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Microparticles in aerosols increase rain and wind

10.02.2018

Researchers at the University of Maryland have studied how particles of various sizes flying through the atmosphere change the intensity of rain, wind and other weather events. They found that very small aerosol particles (up to 50 nanometers in diameter) significantly accelerate convection and precipitation.

The experiments were carried out in the Brazilian state of Amazonas, where the air is still quite clean. Such a place was chosen to minimize the influence of those particulate matter that are already in the atmosphere in the area. Weather phenomena over part of the state of Amazonas were observed with the help of special instruments. We also built computer models of the influence of very small aerosol particles on air humidity and the formation of large water droplets in clouds.

It turned out that very small particles very intensively collect water drops around them, if there are practically no larger solid particles in the atmosphere. This is especially evident in a warm and humid climate, such as in the territory of Amazonas. When water droplets form, heat is released, and the air heated by this heat rises quickly, that is, intense convection occurs. In this case, the relative humidity of the air can significantly exceed 100 percent. Atmospheric currents are becoming more intense, as a result of which precipitation is accelerating and wind is increasing.

It was previously thought that particulate matter less than 50 nm in diameter was simply too small to play a significant role in atmospheric phenomena. Therefore, they were practically not studied in this context. The results obtained indicate that anthropogenic pollution of the atmosphere and the impact of this pollution on the weather and climate is manifested even where people are not active. Indeed, very small aerosol particles due to their exceptionally low weight can be carried over greater distances than large ones.

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Wearable electronics instead of a PC 22.07.2013

Dell is considering entering the wearable electronics market, according to the Guardian, citing Sam Burd, Dell's vice president of personal computing. "We are exploring various ideas in this area," he said.

“While such devices are quite laborious to produce and it is not yet clear how to make them truly user-friendly. However, a smart watch on your wrist is a very interesting and attractive idea,” Bird commented.

Device form factors will continue to change over the next 5 years, according to a Dell spokesperson. Demand for desktop PCs will continue, but it will be small compared to mobile devices. The put on electronics - one of the most perspective directions, consider in Dell. This opinion is shared not only by Dell, but also by Google, which in April 2013 released a trial batch of Google Glass augmented reality glasses intended for application developers. The cost of the device was $1,5 thousand.

With a tiny LCD screen placed a short distance from the eye, Google Glass is able to show the route and messages from a mobile phone to which they are connected via Bluetooth. The device belongs to the segment of wearable electronics, as it is worn on the body. Google plans to release it to the general public in 2014.

According to Juniper Research forecast, 2013 million such devices will be sold in the world in 15, which also include smart watches Sony SmartWatch, Nike FuelBand, as well as various medical sensors and devices. By 2017, the market volume, according to analysts, will increase to 70 million devices.

According to some information, "smart" watches are also being developed by Apple. In an interview at the D11 conference in May, Apple CEO Tim Cook said that the company is also interested in this area, stressing that a device worn on the wrist is more interesting from a commercial point of view, as it forces people to wear glasses. more difficult.

Dell's entry into a new market could help improve its financial performance, notes the Guardian, and better prepare for the post-PC era. Dell is the world's third largest personal computer maker, but demand has been declining lately in favor of devices in newer form factors. According to IDC, in the first quarter of 2013, PC shipments to the global market decreased by 14%, and last year - by 3%.

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