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Showing 1 to 20 of 44 for “"Black carbon (BC)"”.

  1. COMMUTER EXPOSURE TO AEROSOL POLLUTION ON PUBLIC TRANSPORT IN SINGAPORE

    TAN SOK HUANG2015

    … of PM10, PM2.5, particle number (PN), black carbon (BC), carbon monoxide (CO), particulate polycyclic aromatic hydrocarbons (pPAH), and active surface area (ASA) were taken in downtown Singapore on bus, taxi, MRT, and by walking. Simultaneous measurements of PM, PN, and CO were taken at …

    nus Repository record

  2. Black Carbon Measurements of Snow and Ice Using the Single Particle Soot Photometer: Method Development and an AD 1852-1999 Record of Atmospheric Black Carbon from a Mount Logan Ice Core

    Menking, James Andrew2020

    <p>Black carbon (BC), produced by the combustion of fossil and biofuels, warms the climate by absorbing solar radiation when in the atmosphere and by reducing the albedo of snow and ice when deposited. Measuring BC in snow and ice is important for estimating albedo reduction and developing …

    central-wash Repository record

  3. Assessment of Black Carbon in Snow and Ice from the Tibetan Plateau and Pacific Northwest

    Jenkins, Matthew Glen2020

    … Mountains were analyzed for concentrations of black carbon (BC) using a Single Particle Soot Photometer (SP2). From the ice core, the high-resolution BC record displayed substantial variability, a 2-fold increase in peak concentrations from 1853-1930 to 1930-1983, and a 1.6-fold increase in …

    central-wash Repository record

  4. Molecular and isotopic records of combustion inputs to the environment over the last 250 years

    Lima, Ana Lucia Cessel deMassachusetts Institute of Technology and Woods Hole Oceanographic Institution2004

    … ubiquitous source of polycyclic aromatic hydrocarbons (PAHs) to the environment is incomplete combustion. This study generated a high-resolution historical record of pyrogenic PAH emissions since pre-industrial times from anoxic aquatic sediments, allowing for detailed comparison with energy …

    woods-hole Repository record

  5. Molecular and isotopic records of the combustion inputs to the environment over the last 250 yrs

    Lima, Ana Lúcia Cessel de, 1969-Massachusetts Institute of Technology2004

    … ubiquitous source of polycyclic aromatic hydrocarbons (PAHs) to the environment is incomplete combustion. This study generated a high-resolution historical record of pyrogenic PAH emissions since pre-industrial times from anoxic aquatic sediments, allowing for detailed comparison with energy …

    mit Repository record

  6. Black carbon in marine sediments : quantification and implications for the sorption of polycyclic aromatic hydrocarbons

    Accardi-Dey, AmyMarie, 1976-Massachusetts Institute of Technology2003

    … determining the fate of polycyclic aromatic hydrocarbons (PAHs) in the environment. Here, PAH sorption is proposed as the sum of two mechanisms: absorption into a biogenic, organic carbon (OC) fraction and adsorption onto a combustion-derived, black carbon (BC) fraction. To study BC adsorption, a …

    mit Repository record

  7. Laser-based method for black carbon determination in lake sediment cores and black carbon deposition in Greenland since 300 CE

    Chellman, Nathan J.2016

    Black carbon (BC) is a conservative tracer for industrial combustion and open biomass burning that has a significant contribution to Earth's radiative budget. Because BC is a dark, light-absorbing particle, BC is estimated by the Intergovernmental Panel on Climate Change (IPCC) to have a forcing of …

    unr Repository record

  8. Post-wildfire black carbon deposition on the snowpack in the Cascade Range, Washington State: Temporal and spatial variability with implications for accelerated melt

    Uecker, Ted2019

    … impurities (LAI) on the snowpack. LAI such as black carbon (BC), burned woody debris, and dust reduce snow albedo (reflectance), accelerate melt, and affect the timing and availability of water resources. Charred trees in post-wildfire forests provide a significant source of BC that is …

    central-wash Repository record

  9. 150 Years of Light Absorbing Impurity Deposition on South Cascade Glacier, Washington State USA

    Pittenger, Dan2022

    … the cause of glacial decline, the deposition of black carbon (BC) can also contribute to increased melt. BC, commonly referred to as soot, is produced by the incomplete combustion of fossil and biofuels. These particles are subject to atmospheric transport and are deposited on snow by wind and …

    central-wash Repository record

  10. Measurements that fill gaps in emission inventories: gas flares, household biomass stoves, and brick kilns

    Weyant, Cheryl LynnUniversity of Illinois at Urbana-Champaign2019

    … sources, there were few previous measurements of black carbon (BC) aerosol and poor understanding of the variability in emissions expected. Aircraft facilitated measurements of flares in the Bakken region showed that BC emission factors were 10 times lower than previously predicted and varied over …

    uiuc Repository record

  11. Techno-economic assessment of jet fuel naphthalene removal to reduce non-volatile particulate matter emissions

    Weibel, Drew(Drew E.)Massachusetts Institute of Technology2018

    … as a precursor to aviation-attributable black carbon (BC) emissions. Given its 1-2 vol% concentration in jet fuel, there are several refining processes that may be used to remove naphthalene without impacting its ability to meet specification. This study evaluates the economic feasibility …

    mit Repository record

  12. Association between Air Pollution Exposure and Self-Report of Recent Respiratory Infection: A MESA Air study

    Miller, Carly Marie2014

    … (PM2.5), oxides of nitrogen (NOx and NO2), and black carbon (BC) were estimated. Cross-sectional and longitudinal associations were examined with generalized linear models for each pollutant adjusted for confounders: study site, season of exam, age, sex, race/ethnicity, smoking, and …

    washington Repository record

  13. Black carbon in the Gulf of Maine : new insights into inputs and cycling of combustion-derived organic carbon

    Flores Cervantes, Déborah Xanat, 1978-Massachusetts Institute of Technology2008

    Emissions of black carbon (BC), the soot and char formed during incomplete combustion of fossil and biomass fuels, have increased over the last century and are estimated to be between 8 and 270 Tg BC/yr. BC may affect problems as diverse as global warming, human health, carbon cycling in …

    mit Repository record

  14. Mobile Laboratory Measurement of Black Carbon, Particulate Polycyclic Aromatic Hydrocarbons and Other Exhaust Emissions in Mexico City

    Jiang, MeiVirginia Tech2005

    Black carbon (BC) and polycyclic aromatic hydrocarbons (PAHs) are two atmospheric pollutants produced by motor vehicles using carbonaceous fuels. As a part of the Mexico City Project, measurements of BC, PPAHs and many other gas- and particle-phase emissions were measured in Mexico City using a …

    vt Repository record

  15. Constraining a historical black carbon emission inventory of the United States from 1960-2000

    Sun, TianyeUniversity of Illinois at Urbana-Champaign2014

    In order to improve the accuracy of the black carbon (BC) historical emission inventory of the United States over the period 1960-2000, I studied the transport of global BC emissions and ambient air concentrations using the Community Atmosphere Model. I formulated the relationship between emissions …

    uiuc Repository record

  16. ELEVATED PYROGENIC ORGANIC MATTER IN SEDIMENTS FROM LAKE BOSUMTWI, GHANA AS A PROXY FOR THE TERMINATION OF THE AFRICAN HUMID PERIOD

    Zigah, Michael PaulEast Carolina University2025

    … history of northern Africa, using total organic carbon (TOC), soot carbon (Csoot), and other markers of pyrolysis in a sediment core from Lake Bosumtwi, Ghana, west Africa. The African climate has been dynamic throughout the Quaternary, influenced by multiple drivers varying in duration and …

    ecu Repository record

  17. Sensitivity of black carbon aging to modeling assumption in CAM-chem

    Li, YinruiUniversity of Illinois at Urbana-Champaign2018

    Black carbon (BC) aerosol strongly absorbs visible light and therefore has a warming impact on climate. Quantifying this impact requires us to develop faithful model representations of its climate-relevant properties, such as CCN activity and optical properties. One key process that needs to be …

    uiuc Repository record

  18. Thermodynamics and kinetics of hydrophobic organic compound sorption in natural sorbents and quantification of black carbon by electron microscopy

    Kuo, Dave Ta Fu, 1978-Massachusetts Institute of Technology2010

    … and literature data suggested logKoc (organic-carbon normalized partition coefficient) and logKBC (black-carbon normalized partition coefficient) values were fairly constant across different geosorbents (around 4.5-5.7 and 5.6-6.3, respectively), while the non-linearity exponent varied …

    mit Repository record

  19. Investigating the effect of variability in biomass burning emissions inventories on GEOS-Chem modeled trace gas and aerosol concentrations

    Su, Flora K. (Flora Kathleen)Massachusetts Institute of Technology2018

    … (FINNy 1), affects modeled concentrations of carbon monoxide (CO), nitrogen oxide (NO), black carbon (BC) aerosol, and organic carbon (OC) aerosol. We find that biomass burning emissions significantly impacted concentrations of CO, BC, and OC over the U.S., and that the estimated seasonal …

    mit Repository record

  20. Exploring the absorption properties and direct radiative impact of atmospheric carbonaceous aerosols

    Wang, Xuan, Ph. D. Massachusetts Institute of TechnologyMassachusetts Institute of Technology2017

    … radiative effect (DRE), the absorption from carbonaceous aerosols, including black carbon (BC) and brown carbon (BrC, a component of organic aerosol, OA), are highly uncertain. This thesis addresses this uncertainty by combining models and observations to better constrain the optical …

    mit Repository record

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