Is this you? As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.
Claim your profile
Articles by August Andersson
Observationally Constrained Wintertime Emission Fluxes and Atmospheric Lifetime of Black Carbon in South Asia
1. Introduction Click to copy section linkSection link copied! Combustion-derived black carbon (BC) aerosols contribute to regional warming and affect air quality/human health, yet the climate impact of BC remains highly uncertain. (1−7) One of the factors contributing to this uncertainty is the poorly constrained model estimates of the atmospheric burden of BC.
Observational Evidence of Large Contribution from Primary Sources for Carbon Monoxide in the South Asian Outflow
Introduction Carbon monoxide (CO), a ubiquitous and reactive trace gas, plays a fundamental role in the global atmospheric chemistry. (1) The main sink of CO (∼90%) is the reaction with the tropospheric hydroxyl radical (OH•). (1,2) This reaction is reciprocally also the single largest mechanism for OH• loss (∼40%), thereby making CO an important controller of the oxidizing potential of the troposphere.
Wintertime Air Quality in Megacity Dhaka, Bangladesh Strongly Affected by Influx of Black Carbon Aerosols from Regional Biomass Burning
Clean air is a key parameter for a sustainable society, and currently, megacity Dhaka has among the worst air qualities in the world. This results from poorly constrained contributions of a variety of sources from both local emissions and regional influx from the highly polluted Indo-Gangetic Plain, impacting the respiratory health of the 21 million inhabitants in the Greater Dhaka region. An important component of the fine particulate matter (PM2.5) is black carbon (BC) aerosols.
Mechanisms for log normal concentration distributions in the environment - Scientific Reports
Abstract Log normal-like concentration distributions are ubiquitously observed in the environment. However, the mechanistic origins are not well understood. In this paper, we show that first order exponential kinetics onsets log-normal concentration distributions, under certain assumptions. Given the ubiquity of exponential kinetics, e.g., source and sink processes, this model suggests an explanation for the frequent observation in the environment, and elsewhere.
Source Quantification of South Asian Black Carbon Aerosols with Isotopes and Modeling
Introduction The impacts of combustion-derived black carbon (BC) on regional warming and effects on air quality and human health are large, yet remain highly uncertain, despite considerable recent scientific attention.(1−7) This is particularly troublesome for highly populated, high-pollution regions such as South Asia.(1−3) BC is implicated to also cause a multitude of secondary effects in this region such as monsoon shifts, increased frequencies of storms, surface dimming, melting of...
Photochemical degradation affects the light absorption of water-soluble brown carbon in the South Asian outflow
Abstract Light-absorbing organic aerosols, known as brown carbon (BrC), counteract the overall cooling effect of aerosols on Earth’s climate. The spatial and temporal dynamics of their light-absorbing properties are poorly constrained and unaccounted for in climate models, because of limited ambient observations.
Divergent Evolution of Carbonaceous Aerosols during Dispersal of East Asian Haze
High anthropogenic aerosol concentrations in January 2014 enveloped a vast area of East Asia (AOD?>?0.3; Fig. 1), strongly affecting regional air quality and radiative budget. The analysis of NOAA HYSPLIT back trajectories (BT)30 indicate prevailing air mass transport from continental northeast Asia to the regional-scale receptor site KCOG during this time (Figs S2–12).
Reconciling modeling with observations of radiative absorption of black carbon aerosols
The physical treatment of internal mixing and aging of black carbon (BC) aerosols that allow for enhanced solar absorption of the BC is an important parameterization in climate models. Many climate models predict a factor of 2-3 lower aerosol absorption optical depth (AAOD) than the atmospheric columnar absorption observed from ground-based networks such as AERONET, likely because these models do not parameterize properly the BC absorption enhancement (E ).
Carbon isotope-constrained seasonality of carbonaceous aerosol sources from an urban location (Kanpur) in the Indo-Gangetic Plain
The Indo-Gangetic Plain (IGP) in northern India, Pakistan and Bangladesh is a major source of carbonaceous aerosols in South Asia. However, poorly constrained seasonality of their sources over the IGP leads to large uncertainty in climate and health effects.
Show More
loading
Actions
Is this you?
As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.Get in touch with August
Contact August, search articles and posts on X, monitor coverage, and track replies from one place.
Learn more about Muck Rack