R&D – Research shows that the strength of radio signals on the ground is a reliable indicator of temperature change above. Prof. Colin Price of Tel Aviv University and his team used simple radio antennae on the ground to measure radio waves broadcast by navigational transmitters around the globe, then compared information on the strength of these radio signals with data on temperature fluctuations in the upper atmosphere. They discovered that climate change in the upper atmosphere—caused by an abundance of greenhouse gases—may lead to a greater absorption of radio waves. Weaker signals could therefore be indicative of greater climate change. more> http://tinyurl.com/mrpvbtn
Posted in EARTH WATCH, Economy, Energy & emissions, Nature, Science, Technology
Tagged Antenna (radio), Climate change, Greenhouse gas, Industrial economy, Physics, Radio, Technology, Tel Aviv University
R&D Mag – The warmer the air, the more water can evaporate: a simple relationship familiar to us from everyday life. Researchers from Germany and the Netherlands have now established that this is not always the case: although an increase in the greenhouse gas CO2 makes the climate warmer, it also allows less water to evaporate.
“We wanted to know how the foreseeable rise in CO2 would affect cloud formation in temperate climate zones and what part the vegetation plays in this,” says Jordi Vilà-Guerau de Arellano from the University of Wageningen in the Netherlands. Working with colleagues from the Max Planck Institutes for Chemistry and Meteorology, the geophysicists made use of, for the first time, a computer model that takes account of the soil, water cycle, atmosphere and growth processes of plants. The model results highlight how local and daily variable processes, through turbulence, can influence the atmosphere on larger scales. more> http://tinyurl.com/bllvx32
Posted in EARTH WATCH, Energy & emissions, Science
Tagged Carbon dioxide, Climate change, Ecology, Germany, Greenhouse gas, Max Planck Society, Meteorology, Netherlands, Wageningen University and Research Centre
Per capita anthropogenic greenhouse gas emissions by country for the year 2000 including land-use change. (Photo credit: Wikipedia)
Reuters Point Carbon – California‘s seventh-largest city may try to bolster its strained budget by maintaining its 393,000-tree urban forest and selling carbon credits to regulated greenhouse gas emitters in the state’s forthcoming cap-and-trade program.
Planting and maintaining forests in urban areas is one of four ways emitters can offset their greenhouse gas output, according to California’s cap-and-trade regulations. more> http://tinyurl.com/bv5e5ym
R&D Mag – The least expensive way for the Western United States to reduce greenhouse gas emissions enough to help prevent the worst consequences of global warming is to replace coal with renewable and other sources of energy that may include nuclear power, according to a new study by University of California, Berkeley (UC Berkeley) researchers.
“Decarbonization of the electric power sector is critical to achieving greenhouse gas reductions that are needed for a sustainable future,” said Daniel Kammen, Distinguished Professor of Energy in UC Berkeley’s Energy and Resources Group. “To meet these carbon goals, coal has to go away from the region.” more> http://is.gd/PN0ohW
Posted in EARTH WATCH, Economy, Energy & emissions
Tagged Climate change, Daniel Kammen, Earth, Ecology, Effects of global warming, Greenhouse gas, Nuclear power, University of California, University of California Berkeley, Western United States
R&D Mag – A new NASA study underscores the fact that greenhouse gases generated by human activity—not changes in solar activity—are the primary force driving global warming.
The study offers an updated calculation of the Earth’s energy imbalance, the difference between the amount of solar energy absorbed by Earth’s surface and the amount returned to space as heat. The researchers’ calculations show that, despite unusually low solar activity between 2005 and 2010, the planet continued to absorb more energy than it returned to space.
The calculated value of the imbalance (0.58 W of excess energy per square meter) is more than twice as much as the reduction in the amount of solar energy supplied to the planet between maximum and minimum solar activity (0.25 W per square meter). more> http://is.gd/RMiIa8
Posted in EARTH WATCH, Energy & emissions, Nature, Science
Tagged Earth, Energy, Global warming, Greenhouse gas, NASA, Physics, Solar energy, Solar variation