Environment

07/28/2014 - 10:52

Many studies have shown the potential for global climate change to cut food supplies. But these studies have, for the most part, ignored the interactions between increasing temperature and air pollution — specifically ozone pollution, which is known to damage crops.

 

07/23/2014 - 13:12

New research from North Carolina State University shows that urban “heat islands” are slowly killing red maples in the southeastern United States. One factor is that researchers have found warmer temperatures increase the number of young produced by the gloomy scale insect – a significant tree pest – by 300 percent, which in turn leads to 200 times more adult gloomy scales on urban trees.

 

06/27/2014 - 20:47

New research has revealed the causes and warning signs of rare tsunami earthquakes, which may lead to improved detection measures.Tsunami earthquakes happen at relatively shallow depths in the ocean and are small in terms of their magnitude. However, they create very large tsunamis, with some earthquakes that only measure 5.6 on the Richter scale generating waves that reach up to ten metres when they hit the shore. 

06/17/2014 - 20:12

The Antarctic shore is a place of huge contrasts, as quiet, dark, and frozen winters give way to bright, clear waters, thick with algae and peppered with drifting icebergs in summer. But as the planet has warmed in the last two decades, massive losses of sea ice in winter have left icebergs free to roam for most of the year. As a result, say researchers reporting in the Cell Press journal Current Biology on June 16, boulders on the shallow seabed—once encrusted with a rich assemblage of species in intense competition for limited space—now mostly support a single species. The climate-linked increase in iceberg activity has left all other species so rare as to be almost irrelevant.

05/21/2014 - 06:26

The Greenland Ice Sheet experienced widespread surface melt in dry zone areas most recently in 1889 and 2012. A study conducted by scientists at Dartmouth College and the Desert Research Institute questioned the reason that dry snow didn’t melt in hotter years such as 2007 or 2010. Accordingly, the researchers hypothesized that the albedo of the snow combined with warm temperatures were responsible for the melting.

 

04/28/2014 - 08:45

In formulating policies to address greenhouse gas emissions, or evaluating the potential impact of different energy technologies on global climate change, one of the thorniest issues is how to account for the very distinctive characteristics of various different gases.