If you think that summers are getting hotter, you could be right -- depending on where you live. Summers are heating up if you live in or near any major U.S. city. But in rural areas, temperatures have remained relatively constant.
"What surprised me was the difference in the extreme temperature trends between rural and urban areas," says Arthur T. DeGaetano, Cornell associate professor of earth and atmospheric sciences, who reviewed temperature trends from climate-reporting stations across the United States over the past century and examined data from the last 40 years in greater detail. "I expected maybe a 25 percent increase for the urban areas compared to the rural ones. I didnt expect a 300 percent increase across the U.S."
Because of population growth in urban and suburban areas over the past four decades, particularly in major East Coast cities, there are more hot summer nights than ever, says DeGaetano. "This means that cities and the suburbs may be contributing greatly to their own heat problems," he says. "Greenhouse gases could be a factor, but not the one and only cause. There is natural climate variability, and you tend to see higher temperatures during periods of drought."
Blaine P. Friedlander, Jr. | EurekAlert!
Early organic carbon got deep burial in mantle
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More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
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