What kind of smog those airplanes release into my clear blue sky?
I often see small airplanes across the clear blue sky leaving sort of smoke/fog forming a line spliting the air. The airplanes go back and forth and in time the sky is not as beautiful as it was with those smog spreading all over.
Are they trying to create clouds in dry weather to induce rain? For what its worth I hate see my clear blue sky ruined.
Condensation trails or contrails often appear behind aeroplanes. During the Second World War, bomber and fighter pilots noticed that they left contrails at some levels but not at others. On a day when contrails were happening, the safest level to fly was just below the level at which they occurred. Any enemy aircraft higher up would be leaving a trail and would be easy to see. This led to a study of contrails and a method of predicting the level at which they would occur was devised.
There are two different types of condensation trail. If you are in an aeroplane on a day with showers around, look at the wings as the plane descends. You will see a trail of what looks like grey smoke streaming from the end of the wing. The motion of air across the wing creates a vortex at the wing tip. The drop in pressure across the vortex is enough, on a humid day, to cause the water vapour to condense into cloud droplets and this is seen streaming from the wing tip. These condensation trails evaporate quickly behind the plane.
The trails we see high in the sky are made by the engines, not vortices at the wing tips. When fuel is burnt, water vapour is produced. We can see this coming from car exhausts on frosty mornings. The water vapour in the hot exhaust gases condenses in the cold air. The same thing happens with aircraft exhausts and the condensed water droplets leave a visible trail behind the aircraft. If the air is dry, the water droplets quickly evaporate and the contrail disappears. If the air is moist, the contrail can last a few minutes before it evaporates.
Water vapour will not spontaneously condense into water droplets. The water has to condense onto something. These are called condensation nuclei. Salt and dust particles are common nuclei. Smoke particles are also good nuclei. If the air is very clean and lacking in condensation nuclei it can become supersaturated. There is plenty of water vapour in the air but it can't condense. An aeroplane flies through this supersaturated air pumping out not only water vapour but also billions of smoke particles onto which the water vapour can condense. A condensation trail forms and stays for a long time. Sometimes these trails can spread out to form a sheet of cloud across the sky.
If you want some amusement, you should look up "chemtrails" on your favourite search engine. There is a major conspiracy theory that condensation trails are attempts by the government to poison the population. This is not the case and never has been.
A rare form of trail is the dissipation trail or distrail. As a plane flies through high-level cloud, the heat from the engines evaporates the cloud cutting a clear line through the cloud. Distrails can be confused with the shadows of contrails. A contrail above a thin layer of cloud will cast a shadow on the cloud layer leaving an odd-looking dark line. It is particularly strange if the cloud layer cannot be easily seen.
Sky Blue FC of WPS on Fifth Coach in 14 Months
Sky Blue FC of Women's Professional Soccer on fifth coach in 14 months after another firing Sky Blue FC - Sports - Coach - Soccer - CONCACAF Allman Brothers Band - Blue Sky
Many Hospitals Move To Color Coding Departments And Staff Members, Blue Sky Scrubs Works To Accomodate The Many Requests
Austin, TX -- Recently, many hospitals such as those in Minnesota, Wisconsin, and Presbyterian Hospital in Albuquerque, NM have made a shift in uniform requirements. Where nurses used to greet their pediatric patients with cheery Scooby Doo scrub tops, which would show that they are amicable and friendly to the children in that ward, they are now often required to wear one assigned solid color or a combination of two colors. While many would think this may stifle individuality, it has become a decision that many doctors, nurses, and other medical professional respect and support. Additionally, the patients are relieved by the changes as well. There aren't too many places people go that create the same level of anxiety and stress -- before even stepping inside -- as does a hospital. Having each department instantly recognizable helps the patient have confidence in the medical care he or she is about to receive.
blue sky scrubs adds many new colors to their existing scrub line.
Medical scrubs promote a clean, crisp image and first impressions are very important, not only in personal and business settings, but also in a hospital where a patient should feel as relaxed and at ease as is possible. Having the ability to distinguish between nurses, doctors, and other staff is key in easing a patient's mind and allowing for them to feel safe knowing who is caring for them and who to call on when they need medical attention.
Hospitals have made these changes not only for the patient's benefit, but also for the benefit of the staff. Choosing a nursing uniform is part of a medical professional's career that has immediate affects on those they work with as well as those they work around. For example, in emergency situations, the new requirement to wear color coordinated nursing scrubs can immediately give nurses and their colleagues a visual cue, alerting them to who they can call on for assistance even if they don't know their coworkers.
Nursing scrubs have been a significant part of the nursing field for over a century. Modern-day medical scrubs do not stop at functionality and are much more practical for today's faster paced society. Hospitals realize that a nurse is usually the first person someone sees when they enter the hospital, and often the last person they see on their way out. Having the new color requirement ensures the image hospitals are wanting to maintain and allowing nurses and other medical professional to be at ease knowing they are wearing the "right thing." Labor and Delivery Nurse Mary Elias says, "When I am getting ready for work, the last thing I need to think about is whether or not something looks 'good' on me or if it's not comfortable or if it matches. It's nice that the hospital where I work has chosen the color for me, as that's one less thing to think about in a very hectic and stressful department. All of my attention needs to be devoted to my patients and none of my attention needs to be worrying about what I am wearing." Elias also says, "Don't get me wrong - I do like to look and feel good at work, so I sometimes throw a little style in the mix and splurge on a pair of blue sky scrubs, instead of always wearing the scrubs the hospital provides."
At most hospitals, as long as the color is correct, the brand is the decision of the employee. However, many of these colors are not offered by all scrub manufacturers. blue sky scrubs CEO David Marquardt says, "Our clients decide our products. We have recently added to our scrub line many new colors, all of which have been suggestions from our clients. We are hoping to offer all of the colors requested by the end of the year." blue sky scrubs did not previously offer Royal Blue, a color required by Memorial Hermann in Houston, TX, but thanks to the many email requests from medical personnel, blue sky scrubs now carries the color. Another color request was "O.R. Green" or "Surgical Green," which is one of blue sky scrubs' most recent additions, thanks to the many requests from the Emergency Room staff at Brackenridge Hospital in Austin, TX. Pine Green (also called Hunter green), and Pink and Turquoise (for the staff members who work on a Labor and Delivery team in Houston, TX) are also colors requested by staff members who are required to be color-coded. When asked if there were any other pending scrub colors, Marquardt answered, "We have recently had a number of requests for 'Caribbean Blue' and, of all colors I would not have expected to offer, white. We are hoping to find our special fabric in Caribbean Blue and we are also hoping to find a white fabric that is resistant to stains." Marquardt also said, "blue sky scrubs is constantly working to ensure that everyone who orders our scrubs is 100% satisfied."
If you would like to receive a free scrub top with purchase, visit www.blueskyscrubs.com and add both a scrub hat and a Simple scrub top to your cart. During checkout, enter code BS1ST40 and your cart will be deducted the price of the Simple scrub top. This offer is good through February 28, 2009.
About the Author
About blue sky scrubs blue sky scrubs are the makers of the finest and most fashionable medical scrubs and scrub caps available. blue sky scrubs have quickly become a must-have accessory for doctors, nurses, surgeons, and other medical professionals worldwide. blue sky's nursing scrubs and scrub hats are not sold in any retail stores, they can only be purchased online at www.blueskyscrubs.com. Contacts blue sky scrubs Andrea Mueller, 512-420-9018 admuel@gmail.com
