Wind Turbine Arrangement: Staggering Results
October 31, 2013 03:48 PM - Robin Blackstone, ENN
Location and organization apparently matters after all! Or at least that is what Cristina Archer, Assistant Professor at the University of Delaware has discovered with regard to wind turbine efficiency. Dr. Archer headed up a team of researchers from UD's College of Earth, Ocean and Environment to conduct studies on the effects of various wind turbine organizational placement patterns. Using a wind farm near Sweden for the basis of their study, they compared existing tightly paced, grid-like layouts to six alternate configurations. They tried multiple spacing distances in various styles of rows: straight arrays, linear but equal offsets and a staggered theatre style where any turbine in front does not obstruct the view from any one behind.
Sandy’s path of destruction felt in the Caribbean too
October 29, 2013 04:17 PM - Robin Blackstone, ENN
Last year at this time much of the United States eastern seaboard was closely monitoring Super Storm Sandy. Hour by hour people watched with horror as she blew across the Dominican Republic, Haiti, Cuba and the Bahamas ultimately charging up the Atlantic, swinging west to crash into the Mid-Atlantic states at full force. Damage to New York and New Jersey was extensive to be sure, but the larger populations and greater affluence to the north have largely overshadowed recovery of the Caribbean nations.
Mercury Sediment Carried Forth by California Floods
October 29, 2013 01:59 PM - Robin Blackstone, ENN
Mercury contamination in sediment has been a big concern in the Central Valley lowland areas of California. But associate researcher from the University of California, Michael Singer has unearthed new information and considerations utilizing modern topographic datasets and modeling to track mercury-laden sediment. Singer hypothesizes that the progradation process resulting from 10-year flooding events within the valleys below the Sierra Nevada Mountains are the key to understanding and tracking the presence of mercury. Singer has connected the mercury amalgamation process, which was used to extract gold from the mountains during the 19th century with the current high incidence of mercury in regional delta sediment.
School Bus Company Fined $33K for Excessive Idling
October 29, 2013 09:02 AM - Editor, ENN
Watch out idlers — they're coming for you! Anti-idling laws on the federal, state, and local level are rapidly growing across the US in an effort to cut back on the billions of gallons of fuel that are wasted each year by idling vehicles. While it is difficult to patrol these idlers, especially on a local level, most states have laws against idling, with California taking the lead for the most codes and regulations. The US Environmental Protection Agency (EPA) is also taking action against companies that violate federally-enforceable motor vehicle idling limits. The latest culprit - North Reading Transportation (NRT), a Methuen company that operates school buses and provides student transportation services in several Massachusetts communities.
The Ozone hole seems to be getting smaller
October 29, 2013 06:48 AM - Roger Greenway, ENN
Remember the Ozone hole? Decades ago it was a big concern. It was getting bigger and bigger and our emissions of ozone-depleting substances was identified as the main reason. It continues to get smaller as anthropogenic emissions continue to be reduced. It was slightly smaller in 2013 than average in recent decades, according to NASA satellite data. The ozone hole is a seasonal phenomenon that starts to form during the Antarctic spring (August and September). The September-October 2013 average size of the hole was 8.1 million square miles (21 million square kilometers). For comparison, the average size measured since the mid-1990s when the annual maximum size stopped growing is 8.7 million square miles (22.5 million square kilometers). However, the size of the hole in any particular year is not enough information for scientists to determine whether a healing of the hole has begun.
GM Crops Causing a Stir in Washington State, Mexico, and Hawaii
October 28, 2013 10:30 AM - Sophie Wenzlau, Worldwatch Institute
Courts, councils, and voters across North America are weighing in on genetically modified (GM) crops this month In Washington state, voters are beginning to cast ballots in favor of or opposing Initiative 522, which would mandate that all GM food products, seeds, and seed stocks carry labels in the state.
Kazakhstan nuclear test site clean up success
October 27, 2013 08:32 AM - Paul Lowe / Panos, SciDevNet
A Soviet-era nuclear test site in Kazakhstan was cleaned up through a collaborative international project that could provide lessons for tackling other dangerous nuclear sites across the globe, a report reveals. The report, entitled 'Plutonium Mountain', documents how international scientific cooperation was important for securing nuclear waste from the site. It was released in August by the Belfer Center for Science and International Affairs at Harvard University, United States. The Semipalatinsk test site, which spans an area about the size of Belgium, lies in a remote part of eastern Kazakhstan. It embodied the post-Cold War risk of 'loose nukes' -- the threat that terrorists or rogue states could obtain nuclear fissile materials — according to the report.
Arctic warming confirmed to be unprecedented
October 26, 2013 09:43 AM - Roger Greenway, ENN
The earth's climate is changing. Temperatures are trending higher. Scientists want to know if this trend is part of a natural cycle, augmented by man's use of fossil fuels. The Arctic region is a good place to look for clues. Average summer temperatures in the Eastern Canadian Arctic during the last 100 years are higher now than during any century in the past 44,000 years and perhaps as long ago as 120,000 years, says a new University of Colorado Boulder study. The study is the first direct evidence that the present warmth in the Eastern Canadian Arctic exceeds the peak warmth there in the Early Holocene, when the amount of the sun’s energy reaching the Northern Hemisphere in summer was roughly 9 percent greater than today, said CU-Boulder geological sciences Professor Gifford Miller, study leader. The Holocene is a geological epoch that began after Earth's last glacial period ended roughly 11,700 years ago and which continues today.
India blocks progress on HFC emissions reductions
October 25, 2013 05:05 PM - Oliver Tickell, The Ecologist
The Indian Government has single-handedly blocked progress on an agreement to reduce emissions of the super-powerful greenhouse gases known as hydrofluorocarbons (HFCs). The G20 - which includes India as the world's tenth largest economy - resolved in September to phase down the consumption and production of HFCs under the Montreal Protocol, the international treaty which has successfully slashed emissions of ozone eating CFCs. But in the 25th meeting of the Montreal Protocol in Bangkok, which ended today, India deliberately blocked detailed discussions of the HFC-reduction proposals.
The Abundance of Invasive Species
October 25, 2013 04:05 PM - Robin Blackstone, ENN
Recognizing that invasive species are major catalysts for environmental change, researchers from the University of Wisconsin—Madison are relooking at how we account for invasive species populations. Instead of researching the behaviors and habits of the invasive species, researchers Gretchen Hansen and Jake Vander Zanden are considering abundance distributions of invasive species. They hypothesize that measuring abundance in an area is a more helpful determinate for defining the most optimal methods of prevention, containment, control and eradication.