http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Solar geoengineering is a proposed approach to reduce the effects of climate change due to greenhouse gasses by deflecting some of the sun's incoming radiation. This type of proposed solution carries with it a number of uncertainties, however, including geopolitical questions about who would be in charge of the activity and its goals. http://phys.org/news280680985.html Space & Earth Thu, 21 Feb 2013 14:56:31 EST news280680985 (Phys.org)—The benefits and side effects of dissolving particles in our ocean's surfaces to increase the marine uptake of carbon dioxide (CO2), and therefore reduce the excess amount of it in the atmosphere, have been analysed in a new study published today. http://phys.org/news278012690.html Space & Earth Mon, 21 Jan 2013 19:00:01 EST news278012690 With policymakers and political leaders increasingly unable to combat global climate change, more scientists are considering the use of manual manipulation of the environment to slow warming's damage to the planet. http://phys.org/news276355550.html Space & Earth Wed, 02 Jan 2013 13:25:56 EST news276355550 (Phys.org)—With policymakers and political leaders increasingly unable to combat global climate change, more scientists are considering the use of manual manipulation of the environment to slow warming's damage to the planet. http://phys.org/news275213806.html Space & Earth Thu, 20 Dec 2012 08:30:01 EST news275213806 By tailoring geoengineering efforts by region and by need, a new model promises to maximize the effectiveness of solar radiation management while mitigating its potential side effects and risks. Developed by a team of leading researchers, the study was published in the November issue of Nature Climate Change. http://phys.org/news270018078.html Space & Earth Sun, 21 Oct 2012 13:00:05 EST news270018078 A cost analysis of the technologies needed to transport materials into the stratosphere to reduce the amount of sunlight hitting Earth and therefore reduce the effects of global climate change has shown that they are both feasible and affordable. http://phys.org/news265599839.html Space & Earth Fri, 31 Aug 2012 02:46:38 EST news265599839 Even though it sounds like science fiction, researchers are taking a second look at a controversial idea that uses futuristic ships to shoot salt water high into the sky over the oceans, creating clouds that reflect sunlight and thus counter global warming. http://phys.org/news264687432.html Space & Earth Mon, 20 Aug 2012 13:19:07 EST news264687432 One idea for fighting global warming is to increase the amount of aerosols in the atmosphere, scattering incoming solar energy away from the Earth's surface. But scientists theorize that this solar geoengineering could have a side effect of whitening the sky during the day. New research from Carnegie's Ben Kravitz and Ken Caldeira indicates that blocking 2% of the sun's light would make the sky three-to-five times brighter, as well as whiter. Their work is published June 1st in Geophysical Research Letters, a journal of the American Geophysical Union. http://phys.org/news257681382.html Space & Earth Thu, 31 May 2012 11:09:49 EST news257681382 Anthropogenic climate warming is leading to consideration of options for geoengineering to offset rising carbon dioxide levels. One potential technique involves injecting artificial sea spray into the atmosphere. The sea salt particles would affect Earth's radiation budget directly, by scattering incoming solar radiation, and indirectly, by acting as cloud condensation nuclei, which could lead to whiter clouds that reflect more radiation. http://phys.org/news248448216.html Space & Earth Tue, 14 Feb 2012 13:50:01 EST news248448216 Solar radiation management is a class of theoretical concepts for manipulating the climate in order to reduce the risks of global warming caused by greenhouse gasses. But its potential effectiveness and risks are uncertain, and it is unclear whether tests could help narrow these uncertainties. A team composed of Caltech's Doug MacMynowski, Carnegie's Ken Caldeira and Ho-Jeong Shin, and Harvard's David Keith used modeling to determine the type of testing that might be effective in the future. Their work has been published online by Energy and Environmental Science. http://phys.org/news238845966.html Space & Earth Wed, 26 Oct 2011 11:06:12 EST news238845966 (AP) -- To the quiet green solitude of an English country estate they retreated, to think the unthinkable. http://phys.org/news221054041.html Space & Earth Sun, 03 Apr 2011 12:54:21 EST news221054041 Scientists call it "geoengineering," but in plain speak, it means things like this: blasting tons of sulfate particles into the sky to reflect sunlight away from Earth; filling the ocean with iron filings to grow plankton that will suck up carbon; even dimming sunlight with space shades. http://phys.org/news219930648.html Space & Earth Mon, 21 Mar 2011 14:20:03 EST news219930648 (AP) -- Like the warming atmosphere above, a once-taboo idea hangs over the slow, frustrating U.N. talks to curb climate change: the idea to tinker with the atmosphere or the planet itself, pollute the skies to ward off the sun, fill the oceans with gas-eating plankton, do whatever it takes. http://phys.org/news210762601.html Space & Earth Sun, 05 Dec 2010 09:10:15 EST news210762601 Geoengineering could prevent the potentially catastrophic climate-change tipping points that loom just ahead, reports a new Cornell study. http://phys.org/news205576690.html Space & Earth Wed, 06 Oct 2010 09:50:02 EST news205576690 Reflecting sunlight from the Earth by geoengineering would undoubtedly cool the climate, but would different countries agree on how much to reflect? Research by climate scientists at the University of Bristol shows that the impact of geoengineering would be felt in very different ways across the world. http://phys.org/news203784610.html Space & Earth Wed, 15 Sep 2010 16:00:01 EST news203784610 There may be better ways to engineer the planet's climate to prevent dangerous global warming than mimicking volcanoes, a University of Calgary climate scientist says in two new studies. http://phys.org/news203078685.html Space & Earth Tue, 07 Sep 2010 11:45:08 EST news203078685 (PhysOrg.com) -- Falling rock shatters the tranquillity of Yosemite National Park about every 10 days, and occasionally leads to fatalities. What forces trigger a rockfall? Are there precursor signals that one is imminent? Research at Yosemite by geoengineering Ph.D. student Valerie Zimmer and fellow scientists could make it possible to predict when and where rockfalls are likely to occur. http://phys.org/news193418588.html Space & Earth Tue, 18 May 2010 16:25:53 EST news193418588 (PhysOrg.com) -- A Harvard physicist has proposed the Earth could be cooled by pumping vast numbers of tiny bubbles into the sea to lower ocean temperatures and increase the water’s reflectivity. The same strategy could be used in rivers and lakes to reduce evaporation. http://phys.org/news189059955.html Space & Earth Mon, 29 Mar 2010 07:10:02 EST news189059955 The adage says that to discover the right solutions to a problem you first have to ask the right questions. http://phys.org/news185802989.html Space & Earth Fri, 19 Feb 2010 12:20:02 EST news185802989 Ships blowing off steam are helping researchers understand how manmade particles might be useful against global warming. New results from modeling clouds like those seen in shipping lanes reveal the complex interplay between aerosols, the prevailing weather and even the time of day the aerosol particles hit the air, according to research presented Saturday morning at the American Association for the Advancement of Science's annual meeting. http://phys.org/news185802749.html Space & Earth Fri, 19 Feb 2010 11:52:43 EST news185802749 (PhysOrg.com) -- The effects of climate change are so uncertain and potentially long-lasting that policymakers should begin examining options that include geoengineering, an area that has so far been off-limits, according to a former Harvard researcher who is now a professor at the University of Calgary, Canada. http://phys.org/news172943655.html Space & Earth Wed, 23 Sep 2009 17:10:02 EST news172943655 Sci-fi proposals to cool the planet are laden with risk but may be Earth's only hope if politicians fail to tackle global warming, scientists said on Tuesday in their biggest evaluation to date of "geo-engineering" concepts. http://phys.org/news171034934.html Space & Earth Tue, 01 Sep 2009 15:10:04 EST news171034934 Hot on the heels of the Royal Society's Geoengineering the Climate report, September's Physics World contains feature comment from UK experts stressing the need to start taking geoengineering - deliberate interventions in the climate system to counteract man-made global warming - more seriously. http://phys.org/news171025917.html Space & Earth Tue, 01 Sep 2009 12:12:27 EST news171025917