Warming climate puts wetlands more at risk to invasive species
December 10, 2014 07:55 AM - Duke University via EurekAlert.
In the battle between native and invasive wetland plants, a new Duke University study finds climate change may tip the scales in favor of the invaders -- but it's going to be more a war of attrition than a frontal assault.
"Changing surface-water temperatures, rainfall patterns and river flows will likely give Japanese knotweed, hydrilla, honeysuckle, privet and other noxious invasive species an edge over less adaptable native species," said Neal E. Flanagan, visiting assistant professor at the Duke Wetland Center, who led the research.
Sandia Labs study points to advantages of storing hydrogen in salt mines
December 9, 2014 07:59 AM - Sandia National Laboratories.
Large-scale storage of low-pressure, gaseous hydrogen in salt caverns and other underground sites for transportation fuel and grid-scale energy applications offers several advantages over above-ground storage, says a recent Sandia National Laboratories study sponsored by the Department of Energy’s Fuel Cell Technologies Office.
Geologic storage of hydrogen gas could make it possible to produce and distribute large quantities of hydrogen fuel for the growing fuel cell electric vehicle market, the researchers concluded.
Geologic storage solutions can service a number of key hydrogen markets since “costs are more influenced by the geology available rather than the size of the hydrogen market demand,” said Sandia’s Anna Snider Lord, the study’s principal investigator.
Will more use of natural gas minimize or exacerbate climate change?
December 8, 2014 03:46 PM - Carnegie Science
Natural gas power plants produce substantial amounts of gases that lead to global warming. Replacing old coal-fired power plants with new natural gas plants could cause climate damage to increase over the next decades, unless their methane leakage rates are very low and the new power plants are very efficient.
These are the principal findings of new research from Carnegie’s Ken Caldeira and Xiaochun Zhang, and Nathan Myhrvold of Intellectual Ventures that compares the temperature increases caused by different kinds of coal and natural gas power plants. Their work is published in Environmental Research Letters.
Warming streams contribute to warming Chesapeake Bay
December 8, 2014 09:19 AM - US Geological Survey
The majority of streams in the Chesapeake Bay region are warming, and that increase appears to be driven largely by rising air temperatures. These findings are based on new U.S. Geological Survey research published in the journal Climatic Change.
Researchers found an overall warming trend in air temperature of 0.023 C (0.041 F) per year, and in water temperature of 0.028 C (0.050 F) per year over 51 years. This means that air temperature has risen 1.1 C (1.98 F), and water temperature has risen 1.4 C (2.52 F) between 1960 and 2010 in the Chesapeake Bay region.
The link between greenhouse gasses and African rainfall
December 5, 2014 08:58 AM - NCAR
New research demonstrates for the first time that an increase in greenhouse gas concentrations thousands of years ago was a key factor in causing substantially more rainfall in two major regions of Africa. The finding provides new evidence that the current increase in greenhouse gases will have an important impact on Africa’s future climate.
The study, led by the National Center for Atmospheric Research (NCAR), is being published this week in Science.
The critical role crops play in the Earth's CO2 cycle
December 4, 2014 01:13 PM - Kelly April Tyrrell, University of Wisconsin - Madison.
Each year, the planet balances its budget. The carbon dioxide absorbed by plants in the spring and summer as they convert solar energy into food is released back to the atmosphere in autumn and winter. Levels of the greenhouse gas fall, only to rise again.
But the budget has gotten bigger. Over the last five decades, the magnitude of this rise and fall has grown nearly 50 percent in the Northern Hemisphere, as the amount of the greenhouse gas taken in and released has increased. Now, new research shows that humans and their crops have a lot to do with it, highlighting the profound impact people have on the Earth’s atmosphere.
O Christmas Tree, O Christmas Tree
December 3, 2014 10:18 AM - Allison Winter, ENN
The tradition of the Capitol Christmas Tree, or The People’s Tree, began in 1964 when Speaker of the U.S. House of Representatives John W. McCormack (D-MA) placed a live Christmas tree on the Capitol lawn. This tree lived three years before succumbing to wind and root damage. In 1970, the Capitol Architect asked the U.S. Forest Service to provide a Christmas tree. Since then, a different national forest has been chosen each year to provide The People’s Tree. This national forest also works with state forests to provide companion trees that are smaller Christmas trees for offices in Washington, D.C.
This year, the 88-foot-tall white spruce tree was harvested from the Chippewa National Forest in northeastern Minnesota by Jim Scheff who won the Logger of the Year award from the Sustainable Forestry Initiative Inc. (SFI).
That begs the question how can a logger win an award from a sustainability group?
UK considers sustainable aviation fuel
December 2, 2014 12:57 PM - ClickGreen Staff, ClickGreen
A coalition of the UK’s airlines, airports, manufacturers and air navigation service provider NATS, has launched its latest industry road map, which considers the opportunities for sustainable aviation fuels. The Sustainable Aviation (SA) research identifies the potential for a 24 per cent reduction in aviation carbon dioxide emissions by 2050 and the generation of £265 million in economic value plus the creation of 4,400 jobs in the UK over the next 15 years.
New study links carbon emissions and climate warming
December 2, 2014 07:44 AM - University of Southampton via ScienceDaily.
Research has identified, for the first time, how global warming is related to the amount of carbon emitted.
”čA team of researchers from the universities of Southampton, Bristol and Liverpool have derived the first theoretical equation to demonstrate that global warming is a direct result of the build-up of carbon emissions since the late 1800s when human-made carbon emissions began. The results are in accord with previous data from climate models.
The theoretical equation reveals the complex relationship between carbon dioxide levels and the ocean system. Burning fossil fuels increases atmospheric carbon dioxide levels leading to global warming and the greenhouse effect, which is partly offset by the oceans taking in both heat and carbon.
What Drives the Global Warming Debate?
December 1, 2014 12:09 PM - Michigan State University
Scientists have presented the most comprehensive evidence to date that climate extremes such as droughts and record temperatures are failing to change people’s minds about global warming. Instead, political orientation is the most influential factor in shaping perceptions about climate change, both in the short-term and long-term, said Sandra Marquart-Pyatt, a Michigan State University sociologist and lead investigator on the study.