Thursday, April 15, 2021

Journal Article - Estimating short-term mortality benefits associated with a reduction in tropospheric ozone

Journal Article - A decade of measuring on-road vehicle emissions with remote sensing in Australia

Journal Article - Real-world emissions from modern heavy-duty vehicles: Sensitivity analysis of in-use emissions analysis methods

Journal Article - On the relationship between congestion and road safety in cities

Journal Article - Uncertainties in the EDGAR emission inventory of GHGs

Tuesday, April 13, 2021

Journal Article - Air quality modeling to inform pollution mitigation strategies in Bogota

Journal Articles - Deep learning-based downscaling of tropospheric nitrogen dioxide using ground-level and satellite observations

Journal Article - Measurements of Ambient PM2.5 in Kinshasa and Brazzaville Using Field-calibrated Low-cost Sensors

Journal Article - Air quality standards for the concentration of PM2.5 (WHO)

Video - Bhutan isn't just carbon neutral — it's carbon negative (TED)

Video -‘Climate Change: Science and Policy’ Lecture by Mario Molina

Video - Explained | World's Water Crisis | FULL EPISODE | Netflix

Video - The Physics of Climate Change Online Lecture with Lawrence Krauss

Infograph - Today/Tomorrow's PM2.5 Pollution Map for the Greater Delhi Region

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Infograph - Today/Tomorrow's Sources of PM2.5 Pollution in Delhi

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Thursday, April 01, 2021

Journal Article - Photovoltaics in Sweden – Success or failure?

Journal Article - Blowing in the wind: A brief history of wind energy and wind power technologies in Denmark

Journal Article - Gap between on-road and official fuel efficiency of passenger vehicles in China

Journal Article - On the Relevancy of Observed Ozone Increase during COVID-19 Lockdown to Summertime Ozone and PM2.5 Control Policies in China

Journal Article - Development of land-use regression models for predicting ambient concentrations in northern Taiwan

Journal Article - Evaluating stratospheric ozone and water vapour changes in CMIP6 models from 1850 to 2100

Journal Article - Validation of the Sentinel-5 Precursor TROPOMI cloud data with Cloudnet, Aura OMI O2–O2, MODIS, and Suomi-NPP VIIRS

Thursday, March 25, 2021

Journal Article - Exploring NH3 behavior in urban and suburban Beijing

Infographic - What is AQI?

What AQI does is unification of all the complicated science of pollution composition, exposure rate based health severity, ambient standards, and measurement and standard protocols, into simple color coded bins for everyone to see how good or bad or ugly the pollution levels are and understand the necessary alertness. 
More such questions are answered in SIM-series # 46-2021 - 10 frequently asked questions on Air Quality Index (AQI)

Journal Article - Temporally resolved sectoral and regional contributions to air pollution in Beijing

Journal Article - A revised mineral dust emission scheme in GEOS-Chem: improvements in dust simulations over China

Journal Article - AtChem (version 1), an open-source box model for the Master Chemical Mechanism

Sunday, March 21, 2021

Infographic - What is the difference between fine and coarse particulate matter?


There is constant confusion between PM2.5 vs. PM10 and “fine vs. coarse” fractions of particulate matter. The schematic above presents an overview of what is part of each of these fractions and they are broadly defined like this

  • PM2.5 – this is all the particulate matter under 2.5 um
  • PM10 – this is all the particulate matter under 10.0 um
  • Fine PM – this is all the particulate matter under 2.5 um, which is same of PM2.5
  • Coarse PM – this is all the particulate matter between 2.5 and 10 um
More such questions are answered in SIM-series # 44-2021 - 10 frequently asked questions on particulate matter (PM) 

Journal Article - The future of coal-fired power generation in Southeast Asia

Journal Article - Ozone a persistent challenge to food security in India: Current status and policy implications

Journal Article - Implication of emission regulation on cost and tariffs of coal-based power plants in India

Wednesday, March 10, 2021

Journal Article - Promoting public transport as a strategy to reduce GHG emissions from private vehicles in Kuwait

Journal Article - Urban Transport Assessment of Emissions and Resource Demand of Climate Protection Scenarios

Journal Article - Measuring on-road vehicle emissions with remote sensing in Australia

Journal Article - The application of land use regression model to investigate spatiotemporal variations of PM2.5 in Guangzhou, China

Journal Article - Global impact of COVID-19 restrictions on the surface concentrations of nitrogen dioxide and ozone

Thursday, March 04, 2021

Infographic - What is the difference between primary and secondary particulate matter?


Primary is a direct emission source and forms a significant portion of the PM pollution, comprising of metals, elemental carbon (also known as black carbon), and organic carbon. Other primary pollutants include sulfur dioxide, nitrogen oxides, volatile hydrocarbons, methane, carbon monoxide, and carbon dioxide. 

Secondary is due to chemical transformation of primary gaseous emissions. In PM, the secondary aerosol components include sulfates from sulfur dioxide emissions, nitrates from nitrogen oxide emissions, organic aerosols from hydrocarbon emissions, and ammonium from ammonia emissions. The path and the quantity of chemical transformation depends on the strength of the pollutant emissions and the mix of the emissions. In an atmospheric chemical mechanism, these interlinkages can run into 300 equations. Other secondary pollutants include ozone – a result of a mix of reactions between nitrogen oxides and hydrocarbon emissions in the presence of sunlight. 

More such questions are answered in SIM-series # 44-2021 - 10 frequently asked questions on particulate matter (PM)

Tuesday, February 09, 2021

Monitoring Ambient Air Quality in Indian NCAP City Airsheds

In this SIM-air Working Paper Series # 40-2021, we defined (a) the size of NCAP city airsheds (b) the recommended number of ambient air quality monitoring sites in an airshed (c) the operational sampling frequency to support receptor-based source apportionment studies. These resources are necessary for strengthening the monitoring needs of an airshed to track pollution levels, to conduct receptor-model-based source apportionment studies, and to support long-term air quality management plans.
[Download the full document]
[Download grid & airshed information by city]
[More supporting material is posted here]

Resource Links: Energy, Emissions, & Air Pollution Analysis in India

Here we present a repository of resource links with information directly relevant for energy, emissions, and pollution analysis in India covering

  1. Official national and state level portals; guidelines, acts, and rules documents
  2. Ambient air quality monitoring
  3. Satellite retrievals and tools
  4. Global and regional health impact analysis and tools
  5. Compiled statistics, maps, and other geospatial databases
  6. Compiled databases on energy, emissions, meteorology, and reanalysis fields
  7. Compiled statistics on Indian energy sectors

This list was last updated in January 2021. You can download all the links as a PDF working paper.

Journal Article - Carbon and air pollutant emissions from China's cement industry 1990–2015

Monday, February 01, 2021

Video - Are we running out of clean water? (TED-Ed)

Video - What if there were 1 trillion more trees? (TED-Ed)

Video - Why Cities Need Trees (TED-Ed)

Journal Articles - The mortality impacts of current and planned coal-fired power plants in India

Journal Article - Energy and air pollution benefits of household fuel policies in northern China

Journal Article - Clean Air Actions and Air Quality Improvements — Beijing-Tianjin-Hebei and Surrounding Areas, China, 2013−2019

Journal Articles - Indian annual ambient air quality standard is achievable by completely mitigating emissions from household sources

Journal Article - Residential emissions in Beijing: About 400 × 10^4 tons

Tuesday, January 19, 2021

Journal Article - A revised mineral dust emission scheme in GEOS-Chem: improvements in dust simulations over China

Journal Article - Development of the adjoint of GEOS-Chem

Journal Article - Lightning NOx emissions over the USA constrained by TES ozone observations and the GEOS-Chem model

Journal Article - Constraints on ship NOx emissions in Europe using GEOS-Chem and OMI satellite NO2 observations

Journal Article - Evaluation of European air quality modelled by CAMx including the volatility basis set scheme

Journal Article - Biomass burning combustion efficiency observed from space using measurements of CO and NO2 by TROPOMI