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Topic: Mesosphere


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In the News (Mon 22 Apr 19)

  
  Mesosphere
The mesosphere (literally middle sphere) is the third highest layer in our atmosphere, occupying the region 50 km to 80 km above the surface of the Earth, above the troposphere and stratosphere, and below the thermosphere.
Temperatures in the mesosphere drop with increasing altitude to about -100°C. The mesosphere is the coldest of the atmospheric layers.
The mesosphere is also the layer in which a lot of meteors burn up while entering the Earth's atmosphere.
www.ace.mmu.ac.uk /eae/Atmosphere/Older/Mesosphere.html   (149 words)

  
  Mesosphere   (Site not responding. Last check: )
The interface between the stratosphere and the mesosphere is called the stratopause, and the interface between the mesosphere and the thermosphere above is called the mesopause.
The consequent rapid decrease in temperature with altitude is the major defining characteristic of the mesosphere.
In summer, the rapidity of the temperature decrease as ozone heating falls away with height is coupled with extra cooling due to the background average rising motion.
library.thinkquest.org /21418/spacee/Mesos.htm   (484 words)

  
  * Mesosphere - (Astronomy): Definition
The mesosphere is the atmospheric layer between the stratosphere and the ionosphere.
The stratosphere is the atmospheric layer between the troposphere and the mesosphere.
The stratosphere is characterized by a slight temperature increase with altitude and the absence of clouds.
en.mimi.hu /astronomy/mesosphere.html   (253 words)

  
 Atmosphere - Mesosphere
Mesosphere is a layer of the earth's atmosphere.
The temperature of the air in the mesosphere generally decreases as the altitude increases.
The air in the mesosphere may mix, as it does in the troposphere.
library.thinkquest.org /C005686/htmfiles/mesosphere.htm   (162 words)

  
 Mesosphere: World of Earth Science
These layers are separated by "pauses," where no change in the temperature occurs with altitude change: the tropopause (between the troposphere and the stratosphere), the stratopause (between the stratosphere and the mesosphere), and the mesopause (between the mesosphere and the thermosphere).
The stratosphere and mesosphere together are called the middle atmosphere, and their region also overlaps with the ionosphere, which is a region defined on the basis of the electric charges of the particles there.
The mesosphere, which means middle sphere, is the third layer of Earth's atmosphere, between the stratosphere, and the thermosphere.
science.enotes.com /earth-science/mesosphere   (341 words)

  
 The Mesosphere
The upper region of the mesosphere is amazingly the coldest area of the entire atmosphere.
This is caused by the meteor rubbing against molecules in the mesosphere.
It is the boundary between the mesosphere and the cold yet hot thermosphere.
members.tripod.com /atmosphere_guys/mesosphere.html   (138 words)

  
 Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal   (Site not responding. Last check: )
The mesosphere (from the Greek words mesos = middle and sphaira = ball) is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
This has led the mesosphere and the lower thermosphere to be jokingly referred to by scientists as the ignorosphere [1] [2].
Temperatures in the upper mesosphere fall as low as -100°C (-146°F or 173 K) [3], varying according to latitude and season.
www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=mesosphere   (302 words)

  
 Exploring the Heavens with Laser Light, Alaska Science Forum
Because the mesosphere is a tough place to study--balloons carrying sensors pop before they get that high, and satellites can't orbit that low--scientists know little about the region when compared to their knowledge of the atmosphere above and below.
The mesosphere is the home of shooting stars, where meteors flame out as they hurdle toward Earth at speeds as fast as 30 miles per second.
The laser light travels to the mesosphere and bounces off the sodium atoms; the returning light is captured by a telescope next to the laser.
www.gi.alaska.edu /ScienceForum/ASF13/1376.html   (650 words)

  
 AECL 1000 Atmosphere Project Troposphere   (Site not responding. Last check: )
However the mesosphere is THE middle layer in the atmosphere.
Like the troposphere, the mesosphere's temperature decreases when altitude increases.(5) At the top of the mesosphere, air temperature reaches its coldest value, around - 90 degrees Celsius, and the air is extremely thin at this level.
The coldest temperatures occur at the north and south poles, the reason it is so cold is because the air particles rise in the mesosphere and retain there total heat energy but expand, therefore growing colors making a drop in the temperature this is called Adiabatic process.
w3.uwyo.edu /~bmckim/atmosphere_mesosphere.html   (228 words)

  
 Atmosphere | Troposphere | Stratosphere | Mesosphere | Thermosphere
In the troposphere and mesosphere, temperature generally falls with increasing altitude, whilst in the stratosphere and thermosphere, temperature rises with increasing altitude.
The stratosphere is separated from the mesosphere above by the stratopause.
The thermosphere (literally "heat sphere") is the outer layer of the atmosphere, separated from the mesosphere by the mesopause.
www.weather-climate.org.uk /02.php   (1590 words)

  
 AIM Mission
The AIM satellite mission will explore Polar Mesospheric Clouds (PMCs), also called noctilucent clouds, to find out why they form and why they are changing.
Results from this mission will provide the basis for study of long-term variability in the mesospheric climate.
The Cloud Imaging and Particle Size (CIPS) experiment on AIM has measured the frequency of occurrence of Polar Mesospheric Clouds for the entire Northern 2007 season.
aim.hamptonu.edu   (268 words)

  
 mesosphere - Search Results - MSN Encarta
The layers of the atmosphere are the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere.
Above the ozone-rich stratosphere lies the mesosphere, where air temperature, again, decreases with height.
air, sky, heaven, ether, troposphere, stratosphere, mesosphere, thermosphere, exosphere, ambiance, impression, feeling, feel, mood, tone,...
encarta.msn.com /mesosphere.html   (99 words)

  
 Long-term changes in the mesosphere calculated by a two-dimensional model
When considering the observed increase in the abundances of greenhouse gases for the past 50 years, a cooling of 3–7 K is calculated in the mesopause region together with a cooling of 4–6 K in the middle mesosphere.
The largest cooling in the winter upper mesosphere-mesopause region occurs when the observed increase in concentrations of greenhouse gases and the strengthening of the gravity wave drag and diffusion are considered simultaneously.
In summer, however, consistently with observations, the thermal response calculated by the model is insignificant in the vicinity of the mesopause.
www.agu.org /pubs/crossref/2005/2003JD004410.shtml   (398 words)

  
 Climate Change and Giant Waves at the Edge of Space - Space - RedOrbit
At heights of around 80-100km (50-62 miles) the mesosphere is notoriously difficult to investigate and is the least-explored part of the earth’s atmosphere.
The low air pressure at this altitude means that it is impossible to fly aircraft in the mesosphere and even the huge weather balloons that are used to measure stratospheric ozone cannot climb high enough to reach this altitude.
“The mesosphere has been called the miner’s canary for climate change; meaning that it is very sensitive and the changes there may be larger than in any other part of the atmosphere.
www.redorbit.com /news/display?id=151811&source=r_space   (718 words)

  
 aerosols in the mesosphere
The commonly accepted view about the composition of the mesospheric aerosols is that they probably consist of ice.
Pure ice particles are not easily photo-ionized (the source of producing positively charged aerosols) and are unlikely to obtain positive charges.
The aerosol temperature (Td), which is dependent on the aerosol size, may explain the existence of positively charged aerosols in the upper mesosphere.
www-das.uwyo.edu /seminars/eidhammer.html   (266 words)

  
 NASA - AIM at the Edge of Space
Two of the leading suspects behind the recent changes in polar mesospheric clouds are an increase of water vapor in the region and colder temperatures.
One unusual source of mesospheric water vapor -- exhaust from rocket engines -- was recently shown to be the cause of an increase in Arctic polar mesospheric clouds (Geophysical Research Letters, M. Stevens et al., July 6, 2005).
In the mesosphere it is thought that cosmic dust particles falling into the Earth's atmosphere might serve this same purpose, although this has not been confirmed.
www.nasa.gov /mission_pages/aim/edge_of_space.html   (1410 words)

  
 The Mesosphere
In the Earth's mesosphere, the air is relatively mixed together and the temperature decreases with altitude.
The upper parts of the atmosphere, such as the mesosphere, can sometimes be seen by looking at the very edge of a planet (see picture to the left).
The mesosphere would be the dark blue edge on the far right hand side of the image.
www.windows.ucar.edu /tour/link=/earth_science/Atm_Science/Temp_structure/structure_meso.html&_ylu=X3oDMTBwdTQxbTI5BGNvbG8DZQRwb3MDOQRzZWMDc3IEdnRpZAM-/SIG=19kf31por/EXP=1152438246/**http:/216.109.125.130/search/cache   (162 words)

  
 Gravity Wave/Large Scale Flow Interactions in the Mesosphere:
Mesospheric data will be used to observe gravity wave/large-scale flow interaction signatures for comparison with model output.
Data gathered from both the stratosphere and mesosphere will be used to develop a time-varying (over the duration of the relevant feature in the large-scale flow) vertical profile of horizontal winds for the large-scale flow feature being considered.
These data sources will be used to verify that the mesospheric flow being studied is a large-scale flow and not just a local feature and that the interaction signature seen by the Urbana MF radar is also seen by other instruments.
www.atmos.uiuc.edu /~rlherman/Prelim_proposal.htm   (5480 words)

  
 Jet Propulsion Laboratory
The purpose of the Solar Mesosphere Explorer mission was to investigate the processes that create and destroy ozone in Earth's upper atmosphere.
The mesosphere is a layer of the atmosphere extending from the top of the stratosphere to an altitude of about 80 kilometers (50 miles).
Managed for NASA by JPL, Solar Mesosphere Explorer was built by Ball Space Systems and operated by the Laboratory for Atmospheric and Space Physics of the University of Colorado.
www.jpl.nasa.gov /missions/past/sme.html   (142 words)

  
 JetStream - An Online School for Weather: Layers of the Atmosphere
The regions of the stratosphere and the mesosphere, along with the stratopause and mesopause, are called the middle atmosphere by scientists.
The transition boundary which separates the stratosphere from the mesosphere is called the stratopause.
However, the gases in the mesosphere are thick enough to slow down meteorites hurtling into the atmosphere, where they burn up, leaving fiery trails in the night sky.
www.srh.noaa.gov /srh/jetstream/atmos/layers.htm   (565 words)

  
 Mesosphere Summary
The mesosphere (from the Greek words mesos = middle and sphaira = ball) is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
This has led the mesosphere and the lower thermosphere to be jokingly referred to by scientists as the ignorosphere[1][2].
The stratosphere and mesosphere are referred to as the middle atmosphere.
www.bookrags.com /Mesosphere   (629 words)

  
 tags --> University of Bath - Scientists use meteors to investigate climate change and giant waves at the ...</a></td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> Using the new radar, scientists will be able to investigate climate change and explore the theory that while the lower atmosphere is warming, the upper atmosphere is cooling by as much as 1 degree centigrade each year. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> The low air pressure at this <a href="/topics/Altitude" title="Altitude" class=fl>altitude</a> means that it is impossible to fly <a href="/topics/Aircraft" title="Aircraft" class=fl>aircraft</a> in the <b>mesosphere</b> and even the huge weather balloons that are used to measure <a href="/topics/Stratosphere" title="Stratosphere" class=fl>stratospheric</a> <a href="/topics/Ozone-layer" title="Ozone layer" class=fl>ozone</a> cannot climb high enough to reach this <a href="/topics/Altitude" title="Altitude" class=fl>altitude</a>. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> “The <b>mesosphere</b> has been called the miner’s canary for climate change; meaning that it is very sensitive and the changes there may be larger than in any other part of the atmosphere.</td></tr> <tr><td></td><td colspan=2><font color=gray>www.bath.ac.uk /pr/releases/antarcticradar.htm</font>   (793 words)</td></tr> </table> </td> </tr> </table><body face="Arial"> <br> <table cellpadding=0> <tr> <td>  </td> <td> <table > <tr><td> </td><td colspan=2><a href="http://www.agu.org/pubs/crossref/2002.../2001JD001235.shtml">Response of the mesosphere to human-induced perturbations and solar variability calculated by a 2-D model</a></td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> We have used the improved NCAR interactive 2-D model (SOCRATES) to investigate the chemical and thermal response of the <b>mesosphere</b> to composition changes from the preindustrial era (∼1850) to the present, to doubling the CO concentration, and to the 11-year solar flux variability. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> These results lead to the conclusion that the long-term increase in the well-mixed greenhouse gases, in particular CO, alters the thermal structure and chemical composition of the <b>mesosphere</b> significantly and that these anthropogenic effects are of the same magnitude as the effects associated with the 11-year solar cycle. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> Thus, the difference in the timescales involved suggests that the anthropogenic signal over periods of typically 10 years is smaller than the signal generated by the 11-year solar variability.</td></tr> <tr><td></td><td colspan=2><font color=gray>www.agu.org /pubs/crossref/2002.../2001JD001235.shtml</font>   (456 words)</td></tr> </table> </td> </tr> </table><body face="Arial"> <br> <table cellpadding=0> <tr> <td>  </td> <td> <table > <tr><td> </td><td colspan=2><a href="http://www.aad.gov.au/default.asp?casid=14831">Australian Antarctic Division - First observations of Polar Mesosphere Summer Echoes (PMSE) above Davis</a></td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> The first observations of Polar <b>Mesosphere</b> Summer Echoes (PMSE) above continental Antarctica were recorded using the VHF radar at Davis during the 2003-04 summer. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> PMSE are strong radar echoes associated with the extremely cold temperatures that occur in this region during the summer. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> Polar <b>mesosphere</b> summer echoes (PMSE) observed on the Davis VHF radar.</td></tr> <tr><td></td><td colspan=2><font color=gray>www.aad.gov.au /default.asp?casid=14831</font>   (322 words)</td></tr> </table> </td> </tr> </table><body face="Arial"> <br> <table cellpadding=0> <tr> <td>  </td> <td> <table > <tr><td> </td><td colspan=2><u>Amazon.com: Mesosphere</u>   <i>(Site not responding. Last check: )</i></td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> state chemistry, especially in the <b>mesosphere</b> and lower <a href="/topics/Thermosphere" title="Thermosphere" class=fl>thermosphere, is the</a>... </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> NASA TR R-360: Temperature, pressure, density, and wind measurements in the <a href="/topics/Stratosphere" title="Stratosphere" class=fl>stratosphere</a> and <b>mesosphere</b>, 1969. </td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> sodium D-line nightglow in the <b>mesosphere</b> and in <a href="/topics/Meteor" title="Meteor" class=fl>meteor</a> trails.</td></tr> <tr><td></td><td colspan=2><font color=gray>www.amazon.com /s?ie=UTF8&keywords=Mesosphere&tag=bizkitt-21&index=blended&link_code=qs&page=1</font>   (512 words)</td></tr> </table> </td> </tr> </table><script language="JavaScript"> <!-- // This function displays the ad results. // It must be defined above the script that calls show_ads.js // to guarantee that it is defined when show_ads.js makes the call-back. function google_ad_request_done(google_ads) { // Proceed only if we have ads to display! if (google_ads.length < 1 ) return; var s = ''; // For text ads, display each ad in turn. // In this example, each ad goes in a new row in the table. if (google_ads[0].type == 'text') { for(i = 0; i < 1; ++i) { s = '<body face="Arial"><br><table cellpadding=0><tr><td>  </td><td><table ><tr><td> </td><td colspan=2>' + '<a href="' + google_ads[i].url + '" title="' + google_ads[i].visible_url + '">' + google_ads[i].line1 + '</a>  <span style="font-size:10pt">'; if (google_info.feedback_url) { s += '<a href="' + google_info.feedback_url + '" style="color:#7070F0;text-decoration:none">(Ads by Google)</a>'; } else { s += '(Ads by Google)'; } s += '</span></td></tr>' + '<tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td>' + '<a href="' + google_ads[i].url + '" title="' + google_ads[i].visible_url + '" style="text-decoration:none;">' + google_ads[i].line2 + ' ' + google_ads[i].line3 + '</a></td></tr>' + '<tr><td></td><td colspan=2><font color=gray>' + '<a href="' + google_ads[i].url + '" title="' + google_ads[i].visible_url + '" style="text-decoration:none; color:gray;">' + google_ads[i].visible_url + '</a></font></td></tr></table></td></tr></table>'; d = document.getElementById('ad' + (i + 1)); d.innerHTML = s; d.style.display = 'block'; } s = ''; for(i = 1; i < google_ads.length; i++) { s += '<div class="r" style="margin-left: 14px"><table cellspacing=0 cellpadding=0><tr>' + // '<td valign=top><img src="/images/a.gif"/ style="padding-top: 3px; padding-right: 3px"></td>' + '<td ><a href="' + google_ads[i].url + '" title="' + google_ads[i].visible_url + '">' + google_ads[i].line1 + '<div style="text-decoration: none; ">' + google_ads[i].line2 + ' ' + google_ads[i].line3 + '</div></a>' + '<font color="gray"><a href="'+ google_ads[i].url + '" title="' + google_ads[i].visible_url + '" style="text-decoration:none; color:gray;">' + google_ads[i].visible_url + '</a></font>' + '</td></tr></table></div>' } d = document.getElementById('sky1'); d.innerHTML = s; if(s.length > 0) { document.getElementById('sky').style.display = 'block'; } } /* <body face="Arial"><br><table cellpadding=0><tr><td>  </td><td><table ><tr><td> </td><td colspan=2> <a href=" ### GOOGLE ADS[i] URL ### "> ### GOOGLE ADS[i] VISIBLE URL ### </a></td></tr> <tr><td valign=top><img style="margin-top:4px;" src=/images/a.gif></td><td></td><td> ### LINE 2 ###   ### LINE 3 ###</td></tr> <tr><td></td><td colspan=2><font color=gray> ### link ### </font>  (sponsored link)</td></tr> </table></td></tr></table> */ /* // For an image ad, display the image; there will be only one . if (google_ads[0].type == 'image') { s += '<tr><td align="center">' + '<a href="' + google_ads[0].url + '"style="text-decoration: none">' + '<img src="' + google_ads[0].image_url + '" height="' + google_ads[0].height + '" width="' + google_ads[0].width + '" border="0"></a></td></tr>'; } // Finish up anything that needs finishing up s += '</table>'; */ // document.write(s); return; } --> </script> <script language="JavaScript"> <!-- // This script sets the attributes for requesting ads. google_ad_client = "pub-9457578638026753"; google_max_num_ads = 6; google_feedback = "on"; google_ad_output = "js"; google_ad_channel = "844964098"; google_kw_type = "broad"; google_kw = "Mesosphere"; google_ad_type = "text_image"; google_image_size = "728x90"; google_encoding = "latin1"; --> </script> <script language="JavaScript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> <br> <p style="margin-left:30px;font-size:13px;"><b>Try your search on: <a href="http://www.qwika.com/find/Mesosphere">Qwika</a> (all wikis)</b></p> <form action=http://www.factbites.com/search.php><table width="100%" cellspacing=0 cellpadding=0 border=0><tr><td background="/images/f1.gif"><table cellspacing=0 cellpadding=0 border=0 background="/images/b.gif"><tr><td><img src="/images/f2.gif" width=38 height=37 alt=" "/></td><td><table cellspacing=0 cellpadding=0 border=0><tr><td><a href="/"><img src="/images/f3.gif" width=95 height=37 alt="Factbites" border=0 /></a><img src="/images/b.gif" width=15 height=1 alt=" "/></td><td valign=bottom><input type=text size=30 name=kp><img src="/images/b.gif" width=2 height=1 alt=" " /><input type=submit value="  Find »  " class=b2></td></tr></table></td></tr><tr><td> </td><td><span class=f> <a href="http://www.factbites.com/about_us.php">About us</a>   |   <a href="http://www.factbites.com/why_use_us.php">Why use us?</a>   |   <a href="http://www.factbites.com/reviews.php">Reviews</a>   |   <a href="http://www.factbites.com/press.php">Press</a>   |   <a href="http://www.factbites.com/contact_us.php">Contact us</a>   <br />Copyright © 2005-2007 www.factbites.com Usage implies agreement with <a href=http://www.factbites.com/terms_and_conditions.php>terms</a>.</span></td></tr></table><img src="/images/b.gif" width=450 height=1 alt=" " /></td></tr></table></form> </body></html>