Lightning expected to increase by 50 percent with global warming

Jay OwenEarth Systems Science

ScienceDaily: Top Environment News



 

Lightning expected to increase by 50 percent with global warming

Posted: 13 Nov 2014 11:21 AM PST

Atmospheric scientists looked at predictions of precipitation and cloud buoyancy in 11 different climate models and concluded that their combined effect will generate 50 percent more electrical discharges to the ground by the end of the century because of global warming. The main cause is water vapor, which fuels explosive deep convection in the atmosphere. The more convection, the greater the charge separation and the more cloud-to-ground strikes.

Magnetic fields frozen into meteorite grains tell a shocking tale of solar system birth

Posted: 13 Nov 2014 11:21 AM PST

Astrophysicists say that magnetic clues in a meteorite outline the earliest steps in the formation of the solar system and Earth-like planets.

Alaska shows no signs of rising Arctic methane, NASA study shows

Posted: 13 Nov 2014 10:48 AM PST

Despite large temperature increases in Alaska in recent decades, a new analysis of nasa airborne data finds that methane is not being released from Alaskan soils into the atmosphere at unusually high rates, as recent modeling and experimental studies have suggested. The new result shows that the changes in this part of the Arctic have not yet had enough impact to affect the global methane budget.

Ocean primed for more El Niño, experts say

Posted: 13 Nov 2014 09:31 AM PST

Salinity and temperature records from corals in a remote Pacific island in Kiribati show the ocean has warmed over the last sixty years and has set up the conditions for stronger El Niño weather events, which could significantly affect Australian weather.

Combatting illegal fishing in offshore marine reserves

Posted: 13 Nov 2014 08:03 AM PST

Conservation scientists say there needs to be a new approach to protecting offshore marine reserves. They have found a way to predict illegal fishing activities to help authorities better protect marine reserves.

Switching on a dime: How plants function in shade, light

Posted: 13 Nov 2014 04:51 AM PST

Plants grow in environments where the availability of light fluctuates quickly and drastically, for example from the shade of clouds passing overhead or of leaves on overhanging trees blowing in the wind. Plants thus have to rapidly adjust photosynthesis to maximize energy capture while preventing excess energy from causing damage. So how do plants prevent these changes in light intensity from affecting their ability to harvest the energy they need to survive? The response has to be extremely swift.

Genetic tweak gave yellow fever mosquitoes a nose for human odor

Posted: 12 Nov 2014 05:33 PM PST

One of the world’s deadliest mosquitoes sustains its taste for human blood thanks in part to a genetic tweak that makes it more sensitive to human odor, according to new research.