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Environment PDF File
  • Updated 25 days ago

    PM2.5 map and exposure data

    This report contains an introduction to PM2.5­, summarises our current understanding of PM2.5 concentrations and exposure, discusses the findings of research undertaken by the GLA and TfL into the extent of PM2.5 pollution in London, and assesses the potential for meeting World Health Organisation guidelines by 2030. Our analysis found that at present all Londoners are exposed to concentrations higher than WHO air quality guidelines, bu...
  • Updated a month ago

    Green roofs in the Central Activities Zone

    Overview An updated spatial data set for existing green roofs has been produced for London's Central Activities Zone (CAZ) using 2015 aerial imagery. The CAZ makes up around two per cent of London's total area. Method ArcMap GIS software was used to map green roofs installations. The aerial imagery was loaded into the software in true colour (RGB) and infrared (IR) composites, along with the CAZ boundary and London 500x500m Ordnance ...
  • Updated a month ago

    Annual London Survey 2000 - 2011

    This dataset contains the topline results from the Annual London Surveys undertaken between 2000 and 2011 (there was no survey was 2008). Responses for these surveys were collected by conducting approximately 1,400 face-to-face interviews (exact numbers vary year on year) in respondents’ homes. From 2014 onwards the Annual London Survey has been delivered by Talk London, City Hall’s online research community. The results for these surv...
  • Updated a month ago

    Mortality Risk from High Temperatures in London (Triple Jeopardy Mapping)

    A heatwave refers to a prolonged period of unusually hot weather. While there is no standard definition of a heatwave in England, the Met Office generally uses the World Meteorological Organization definition of a heatwave, which is "when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5°C, the normal period being 1961-1990". They are common in the northern and southern hemisph...
  • Updated a month ago

    London Heat Map

    The Decentralised Energy Master planning programme (DEMaP), was completed in October 2010. It included a heat mapping support package for the London boroughs to enable them to carry out high resolution heat mapping for their area. To date, heat maps have been produced for 29 London boroughs with the remaining four boroughs carrying out their own data collection. All of the data collected through this process is also shown on the intera...
  • Updated 8 months ago

    Analysing Air Pollution Exposure in London

    Updated in Februrary 2017. Air quality in London has improved in recent years as a result of policies to reduce emissions, primarily from road transport. However, recently updated maps of pollution concentrations for 2013 (LAEI 2013) still show significant areas of exceedances of the annual mean NO2 EU Limit Values. Improvements are planned to address these, as recently announced in the Mayor’s package of air quality measures. The U...
  • Updated 9 months ago

    London’s Urban Heat Island - During A Warm Summer

    For an urban heat island map during an average summer see this dataset. A heatwave refers to a prolonged period of unusually hot weather. While there is no standard definition of a heatwave in England, the Met Office uses the World Meteorological Organization definition of a heatwave, which is "when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5°C, the normal period being 1...
  • Updated 9 months ago

    London's Urban Heat Island - Average Summer

    For an urban heat island map during a warm summer see this dataset. This map shows the results of an ‘UrbClim’ simulation for the mean temperature at midnight during the summer of 2011 (May to September) at a resolution of 250m. This summer has been selected as a typical summer for a West-European city. On average, the night-time temperature is approximately 4°C higher in the city centre. During some hot nights, even larger effects ar...
  • Updated a year ago

    Clean Air Consultation – July 2016

    On his election in 2016, the Mayor committed to a large scale consultation on a range of actions to address poor air quality in London. Measures under consideration include implementing the Ultra Low Emission Zone (ULEZ) in 2019 rather than 2020, expanding the boundaries of the ULEZ, and introducing an Emissions Surcharge on the most polluting vehicles driving in central London from 2017. In addition the Mayor has committed to cleaning ...
  • Created 2 years ago

    Understanding Health Impacts of Air Pollution in London

    Borough Tables from Understanding the Health Impacts of Air Pollution in London report. King’s College London, commissioned by the Greater London Authority and Transport for London, have calculated the health impacts associated with the air pollutant nitrogen dioxide (NO2) in London. This new study shows that in 2010 there was the equivalent of up to 5,900 deaths across London associated with NO2 long term exposure. (Please note: thes...