Rise in temperatures and CO2 follow each other closely in climate change

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ScienceDaily: Earth Science News

Rise in temperatures and CO2 follow each other closely in climate change

Posted: 23 Jul 2012 01:27 PM PDT

The greatest climate change the world has seen in the last 100,000 years was the transition from the ice age to the warm interglacial period. New research indicates that, contrary to previous opinion, the rise in temperature and the rise in the atmospheric carbon dioxide follow each other closely in terms of time.

Existence of vitamin ‘deserts’ in the ocean confirmed

Posted: 23 Jul 2012 01:26 PM PDT

Using a newly developed analytical technique was used to identify long-hypothesized vitamin B deficient zones in the ocean.

Polar bear evolution tracked climate change

Posted: 23 Jul 2012 12:10 PM PDT

A whole-genome analysis suggests that polar bear numbers waxed and waned with climate change, and that the animals may have interbred with brown bears since becoming a distinct species millions of years ago.

Ancient alteration of seawater chemistry linked with past climate change

Posted: 23 Jul 2012 10:48 AM PDT

Scientists have discovered a potential cause of Earth’s “icehouse climate” cooling trend of the past 45 million years. It has everything to do with the chemistry of the world’s oceans.

Fools’ gold found to regulate oxygen

Posted: 23 Jul 2012 07:54 AM PDT

As sulfur cycles through Earth’s atmosphere, oceans and land, it undergoes chemical changes that are often coupled to changes in other such elements as carbon and oxygen. Although this affects the concentration of free oxygen, sulfur has traditionally been portrayed as a secondary factor in regulating atmospheric oxygen, with most of the heavy lifting done by carbon. However, new findings suggest that sulfur’s role may have been underestimated.

Croscat volcano may have been the last volcanic eruption in Spain, less than 13 thousand years ago

Posted: 23 Jul 2012 06:51 AM PDT

Using Carbon-14 dating and the analysis of fossilised pollen, researchers have  confirmed that one of the youngest volcanoes of the Iberian Peninsula is the Croscat Volcano, located in the region of La Garrotxa, Girona. They verified that its last eruption took place less than 13 thousand years ago.

Traveling through a volcano: How pre-eruption collisions affect what exits a volcano

Posted: 23 Jul 2012 06:48 AM PDT

Scientists widely believe that volcanic particle size is determined by the initial fragmentation process, when bubbly magma deep in the volcano changes into gas-particle flows. But new research indicates a more dynamic process where the amount and size of volcanic ash actually depend on what happens afterward, as the particles race toward the surface.
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