Results 51 to 60 of about 777,565 (426)

The formation, properties and impact of secondary organic aerosol: current and emerging issues

open access: yes, 2009
Secondary organic aerosol (SOA) accounts for a significant fraction of ambient tropospheric aerosol and a detailed knowledge of the formation, properties and transformation of SOA is therefore required to evaluate its impact on atmospheric processes ...
M. Hallquist   +26 more
semanticscholar   +1 more source

Aerodynamic Characteristics and RNA Concentration of SARS-CoV-2 Aerosol in Wuhan Hospitals during COVID-19 Outbreak

open access: yesbioRxiv, 2020
Background The ongoing outbreak of COVID-19 has spread rapidly and sparked global concern. While the transmission of SARS-CoV-2 through human respiratory droplets and contact with infected persons is clear, the aerosol transmission of SARS-CoV-2 has been
Yuan Liu   +14 more
semanticscholar   +1 more source

Specifying the light-absorbing properties of aerosol particles in fresh snow samples, collected at the Environmental Research Station Schneefernerhaus (UFS), Zugspitze [PDF]

open access: yesAtmospheric Chemistry and Physics, 2019
Atmospheric aerosol particles like mineral dust, volcanic ash and combustion particles can reduce Earth's snow and ice albedo considerably even by very small amounts of deposited particle mass. In this study, a new laboratory method is applied to measure
M. Schnaiter   +8 more
doaj   +1 more source

Terrestrial or marine – indications towards the origin of ice-nucleating particles during melt season in the European Arctic up to 83.7° N [PDF]

open access: yesAtmospheric Chemistry and Physics, 2021
Ice-nucleating particles (INPs) initiate the primary ice formation in clouds at temperatures above ca. −38 ∘C and have an impact on precipitation formation, cloud optical properties, and cloud persistence. Despite their roles in both weather and climate,
M. Hartmann   +13 more
doaj   +1 more source

The MERRA-2 Aerosol Reanalysis, 1980 - onward, Part I: System Description and Data Assimilation Evaluation.

open access: yesJournal of Climate, 2017
The Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) updates NASA's previous satellite era (1980 - onward) reanalysis system to include additional observations and improvements to the Goddard Earth Observing System ...
C. Randles   +12 more
semanticscholar   +1 more source

Influence of vertical transport on free tropospheric aerosols over the central USA in springtime [PDF]

open access: yes, 1998
Measurements of the atmospheric aerosol chemical composition during the Subsonic Aircraft: Contrail and Cloud Effects Special Study (SUCCESS) indicate substantial vertical transport of boundary layer aerosol to the free troposphere over the south-central
Dibb, Jack E., Loomis, M, Talbot, R.
core   +2 more sources

Characterization and first results from LACIS-T: a moist-air wind tunnel to study aerosol–cloud–turbulence interactions [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
The interactions between turbulence and cloud microphysical processes have been investigated primarily through numerical simulation and field measurements over the last 10 years.
D. Niedermeier   +6 more
doaj   +1 more source

A flexible inversion algorithm for retrieval of aerosol optical properties from Sun and sky radiance measurements

open access: yes, 2000
The problem of deriving a complete set of aerosol optical properties from Sun and sky radiance measurements is discussed. Algorithm development is focused on improving aerosol retrievals by means of including a detailed statistical optimization of the ...
O. Dubovik, M. King
semanticscholar   +1 more source

Counting on chemistry: laboratory evaluation of seed-material-dependent detection efficiencies of ultrafine condensation particle counters [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
Condensation particle counters (CPCs) are crucial instruments for detecting sub-10 nm aerosol particles. Understanding the detection performance of a CPC requires thorough characterization under well-controlled laboratory conditions.
P. J. Wlasits   +7 more
doaj   +1 more source

Recognition of aerosol transmission of infectious agents: a commentary

open access: yesBMC Infectious Diseases, 2019
Although short-range large-droplet transmission is possible for most respiratory infectious agents, deciding on whether the same agent is also airborne has a potentially huge impact on the types (and costs) of infection control interventions that are ...
R. Tellier   +3 more
semanticscholar   +1 more source

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