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Latest Earth's atmosphere Stories

2006-05-26 06:18:52

LOS ANGELES (AP) - NASA has extended the mission of a satellite probing the least-studied region of the Earth's atmosphere through 2010. The four-year extension, announced Thursday, allows the $195 million Timed spacecraft to further study how the sun influences the middle and upper atmosphere. That could help scientists better understand how the region affects satellite tracking and communication systems on Earth. "Timed's extended mission will bring insights into atmospheric evolution and...

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2006-05-10 17:32:44

NASA and university researchers have found that thunderstorms over Tibet provide a main pathway for water vapor and chemicals to travel from the lower atmosphere, where human activity directly affects atmospheric composition, into the stratosphere, where the protective ozone layer resides. Learning how water vapor reaches the stratosphere can help improve climate prediction models. Similarly, understanding the pathways that ozone-depleting chemicals can take to reach the stratosphere is...

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2006-05-01 17:05:00

By Deborah Zabarenko WASHINGTON -- Greenhouse gases -- the heat-trapping chemicals linked to global warming -- continued to increase steadily in 2005, the U.S. National Oceanic and Atmospheric Administration reported on Monday. Carbon dioxide, emitted by coal-burning power plants and cars, increased last year, according to the federal climate agency's Annual Greenhouse Gas Index, or AGGI. So did nitrous oxide, a byproduct of farming and industry. But methane emissions leveled off and...

2006-05-01 16:55:00

WASHINGTON (AP) - The greenhouse gases widely blamed for raising the planet's temperature are still building up in the atmosphere. The National Oceanic and Atmospheric Administration said Monday there was a continuing increase in carbon dioxide and nitrous oxide in the air last year, though methane leveled off. The agency said and there was a decline in two chlorofluorocarbons, gases blamed for the ozone hole over the Antarctic. Overall, NOAA said, its annual greenhouse gas index "shows a...

2006-01-20 06:42:11

SAN JOSE, Costa Rica -- NASA scientists said Thursday they have launched a new study on climate change using a special aircraft that will enter the high troposphere - the lowest level of the earth's atmosphere - in the tropics. Paul Newman, one of the NASA project's coordinators, said the researchers will look at atmospheric contamination and how the ozone layer is changing. The $8 million project involves 140 scientists from the United States and 30 from Costa Rica, Newman told a news...

2005-12-07 17:31:31

Scientists for years have been at a loss to explain unexpectedly high levels of mercury in fish swimming the rivers and streams of areas like eastern Oregon, far away from industrial sources of mercury pollution such as coal-fired power plants. New University of Washington research suggests mercury can be carried long distances in the atmosphere, combining with other airborne chemicals as it travels. These compounds are much more water-soluble and therefore are more easily removed from the...

2005-12-07 17:12:27

Not only is the air around the world's highest mountains thin, but it's thick with ozone, says a new study from University of Toronto researchers. In fact, say the scientists, the ring of ozone that exists around the Tibetan plateau, which rises 4,000 metres above sea level and includes such famous peaks as Mount Everest and K2, is as concentrated as the ozone found in heavily polluted cities -- and may put climbers at risk. The findings are published in the journal Geophysical Research...

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2005-12-06 18:06:09

NASA's 2005 assessment of the size and thickness of the ozone layer was the first based on observations from the Ozone Monitoring Instrument on the agency's Aura spacecraft. Aura was launched in 2004. This year's ozone hole measured 9.4 million square miles at its peak between September and mid-October, which was slightly larger than last year's peak. The size of the ozone hole in 1998, the largest ever recorded, averaged 10.1 million square miles. For 10 of the past 12 years, the Antarctic...

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2005-11-30 12:15:57

ESA -- Strong turbulence in the upper atmosphere, a second ionospheric layer and possible lightning were among the surprises found by the Huygens Atmospheric Structure Instrument (HASI) during the descent to Titan's surface. HASI provided measurements from an altitude of 1400 km down to the surface of the physical characteristics of the atmosphere and surface, such as temperature and density profiles, electrical conductivity, and surface structure. The Huygens SSP made measurements just...

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2005-11-25 10:15:00

WASHINGTON -- Scientists are looking back to a time when "greenhouse gases" were not the problem they are today, and it is giving them a clearer picture of how people are making it worse. A team of European researchers analyzed tiny air bubbles preserved in Antarctic ice for millennia and determined there is more carbon dioxide in the atmosphere now than at any point during the last 650,000 years. The study by the European Project for Ice Coring in Antarctica, published Friday in the journal...


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
caparison
  • A cloth or covering, more or less ornamented, laid over the saddle or furniture of a horse, especially of a sumpter-horse or horse of state.
  • Clothing, especially sumptuous clothing; equipment; outfit.
  • To cover with a caparison, as a horse.
  • To dress sumptuously; adorn with rich dress.
This word ultimately comes from the Medieval Latin 'cappa,' cloak.
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