long-range transport of mineral dust and combustion-related aerosol from burning fossil fuels and biomass vary from year to year, driven by the evolution of the economy and changes in meteorological conditions and environmental regulations. This study offers both satellite and model perspectives on the interannual variability and possible trends of combustion aerosol and dust in major continental outflow regions over the past 15 years (2003-2017). The decade-long record of aerosol optical depth (AOD, denoted as ), separately for combustion aerosol () and dust (), over global oceans is derived from the Collection 6 aerosol products of the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard both Terra and Aqua. Read More

View Article and Full-Text PDF
January 2020

Sources, frequency, and chemical nature of dust events impacting the United States East Coast.

Atmos Environ (1994) 2020 Jun 5;231. Epub 2020 Apr 5.

Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA.

This study examines 14 years (2004-2017) of surface aerosol composition data from the EPA IMPROVE network with a focus on the monthly profile, sources, and chemical nature of extreme dust events (>92nd percentile of fine soil concentration each month) impacting ten sites along the United States East Coast ranging in latitude from Florida to Maine. Based on trajectory, remote sensing, and reanalysis data, dust events were categorized into four source categories: African, Asian, Mix (African + Asian), and Other (anything other than African and Asian). The results reveal that extreme dust events account for between 3. Read More

View Article and Full-Text PDF

Comparative Analysis of PM-Bound Polycyclic Aromatic Hydrocarbons (PAHs), Nitro-PAHs (NPAHs), and Water-Soluble Inorganic Ions (WSIIs) at Two Background Sites in Japan.

Int J Environ Res Public Health 2020 11 6;17(21). Epub 2020 Nov 6.

Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.

Daily PM (particulate matter with aerodynamic diameter ≤2.5 μm) samples were simultaneously collected at two background sites (Wajima Air Monitoring Station (WAMS) and Fukue-Jima Atmosphere and Aerosol Monitoring Station (FAMS)) in Japan in the East Asian winter and summer monsoon periods of 2017 and 2019, to compare the characteristics of air pollutants among different regions and to determine the possible variation during the long-range transport process. Polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs (NPAHs), and water-soluble inorganic ions (WSIIs) were analyzed. Read More

View Article and Full-Text PDF
November 2020

Characterization of long-range transported bioaerosols in the Central Mediterranean.

Sci Total Environ 2021 Apr 19;763:143010. Epub 2020 Oct 19.

Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy; CNR-ISP, Institute of Polar Science, National Research Council, Via Gobetti 101, Bologna, Italy. Electronic address:

Airborne bacteria were characterized over a 2-y period via high-throughput massive sequencing of 16S rRNA gene in aerosol samples collected at a background mountain European Monitoring and Evaluation Programme (EMEP) Network site (Monte Martano, Italy) located in the Central Mediterranean area. The air mass origin of nineteen samples was identified by air mass modelling and a detailed chemical analysis was performed. Four main origins (Saharan, North-western, North-eastern, and Regional) were identified, and distinct microbial communities were associated with these air masses. Read More

View Article and Full-Text PDF

Advances in sunphotometer-measured aerosol optical properties and related topics in China: Impetus and perspectives.

Atmos Res 2021 Feb 26;249:105286. Epub 2020 Sep 26.

Biospheric Sciences Branch, Code 923, NASA/Goddard Space Flight Center, Greenbelt, MD, USA.

Aerosol is a critical trace component of the atmosphere. Many processes in the Earth's climate system are intimately related to aerosols via their direct and indirect radiative effects. Aerosol effects are not limited to these climatic aspects, however. Read More

View Article and Full-Text PDF
February 2021

Long-term variability of inorganic ions in TSP at a remote background site in Japan (Wajima) from 2005 to 2015.

Chemosphere 2021 Feb 25;264(Pt 1):128427. Epub 2020 Sep 25.

Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-1192, Japan; Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, 920-1192, Japan. Electronic address:

Eleven years (2005-2015) of data from long-term monitoring at a Japanese remote background site in Wajima, were analyzed to investigate temporal trends and sources. Water-soluble inorganic ions (WSIIs) were analyzed for aerosol chemical composition. The total WSIIs concentration was 7. Read More

View Article and Full-Text PDF
February 2021

Population exposure to particulate-matter and related mortality due to the Portuguese wildfires in October 2017 driven by storm Ophelia.

Environ Int 2020 11 28;144:106056. Epub 2020 Aug 28.

EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas 135, 4050-600 Porto, Portugal; Department of Environmental Health, Portuguese National Institute of Health, Rua Alexandre Herculano, 321, 4000-055 Porto, Portugal.

In October 2017, hundreds of wildfires ravaged the forests of the north and centre of Portugal. The fires were fanned by strong winds as tropical storm Ophelia swept the Iberian coast, dragging up smoke (together with Saharan dust from north-western Africa) into higher western European latitudes. Here we analyse the long-range transport of particulate matter (PM) and study associations between PM and short-term mortality in the Portuguese population exposed to PM due to the October 2017 wildfires, the worst fire sequence in the country over the last decades. Read More

View Article and Full-Text PDF
November 2020

Chemistry of dry and wet atmospheric deposition over the Balearic Islands, NW Mediterranean: Source apportionment and African dust areas.

Sci Total Environ 2020 Dec 24;747:141187. Epub 2020 Jul 24.

ARAID-Instituto Pirenaico de Ecología - CSIC, Zaragoza 50059, Spain.

Wet and dry aerosol deposition samples were collected from September 2010 to August 2012 at a remote background site in the Mallorca Isle (Western Mediterranean). Ions and major and trace elements were determined in soluble and insoluble fractions. Temporal variations of chemical components are discussed and interpreted. Read More

View Article and Full-Text PDF
December 2020

Atmospheric residence times and excess of unsupported Po in aerosol samples from the Kuwait bay-northern gulf.

Chemosphere 2020 Dec 16;261:127690. Epub 2020 Jul 16.

Environmental and Life Sciences Research Center, Kuwait Institute for Scientific Research, P. O. Box 24885, Safat, 13109, Kuwait.

The concentration of cosmogenic radionuclide Be and the naturally occurring radionuclide Rn and its progenies Pb, Po, and Pb were measured in the ground surface air in the urban area of the northern Arabian Gulf close to Kuwait Bay. A high-volume air sampler connected with a five-stage cascade impactor was used to collect approximately 1800 cubic meter weekly for a period of one year. The concentrations of Pb and Po varied from 0. Read More

View Article and Full-Text PDF
December 2020

Evaluating the size distribution characteristics and sources of atmospheric trace elements at two mountain sites: comparison of the clean and polluted regions in China.

Environ Sci Pollut Res Int 2020 Dec 27;27(34):42713-42726. Epub 2020 Jul 27.

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100191, China.

Size-resolved trace metal concentrations at two background sites were assessed during a 1-year observation campaign, with the measurements performed in parallel at two mountain sites, where Mt. Dinghu (DHS) located in the rural region of Pearl River Delta (PRD) and Mt. Gongga (GGS) located in the Tibetan Plateau region. Read More

View Article and Full-Text PDF
December 2020

Characterization of PM sources in a Belgrade suburban area: a multi-scale receptor-oriented approach.

Environ Sci Pollut Res Int 2020 Nov 21;27(33):41717-41730. Epub 2020 Jul 21.

Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia.

Designated as the most harmful for health, PM aerosol fraction was a subject of our study. It was collected for all four seasons during 2014/15 in the suburban area of Belgrade (Serbia) and analysed for Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Br, As, Ba and Pb elements and for NH, NO and SO ions by particle-induced X-ray emission and ion chromatography techniques, respectively. Obtained concentrations have been treated by a combination of several receptor-oriented models to reveal source contributions to the suburban PM at different spatial scales. Read More

View Article and Full-Text PDF
November 2020

Metallic elements and Pb isotopes in PM in three Chinese typical megacities: spatial distribution and source apportionment.

Environ Sci Process Impacts 2020 Aug 16;22(8):1718-1730. Epub 2020 Jul 16.

Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China.

Heavy metal pollution in fine particulate matter (PM) is a serious environmental and health concern in China, particularly during winter. Here, we detected 40 elements in 24 h integrated daily PM samples collected in January 2014 from three typical Chinese metropolises (Beijing, Changchun, and Chengdu) to reflect elemental spatial variations, local sources, and regional transport. The measured elemental concentrations in Changchun were 11. Read More

View Article and Full-Text PDF

Estimates of African Dust Deposition Along the Trans-Atlantic Transit Using the Decade-long Record of Aerosol Measurements from CALIOP, MODIS, MISR, and IASI.

J Geophys Res Atmos 2019 Jul 12;124(14):7975-7996. Epub 2019 Jul 12.

Laboratoire deMeteorologie Dynamique, Palaiseau, France.

Deposition of mineral dust into ocean fertilizes ecosystems and influences biogeochemical cycles and climate. In-situ observations of dust deposition are scarce, and model simulations depend on the highly parameterized representations of dust processes with few constraints. By taking advantage of satellites' routine sampling on global and decadal scales, we estimate African dust deposition flux and loss frequency (LF, a ratio of deposition flux to mass loading) along the trans-Atlantic transit using the three-dimensional distributions of aerosol retrieved by spaceborne lidar (CALIOP) and radiometers (MODIS, MISR, and IASI). Read More

View Article and Full-Text PDF

Chemical characteristics of rainwater in the tropical rainforest region in northwestern Borneo.

Environ Sci Pollut Res Int 2020 Oct 23;27(29):36994-37010. Epub 2020 Jun 23.

Department of Applied Geology, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia.

A comprehensive study of the chemical composition of rainwater was carried out from October 2016 to September 2017 in the equatorial tropical rainforest region of northwestern Borneo. Monthly cumulative rainwater samples were collected from different locations in the Limbang River Basin (LRB) and were later categorized into seasonal samples representing northeast monsoon (NEM), southwest monsoon (SWM), and inter-monsoon (IM) periods. Physical parameters (pH, EC, TDS, DO, and turbidity), major ions (HCO, Cl, Ca, Mg, Na, and K) and trace metals (Co, Ni, Cd, Fe, Mn, Pb, Zn, and Cu) were analyzed from collected rainwater samples. Read More

View Article and Full-Text PDF
October 2020