Jet contrails as seen by satellite. Credit NASA Langley Research Center

#AGU15 Accidental Geoengineering? Airline traffic may help create an icy haze that’s brightening U.S. skies

SAN FRANCISCO, CALIFORNIA —The data just didn’t seem to make sense. That’s often the story right before scientists make a leap in understanding. In this case, scientists had some evidence that skies in the continental United States have been brightening, after several decades of so-called “dimming.” Brightening and dimming are overly simplified words that signify…

Sunset haze over State College-, PA source: NOAA SPC

Claim: A warmer world will be a hazier one

From the UNIVERSITY OF CALIFORNIA – RIVERSIDE and the Department of Modeled Inconsistent Results comes this unlikely claim: that there will be more of an aerosol load with global warming. Right – negative feedback anyone? A warmer world will be a hazier one Using a suite of computer models, UC Riverside-led study finds most aerosol species…

dirty-snow

Scientists Link Earlier Melting Of Snow To Dark Aerosols

From NASA Goddard: Tiny particles suspended in the air, known as aerosols, can darken snow and ice causing it to absorb more of the sun’s energy. But until recently, scientists rarely considered the effect of all three major types of light-absorbing aerosols together in climate models. In a new study, NASA scientists used a climate…

Jet contrails as seen by satellite. Credit NASA Langley Research Center

No surprise here: Jet contrails affect surface temperatures

From Penn State High in the sky where the cirrus ice crystal clouds form, jet contrails draw their crisscross patterns. Now researchers have found that these elevated ice cloud trails can influence temperatures on the ground and affect local climate, according to a team of Penn State geographers. Video follows. “Research done regarding September 2001,…