Planning And Foresight: Using Contrails To Predict The Weather Contrails Contrails are not large enough to cause any weather on the ground. For people suffering respiratory illness, no matter what you believe, the best thing you can do is get medical help. The mixing is a result of turbulence generated by the engine exhaust. Of course, before scientists can study the effects of contrails they have to locate them. What you're seeing is how super-cooled water (like what's in the atmosphere) can turn into ice crystals when it encounters warmer air (like what's in the room where the experiment takes place). There are real conspiracies out there, and there is real sickness. 1). [Response: Contrail cirrus clouds are both weather modification and geoengineering solar radiation management (SRM). Therefore, contrails can add to the natural cirrus coverage when T < - 39°C and 100% < Rhi < 150% and no natural cirrus cloud is already present (Fig. Contrails - National Weather Service "This suggests that the high-cloud increases are at least partly related to the presence of aviation and contrails.". On days where the contrails disappear quickly or don't even form, they can expect continuing good weather, while on days where they persist, a change in the weather pattern may be expected. Claims by experts in Murphy's film state that respiratory mortality in the US have increased in the past six years directly implying that chemtrails must be the cause of this increase. Campbell's Weather Compendium Contrails, Cirrus Trends, and Climate 1. Found inside – Page 143Clouds arranged in bands or connected with cirrostratus or altostratus , may be a sign of approaching bad weather . ... Kelvin - Helmholtz Waves Cirrostratus Nebulosus with halo Contrail being dissipated by high altitude winds . Plane Contrails Have a Surprising Effect on Global Warming. Soot, small metal particulates, and other aerosols deposited by the plane can also “nucleate” ice crystals, essentially seeding the production of contrail clouds. Drawback: does not address ocean acidification issue. – An airplane left an odd contrail in the sky above St. Louis this morning. “likely contrails are affecting precipitation to a much greater extent than are present deliberate seeding operations.”. National Oceanic & Atmospheric Administration, Earth from Orbit: GOES-T Arrives at Kennedy Space Center, NOAA’s GOES-T Satellite Arrives in Florida Ahead of 2022 Launch. Contrails are composed primarily of water, in the form of ice crystals. Image courtesy of Andrew Carleton. Found insideWeather Information, Economic Planning, and Business Management W. J. Maunder. temperatures, should be considered 'negative' ... The results of the model suggested that the benefits of modification through contrail clouds could on very ... Do Contrails Affect Conditions on the Surface? 2001). Found inside – Page 5They should be conducted with a greater variety of contrail cirrus clouds . ... ice crystals formed in contrails under a variety of weather conditions particularly as they may artificially seed lower clouds and stimulate precipitation ... “Particularly for the South and Southeast [Bernhardt] showed that, yes, stations underneath the contrails had a suppressed diurnal temperature range versus stations a bit further away,” Carleton said. Contrails are condensation trails left in the sky when the water in aircraft engine exhaust condenses to form artificial clouds. Description A trail of cloud which forms behind an aircraft flying, usually at high level, in moist and very cold air. Found insideCumulonimbus Clouds – Towering up to 50,000 feet high, these clouds bring most kinds of bad weather – rain, hail, sleet, thunder, lightning and, in extreme cases, ... Contrail Clouds – Thin lines of vapour from jet engines that have ... Found insideYou've probably seen a type of aerodynamic contrails if you've ever landed in a plane in damp weather. Condensation clouds form over the wing because the air flowing over the top of the wing drops in pressure. If it's humid enough this ... A beautiful display of cirrus clouds and contrails in the northern sky over Oakton, Va., on Wednesday morning. Cirrus clouds are globally distributed, being present at all latitudes and without respect to land or sea or season of the year. A cirrus and contrail display. Contrail. Two States Sue Airlines Over “Smoke Pollution of the Skies”. Image: Cumulonimbus clouds. Photo: Getty Images Why does it matter? Shadows of the high ice clouds formed after the passage of a plane in the high altitudes (contrails) are well seen over these stratus fields — in many instances better than the contrails themselves. Since the beginning of 2021, Eurocontrol's Maastricht Upper Area Control Centre (MUAC), in partnership with the German Aerospace Center, … the coupling between cloudiness and surface air temperature. But the atmospheric phenomenon wasn't explained scientifically until 1953, when meteorologist H. Appleman published a scientific paper about them. This is based on a misunderstanding of how contrails form, persist and spread. The most striking cirriform cloud features are produced by weather disturbances in midlatitudes. Those puffy, straight, thin clouds produced by an aeroplane. Contrail layers from Arctic MM5 and Air Force Weather Agency (AFWA) MM5 models agree well with contrail layers derived from corresponding radiosonde measurements for certain forecast periods; a steady decrease of the MO shows a decrease of … contrail, also called condensation trail or vapour trail, streamer of cloud sometimes observed behind an airplane flying in clear cold humid air.A contrail forms when water vapour produced by the combustion of fuel in airplane engines condenses upon soot particles or sulfur aerosols in the plane’s exhaust. Mysterious clouds opened up the skies of the upper Midwest over the weekend, treating some who looked up to a rare view. The varying humidity and temperature in the atmosphere affect the formation of contrail clouds. "Weather forecasting of daytime highs and lows do not include contrails," says Andrew Carleton. [3] Contrails during day cause cooling because of reflecting of sunlight back into space. For that, only the long-wave warming effect of cirrus clouds should be targeted, and their solar effect should be avoided. Upload your best active weather photos and videos or watch them in our new searchable gallery. If the humidity is low and the temperature is not cold enough (above -40 degrees Fahrenheit) contrails will dissipate quickly. If the conditions … NASA and the DOE are sponsoring a research program to study the impact contrails have on atmospheric chemistry, weather and climate. Cirrocumulus clouds appear in layers that look like rippled sand or fish scales. Found insideThe Science, History, and Culture of Clouds Gavin Pretor-Pinney. 2 Hersh, Seymour M.: 'Rainmaking Is Used As Weapon by U.S.', published in the New York Times, 3 July 1972. 3 Frisby, E.M.: 'Weather Modification in Southeast Asia, ... Found inside – Page 64RARE CLOUDS High - level trails Contrails usually occur above 20,000 ft ( 6,000 m ) . SHOWTIME IN THE SKY Even if you are familiar with the " regular " cloud types , you may still spot some rare and unusual clouds . 6, 261–271 (1999) Influence of weather conditions on the distribution of persistent contrails Martina Kästner, Richard Meyer and Peter Wendling, DLR Oberpfaffenhofen, Institut für Contrails are human-made clouds. A plethora of government agencies, scientific organizations, and industry bodies are involved in discussing how to deal with and/or take advantage of … Found inside – Page 143CONDENSATION TRAILS HAZE LAYERS CANOPY STATIC ICING THUNDERSTORMS Chapter 14 ARCTIC WEATHER ... popularly contracted to “ contrail , ” is generally defined as a cloud - like streamer which frequently is generated in the wake of aircraft ... Scientists have found that cirrus clouds, formed from aircraft engine exhaust, are capable of increasing average surface temperatures enough to account for a warming trend in the United States that occurred between 1975 and 1994. Found inside – Page 16Especially contrails . Those long slender ice crystal clouds seen forming in the wake of a high flying jet are caused by the exhaust of moisture and heat from the aircraft's engines . The term " contrail " comes from combining ... Contrails are a concern in climate studies as increased jet traffic may result in an increase in cloud cover. That patent was related to research into the idea that seeding the upper atmosphere with reflective particles might slow global warming by reflecting sunlight back into space. Nicknamed ‘mackerel sky,' they are considered an omen of good weather. 27798 views Contrails may potentially impact DTR as expected by Travis et al. But there is no scientific way to back up their claims. The Earth has…. The entire length can be seen to have detail, and no drift with wind currents - except at the poles which isn't mentioned in the video. "We downloaded the data from the NOAA CLASS website, for multiple times per day to cover the conterminous United States. There is no scientific evidence linking the formation of contrails with illness. We tend to observe them in empty skies in high pressure situations when there are very few other clouds around. “The temperature increases related to global warming could be made worse in areas where you have a lot of contrails,” said Carleton. Contrails and other clouds formation caused by human activities are collectively named homogenitus. However, these clouds are not associated with any weather. Later, in a paper published in the International Journal of Climatology in 2015, Carleton and PhD student Jase Bernhardt looked at the relationship between persistent contrails and temperature conditions, particularly in regard to what’s known as the diurnal temperature range (i.e., the difference between the daytime high temperature and the nighttime low temperature). After mapping the areas in which contrails were most likely to occur, the researchers then investigated the proposed link between increased aviation and the increase of contrails (also referred to as non-opaque, cirrus-like clouds) by comparing climate records on clouds from ground- based weather stations beneath and further away from well-traveled flightpaths. Those line-shaped clouds flowing out behind planes as they traverse the sky are known as condensation trails or ‘contrails’ for short. “If you have variations at the earth’s surface in that diurnal temperature range, or just in the daytime high or the nighttime low, those differences could change local-scale wind patterns, which could have impacts for pollution dispersal near the Earth’s surface.”, This AVHRR infrared image shows a "clear sky” contrail outbreak over Kentucky in October 2002. Removal of longwave trapping cirrus and upper tropospheric water vapour. … Advantage: seeding aerosol residence time is relatively short in the troposphere. Found inside – Page 140Contrails are modifying the cloud cover along heavily traveled air corridors between major urban areas with possible implications for weather and climate . According to some studies , contrails already cover about 5 % of the sky in some ... contrail, also called condensation trail or vapour trail, streamer of cloud sometimes observed behind an airplane flying in clear cold humid air.A contrail forms when water vapour produced by the combustion of fuel in airplane engines condenses upon soot particles or sulfur aerosols in the plane’s exhaust. [1] Illinois and New Jersey of [...] The bill never made it out of committee. But small changes in … At flight altitudes, conditions that can support contrail-generated cirrus clouds exist 10 - 20% of the time in clear air and within existing cirrus (Gierens et al. "Essentially, the Midwest—Illinois, Indiana, into Ohio also including Kentucky – the Southeast, and the Northeast are the primary areas where the satellite shows the contrails as being most persistent," said Carleton. They form in air above about 25,000 feet, when that air is moist and colder than -40 degrees Celsius. But if that's true, we'd have to contemplate the reality of the other threats Kucinich mentioned in the bill, including extraterrestrial weapons, tectonic weapons and psychotronic weapons. Contrails are formed from extremely cold air mixing with hot exhaust gasses. An example of very persistent contrails is shown in the S'Cool cloud chart. If the contrails are long, the moisture content of the upper atmosphere sky is high and more clouds or even a storm is on the way. Contrail formation is most likely at altitudes at or above 35,000 feet and at temperatures below -58°F (-50°C), therefore contrails are mostly formed by jets. The wispy ice clouds formed by jet exhaust help trap heat near the Earth's surface. Most aged contrail-cirrus are not differentiable and are not counted as aircraft generated. contrails occur in any region where long-living con-trails are possible. And if you're concerned about the environment, a good way to deal with that might be to join environmental movements to prevent all the scientifically-measured and quite real threats to our planet from carbon emissions and toxic waste. Active Weather Dawn over Weyburn with Clouds and a Contrail. The clouds are what make the sky look so interesting. Many proponents have interpreted this statement to be an admission of chemtrail use by the federal government. Found inside – Page 453Additional clouds in a warmer world would not would tend to provide a small positive feedback on the necessarily have a net cooling ... This situation FOCUS ON A SPECIAL TOPIC Contrails and Climate Change uman activities can have an ... ST. LOUIS, Mo. Berlin, Germany (SPX) Nov 04, 2021. stock image only. For information about why NASA studies contrails, read: Clouds Caused By Aircraft Exhaust May Warm The U.S. Found insideLike most other clouds, cirrus will cover more of the sky and thicken if worse weather is on the way. ... Contrails. Passenger aircraft fly in the same high part of the troposphere as the cirrus clouds we see. The exhaust from their jet ... Contrails - short for "condensation trails" or vapor trails - are line-shaped clouds sometimes produced by aircraft engine exhaust, typically at aircraft cruise altitudes several miles above the Earth's surface. 1999). Graphic courtesy of Andrew Carleton. According to research from Pennsylvania State University, jet contrails can influence ground temperature, reducing the difference between the day's highs and lows. 2008a, section 2e). Contrails often form over large areas during winter and spring. So Thomas work steered the chemtrail conspiracy away from weather control for combat, and into weather control for combatting global warming. This can be achieved if seeding is limited to high-latitude winters or to nighttime seeding. Found insideFair weather cirrus cloud CONTRAILS Abnormally thick condensation trails (contrails) can indicate a warm or occluded front arriving in 12 – 24 hours. Contrails are formed by water vapour condensing around aircraft exhaust particles and ... In the US, artificial clouds tend to move eastward. The fact is that people are suffering from respiratory illness in huge numbers in the U.S., and that is a tragedy. Found inside – Page 368cloud ceiling, 116 clouds absorbing sunrays, 45 altocumulus, 112 altostratus, 113 atmosphere and, 103 banner, 120 billows, 119 cirrocumulus, 111 cirrostratus, 111 cirrus, 110 contrails, 120–121 convective, 116 cumuliforms, 108, ... Cirrocumulus with contrail shadow Cirrocumulus with contrail shadow Baker, Nick 2005-07-01 00:00:00 Figure 1 was taken at 1018 UTC on 11 November 2004, at South Darenth, Kent. The researchers then imported the AVHRR images into ERDAS (software that allows users to prepare, display and enhance digital images for mapping) to determine when and where contrails occurred, derived their latitude and longitude, and then mapped them. Contrails are generally classified into two types. Looking over the Central South Germany with the VIIRS instrument (Figure 1) one can easily spot the unusual curvy lines in the stratus field. This amount of aluminum is well within the normal range for soil. Contrails can last for seconds, hours or even a day in the atmosphere - and this determines the climate impact of a particular contrail will have. The condensation is visible from the ground, appearing to look like pencil thin lines of 'cloud.'. Pertaining to the discussion, contrail-cirrus as clouds: Induce a cloud-feedback, i.e. Many believed that contrail clouds were a new phenomenon, delivering dangerous "geoengineering" chemicals that were making them sick. But this was actually due to a decrease in the mortality of strokes; respiration mortality rates did not change. On the other, they absorb and re-emit infrared radiaton, both upwards and downwards.

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