William (Bill) Bloss


School of Geography, Earth & Environmental Sciences, University of Birmingham

Atmospheric processing affects the current and future composition of our atmosphere, with impacts upon human and environmental health, air quality and climate.

My group's work improves understanding of the causes of poor air quality.  We focus upon the sources of pollutants, and the atmospheric chemical processes which remove some air pollutants and produce others.  Our science informs the development of effective policy measures to improve air quality.




Atmospheric processing affects the current and future composition of our atmosphere, and impacts upon human and environmental health, air quality and climate.  My research group addresses areas of atmospheric chemistry and clean air science, including


- Understanding the sources and transformations of air pollutants such as Particulate Matter and Nitrogen Dioxide in the urban atmosphere, ranging from the UK to developing megacities such as Delhi

- Quantifying the sources and sinks for atmospheric oxidants: Impacts upon urban air quality and tropospheric composition from new processes such as the formation of Criegee Intermediates, HONO and particulate-mediated renoxification

- Applying air pollution science to improve local and regional air quality policy measures, to ensure these can most effectively and efficiently improve human and environmental health


Work in the group combines atmospheric field measurements, simulation chamber and laboratory studies and numerical modelling approaches; we currently have an emphasis upon developing new integrated approaches to assess chemical processing (a complement to the traditional focus upon species abundance).​


While we are aiming to achieve fundamental understanding of the atmospheric chemical system, our work also takes place in an applied context: providing the knowledge to underpin policy development to alleviate air pollution.

This is my personal research website.  Please also see my official University of Birmingham homepage.

Research Projects

West Midlands Air Pollution Improvement

WM-Air is a five-year initiative to support the improvement of air quality, and associated health, environmental and economic benefits, in the West Midlands, applying existing air quality, health and economic science to deliver regional impact.


Air Pollutant Sources in the Delhi NCR

ASAP-Delhi will provide authoritative assessment of the sources, formation process, burden and characteristics of air pollutants in Delhi, with a philosophy of deriving pollutant source, budget and behaviour insights from direct atmospheric observations.


Air Pollution Sources and Processes in Beijing

The AIRPOLL and AIRPRO projects will identify the emission sources and chemical transformations giving rise to poor air quality - haze - in Beijing.


Sources of Nitrous Acid (HONO)

Nitrous acid (HONO) is emitted by vehicles alongside nitrogen dioxide, by soil bacteria, and potentially from aerosol particles - affecting atmospheric oxidation - but the magnitude of these sources if not well understood.


Integrated Chemistry of Ozone

Ozone is harmful to human health, vegetation and ecosystems.  We are developing new approaches to understand ozone formation in the UK and elsewhere


Reactions of Criegeee Intermediates

Criegee Intermediates (CIs) are newly discovered atmospheric oxidants with the potential to remove SO2 and NO2 more rapidly than previously thought.  We are studying the reactions of CIs using large simulation (smog) chambers.


Research Group

Delhi, Beijing, Guangzhou, CEH...

HONO sources in the boundary layer

Postdoctoral Research Fellow

Dr Louisa Kramer

Ozone Production Rates; APHH-India - PM sources in Delhi

Postdoctoral Research Fellow

Dr Leigh Crilley

Total Ozone Reactivity

Personal Website

Postdoctoral Research Fellow

Dr Roberto Sommariva

APHH India - Delhi

Postdoctoral Research Fellow

Dr Salim Alam

Simulation of atmospheric ClNO2 chemistry in urban environments

With Francis Pope

Doctoral Researcher

Tara Rasoul

Real world vehicle NO2 emissions and inside / outside vehicle pollution exposure

With Francis Pope

Doctoral Researcher

Vasilis Matthaios

Particulate Matter (PM2.5) Composition, Sources and Toxicity in Dammam, Saudi Arabia.

With Zongbo Shi

Doctoral Researcher

Manna Al-Wadei

Steven Thomson.jpg

Oxidative Potential of particulate matter from Beijing

With Zongbo Shi

Doctoral Researcher

Steven Thomson

Modelling traffic-derived air pollution

Led by Zhaoya Gong, Xiaoming Cai

Doctoral Researcher

Helen Pearce

Earth Observation tools for determining urban air quality and vegetation health

Led by Eloise Marais

Doctoral Researcher

Karn Vohra

D Rooney.jpg

Working on ASAP-Delhi and WM-Air projects

Research Technician

Dr Daniel Rooney

Research Group Alumni

Former PhD Students

Danny Blenkhorn

Kore Technology Ltd

Lubna Al-Saadi

Lecturer at the University of Qatar

Hao Huang

Air Monitors UK, Gloucester​ 

Jian Zhong

Postdoc position in Birmingham

Suad Al-Kindi

Lecturer at Higher College of Technology, Muscat, Oman​

Salim Alam

Postdoc position at Birmingham​

Vivien Bright

Postdoc position at Cambridge​

Kate Faloon

Postdoc positions at Leicester and Leeds / NCAS

Lucy Concannon

MPhil Student: Moved to Azko Nobel

Former Postdocs

Mike Newland

Postdoc positions at UEA and the University of York

Marie Camredon

Lecturer at LISA, Paris

Shana Saha

BSP Optical Performance Centre, Birmingham

Catherine Bale

Postdoc position at the University of Leeds

Microsoft ExCel - Advanced

Microsoft Word - Advanced

Power Point - Proficient

Adobe - Proficient

French - Mother Tongue

Spanish - Advanced




Google Scholar

Reseacher-ID Profile


Research Funding

NERC funding via Grants-on-the-Web

External Profiles



Present: Professor of Atmospheric Sciences and Head of School,

School of Geography, Earth and Environmental Sciences; University of Birmingham. 


2001 - 2006: Research Fellow; Lecturer, School of Chemistry, University of Leeds. 


1999 - 2001: Caltech Postdoctoral Scholar, NASA Jet Propulsion Laboratory 

1995 - 1999: Ph.D. (Physical Chemistry), University of Cambridge

1992 - 1995: BA (Natural Sciences – Chemistry), University of Cambridge.

1991 - 1992: Institute of Oceanographic Sciences, Deacon Laboratory



NERC: Core Peer Review College

Fellow of the Royal Society of Chemistry (FRSC)

Chair, RSC Environmental Chemistry Group (2013 - 2015)

Co-editor, Atmospheric Chemistry and Physics (to 2016)


© 2018 By William Bloss

William (Bill) Bloss

Head of School

Professor of Atmospheric Science

School of Geography, Earth & Environmental Sciences,
University of Birmingham,
B15 2TT, UK
University Homepage