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Latest Earth's atmosphere Stories

2009-02-09 11:26:10

U.S. scientists say global warming might delay the recovery of stratospheric ozone in some parts of the Earth, negatively affecting public health. Researchers led by Johns Hopkins University Professor Darryn Waugh said they discovered increasing greenhouse gases could delay, or even postpone indefinitely, the recovery of stratospheric ozone in some regions of the Earth, including Australia and Brazil, possible taking a toll on public health. They said climate change could cause variations in...

2009-02-05 10:44:55

Increasing greenhouse gases could delay, or even postpone indefinitely the recovery of stratospheric ozone in some regions of the Earth, a new study suggests. This change might take a toll on public health.Darryn W. Waugh, an atmospheric scientist at Johns Hopkins University in Baltimore, and his colleagues report that climate change could provoke variations in the circulation of air in the lower stratosphere in tropical and southern mid-latitudes "” a band of the Earth including...

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2009-01-30 11:25:00

Scientists have completed the first of five pole-to-pole flights intended to determine how greenhouse gases travel. The Harvard University-led project based in Colorado conducted the three-week $4.5 million mission using a high performance jet this month, and researchers have already reported valuable new findings. Scientists left on January 8, aboard the specially equipped jet, which took air samples while flying from Colorado to the Arctic before heading back down to the Hawaiian Islands...

2009-01-29 10:00:00

WASHINGTON, Jan. 29 /PRNewswire-USNewswire/ -- NASA's first spacecraft dedicated to studying atmospheric carbon dioxide is in final preparations for a Feb. 23 launch from Vandenberg Air Force Base in California. Carbon dioxide is the leading human-produced greenhouse gas driving changes in Earth's climate. (LOGO: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) The Orbiting Carbon Observatory will provide the first complete picture of human and natural carbon dioxide sources as well...

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2009-01-22 08:54:28

Sulfuryl fluoride stays in atmosphere at least 30 years, finds UCI study An insecticide used to fumigate termite-infested buildings is a strong greenhouse gas that lives in the atmosphere nearly 10 times longer than previously thought, UC Irvine research has found. Sulfuryl fluoride, UCI chemists discovered, stays in the atmosphere at least 30-40 years and perhaps as long as 100 years. Prior studies estimated its atmospheric lifetime at as low as five years, grossly underestimating the global...

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2009-01-13 09:20:00

Aircraft capable of flying 20 km above the surface of the Earth are being used to test instruments that could be carried on satellites to improve our understanding of how atmospheric chemistry and climate are linked. These types of high-altitude experiments support the candidate Earth Explorer PREMIER mission. PREMIER (PRocess Exploration through Measurements of Infrared and millimeter-wave Emitted Radiation) is one of the six candidate Earth Explorer missions that have just completed...

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2008-12-18 09:38:51

UCLA scientist sees many geoengineering plans as 'preposterous' Global warming, some have argued, can be reversed with a large-scale "geoengineering" fix, such as having a giant blimp spray liquefied sulfur dioxide in the stratosphere or building tens of millions of chemical filter systems in the atmosphere to filter out carbon dioxide. But Richard Turco, a professor in the UCLA Department of Atmospheric and Oceanic Sciences and a member and founding director of UCLA's Institute of the...

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2008-12-16 10:04:35

CU-Boulder findings should help satellite tracking, communication forecasting A new University of Colorado at Boulder study shows the periodic "breathing" of Earth's upper atmosphere that has long puzzled scientists is due in part to cyclic solar wind disturbances, a finding that should help engineers track satellites more accurately and improve forecasts for electronic communication disruptions. Aerospace engineering sciences department Associate Professor Jeff Thayer said the outer, gaseous...

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2008-12-07 15:00:00

The often contentious debate about global warming has been absent a critical component:  an accurate measurement of precisely how much carbon dioxide (CO2) is in the air, and how it is being recycled by the planet.To address the matter, NASA will embark on a new mission early next year called the Orbital Carbon Observatory (OCO). "We will uncover all kinds of patterns and cycles in carbon dioxide that people never thought existed. It'll be just like when the first ozone measurements were...

2008-12-03 17:09:34

For over two centuries, meteorologists were puzzled by the observation that atmospheric pressure in the tropics peaks at 10 a.m. and 10 p.m. nearly every day. In the late 1960s, a theory was proposed that these surface pressure variations result from waves that are generated by the sun's heating of the upper atmosphere. The waves, called solar tides, propagate to the ground as they travel around the globe. Strong support for this theory has now been presented in a study by a US-Japan team of...


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
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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