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Rayleigh Jet Technique Proves to be Best for Marine Cloud Brightening

Marine Cloud Brightening is a reversible geoengineering method proposed to mitigate rising global temperatures. It relies on propelling a fine mist of salt particles high into the atmosphere to increase the albedo of clouds - the amount of sunlight they reflect back into space. This would then reduce temperatures on the surface, as less sunlight reaches the Earth.

18 Dec 2014

Paleocene-Eocene Thermal Maximum Could Provide Clues to Future of Modern Climate Change

The rate at which carbon emissions warmed Earth's climate almost 56 million years ago resembles modern, human-caused global warming much more than previously believed, but involved two pulses of carbon to the atmosphere, researchers have found.

17 Dec 2014

Asking Precise Questions May Help Understand Relationship Between Global Warming and Extreme Weather

Extreme climate and weather events such as record high temperatures, intense downpours and severe storm surges are becoming more common in many parts of the world. But because high-quality weather records go back only about 100 years, most scientists have been reluctant to say if global warming affected particular extreme events.

15 Dec 2014

California Air Pollution Regulations Lead to Reduction in Air Pollution

Ever wonder what’s in the black cloud that emits from some semi trucks that you pass on the freeway? Lawrence Berkeley National Laboratory (Berkeley Lab) scientist Thomas Kirchstetter knows very precisely what’s in there, having conducted detailed measurements of thousands of heavy-duty trucks over months at a time at two San Francisco Bay Area locations.

12 Dec 2014

Spatial Patterns of Extreme Temperature Anomalies are Warming Even Faster than Overall Average

It's widely known that the Earth's average temperature has been rising. But research by an Indiana University geographer and colleagues finds that spatial patterns of extreme temperature anomalies -- readings well above or below the mean -- are warming even faster than the overall average.

11 Dec 2014

Researchers Uncover Previously Unknown Source of Greenhouse Gas Methane

Princeton University researchers have uncovered a previously unknown, and possibly substantial, source of the greenhouse gas methane to the Earth's atmosphere.

11 Dec 2014

Economists, Lawyers Urge Several Improvements to U.S. Government's Social Cost of Carbon Figure

The Social Cost of Carbon puts a dollar value on the climate damages per ton of CO2 released, and is used by - among others -policymakers to help determine the costs and benefits of climate policies. In the latest issue of the journal Science, a group of economists and lawyers urge several improvements to the government's Social Cost of Carbon figure that would impose a regular, transparent and peer-reviewed process to ensure the figure is reliable and well-supported by the latest facts.

5 Dec 2014

New Research Reveals Rise in Temperature of Seawater Around Antarctica

The temperature of the seawater around Antarctica is rising according to new research from the University of East Anglia.

5 Dec 2014

Ocean Heat Uptake May be the Cause of Decade-Long Slowdown in Global Surface Warming

New research shows that ocean heat uptake across three oceans is the likely cause of the 'warming hiatus' - the current decade-long slowdown in global surface warming.

4 Dec 2014

Extreme Weather Events May Increase Greenhouse Gas Emissions

Scientists at Helmholtz Zentrum München, in collaboration with colleagues from the TU München and the Karlsruhe Institute of Technology (KIT), have studied how soil microorganisms react to climatic change. Their result: Extreme weather events such as long periods of drought and heavy rainfall have a strong impact on the metabolic activity of microbes. This may lead to a change in the nutrient balance in soils and, in extreme cases, may even increase greenhouse gas emissions like nitrous oxide to the atmosphere concentrations.

4 Dec 2014