Polar Annulus

Choose your options below and as you select each one, the other options will update themselves. If help text is available for each input, click the "help" link on the side.
Select a site by clicking on it.
Site name

Select a site by clicking on it. This tool has been restricted to plotting one site at a time.

Select a variable by clicking on it.
Variables

Select a variable by clicking on it. The pollutants available will depend on the selections of other parameters (e.g. site and date range selected). This tool is restricted to plotting one pollutant at a time.

Date Range
Choose to enter either 'Specific Dates' or 'Specific Years'.
Date Range

Choose to enter either 'Specific Dates' or 'Specific Years'. 'Specific Dates' allow you to choose day, month and year to start and stop your analysis. 'Specific Years' will allow you to quickly choose the years of interest to you and the analysis will commence on 1st January and run until 31st December of those selected years.

Date period available
01/08/2010 - 12/12/2018
Period

Select a Period option to control how the time series is presented along the radius of the plot. 'Default' produces a plot showing the diurnal variation by hour of the day and wind direction which can for example highlight a road traffic source. 'Weekday' will plot variation by day of the week so is helpful in highlighting differences throughout the working week and weekends. Selecting 'Season' will bin the data into proper seasons showing the trend across seasons. 'Trend' does not bin the data, instead showing variation by wind direction over the whole time series.

Colours

Select from a variety of set colour templates.