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John Mather, Chief Scientist for NASA's Science Mission Directorate, said, "EPOXI is a wonderful opportunity to add to our growing body of knowledge of exoplanets. Watching planets go behind or in front of their parent stars can tell us about their atmospheric chemistry." The other newly selected Discovery mission of opportunity is called New Exploration of Tempel 1 (NExT). The mission will reuse NASA's Stardust spacecraft to revisit comet Tempel 1. (PR Newswire)
NASA Recycles Old Spacecraft for New Missions Jul 4, 2007
Watching planets go behind or in front of their parent stars can tell us about their atmospheric chemistry. " Stardust returns While the Flyby spacecraft heads off to a new comet, NASA's Stardust probe will actually revisit Deep Impact's Tempel 1 target. Originally launched in 1999, Stardust chased down the Comet Wild 2 (pronounced "Vilt 2") for a 2004 rendezvous that swung within 150 miles (241 kilometers) of the icy wanderer. A sample canister aboard Stardust caught tiny pieces of Wild 2 and... (Space.com)
Two old space probes get new assignments Jul 4, 2007
"Watching planets go behind or in front of their parent stars can tell us about their atmospheric chemistry.". NExT: Revisiting Comet Tempel 1The other newly selected Discovery mission of opportunity is called NExT, or New Exploration of Tempel 1. (MSNBC -- Technology)
Greenland's ice meltdown quickens Jul 2, 2007
"There is broad consensus now that global warming is very real and that it's accelerating," said Greg Huey, professor of atmospheric chemistry at Georgia Institute of Technology who completed two months of field work last week, his third trip to Greenland. Huey is investigating high levels of NOx -- the same stew of nitrogen oxide gases found in urban smog from New York City to Los Angeles -- that form near the snow's surface on sunny days across the Greenland ice cap. (Albany Times Union)
Should the Executive Branch be immune from Congressional subpoenas? I guess today Cheney is back considering himself part of the Executive Branch. Really, folks, is this acceptable to you? More... Jun 29, 2007
Regarding climate change, the necessary disciplines of meteorology, climatology, atmospheric chemistry and physics, geology, palaeoceanography, quaternary science, mathematics-statistics and modeling are required. Of the aforementioned letter writers, apparently only Mr. McPhee is versed only in chemistry. (North County Times)
Computer Models Suggest Planetary And Extrasolar Planet Atmospheres Jun 22, 2007
New computer models, from both Earth-based spectroscopy and space mission data, are providing space scientists compelling evidence for a better understanding of planetary atmospheric chemistry ... Fegley provided an overview of comparative planetary atmospheric chemistry at the 233rd American Chemical Society National Meeting, held March 25-29, 2007, in Chicago. (Science Daily)
Plant Life On Extrasolar Earthlike Planets Could Be Black Jun 21, 2007
Scientists who speculate on plant life and what might constitute photosynthesis "out there" say that plant color depends on the size and light intensity that the planet feeds off from its star, or sun, as well as the extrasolar planet's atmospheric chemistry ... But it all depends on what size and light intensity of star or sun the planet feeds off, and the extrasolar planet's atmospheric chemistry. (Science Daily)
Scientists Study Sun's Radiation To Track Pollution Sources Jun 20, 2007
Colorado State University scientists are studying the reduction of solar ultraviolet radiation by atmospheric particles to learn how the various sources of pollution - biomass burning, auto exhaust and oil refining - affect the atmospheric chemistry and air quality of Mexico City. This particular technique will be used along with data retrieval from satellites around the world to study the influence of pollution on global warming and climate change. (Science Daily)
Huge Balls of Fire Found Rocketing Above Clouds Jun 14, 2007
The discovery challenges current theories of how mysterious sprites form and could lead to new understanding of atmospheric chemistry ... Still, the energy is released so quickly that Nielsen thinks some yet-to-be-discovered atmospheric chemistry is occurring. (Fox News)
Glaciers one day, sea the next: melting of poles gathers pace Jun 9, 2007
Published in the journal Atmospheric Chemistry and Physics, the study used a computer model that incorporated more information than previous ones on factors such as changes in solar radiation, volcanic particles, soot, land use and clouds. In another study, British Antarctic Survey scientists reported this week they had tracked the flow of more than 300 previously unstudied glaciers on the Antarctic Peninsula using satellite radar systems. (Sydney Morning Herald)
Solar Shield Could be Quick Fix for Global Warming Jun 8, 2007
On 1 June, James Hansen, head of NASA's Institute for Space Studies in the US, published a paper stating that Earths' climate system has (Atmospheric Chemistry and Physics, vol 7, p 2287). Lesser of two evils. (Newsmax)
Earth's Climate Approaches Dangerous Tipping Point Jun 4, 2007
The research appears in the current issue of "Atmospheric Chemistry and Physics.". In January 2006, Dr. Hansen said that officials at NASA headquarters had ordered the public affairs staff to review his coming lectures, papers, postings on the Goddard website and requests for interviews from journalists. (Environment News Service)
NASA chief says global warming may not be a concern Jun 2, 2007
On Wednesday, Griffin's own agency put out a news release about a research paper written by nearly 50 NASA and Columbia University scientists and published in the journal Atmospheric Chemistry and Physics. The paper shows how "human-made greenhouse gases have brought the Earth's climate close to critical tipping points, with potentially dangerous consequences for the planet.". (North County Times)
Scientists Study Impact Of Asian Dust On Weather, Climate Jun 2, 2007
His three-dimensional atmospheric chemistry model is currently used to track man-made chemicals released into the atmosphere. The UIowa-STEM model, as it is famously known, was one of the principal scientific tools used in PACDEX to design aircraft flight paths to and from the United States. (Science Daily)
NASA: Earth nearing climate 'tipping points' Jun 1, 2007
If global emissions of carbon dioxide continue to rise at the rate of the past decade, this research shows that there will be disastrous effects, including increasingly rapid sea level rise, increased frequency of droughts and floods, and increased stress on wildlife and plants due to rapidly shifting climate zones," lead author James Hansen of NASA's Goddard Institute was quoted as saying in the NASA statement.The study defined tipping points as episodes where even moderate additional warming... (MSNBC -- Environment)
Earth's Climate Approaching 'Tipping Point', According To NASA Jun 1, 2007
The research appears in the current issue of Atmospheric Chemistry and Physics. Tipping points can occur during climate change when the climate reaches a state such that strong amplifying feedbacks are activated by only moderate additional warming. (Science Daily)
NASA climate scientist 'shocked' by Griffin Jun 1, 2007
Hansen and a team of researchers, many from NASA, published their warnings Thursday in the science journal Atmospheric Chemistry and Physics. The lead author charged that Griffin's remarks only serve to confuse the public. (Houston Chronicle)
'Green eye' tech centre launched May 3, 2007
"The priorities in the first instance will concentrate on new remote sensing technologies relating to atmospheric chemistry and how that relates to climate," explained Dr Arwyn Davies, director of Earth observation for both Nerc and the British National Space Centre. "We think we have a number of strengths in the UK to play to on that front," he told BBC News. (BBC News -- Science)
Beijing Restrictions Offer Case Study In Emissions Of Key Atmospheric Gases May 1, 2007
"Coordinated observations on such occasions can provide precious opportunities to test and refine our understanding of atmospheric chemistry not only for Beijing but also for the large region of East Asia," McElroy says. McElroy, Wang, and Boersma worked in collaboration with NASA and Henk J. Estes and J. Pepijn Veefkind of the Royal Dutch Meteorological Institute. (Science Daily)
Satellite to study world's most mysterious clouds Apr 29, 2007 Extra-Terrestrial trees may be red Apr 13, 2007 Alien plants 'more colourful than Earth's flora' Apr 12, 2007 NASA Predicts Nongreen Plants On Other Planets Apr 12, 2007 NASA aims to clear up mystery of elusive clouds at edge of space Apr 12, 2007 'Plants' on alien planets could be purple or yellow, say NASA scientists Apr 12, 2007 How does atmospheric chemistry affect air quality and climate change? Find out at AirUCI's Community Day UCI, Mar. 26 Mar 27, 2007 Scripps-McClatchy Western Service News Sked Mar 19, 2007 First Ozone And Nitrogen Dioxide Measurements From The Global Ozone Monitoring Experiment Mar 16, 2007 The Planetary Adventure Continues: Mars Express And Venus Express Operations Extended Mar 11, 2007 Biological physicist awarded Sloan fellowship UCI, Feb. 28 Mar 1, 2007 Petrified Lightning Feb 19, 2007 First stars in telescope's sights Jan 13, 2007 Northern Lights Research Enters Final Frontier: Satellites To Gain Closer Look At Aurora Borealis Jan 13, 2007 'Proof' of methane lakes on Titan Jan 5, 2007
The clouds form as a result of a complex interaction between temperature, water vapour, solar activity, atmospheric chemistry and small particles that allow the water droplets to crystallise into ice. In recent years, the clouds have been spotted more frequently, for longer periods and at lower latitudes, suggesting to some scientists that this may be the result of human activity, either from global warming or an increase in dust particles. (Independent)
Trans-Pacific flight to track Asian dust Apr 23, 2007
They are faster so you can get from (the) aircraft more detailed data, said Lynn Russell, a professor of atmospheric chemistry at Scripps, who helped outfit the Gulfstream V for experiments. The plane has a nonstop range of about 6,000 miles and can reach an altitude of 51,000 feet, which is important for assessing the dust plume from top to bottom. (San Diego Union-Tribune)
The lead author of the study, biometeorologist Nancy Kiang, says the team calculated what the stellar light would look like at the surface of Earth-like planets whose atmospheric chemistry is similar to the stars they orbit. Extrapolating Earth-based data for photosynthesis (the process by which Earth-based plants make carbohydrates such as sugar, using water, carbon dioxide, and sunlight), the scientists found out that each planet will have a unique dominant colour for the process. (Daily News & Analysis)
Working with colleagues at the Virtual Planetary Laboratory, California Institute of Technology, Pasadena, Dr Kiang calculated what the light of a local star would look like at the surface of Earth-like planets whose atmospheric chemistry is consistent with the different types of stars they orbit. By looking at the changes in that light through different atmospheres, researchers identified colours that would be most favourable for plants to harness that light by the process of photosynthesis. (Telegraph.co.uk)
Kiang and her colleagues calculated what the stellar light would look like at the surface of Earth-like planets whose atmospheric chemistry is consistent with the different types of stars they orbit. By looking at the changes in that light through different atmospheres, researchers identified colors that would be most favorable for photosynthesis on other planets. (Science Daily)
Their seasonal lifecycle is controlled by complex interactions between temperature, water vapor, solar activity, atmospheric chemistry and small particles on which the cloud crystals form. Human-induced factors such as carbon dioxide cause a warming in the lower atmosphere but a cooling in the mesosphere. (EurekAlert!)
"While we don't know about the type of organism, I think solid physics and atmospheric chemistry absorption properties do give some kind of hint as to what colour it will be," he said. The team hope that the predictions could be used to help detect the presence of life on potentially inhabitable planets in other solar systems. (Guardian Unlimited -- Life)
UC NewsWire -- How does atmospheric chemistry affect air quality and climate change ... How does atmospheric chemistry affect air quality and climate change ... AirUCI, the atmospheric chemistry research institute at UC Irvine, will hold its third annual Community Day. (University of California Newswire, CA)
KRIST (Krist, SMWS _ Column) _ Because the relationship between carbon dioxide and plant growth is one of the few facts of atmospheric chemistry that virtually everyone knows, it has proved to be an effective weapon in the rhetorical arsenal of global-warming skeptics. So what if atmospheric carbon dioxide concentrations have increased 30 percent over the past 150 years. (Scripps Howard News Wire)
The products have been developed by the German Aerospace Center (DLR) in partnership with EUMETSAT s Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M SAF), which is coordinated by the Finnish Meteorological Institute (FMI). The O3M SAF generates, validates, archives and distributes atmospheric ozone, trace gases, aerosols and surface-ultraviolet radiation data products using measurements from MetOp-A.. (Science Daily)
Venus Express results also include preliminary important measurements of the atmospheric chemistry and temperature, and the analysis of the atmospheric escape processes in combination with the action of the solar wind, fundamental to understand the water history and the evolution of the planet's atmosphere. Venus Express' extension will allow to achieve a global coverage of the atmosphere of this planet, so similar and at the same time so different from Earth. (Science Daily)
Its research rates among the nation's finest in atmospheric chemistry, organic chemistry, geoscience, elementary particle physics and condensed matter physics. About the University of California, Irvine: The University of California, Irvine is a top-ranked university dedicated to research, scholarship and community service. (University of California Newswire, CA)
The gases trapped in bubbles within samples of fulgurite provide clues to ancient soil and atmospheric chemistry and climate. Rafael Navarro-Gonzlez. (Science News for Kids)
" We just know we can do more with something better John Mather JWST should also be able to detect extrasolar planets through the transit technique and examine the formation of planetary systems, a puzzle that has occupied astronomers for more than 50 years. And it even aims to shed light on the origins of life. "We may be able to see something about the atmospheric chemistry of planets. If the planet's small enough, we may be able to learn about organic chemistry on an Earth-like object," said... (BBC News -- Science)
An international team of scientists -- including physicists from the University of Calgary -- will begin gathering the most detailed information yet about the ever-changing northern lights, as a multi-year research project enters its ultimate phase with the launch of five NASA satellites from Cape Canaveral next month. The THEMIS mission plans to unravel the tantalizing mystery behind auroral substorms, an avalanche of magnetic energy powered by the solar wind that intensifies the northern and... (Science Daily)
The atmospheric chemistry on Titan is dominated by nitrogen and carbon-based compounds ... Everything scientists know about the atmospheric chemistry on Titan suggests the liquid in the lakes should be predominantly methane, with some ethane also mixed in. (BBC News -- Science)
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