8 results match your criteria Atmosphere[Journal]

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The Global Precipitation Climatology Project (GPCP) Monthly Analysis (New Version 2.3) and a Review of 2017 Global Precipitation.

Atmosphere (Basel) 2018 7;9(4). Epub 2018 Apr 7.

Yonsei University, Seoul, South Korea.

The new Version 2.3 of the GPCP Monthly analysis is described in terms of changes made to improve the homogeneity of the product, especially after 2002. These changes include corrections to cross calibration of satellite data inputs and updates to the gauge analysis. Read More

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http://dx.doi.org/10.3390/atmos9040138DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6043897PMC
April 2018
1 Read

Interpreting Mobile and Handheld Air Sensor Readings in Relation to Air Quality Standards and Health Effect Reference Values: Tackling the Challenges.

Atmosphere (Basel) 2017 21;8(10):182. Epub 2017 Sep 21.

Environmental Protection Agency, Research Triangle Park, NC 27711, USA.

The US Environmental Protection Agency (EPA) and other federal agencies face a number of challenges in interpreting and reconciling short-duration (seconds to minutes) readings from mobile and handheld air sensors with the longer duration averages (hours to days) associated with the National Ambient Air Quality Standards (NAAQS) for the criteria pollutants-particulate matter (PM), ozone, carbon monoxide, lead, nitrogen oxides, and sulfur oxides. Similar issues are equally relevant to the hazardous air pollutants (HAPs) where chemical-specific health effect reference values are the best indicators of exposure limits; values which are often based on a lifetime of continuous exposure. A multi-agency, staff-level Air Sensors Health Group (ASHG) was convened in 2013. Read More

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http://dx.doi.org/10.3390/atmos8100182DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5662140PMC
September 2017
42 Reads
1 Citation
1.050 Impact Factor

Comparison of Five Modeling Approaches to Quantify and Estimate the Effect of Clouds on the Radiation Amplification Factor (RAF) for Solar Ultraviolet Radiation.

Authors:
Eric S Hall

Atmosphere (Basel) 2017 ;8(8):153

National Exposure Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Mail Drop E205-03, 109 T. W. Alexander Drive, Research Triangle Park, NC 27711, USA.

A generally accepted value for the Radiation Amplification Factor (RAF), with respect to the erythemal action spectrum for sunburn of human skin, is -1.1, indicating that a 1.0% increase in stratospheric ozone leads to a 1. Read More

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http://dx.doi.org/10.3390/atmos8080153DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6260946PMC
January 2017

Frequency and Character of Extreme Aerosol Events in the Southwestern United States: A Case Study Analysis in Arizona.

Atmosphere (Basel) 2016 Jan 23;7(1). Epub 2015 Dec 23.

Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, USA.

This study uses more than a decade's worth of data across Arizona to characterize the spatiotemporal distribution, frequency, and source of extreme aerosol events, defined as when the concentration of a species on a particular day exceeds that of the average plus two standard deviations for that given month. Depending on which of eight sites studied, between 5% and 7% of the total days exhibited an extreme aerosol event due to either extreme levels of PM, PM, and/or fine soil. Grand Canyon exhibited the most extreme event days (120, , 7% of its total days). Read More

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http://dx.doi.org/10.3390/atmos7010001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4830501PMC
January 2016
1 Read

Windblown Dust Deposition Forecasting and Spread of Contamination around Mine Tailings.

Atmosphere (Basel) 2016 Feb 28;7(2). Epub 2016 Jan 28.

Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA.

Wind erosion, transport and deposition of windblown dust from anthropogenic sources, such as mine tailings impoundments, can have significant effects on the surrounding environment. The lack of vegetation and the vertical protrusion of the mine tailings above the neighboring terrain make the tailings susceptible to wind erosion. Modeling the erosion, transport and deposition of particulate matter from mine tailings is a challenge for many reasons, including heterogeneity of the soil surface, vegetative canopy coverage, dynamic meteorological conditions and topographic influences. Read More

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http://dx.doi.org/10.3390/atmos7020016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5658141PMC
February 2016
2 Reads

Decreasing Aerosol Loading in the North American Monsoon Region.

Atmosphere (Basel) 2016 Feb 5;7(2). Epub 2016 Feb 5.

Department of Hydrology and Atmospheric Sciences, Tucson, AZ 85721, USA.

We examine the spatio-temporal variability of aerosol loading in the recent decade (2005-2014) over the North American Monsoon (NAM) region. Emerging patterns are characterized using aerosol optical depth (AOD) retrievals from the NASA Terra/Moderate Resolution Imaging Spectroradiometer (MODIS) instrument along with a suite of satellite retrievals of atmospheric and land-surface properties. We selected 20 aerosol hotspots and classified them into fire, anthropogenic, dust, and NAM alley clusters based on the dominant driver influencing aerosol variability. Read More

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http://dx.doi.org/10.3390/atmos7020024DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5422029PMC
February 2016
1 Read

A Multi-Year Aerosol Characterization for the Greater Tehran Area Using Satellite, Surface, and Modeling Data.

Atmosphere (Basel) 2014 Apr;5(2):178-197

Department of Civil & Environmental Engineering, University of California, Irvine, Irvine, CA 92697, USA.

This study reports a multi-year (2000-2009) aerosol characterization for metropolitan Tehran and surrounding areas using multiple datasets (Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging Spectroradiometer (MISR), Total Ozone Mapping Spectrometer (TOMS), Goddard Ozone Chemistry Aerosol Radiation and Transport (GOCART), and surface and upper air data from local stations). Monthly trends in aerosol characteristics are examined in the context of the local meteorology, regional and local emission sources, and air mass back-trajectory data. Dust strongly affects the region during the late spring and summer months (May-August) when aerosol optical depth (AOD) is at its peak and precipitation accumulation is at a minimum. Read More

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http://www.mdpi.com/2073-4433/5/2/178
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http://dx.doi.org/10.3390/atmos5020178DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4114406PMC
April 2014
5 Reads

Effects of Floor Level and Building Type on Residential Levels of Outdoor and Indoor Polycyclic Aromatic Hydrocarbons, Black Carbon, and Particulate Matter in New York City.

Atmosphere (Basel) 2011 May;2(2):96-109

Division of Pulmonary, Allergy and Critical Care of Medicine, College of Physicians and Surgeons, Columbia University, PH8E, 630 W. 168 St. New York, NY 10032, USA.

Consideration of the relationship between residential floor level and concentration of traffic-related airborne pollutants may predict individual residential exposure among inner city dwellers more accurately. Our objective was to characterize the vertical gradient of residential levels of polycyclic aromatic hydrocarbons (PAH; dichotomized into Σ(8)PAH(semivolatile) (MW 178-206), and Σ(8)PAH(nonvolatile) (MW 228-278), black carbon (BC), PM(2.5) (particulate matter) by floor level (FL), season and building type. Read More

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http://dx.doi.org/10.3390/atmos2020096DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3163303PMC
May 2011
22 Reads
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