Taxonomy term

december 2012

Satellites can detect underground nuclear explosions

SAN FRANCISCO: If you’re looking for hints of an underground nuclear explosion, the last place you might think to look is up. But it turns out that the sky is a great place to look for clues, because satellites provide scientists with a way to locate the waves that clandestine weapons tests emit into the upper atmosphere, scientists announced yesterday.

05 Dec 2012

Benchamrks: December 4, 1992: The Seattle Fault Zone is described

Since the early 1900s, scientists, boaters and residents have known that a ghostly, submerged forest of dead trees lurked just below the surface of Lake Washington, on Seattle’s eastern edge. The trees were mostly too deep to bother anyone until the Lake Washington Ship Canal opened in 1916, connecting the lake and Puget Sound and dropping the level of the lake three meters. Then the dead trees — many of which were still upright — became hazardous to boaters. In response, the U.S. Coast and Geodetic Survey and U.S. Army Corps of Engineers blasted and chained down 186 trees in one submerged forest. Forty years later, when a diver visited a different underwater forest in 28 meters of water, he found himself in a dense grove of dead trees — predominately Douglas fir — the largest of which had a circumference of 9 meters. 
04 Dec 2012

Simple organic compounds detected by Curiosity on Mars

Too early to tell if findings are evidence of biological activity, scientists say

NASA’s Mars Science Laboratory (MSL) rover, Curiosity, has detected evidence of simple, chlorinated organic compounds in soil sampled recently from the red planet, project scientists announced Monday from the annual meeting of the American Geophysical Union in San Francisco. The scientists characterized the finding as very exciting, but they stressed that the results do not provide “definitive" evidence of past or present life on Mars.

03 Dec 2012

Where on Earth? - December 2012

Clues for December 2012:
1. Sitting atop a subduction zone where the Pacific Plate dips beneath the Okhotsk Plate, this active andesitic stratovolcano is one of about 40 that forms part of a historically disputed island chain stretching more than 1,000 kilometers between two countries.
2. Eruptions of the volcano, which is nearly 1,500 meters high and features a 3- to 3.5-kilometer wide caldera, have been recorded since the 18th century.

Highlights of 2012: Climate 2012 - A window into what to expect for 2013 and beyond?

July 2012 was the hottest month by far for the lower 48 states. Much of the nation faced drought conditions that grew steadily worse throughout the summer, and there were major repercussions for crop yields and food prices. Wildfires were also rampant. The record low snowpack in May 2012 in the Colorado Rockies set the stage for major wildfires in June, with more than 600 homes lost in Colorado alone. Wildfires developed in other regions in July as well, as tremendous record-breaking heat developed in Oklahoma and surrounding areas. Considered individually, the record temperatures, droughts, fires and diminished snowpack are not necessarily alarming and may not signal anything beyond the natural occurrence of a hotter-than-average year. But combined, these indicators are much more significant from a climate standpoint. They highlight that there is more than just natural variability playing a role: Global warming has reared its head in a way that can only be a major warning for the future. So, what can we expect?

25 Nov 2012

Increasing resilience: A national imperative

Over the past several years, the concept of resilience has increasingly captured public attention. Even fitness clubs are advertising resilience to get you in the best shape of your life — able to handle anything that comes your way. The same resiliency that helps individuals — being mentally, physically and financially prepared, and having a disaster-recovery plan — applies to communities and even to nations. In August, a committee of the National Resource Council (NRC) of the National Academies released a report in which the authors looked at how communities can increase their resilience to natural disaster. The committee outlined a plan for becoming more resilient over the next two decades, but that work must begin today.

18 Nov 2012

Sun provides water to the moon?

Until recently, the consensus in the scientific community was that the moon was bone-dry. Scientists thought that the massive impact responsible for the moon’s creation would have driven away the hydrogen needed to form water. In the past four years, however, that view has melted away. The first suggestion of water was in 2008, when researchers identified the presence of water in volcanic lunar glass. In 2009, satellites orbiting high above the moon identified water on its surface.

14 Oct 2012