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Latest Earth's atmosphere Stories

2008-08-12 03:00:25

By Thomas, Wendy Marie In the 1970s, Paul J. Crutzen investigated the role of nitrogen oxides (NOx) on stratospheric ozone chemistry. A decade later, two other leading scientists in our field, Mario Molina and Rowland Sherwood, began investigating the potential depleting effect of chlorine, a parcel of chlorofluorocarbon (CFC) chains, on stratospheric ozone. In another 10 years, all three pioneers would hold the Nobel Prize in chemistry for their groundbreaking scientific investigations...

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2008-06-12 13:15:00

Answers may be hidden in the tropopause, 32,000 to 56,000 feet highScientists are deploying an advanced research aircraft to study a region of the atmosphere that influences climate change by affecting the amount of solar heat that reaches Earth's surface.Findings from the project, based at the National Center for Atmospheric Research (NCAR) in Boulder, Colo., will be used by researchers worldwide to improve computer models of global climate in preparation for the next report by the...

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2008-05-27 11:20:00

Clouds have typically posed a problem to scientists using satellites to observe the lowest part of the atmosphere, where humans live and breathe, because they block the satellite's ability to capture a clear, unobstructed view of Earth's surface. It turns out, however, that these "obstructions" are worth a closer look, as clouds and their characteristics actually serve a valuable role in Earth's climate. That closer look is now available by satellites comprising the Afternoon Constellation,...

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2008-05-21 11:55:49

A new approach dramatically improves the accuracy of atmospheric aerosol measurements on cloudy days RICHLAND, Wash. "“ Satellites taking atmospheric measurements might now be able to see blue skies as clearly as optimists do. Researchers have found a way to reduce cloud-induced glare when satellites measure blue skies on cloudy days, by as much as ten-fold in some cases. The result might lead to more accurate estimates of the amount of sunlight penetrating the atmosphere. Because...

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2008-04-28 00:30:00

Scientists say long before mankind began burning fossil fuels, there was an eons-long balance between carbon dioxide emissions and Earth's ability to absorb them. But now the planet is having trouble keeping up.A report in the journal Nature Geoscience, is based on ancient Antarctic ice bubbles that contain air samples going back 610,000 years.For the last 25 years, climate scientists have suggested that our planet's temperature and the level of carbon dioxide in the atmosphere have been...

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2008-04-25 00:35:00

A proposed method of injecting sulfate particles into the stratosphere in order to fight the effects of global warming, would have a drastic impact on Earth's protective ozone layer, researchers said in a new study.Simone Tilmes of the National Center for Atmospheric Research (NCAR) and colleagues conducted the study, which was published Thursday in Science Express.Researchers looked at the possible effects of "geoengineering" methods of cancelling out the impacts of global warming. One of...

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2008-04-04 15:55:00

ESA's Venus Express has measured a highly variable quantity of the volcanic gas sulphur dioxide in the atmosphere of Venus. Scientists must now decide whether this is evidence for active volcanoes on Venus, or linked to a hitherto unknown mechanism affecting the upper atmosphere. The search for volcanoes is a long-running thread in the exploration of Venus. "Volcanoes are a key part of a climate system," says Fred Taylor, a Venus Express Interdisciplinary Scientist from Oxford University....

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2008-03-24 12:05:00

Soot from biomass burning, diesel exhaust has 60 percent of the effect of carbon dioxide on warming but mitigation offers immediate benefitsBlack carbon, a form of particulate air pollution most often produced from biomass burning, cooking with solid fuels and diesel exhaust, has a warming effect in the atmosphere three to four times greater than prevailing estimates, according to scientists in an upcoming review article in the journal Nature Geoscience.Scripps Institution of Oceanography at...

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2008-02-26 14:20:00

High winds and big waves are part of the data -- and the challengeScientists will embark this week from Punta Arenas, Chile, on the tip of South America, to spend 42 days amid the high winds and waves of the Southern Ocean. Here they hope to make groundbreaking measurements to explain how huge fluxes of climate-affecting gases move between atmosphere and sea, and vice-versa.The cruise, which departs Feb. 28, should provide important information on how the greenhouse gas carbon dioxide moves...

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2008-02-04 08:40:00

ESA's Venus Express has recently "Ëœpeeled back' the thick clouds around Venus to provide the most accurate and wide-ranging map of water vapour and other gases in the lower atmosphere to date. As a planet, Venus does not radiate a significant amount of visible light. But because of the searing temperatures below its thick cloud layer, reaching 200°C at an altitude of 35 km and more than 450°C at the surface, there is great deal of infrared radiation coming from beneath. At...


Latest Earth's atmosphere Reference Libraries

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2012-05-12 09:22:57

Atlantis launched from Kennedy Space Center on November 3, 1994 at 11:59 AM EST and landed at Edwards AFB on November 14 at 7:33 AM PST. The shuttle orbited 174 times at an altitude of 164 nautical miles at an inclination of 57 degrees and travelled 4.5 million miles. The mission lasted 10 days, 22 hours, 34 minutes, and 2 seconds. This mission further advanced efforts to collect data about sun's energy output, chemical makeup of the Earth's middle atmosphere, and how these factors affect...

Weather Reference Library
2012-05-08 20:51:43

Important things to know when it comes to weather are the terms that a meteorologist uses on the television, radio or on a weather website.  The first term is Return flow. Sometimes you will hear a meteorologist use this term. The best way to understand this is to look at a weather map. When you see a High pressure center which is the blue H, look to the western side of that high pressure. This is where the warm moist air starts moving from the south back towards the north, which is why it...

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2009-07-06 17:01:44

Arctic haze is a phenomenon that occurs in the atmosphere at high latitudes in the Arctic due to air pollution. What distinguishes Arctic haze from haze found elsewhere, is the ability of its chemical ingredients to endure in the atmosphere for a longer period of time compared to other pollutants. Due to limited snowfall, rain, or turbulent air to displace pollutants from the polar air in the spring, Arctic haze can continue for more than a month in the northern atmosphere. Arctic haze was...

Earth's Atmosphere
2004-10-19 04:45:44

Earth's Atmosphere -- Earth's atmosphere consists of nitrogen (78.1%) and oxygen (20.9%), with small amounts of argon (0.9%), carbon dioxide (variable, but around 0.035%), water vapor, and other gases. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night. 75% of the atmosphere exists within 11km of the planetary surface. Temperature and the Atmospheric Layers The temperature of the Earth's atmosphere...

Sky
2004-10-19 04:45:44

Sky -- Although almost everyone have seen it, sky is hard to be defined precisely. Generally, sky is the space seen when one looks upward from the surface of a planet. Some people define sky as the denser gaseous zone of a planet's atmosphere. Clouds, rainbows and weather all occur amongst a planet's sky. In astronomy, the sky is divided into many regions, called constellations. The blue colour of the daytime sky results from the selective scattering of light rays. When the sunlight...

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Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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