New activity/unrest was observed at 4 volcanoes from April 16 - April 22, 2014. Ongoing activity was reported for 10 volcanoes.New activity/unrest: Merapi, Central Java (Indonesia)  | Popocatépetl, Mexico  | Shishaldin, Fox Islands (USA)  | Tungurahua, EcuadorOngoing activity: Chirinkotan, Kuril Islands (Russia)  | Chirpoi, Kuril Islands (Russia)  | Dukono, Halmahera (Indonesia)  | Fuego, Guatemala  | Karymsky, Eastern Kamchatka (Russia)  | Kilauea, Hawaiian Islands (USA)  | Nishinoshima, Japan  | Shiveluch, Central Kamchatka (Russia)  | Sinabung, Indonesia  | Ubinas, PeruThe Weekly Volcanic Activity Report is a cooperative project between the Smithsonian’s Global Volcanism Program and the US … Read more » http://dlvr.it/5TFMKP

A new analysis of NASA satellite data shows Africa’s Congo rainforest, the second-largest tropical rainforest in the world, has undergone a large-scale decline in greenness over the past decade.The study, led by Liming Zhou of University at Albany, State University of New York, shows between 2000 and 2012 the decline affected an increasing amount of forest area and intensified. The research, published Wednesday in Nature, is one of the most comprehensive observational studies to explore the effects of long-term drought on the Congo rainforest using several independent satellite sensors.”It’s important to understand these changes because most climate models predict tropical forests may be under stress due to increasing severe water shortages in a warmer and drier 21st c… Read more » http://dlvr.it/5TCyVv

A team of university scientists and a NASA colleague were greatly surprised to discover an ancient tundra landscape preserved under the Greenland Ice Sheet, below 3.2 km (2 miles) of ice. ”We found organic soil that has been frozen to the bottom of the ice sheet for 2.7 million years,” said University of Vermont geologist and lead author of paper published in journal Science, Paul Bierman.”The ancient soil under the Greenland ice sheet helps to unravel an important mystery surrounding climate change,” said Dylan Rood, a co-author on the new study, from the Scottish Universities Environmental Research Centre and the University of California, Santa Barbara. “How did big ice sheets melt and grow in response to changes in temperature?”The new dis… Read more » http://dlvr.it/5T4RyQ

Researchers at the University of Central Florida’s College of Optics & Photonics and the University of Arizona are developing a new technique to aim a high-energy laser beam into clouds to make it rain or trigger lightning.They are surrounding one beam with a second one to act as an energy reservoir, sustaining the central beam to greater distances than previously possible. The secondary “dress” beam refuels and helps prevent the dissipation of the high-intensity primary beam, which on its own would break down quickly. Water condensation and lightning activity in clouds are linked to large amounts of static charged particles. Stimulating those particles with the right kind of laser holds the key to possibly one day summoning a shower when and where i… Read more » http://dlvr.it/5T1PCR