Data can be passed to the package using Numpy arrays or a Pandas DataFrame. Air quality depends inter alia on wind direction, and many types of pollution wind- roses are to be found in the literature (Emslie, 1964), (Marsh and Foster, 1967), (Buchan and Charlson, 1968). A line showing the probability that the wind directions is from a particular wind sector is also shown. This paper describes a method of drawing pollution wind-roses: data from Ottawa, Canada, are used for purposes of illustration. These points must be kept in mind while assessing air pollution using wind roses. If TRUE each wind direction segment of a pollution rose is normalised to equal one. Munn (1969) declared that wind direction determines the quality of air and pollution, and wind roses are helpful for detecting the pollution in air, and also explained that winds are lighter during the night than during the day and in summer as compared to winter. See drawOpenKey for fine control of the scale key. This is useful for showing how the concentrations (or other parameters) contribute to each wind sector when the proprtion of time the wind is from that direction is low. It can also be used to describe air quality pollution sources. Windrose. openair comes with a dataset 'mydata', which provides several years of air pollution data from a site in London. Napier (2008) Wind Direction Bias in Generating Wind Roses and Conducting Sector-Based Air Dispersion Modeling, Journal of the Air & Waste Management Association, 58:7, 913-918. Lakes Environmental WRPLOT View is a fully operational wind rose freeware program for your meteorological data providing frequency analysis, visual wind rose plots, and generates wind rose statistics for several meteorological data formats. windRose: Traditional wind rose plot and pollution rose variation ... Droppo, J.G. The openair project » Examples of usage » Wind and pollution roses. Wind roses and pollution roses are the 'bread and butter' of air pollution analysis, but it is surprisingly difficult to find software to produce these plots properly. and B.A. The wind rose tool uses Matplotlib as a backend. See Also . A wind rose is a graphic tool used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location. See polarFreq for a more flexible version that …