September 1, 2009

 The Sun is the main source of power for the Earth's climate machine. Space-based measurements, begun in 1978, indicate Earth receives an average of 1,361 W/m<sup>2</sup> of incoming sunlight, and the amount varies by about one-tenth of a percent over the course of the 11-year solar cycle. 

August 25, 2016

Understanding the Pacific Decadal Oscillation (PDO) as multiple layers of ice cream.  And how is it related to the El Niño-Southern Oscillation?  

January 8, 2016

Was El Niño to blame for the above-average temperatures during November and December 2015?  As always, the answer is not that simple.  

This short video, adapted from NOVA, explains how Earth's position relative to the Sun might be responsible for the dramatic shift in the climate of what is now the Saharan nation of Djibouti.

This animated visualization of precession, eccentricity, and obliquity is simple and straightforward and provides text explanations. It is a good starting place to show Milankovitch cycles.