Can rain clean the atmosphere?
August 28, 2015 02:31 PM - MIT News
As a raindrop falls through the atmosphere, it can attract tens to hundreds of tiny aerosol particles to its surface before hitting the ground. The process by which droplets and aerosols attract is coagulation, a natural phenomenon that can act to clear the air of pollutants like soot, sulfates, and organic particles. Atmospheric chemists at MIT have now determined just how effective rain is in cleaning the atmosphere.
New study predicts future Antarctic ice loss
August 28, 2015 07:16 AM - British Antarctic Survey
A new international study is the first to use a high-resolution, large-scale computer model to estimate how much ice the West Antarctic Ice Sheet could lose over the next couple of centuries, and how much that could add to sea-level rise. The results paint a clearer picture of West Antarctica’s future than was previously possible. The study has been published in The Cryosphere, an open access journal of the European Geosciences Union (EGU).
“The IPCC’s [Intergovernmental Panel on Climate Change] 4th and 5th Assessment Reports both note that the acceleration of West Antarctic ice streams in response to ocean warming could result in a major contribution to sea-level rise, but that models were unable to satisfactorily quantify that response,” says Stephen Cornford, a research assistant at the University of Bristol, UK and lead-author of the study.
Dust in the Waters
August 27, 2015 12:59 PM - Jennifer Chu, MIT News Office
Each spring, powerful dust storms in the deserts of Mongolia and northern China send thick clouds of particles into the atmosphere. Eastward winds sweep these particles as far as the Pacific, where dust ultimately settles in the open ocean. This desert dust contains, among other minerals, iron — an essential nutrient for hundreds of species of phytoplankton that make up the ocean’s food base.
NASA's latest satellite data reveals global sea level rise
August 27, 2015 08:49 AM - ClickGreen Staff, ClickGreen
Global sea levels have risen nearly 3 inches in less than 25 years, with some locations around the world rising more than 9 inches, according to NASA’s latest satellite data. An intensive research effort now underway, aided by NASA observations and analysis, points to an unavoidable rise of several feet in the future.
Carbon Credits Under Kyoto Protocol Actually Increased Emissions
August 27, 2015 07:28 AM - Gina-Marie Cheeseman, Triple Pundit
At the end of November, governments will come together in Paris to hammer out agreements for a successor to the Kyoto Protocol. Under the KP, there are two greenhouse gas (GHG) emissions offsetting mechanisms: joint implementation (JI) and the Clean Development Mechanism (CDM).
JI allows countries with emissions-reduction commitments under the Kyoto Protocol to generate Emission Reduction Units (ERUs) from GHG reduction projects and transfer them to other countries. Almost 872 million ERUs had been issued under JI as of March 2015, about a third of all Kyoto offset credits. In a nutshell, JIs are carbon credits and include things like reforestation projects.
The Fingerprints of Sea Level Rise
August 26, 2015 02:49 PM - NASA Jet Propulsion Laboratory
When you fill a sink, the water rises at the same rate to the same height in every corner. That's not the way it works with our rising seas.
According to the 23-year record of satellite data from NASA and its partners, the sea level is rising a few millimeters a year -- a fraction of an inch. If you live on the U.S. East Coast, though, your sea level is rising two or three times faster than average. If you live in Scandinavia, it's falling. Residents of China's Yellow River delta are swamped by sea level rise of more than nine inches (25 centimeters) a year.
These regional differences in sea level change will become even more apparent in the future, as ice sheets melt. For instance, when the Amundsen Sea sector of the West Antarctic Ice Sheet is totally gone, the average global sea level will rise four feet. But the East Coast of the United States will see an additional 14 to 15 inches above that average.
Arctic may help remove, not add, methane
August 25, 2015 08:54 AM - Morgan Kelly, Princeton Journal Watch
In addition to melting icecaps and imperiled wildlife, a significant concern among scientists is that higher Arctic temperatures brought about by climate change could result in the release of massive amounts of carbon locked in the region’s frozen soil in the form of carbon dioxide and methane. However, new research led by Princeton University researchers and published in The ISME Journal in August suggests that, thanks to methane-hungry bacteria, the majority of Arctic soil might actually be able to absorb methane from the atmosphere rather than release it.
How a warming climate is impacting wild boar in Europe
August 23, 2015 07:54 AM - Paul Brown, The Ecologist
Increasingly mild winters have caused an abundance of acorns and beech nuts in Europe's woodlands, writes Paul Brown, triggering a wild boar population explosion - just one of the effects of warming climate on wildlife populations.
”‹Wild boar populations in Europe are getting out of control - and scientists are blaming climate change.
There are now millions of wild boar spreading out from their preferred woodland habitat, moving into city suburbs, and even crossing national boundaries to countries that had thought they were extinct.
Scientists Warn of Air Pollution Risks in West Africa
August 21, 2015 01:55 PM - University of York
New research by European and African scientists, including a team from the University of York, warns of the risks posed by the increasing air pollution over the cities of West Africa – amid fears it could have an impact on human health, meteorology and regional climate.
Is the California Drought Causing Land to Sink?
August 21, 2015 08:56 AM - Jet Propulsion Laboratory
As Californians continue pumping groundwater in response to the historic drought, the California Department of Water Resources today released a new NASA report showing land in the San Joaquin Valley is sinking faster than ever before, nearly 2 inches (5 centimeters) per month in some locations.