Air Quality & Weather Timeline

Daily PM2.5, temperature, and wind speed on a shared timeline, with regional sampling density broken out across totals, years, and months.

Time Span
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Unique dates represented in the daily series.
Average PM2.5
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Mean level across all recorded observations.
Average Daily Coverage
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Average number of regions sampled each day.
Regional Reading Gap
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Difference between the most and least sampled regions.
What this dashboard highlights

The shared timeline below uses aligned panels so pollution, temperature, and wind can be compared without one scale overpowering another. The frequency views then move from broad totals to year-level comparisons and month-level coverage, making it easier to spot where collection is steady versus thinner.

    Shared daily timeline for PM2.5, temperature, and wind speed
    Faint lines show daily means; bold lines show 30-day rolling averages for a cleaner multi-year comparison.
    Total reading frequency by region
    A fast view of which regions contribute the densest sample volume over the full period.
    Region frequency by year
    Grouped bars separate the two years so changes in collection intensity are easy to compare region by region.
    Monthly sampling completeness
    Each bar compares observed region-day readings with the maximum possible if all regions were recorded every day of the month.
    Monthly reading density heatmap by region
    The heatmap makes dense versus sparse sampling visible at the month-region level in one compact view.
    PM2.5 versus temperature, colored by wind speed
    This relationship view complements the timeline by showing whether higher pollution readings cluster with particular weather conditions.
    Region summary table
    Region Total readings Share of all readings Days covered Avg PM2.5 Avg temperature Avg wind speed