Latest Earth's atmosphere Stories

2009-07-14 16:00:00

Scientists search for an understanding of the air-water interface and its effect on air qualityTraveling to Los Angeles can be a hazardous undertaking. The buzzing coastal city at the very edge of the American frontier has long been a symbol of exploration and progress. As planes land in L.A., they must first penetrate the dark, ominous cloud that hangs constantly above the skyscrapers. Smog lies over L.A. like a thick blanket, dimming the sunshine of the Golden State.To some degree,...

2009-07-14 12:05:42

A team of researchers has discovered an unexpected concentration of a certain isotopic molecule in parts of the stratosphere that could have implications for understanding the carbon cycle and its response to climate change.By analyzing samples of air taken from the stratosphere"”the layer of Earth's atmosphere that sits between six and 30 miles above the surface"”the team found a much higher concentration of 16O13C18O at high latitudes than expected. They report their finding in...

2009-06-29 16:37:33

Particulate pollution thought to be holding climate change in check by reflecting sunlight instead enhances warming when combined with airborne soot, a new study has found.Like a black car on a bright summer day, soot absorbs solar energy. Recent atmospheric models have ranked soot, also called black carbon, second only to carbon dioxide in potential for atmospheric warming. But particles, or aerosols, such as soot mix with other chemicals in the atmosphere, complicating estimates of their...

2009-06-24 14:28:13

The mysterious 1908 Tunguska explosion that leveled 830 square miles of Siberian forest was almost certainly caused by a comet entering the Earth's atmosphere, says new Cornell University research. The conclusion is supported by an unlikely source: the exhaust plume from the NASA space shuttle launched a century later. The research, accepted for publication (June 24, 2009) by the journal Geophysical Research Letters, published by the American Geophysical Union, connects the two events by what...

2009-06-15 10:30:00

Earth observation satellites in low orbit are continually buffeted by the wisps of atmosphere that remain. Predicting how much air drag a satellite can encounter is critical to the design, cost and operation of a mission "“ an ESA study shows how. Earth's atmosphere is often portrayed as a fragile, finite, thin layer of gas blanketing the planet. However, since the number of atmospheric particles decrease exponentially with altitude, there is no real boundary between the atmosphere and...

2009-06-13 10:45:00

Billion-year life extension for Earth also doubles the odds that advanced life will be found elsewhere in the universe Roughly a billion years from now, the ever-increasing radiation from the sun will have heated Earth into inhabitability; the carbon dioxide in the atmosphere that serves as food for plant life will disappear, pulled out by the weathering of rocks; the oceans will evaporate; and all living things will disappear. Or maybe not quite so soon, say researchers from the California...

2009-06-11 14:08:21

The U.S. space agency says its Wide-field Infrared Survey Explorer called WISE is undergoing final preparations for a planned Nov. 1 launch. The National Aeronautics and Space Administration mission, to lift off from Vandenberg Air Force Base in California, will survey the entire sky at infrared wavelengths to create a cosmic clearinghouse of hundreds of millions of objects. Most of the sky has never been imaged at these infrared wavelengths with this kind of sensitivity, said Edward Wright,...

2009-05-27 16:04:00

HAMPTON, Va., May 27 /PRNewswire-USNewswire/ -- Rising surface ozone concentrations are damaging nearly $2 billion in annual U.S. soybean crops, a NASA study of satellite measurements indicates. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) The study, headed by NASA Langley Research Center in Hampton, Va., was presented at the American Geophysical Union Joint Assembly meeting, May 24 in Toronto and looked at five years of soybean yields, surface ozone and satellite...

2009-05-08 12:24:17

Earth's earliest ice age could have been caused by an atmospheric rise in oxygen reacting with methane, a greenhouse gas, a geologist in Maryland said. This singular event had a profound effect on the climate, and also on life, said Alan J. Kaufman, a geology professor at the University of Maryland. Kaufman and a team of international scientists found evidence the oxygenation of Earth's atmosphere coincided with the first widespread ice age on the planet 2 1/2 billion years ago. They theorize...

2009-05-07 13:27:52

An international team of geologists may have uncovered the answer to an age-old question - an ice-age-old question, that is. It appears that Earth's earliest ice age may have been due to the rise of oxygen in Earth's atmosphere, which consumed atmospheric greenhouse gases and chilled the earth. Alan J. Kaufman, professor of geology at the University of Maryland, Maryland geology colleague James Farquhar, and scientists from Germany, South Africa, Canada, and the U.S.A., uncovered evidence...

Latest Earth's atmosphere Reference Libraries

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...

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...

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
  • An evil spirit; a devil.
  • A nightmare.
  • In astrology, the twelfth house of a scheme or figure of the heavens: so called from its signifying dreadful things, such as secret enemies, great losses, imprisonment, etc.
'Cacodemon' comes from a Greek term meaning 'evil genius.'