Geophysics

Category archives for Geophysics

Sulfur: As You Like It

Speaking of sulfur: This common element turns out to be highly useful for understanding planetary processes – both on Earth and Mars. Two new papers by Dr. Itay Halevy use sulfur chemistry to understand the history of sulfur-loving microbes at the bottom of the ocean and the compounds spewed from Martian volcanoes that may have…

Horse latitudes, doldrums, calms of Cancer and Capricorn: These are all synonymous names for the forsaken regions of the oceans that sailors of previous eras cursed because the winds that once pushed their sails die out there for weeks at a time. (One suggested explanation for the name “horse latitudes” is that some had to…

You’ve heard of the carbon cycle, maybe even the nitrogen cycle. But have you given much thought lately to the sulfur cycle? New research in last week’s Science suggests that we should be paying a bit more attention to the way this element moves through the atmosphere, biosphere, oceans and land. Over the last 500…

Earthquakes are once again in the news, this time in Mexico. Although it is only the biggest quakes that make international headlines, we might take a minute to contemplate other quakes – the ones you’ll never feel. So-called “slow” or “silent” earthquakes slip so softly they don’t even show up on regular seismographic equipment. As…