Sinclair hit by ransomware attack, TV stations disrupted

Sinclair Broadcast Group, which operates dozens of TV stations across the U.S., said Monday that some of its servers and work stations were encrypted with ransomware and that data was stolen from its network.

Energy & Green Tech

Hydropower decline adds strain to power grids in drought

After water levels at a California dam fell to historic lows this summer, the main hydropower plant it feeds was shut down. At the Hoover Dam in Nevada—one of the country's biggest hydropower generators—production is ...

Energy & Green Tech

Towards for a power grid that is resilient to short circuits

You're just sitting there, working or watching television, and bang, the power goes out. Everyone knows how annoying it is to search for candles in a cold, dark house or office during a power failure. But due to excavation ...

EU legal advisor: Diesel software faces strict limits

A top European Union legal adviser said Thursday that software installed in Volkswagen cars to alter the amount of pollutants coming out of their exhaust pipes in hot or cold weather and at high altitude doesn't conform to ...

Energy & Green Tech

Restoring power during severe storms

With severe weather and natural disasters becoming more intense in a changing climate, a group of Georgia Tech researchers studied how recovery, guided by common policies from FEMA and industry, varies with respect to the ...


As flood alerts lit up phones, did 'warning fatigue' set in?

Cellphones across New York and New Jersey pulsed with urgent warnings of catastrophic flooding as the fury of Hurricane Ida's remnants, carrying torrential rains, approached upper New Jersey and New York City on Wednesday.

page 1 from 10


Weather is a set of all the phenomena occurring in a given atmosphere at a given time. Weather phenomena lie in the troposphere. Weather refers, generally, to day-to-day temperature and precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of time. When used without qualification, "weather" is understood to be the weather of Earth.

Weather occurs due to density (temperature and moisture) differences between one place and another. These differences can occur due to the sun angle at any particular spot, which varies by latitude from the tropics. The strong temperature contrast between polar and tropical air gives rise to the jet stream. Weather systems in the mid-latitudes, such as extratropical cyclones, are caused by instabilities of the jet stream flow. Because the Earth's axis is tilted relative to its orbital plane, sunlight is incident at different angles at different times of the year. On Earth's surface, temperatures usually range ±40 °C (100 °F to −40 °F) annually. Over thousands to hundreds of thousands of years, changes in Earth's orbit affect the amount and distribution of solar energy received by the Earth and influence long-term climate

Surface temperature differences in turn cause pressure differences. Higher altitudes are cooler than lower altitudes due to differences in compressional heating. Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location. The atmosphere is a chaotic system, so small changes to one part of the system can grow to have large effects on the system as a whole. Human attempts to control the weather have occurred throughout human history, and there is evidence that human activity such as agriculture and industry has inadvertently modified weather patterns.

Studying how the weather works on other planets has been helpful in understanding how weather works on Earth. A famous landmark in the Solar System, Jupiter's Great Red Spot, is an anticyclonic storm known to have existed for at least 300 years. However, weather is not limited to planetary bodies. A star's corona is constantly being lost to space, creating what is essentially a very thin atmosphere throughout the Solar System. The movement of mass ejected from the Sun is known as the solar wind.

This text uses material from Wikipedia, licensed under CC BY-SA