Wisconsin, USA · 2002–2025 · June-August
Is the air over Wisconsin getting smokier?
Summer aerosol optical depth, 2002-2025
Tidemark · Read the marks Earth leaves
Ask a question about how Earth is changing.
Choose a place and time. See what changed, how strong the evidence is, and what to check next.
Quick starts
What would you like to find out?
Is it getting hotter or colder?Average air temperature, year by yearIs it getting wetter or drier?Average daily rainfallIs the land drying out?How wet the soil is where roots growIs the air getting hazier?Haze from smoke, dust and pollution (AOD)Is it getting cloudier or sunnier?How much of the sky is covered by cloudIs it getting windier?Average wind speed 10 m above ground
Worked examples · available offline
Start with a case file
Klang Valley, Malaysia · 1990–2025 · Whole year
Is rainfall changing in the Klang Valley?
Average daily rainfall, Malaysia, 1990-2025
Iowa, USA · 1981–2025 · June-August (growing season)
Is the land getting drier in Iowa?
Root-zone soil wetness in the growing season, 1981-2025