Support Our Work
Video Section

Tell Me Why: We Need ‘Normals’ and Long-term Trends

Tell Me Why: We Need ‘Normals’ and Long-term Trends
Program Summary

Having trouble viewing? Watch this video on YouTube here

What is “normal” when it comes to temperature and precipitation? The definition not only varies with location and time, but it changes from decade to decade. And it’s those decadal trends that interest climate scientists like Anthony Arguez. He explains the importance of “normals” in this version of Tell Me Why, a NOAA-funded series that explains key climate concepts.

Related Content:
Tell Me Why: Climate Science Is So Important
Tell Me Why: Questions Swirl Around Climate & Tornadoes
Tell Me Why: The Climate Extremes Index Matters

Gallery

Spring Snow Cover While this has been a snowy winter, the past 50 years have shown a trend of less spring snow cover in the Northern Hemisphere.

View Gallery