Global warming has forced alpine chipmunks in Yosemite to higher ground, prompting a startling decline in the species' genetic diversity, according to a new study by researchers at the University of California, Berkeley.

New clues as to how Earth's remote ecosystems have been influenced by the industrial revolution are locked, frozen in the ice of glaciers. That is the finding of a group of scientists, including Robert Spencer of the Woods Hole Research Center. The research will be published in the March 2012 issue of Nature Geoscience.

Thawing permafrost will have far-reaching ramifications for populated areas, infrastructure and ecosystems. A geographer from the University of Zurich reveals where it is important to confront the issue based on new permafrost maps -- the most precise global maps around. They depict the global distribution of permafrost in high-resolution images and are available on Google Earth.

The height of a forest is important in a number of different ways. First the taller a forest, the more likely there are important niche habitats in the canopy providing homes to unique species. In addition, a forests' height says something about its ability to sequester carbon: the taller a forest the more carbon it can hold. Now a team of researchers, led by NASA, has created the world's first global map showing the height of the world's forests (click here for interactive map), publishing their findings in the Journal of Geophysical Research.

Animal and insect species in Europe are losing the fight to keep up with rapid changes in climate in a new phenomenon dubbed "climatic debt", according to an international study.

More than 11,000 bird and butterfly species were analysed over 20 years by scientists in the largest study of its kind. Releasing some of the data for the first time, scientists reveal how species are failing to keep up as warmer temperatures move north. The findings saw birds lag behind their normal climate zones, on average by 212 kilometres and butterflies by 135km.

More than one third of the counties in the United States could face a "high" or "extreme" risk of water shortage due to climate change by 2050, according to a study published Wednesday.

The new study, carried in the Journal of Environmental Science & Technology, also concluded that 70 percent of the more than 3,100 U.S. counties could face "some" risk of shortage of fresh water for drinking, farming and other uses.

KNOXVILLE—Electric cars have been heralded as environmentally friendly, but findings from University of Tennessee, Knoxville, researchers show that electric cars in China have an overall impact on pollution that could be more harmful to health than gasoline vehicles.

Climate change spells trouble for many tropical birds – especially those living in mountains, coastal forests and relatively small areas – and the damage will be compounded by other threats like habitat loss, disease and competition among species.

That is among the conclusions of a review of nearly 200 scientific studies relevant to the topic. The review was scheduled for online publication this week in the journal Biological Conservation by Çağan Şekercioğlu , an assistant professor of biology at the University of Utah.

Last year the Arctic, which is warming faster than anywhere else on Earth due to global climate change, experienced its warmest twelve months yet. According to recent data by NASA, average Arctic temperatures in 2011 were 2.28 degrees Celsius (4.1 degrees Fahrenheit) above those recorded from 1951-1980. As the Arctic warms, imperiling its biodiversity and indigenous people, researchers are increasingly concerned that the region will hit climatic tipping points that could severely impact the rest of the world. A recent commentary in Nature Climate Change highlighted a number of tipping points that keep scientists awake at night.

According to new research by MIT, climate change could make events like last year’s Hurricane Irene happen every three to 20 years, instead of once a century.

The group simulated trends of thousands of storms under different climate conditions and found that today’s “500-year floods” could occur once every 25 to 240 years.