Loading...
  • particles
  • Aerosols are fine particles suspended in the atmosphere. (environmental-expert.com)
  • The impact that human-generated and natural atmospheric particles (aerosols) could be having on Australia's climate will be discussed next week in Canberra at a workshop involving some of the world's leading experts in the area. (environmental-expert.com)
  • Smoke particles and trace gases emitted from wildfires are a growing contributor to poor air quality events in the Mid-Atlantic region of the United States. (confex.com)
  • However, since aerosols comprise such a broad collection of particles with different properties, the overall effect is anything but simple. (nasa.gov)
  • In 1991, the eruption of Mount Pinatubo in the Philippines ejected more than 20 million tons of sulfur dioxide-a gas that reacts with other substances to produce sulfate aerosol-as high as 60 kilometers (37 miles) above the surface, creating particles in the stratosphere. (nasa.gov)
  • Despite its small size, Glory will deploy an innovative aerosol-sensing instrument called the Aerosol Polarimetry Sensor (APS) that many specialists predict will produce dramatic improvements in measuring airborne particles, as well as an important sensor that will help maintain a 32-year record of the sun's irradiance. (nasa.gov)
  • It might just as well stand for aerosols, as the A-Train satellites have proven especially important in the study of the tiny airborne particles, which can have an outsized impact on the climate. (nasa.gov)
  • Aerosols are small particles suspended in air, with lifetimes of 1-2 weeks in the atmosphere. (colorado.edu)
  • plumes
  • High spatial resolution aerosol products from the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument on the Suomi National Polar-orbiting Partnership (SNPP) satellite can pinpoint when smoke plumes are present in the Mid-Atlantic region. (confex.com)
  • As this research could not separately quantify the POA oxidation and SOA formation processes, further studies should attempt to investigate the contribution of gaseous precursor oxidation and POA aging to the OOA formation in wildfire plumes. (earthobservatory.sg)
  • Water uptake by black carbon (BC)-containing aerosol was quantified in North American wildfire plumes of varying age (1 to ~40 h old) sampled during the SEAC4RS mission (2013). (uio.no)
  • The researchers will conduct measurements near active fires, where limited observations indicate rapid changes in aerosol properties, and in biomass burning plumes more than five hours old. (bnl.gov)
  • gases
  • Particulate pollutants or aerosols and associated gases from fossil and biomass burning cause persistent environment problems worldwide. (earthobservatory.sg)
  • Based on online wildfire satellite-monitoring data, distributions of burned-out areas, as well as emission volumes of carbon-containing gases (СО and СО 2 ) and fine aerosols (РМ 2.5 ), for different regions and months in 2005-2016 (across the territory of Russia) and in 2010-2016 (northern Eurasia) are analyzed. (springer.com)
  • Distinctive features of the seasonal behavior of wildfires and emission volumes of carbon-containing gases and fine aerosols for different regions of northern Eurasia are determined. (springer.com)
  • Models estimate that aerosols have had a cooling effect that has counteracted about half of the warming caused by the build-up of greenhouse gases since the 1880s. (nasa.gov)
  • However, unlike many greenhouse gases, aerosols are not distributed evenly around the planet, so their impacts are most strongly felt on a regional scale. (nasa.gov)
  • This study reports an extensive set of emission factors (EFs) for over 80 gases and 5 components of submicron particulate matter (PM 1 ) from these temperate wildfires. (osti.gov)
  • These researchers are following the transport and transformation of the plume of gases and aerosols emitted by wildfires to understand the chemical changes they undergo over time, how their properties might vary, and their impacts on human health and the environment," said Sylvia Edgerton, a program director in NSF's Division of Atmospheric and Geospace Sciences, which funds WE-CAN. (nsf.gov)
  • n] Greenhouse gases and atmospheric aerosols both drive extreme precipitation, which is expected to increase with climate change. (mfkp.org)
  • Greenhouse gases (GHGs) and aerosols are the two most important anthropogenic forcing agents in the 21st century. (mfkp.org)
  • The OFRs rapidly (in minutes) oxidized the ambient air (gases and aerosols) with a range of oxidant (OH, O 3 ) exposures, and changes in composition were monitored using aerosol mass spectrometry (AMS). (colorado.edu)
  • types of aerosols
  • Wildfires produce approximately 40 percent of all soot, which has been shown to contribute to global warming, and different stages of burns emit different types of aerosols. (bnl.gov)
  • While we have made good progress in observing aerosol effects with current A-Train sensors, Glory should offer even deeper insights into how specific types of aerosols influence the atmosphere both directly and through their impacts on clouds and precipitation," said Tristan L'Ecuyer, a research scientist at Colorado State University and the coauthor of a recent Physics Today article about the A-Train. (nasa.gov)
  • oxidation
  • Over the past several years, our group has pioneered the development, application and characterization of field-deployable oxidation flow reactors (OFRs) to study ambient aerosol formation and processing. (colorado.edu)
  • Left: Oxidation flow reactors in Brazil exposing air to varying levels of oxidants before the air was analyzed with various gas and aerosol instrumentation below in a climate controlled-container. (colorado.edu)
  • radiative
  • Inputs for the radiative transfer calculations include satellite measurement geometry and surface conditions from OMI, aerosol optical thickness ( τ ) from the Moderate Resolution Imaging Spectroradiometer (MODIS) and aerosol microphysical parameters from the AErosol RObotic NETwork (AERONET), respectively. (atmos-meas-tech.net)
  • The IPCC AR4 image below shows that the direct and cloud albedo effect of aerosols equals a radiative forcing of as much as -2.7 W/m². (blogspot.co.uk)
  • In large sections of the U.S., aerosols from fires contribute a major fraction of aerosol mass, and their year-to-year variability dominates the overall variability of aerosol loading and radiative forcing. (bnl.gov)
  • fires
  • That would be great, but if many of them instead switched to burning biomass in woodburners and open fires, while wildfires increased strongly, the net warming from associated aerosols would increase dramatically. (blogspot.co.uk)
  • The researchers will use the DOE Gulfstream-1 (G-1) aircraft for the campaign and plan to log 120 hours of flight time, focusing on wildfires in the vicinity of Pasco, Washington, and agricultural fires near Memphis, Tennessee. (bnl.gov)
  • In addition, aerosols released from natural fires are different from manmade ones. (bnl.gov)
  • The observed EFs are compared with previous measurements of temperate wildfires, boreal forest fires, and temperate prescribed fires. (osti.gov)
  • We don't know exactly where the fires will be, but we know that pretty much every year, there is a wildfire burning within a two-hour flight of Boise during the month of August. (nsf.gov)
  • observations
  • Here, long-term observations of aerosol optical depth, surface level aerosol loading, fire-area burned, and hydrologic simulations are used to show that regional-scale increases in aridity and resulting wildfires have significantly increased summertime aerosol loading in remote high elevation regions of the Intermountain West of the United States. (criticalzone.org)
  • The Biomass Burning Observation Project (BBOP) will conduct observations from this Gulfstream-1 aircraft to study the near-field evolution of changes in chemical, optical, and microphysical properties of aerosols generated in biomass burning events. (bnl.gov)
  • Sponsored by the DOE's Atmospheric Radiation Measurement (ARM) Climate Research Facility, the Biomass Burning Observation Project (BBOP) will conduct aircraft observations to study the near-field evolution of changes in chemical, optical, and microphysical properties of aerosols generated in biomass burning events. (bnl.gov)
  • There is still considerable ambiguity about the dominant types of aerosol in satellite observations and the amount of observed aerosol that can be attributed to human activities," he said. (nasa.gov)
  • soot
  • Black carbon aerosols, similar to the soot in a chimney, absorb sunlight rather than reflecting it. (nasa.gov)
  • absorption
  • In this study, we attempt to quantify aerosol absorption by retrieving the single-scattering albedo ( ω 0 ) at 550 nm from the satellite-measured AAI. (atmos-meas-tech.net)
  • scientists
  • Now scientists at MIT believe they may have identified the mechanism that releases this aroma, as well as other aerosols, into the environment. (environmental-expert.com)
  • Scientists believe the cooling from sulfates and other reflective aerosols overwhelms the warming effect of black carbon and other absorbing aerosols over the planet. (nasa.gov)
  • UPTON, N.Y. - Scientists from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory (BNL), working with colleagues from Pacific Northwest National Laboratory (PNNL), will conduct a field campaign this summer and fall in the skies over the Pacific Northwest and Tennessee to measure the evolution of aerosols in wildfires and prescribed agriculture burns, respectively. (bnl.gov)
  • smoky
  • VIIRS aerosol optical thickness (AOT) at 750 m resolution is a quantitative measure of smoke aerosols, and the VIIRS smoke mask provides a qualitative indicator of smoky air. (confex.com)
  • radiation
  • Climatologists describe these scattering and absorbing properties as the "direct effect" of aerosols on Earth's radiation field. (nasa.gov)
  • In addition to scattering or absorbing radiation, aerosols can alter the reflectivity, or albedo, of the planet. (nasa.gov)
  • carbon
  • Aerosols, particularly black carbon, can alter reflectivity by depositing a layer of dark residue on ice and other bright surfaces. (nasa.gov)
  • Long-term accumulation of black carbon aerosols in the Arctic and Himalaya is leading to increased melting of snow. (nasa.gov)
  • high
  • Especially for setting of low mass flows with very high reproducibility Topas launched the Aerosol Generators ATM 221 and ATM 231 as an extension of the very successful product range ATM. (environmental-expert.com)
  • analyze
  • The flights will be the largest, most comprehensive attempt to date to measure and analyze the wildfire smoke that blankets vast swaths of the U.S. every year. (nsf.gov)
  • A comprehensive effort to analyze smoke from western U.S. wildfires is getting under way. (eponline.com)
  • combustion
  • Aerosol properties and their evolution will be determined as a function of fire type, defined according to fuel and the mix of flaming and smoldering combustion at the source. (bnl.gov)
  • Experiments
  • The WE-CAN campaign goes above and beyond other wildfire air-quality experiments conducted in the past, said Fischer. (nsf.gov)
  • smoke
  • Metrohm presents a new method for the sensitive and robust routine determination of the «smoke markers» levoglucosan, mannosan and galactosan in aerosols. (environmental-expert.com)
  • She explained that previous atmospheric science field campaigns have touched on wildfire smoke, but that has not been their main focus. (nsf.gov)
  • instrumentation
  • TSI Incorporated, a global leader in aerosol instrumentation, expands its innovative line of Environmental DustTrak™ Aerosol Monitors , now offering three additional models which meet the United Kingdom's environmental agency Monitoring Certification Scheme (MCERTS) for indicative ambient particulate monitors. (environmental-expert.com)
  • composition
  • We focused our research on understanding and constraining the interplay between the emission sources and chemical processes, and how they affect the formation rates, chemical composition, and physical properties of aerosol. (colorado.edu)
  • observation
  • During that event on 10 to 31 October 2015, we conducted a realtime observation of non-refractory submicron PM (NR-PM1) in Singapore using an Aerodyne aerosol mass spectrometer. (earthobservatory.sg)