Tag: climate change

Climate extremes have big effect on wheat yields

New index helps project changes

Grain crops are very vulnerable to climate change impacts. @bberwyn photo.

Staff Report

Farmers have known it for generations that heatwaves, drought and extreme rain are a bad recipe for growing wheat, and now scientists have quantified those impacts. Heat stress, combined with drought or excessive rain is responsible for about 40 percent of the changes in wheat yields from one year to another.

That’s bad news in a world that’s expecting extreme weather to intensify in the coming decades, but at least the stress index developed scientists with the European Joint Research Centre will help communities plan ahead and ameliorate at least some climate change impacts. Continue reading “Climate extremes have big effect on wheat yields”

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Increased greening amplifies global warming in boreal zones


New research focuses on biophysical impacts of climate change

Greenhouse gases speed plant growth. How will that affect global temperatures? @bberwyn photo.

Staff Report

Vegetation plays a key role in the climate change equation, with a recent study showing that vegetation density has substantial climate impacts. According to the research by the European Union’s Joint Research Center, the findings show that vegetation has a warming effect in cold areas and cooling effect in warm areas.

Figuring out the net effect would help develop more integrated and effective climate mitigation and adaptation strategies. The puzzle is complex. Increasing greenhouse gases spur vegetation growth, but the overall effects at the global level are not clear. The new study explores how changes in leaf area (a measure of vegetation density) affect local climate. Continue reading “Increased greening amplifies global warming in boreal zones”

Sunday set: Wildflower love

Alpine beauties

Some wildflower love from Austria spanning the last couple of months, from first sprouts emerging through the remnant muck of winter, to forest orchids. Check out the Summit Voice photo archives for more wildflower shots from around the world, and visit our online gallery to purchase fine art nature and landscape prints.

Many wildflower species are under the gun from climate change, especially in the mountains, where they will be pushed out of their habitat. Other studies have documented how global warming will affect native plant diversity in California. The changes to plant communities will ripple through ecosystems, affecting insect and birds, as many studies have shown.

 

Gradual CO2 buildup can trigger sudden climate tipping points

A new study links rising CO2 concentrations with disruptions to key climate-controlling currents during ice age climate shifts.

Ice age ocean current disruptions linked with greenhouse gas changes

Staff Report

Scientists say they’ve discovered another huge climate warning sign in the Arctic. Past increases in CO2 levels in the air drove ocean currents to a tipping point had a big impact on hemispheric weather patterns.

Within the span of just a few decades, rising CO2 concentrations drove temperatures in Greenland up by 10 degrees Celsius, according to a new study led by researchers with the Alfred Wegener Institute and the University of Cardiff. Continue reading “Gradual CO2 buildup can trigger sudden climate tipping points”

Global warming puts sea turtles at risk

As temps warm, most eggs will produce females

If beaches get too warm, sea turtle eggs will hatch mostly as females. @bberwyn photo.

Staff Report

Global warming was first identified as a potential threat to sea turtles in the 1980s because the temperature at which the eggs incubate helps determine the sex of the embryos. A new study now adds weight to those concerns, finding that  warmer temperatures could lead to higher numbers of female sea turtles and increased nest failure, negatively on the turtle population in some areas of the world. Continue reading “Global warming puts sea turtles at risk”

E-cars could go mass-market by 2030, IEA says

2 million e-cars on the road in 2016

E-car charging station, Vienna. @bberwyn photo.

Staff Report

Electric cars are likely to reach mass market adoption within the next decade, according to the International Energy Agency’s latest report on e-mobility. In 2016, the number of electric cars on the road globally reached 2 million, with China accounting for 40 percent of that total.

China has also deployed more than 200 million electric two-wheelers, as well as 300,000 elecric buses and leads the globe in electrification of the transport sector. China, the US and Europe made up the three main markets, totalling over 90 percent of all electric vehicles sold around the world.

Outside China, Norway is also moving ahead swiftly on electrification, with e-cars holding a 29 percent market share, the highest globally by far. The Netherlands is next, at 6.4 percent, followed by Sweden, at 3.4 percent. Continue reading “E-cars could go mass-market by 2030, IEA says”

Earth to Pruitt: Paris is still on!

EPA chief continues to alienate important allies

This now seems to be a bit of prescient moment during the COP 21 talks in Paris. @bberwyn photo.

By Bob Berwyn

The U.S. government continues to show how out of tune it is with the rest of the world’s leading economic nations with a press release from the EPA claiming that it has “reset” the conversation about climate change to reflect the Trump administration priorities and the “expectation of the American people.”

Apparently, EPA Administrator didn’t get the clear message from scores of American cities and states that responded to Trump’s withdrawal from the Paris climate agreement by forming a sub-national coalition that is aiming to uphold the goals of that agreement. The We Are Still In Group also includes hundreds of counties, universities and businesses committed to the agreement, so all Pruitt is managing to do is to divide the country. Continue reading “Earth to Pruitt: Paris is still on!”