Dr Christos Halios
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(0) 118 378 4709
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Lecturer In Sustainable Technologies
Module Convenor, Statistical analysis 2 (CE3STS),
Urban Microclimates (CEM223)
Office
120Building location
Chancellor's BuildingAreas of interest
- Flows in the urban atmosphere across scales from building to neighbourhood and cities.
- Indoor air (ventilation, air quality)
- Interaction of solar radiation with urban trees/ evapotranspiration in the urban environment.
- Applied mathematical methods for analysis of environmental and energy data
Teaching
Convenorship:
CE3STS-Statistical analysis 2 (UG Year 3)
CEM223-Urban Microclimates (MSc)
Contributing to:
CEM10A - Research Skills (MSc)
CEM10/18/19B - Dissertation Supervision (MSc)
CE1EMA-Engineering Mathematics 1(UG Year 1)
CE3DPR-Design Project 3 (Ug Year 3)
CEM221-Energy in Buildings (MSc)
CEM226-ICT and Energy Management
CE3CCD - Dissertation Supervision (UG)
Research centres and groups
- Energy and Environmental Engineering Research Group
- Landscape Research group. A University of Reading Interdisciplinary Sustainable Landscapes Collaboration.
- Trees and Design Action Group – TDAG (https://www.tdag.org.uk/)
Research projects
- 2022: Partner in the research proposal “Movable Orchard Project: A Tree Focused Toolkit for Testing the Health of our Urban Vegetation” submitted for funding in the “Urban Greenspace and People Call” – RECLAIM network.
- 2022: Principal co-Investigator in the submitted for UROP (Undergraduate Research Opportunities Programme) project “Do tree clustering arrangements affect the local microclimate? ”.
- 2021: Principal co-Investigator in the UROP project “Studying the effect of leaf-level biochemistry and canopy-level structural traits on spectral reflectance canopy measurements”.
- 2020: Principal Investigator in the project “Modification of the local microclimate by clusters of trees”. The project will be funded from the Undergraduate Research Opportunities Programme (of the University of Reading UROP Reading).
Background
Dr Halios’s research addresses questions on the urban atmospheric environment related to urban forms (i.e. buildings, green infrastructure), and urban functions (i.e. urban air quality). His research has particularly focused on the experimental and modelling study of the interaction between the urban form and atmospheric flows across scales from building to neighbourhood and cities as well as indoor ventilation; the urban trees – built environment interactions and the modification of the local microclimate by clusters of trees; and of the air quality in a wide range of indoor microenvironments such as residential premises, workplaces and healthcare facilities.
His research experience has been developed during collaboration with: UK Health Security Agency (Environmental Public Health Scientist: 2021-2022), University of Reading -School of Built Environment (Postdoctoral Research Assistant in Thermal Performance of Urban Trees: 2018-2021), University of Reading – Department of Meteorology (Postdoctoral Research Assistant : 2012-2017), Physikalisch-Meteorilogisches Observatorium Davos (PMOD)-World Radiation Center (Visiting Scientist: 2011 and 2012), University of Athens (Research Assistant: 2001-2011).
Academic qualifications
- PhD 2007 (University of Athens, Greece)
- MSc in Environmental Physics (University of Athens, Greece)
- Degree of Physics 1997 (University of Athens, Greece)
Professional bodies/affiliations
- Member of the International Association of Urban Climatology
- Member of UK Indoor Environments Group
Publications
- Gough, H. , Barlow, J. , Luo, Z. , King, M. , Halios, C. , Grimmond, C. (2020) Evaluating single-sided natural ventilation models against full-scale idealised measurements: impact of wind direction and turbulence. Building and Environment , 170 ISSN: 0360-1323 | doi: https://dx.doi.org/10.1016/j.buildenv.2019.106556
- Deng, J. , Pickles, B. , Kavakopoulos, A. , Blanusa, T. , Halios, C. , Smith, S. , Shao, L. (2019) Concept and methodology of characterising infrared radiative performance of urban trees using tree crown spectroscopy. Building and Environment , 157 pp. 380-390. ISSN: 0360-1323 | doi: https://dx.doi.org/10.1016/j.buildenv.2019.04.056
- Lean, H. , Barlow, J. , Halios, C. (2019) The impact of spin up and resolution on the representation of a clear convective boundary layer over London in order 100m grid-length versions of the Met Office Unified Model. Quarterly Journal of the Royal Meteorological Society , 145 (721). pp. 1674-1689. ISSN: 1477-870X | doi: https://dx.doi.org/10.1002/qj.3519
- Kotthaus, S. , Halios, C. , Barlow, J. , Grimmond, C. (2018) Volume for pollution dispersion: London’s atmospheric boundary layer during ClearfLo observed with two ground-based lidar types. Atmospheric Environment , 190 pp. 401-414. ISSN: 1352-2310 | doi: https://dx.doi.org/10.1016/j.atmosenv.2018.06.042
- Gough, H. , Luo, Z. , Halios, C. , King, M. , Noakes, C. , Grimmond, C. , Barlow, J. , Hoxey, R. , Quinn, A. (2018) Field measurement of natural ventilation rate in an idealised full-scale building located in a staggered urban array: comparison between tracer gas and pressure-based methods. Building and Environment , 137 pp. 246-256. ISSN: 0360-1323 | doi: https://dx.doi.org/10.1016/j.buildenv.2018.03.055
- Gough, H. , Sato, T. , Halios, C. , Grimmond, C. , Luo, Z. , Barlow, J. , Robertson, A. , Hoxey, R. , Quinn, A. (2018) Effects of variability of local winds on cross ventilation for a simplified building within a full-scale asymmetric array: overview of the Silsoe field campaign. Journal of Wind Engineering and Industrial Aerodynamics , 175 pp. 408-418. ISSN: 0167-6105 | doi: https://dx.doi.org/10.1016/j.jweia.2018.02.010
- Halios, C. and Barlow, J. (2018) Observations of the morning development of the urban boundary layer over London, UK, taken during the ACTUAL project. Boundary-Layer Meteorology , 166 (3). pp. 395-422. ISSN: 0006-8314 | doi: https://dx.doi.org/10.1007/s10546-017-0300-z
- King, M. , Khan, A. , Delbosc, N. , Gough, H. , Halios, C. , Barlow, J. , Noakes, C. (2017) Modelling urban airflow and natural ventilation using a GPU-based lattice-Boltzmann method. Building and Environment , 125 pp. 273-284. ISSN: 0360-1323 | doi: https://dx.doi.org/10.1016/j.buildenv.2017.08.048
- Barlow, J. , Best, M. , Bohnenstengel, S. , Clark, P. , Grimmond, S. , Lean, H. , Christen, A. , Emeis, S. , Haeffelin, M. , Harman, I. , Lemonsu, A. , Martilli, A. , Pardyjak, E. , Rotach, M. , Ballard, S. , Boutle, I. , Brown, A. , Cai, X. , Carpentieri, M. , Coceal, O. , Crawford, B. , Di Sabatino, S. , Dou, J. , Drew, D. , Edwards, J. , Fallmann, J. , Fortuniak, K. , Gornall, J. , Gronemeier, T. , Halios, C. , Hertwig, D. , Hirano, K. , Holtslag, A. , Luo, Z. , Mills, G. , Nakayoshi, M. , Pain, K. , Schlünzen, K. , Smith, S. , Soulhac, L. , Steeneveld, G. , Sun, T. , Theeuwes, N. , Thomson, D. , Voogt, J. , Ward, H. , Xie, Z. , Zhong, J. (2017) Developing a research strategy to better understand, observe, and simulate urban atmospheric processes at kilometer to subkilometer scales. Bulletin of the American Meteorological Society , 98 (10). pp. ES261-ES264. ISSN: 1520-0477 | doi: https://dx.doi.org/10.1175/BAMS-D-17-0106.1
- King, M. , Gough, H. , Halios, C. , Barlow, J. , Robertson, A. , Hoxey, R. , Noakes, C. (2017) Investigating the influence of neighbouring structures on natural ventilation potential of a full-scale cubical building using time-dependent CFD. Journal of Wind Engineering and Industrial Aerodynamics , 169 pp. 265-279. ISSN: 0167-6105 | doi: https://dx.doi.org/10.1016/j.jweia.2017.07.020
- Kent, C. , Grimmond, S. , Barlow, J. , Gatey, D. , Kotthaus, S. , Lindberg, F. , Halios, C. (2017) Evaluation of urban local-scale aerodynamic parameters: implications for the vertical profile of wind speed and for source areas. Boundary-Layer Meteorology , 164 (2). pp. 183-213. ISSN: 0006-8314 | doi: https://dx.doi.org/10.1007/s10546-017-0248-z
- Helfter, C. , Tremper, A. , Halios, C. , Kotthaus, S. , Bjorkegren, A. , Grimmond, C. , Barlow, J. , Nemitz, E. (2016) Spatial and temporal variability of urban fluxes of methane, carbon monoxide and carbon dioxide above London, UK. Atmospheric Chemistry and Physics , 16 (16). pp. 10543-10557. ISSN: 1680-7316 | doi: https://dx.doi.org/10.5194/acp-16-10543-2016
- Crilley, L. , Bloss, W. , Yin, J. , Beddows, D. , Harrison, R. , Allan, J. , Young, D. , Flynn, M. , Williams, P. , Zotter, P. , Prevot, A. , Heal, M. , Barlow, J. , Halios, C. , Lee, J. , Szidat, S. , Mohr, C. (2015) Sources and contributions of wood smoke during winter in London: assessing local and regional influences. Atmospheric Chemistry and Physics , 15 pp. 3149-3171. ISSN: 1680-7316 | doi: https://dx.doi.org/10.5194/acp-15-3149-2015
- Visser, S. , Slowik, J. , Furger, M. , Zotter, P. , Bukowiecki, N. , Dressler, R. , Flechsig, U. , Appel, K. , Green, D. , Tremper, A. , Young, D. , Williams, P. , Allan, J. , Herndon, S. , Williams, L. , Mohr, C. , Xu, L. , Ng, N. , Detournay, A. , Barlow, J. , Halios, C. , Fleming, Z. , Baltensperger, U. , Prévôt, A. (2015) Kerb and urban increment of highly time-resolved trace elements in PM10, PM2.5 and PM1.0 winter aerosol in London during ClearfLo 2012. Atmospheric Chemistry and Physics , 15 (5). pp. 2367-2386. ISSN: 1680-7316 | doi: https://dx.doi.org/10.5194/acp-15-2367-2015
- Bradley, S. , Barlow, J. , Lalley, J. , Halios, C. (2015) A sodar for profiling in a spatially inhomogeneous urban environment. Meteorologische Zeitschrift , 24 (6). pp. 615-624. ISSN: 0941-2948 | doi: https://dx.doi.org/10.1127/metz/2015/0657
- Visser, S. , Slowik, J. , Furger, M. , Zotter, P. , Bukowiecki, N. , Canonaco, F. , Flechsig, U. , Appel, K. , Green, D. , Tremper, A. , Young, D. , Williams, P. , Allan, J. , Coe, H. , Williams, L. , Mohr, C. , Xu, L. , Ng, N. , Nemitz, E. , Barlow, J. , Halios, C. , Fleming, Z. , Baltensperger, U. , Prévôt, A. (2015) Advanced source apportionment of size-resolved trace elements at multiple sites in London during winter. Atmospheric Chemistry and Physics , 15 (19). pp. 11291-11309. ISSN: 1680-7316 | doi: https://dx.doi.org/10.5194/acp-15-11291-2015
- Barlow, J. , Halios, C. , Lane, S. , Wood, C. (2015) Observations of urban boundary layer structure during a strong urban heat island event. Environmental Fluid Mechanics , 15 (2). pp. 1567-7419. ISSN: 1567-7419 | doi: https://dx.doi.org/10.1007/s10652-014-9335-6
- Bohnenstengel, S. , Belcher, S. , Aiken, A. , Allan, J. , Allen, G. , Bacak, A. , Bannan, T. , Barlow, J. , Beddows, D. , Bloss, W. , Booth, A. , Chemel, C. , Coceal, O. , Di Marco, C. , Dubey, M. , Faloon, K. , Fleming, Z. , Furger, M. , Gietl, J. , Graves, R. , Green, D. , Grimmond, C. , Halios, C. , Hamilton, J. , Harrison, R. , Heal, M. , Heard, D. , Helfter, C. , Herndon, S. , Holmes, R. , Hopkins, J. , Jones, A. , Kelly, F. , Kotthaus, S. , Langford, B. , Lee, J. , Leigh, R. , Lewis, A. , Lidster, R. , Lopez-Hilfiker, F. , McQuaid, J. , Mohr, C. , Monks, P. , Nemitz, E. , Ng, N. , Percival, C. , Prévôt, A. , Ricketts, H. , Sokhi, R. , Stone, D. , Thornton, J. , Tremper, A. , Valach, A. , Visser, S. , Whalley, L. , Williams, L. , Xu, L. , Young, D. , Zotter, P. (2015) Meteorology, air quality, and health in London: the ClearfLo project. Bulletin of the American Meteorological Society , 96 (5). pp. 779-804. ISSN: 1520-0477 | doi: https://dx.doi.org/10.1175/BAMS-D-12-00245.1
- Halios, C. , Helmis, C. , Flocas, H. , Nyeki, S. , Assimakopoulos, D. (2012) On the variability of the surface environment response to synoptic forcing over complex terrain: a multivariate data analysis approach. Meteorology and Atmospheric Physics , 118 (3-4). pp. 107-115. ISSN: 1436-5065 | doi: https://dx.doi.org/10.1007/s00703-012-0209-5
- Nyeki, S. , Halios, C. , Baum, W. , Eleftheriadis, K. , Flentje, H. , Gröbner, J. , Vuilleumier, L. , Wehrli, C. (2012) Ground-based aerosol optical depth trends at three high-altitude sites in Switzerland and Southern Germany from 1995–2010. Journal of Geophysical Research , 117 ISSN: 0148-0227 | doi: https://dx.doi.org/10.1029/2012JD017493
- Halios, C. , Helmis, C. , Eleftheriadis, K. , Flocas, H. , Assimakopoulos, V. (2009) A comparative study of the main mechanisms controlling indoor air pollution in residential flats. Water Air and Soil Pollution , 204 (1-4). pp. 333-350. ISSN: 0049-6979 | doi: https://dx.doi.org/10.1007/s11270-009-0048-2
- Halios, C. , Santamouris, M. , Helmis, A. , Kapsalaki, M. , Saliari, M. , Spanou, A. , Tsakos, D. (2009) Exposure to fine particulate matter in ten night clubs in Athens Greece: studying the effect of ventilation, cigarette smoking and resuspension. Science of the Total Environment , 407 (17). pp. 4894-4901. ISSN: 0048-9697 | doi: https://dx.doi.org/10.1016/j.scitotenv.2009.02.023