Category: science

The Global Rightward Shift on Climate Change

The Global Rightward Shift on Climate Change: undefined

Climate change will make hundreds of millions …

Climate change will make hundreds of millions more people nutrient deficient:

Previous research has shown that many food crops become less nutritious when grown under the CO2 levels expected by 2050, with reductions of protein, iron and zinc estimated at 3–17%.

Now experts say such changes could mean that by the middle of the century about 175 million more people develop a zinc deficiency, while 122 million people who are not currently protein deficient could become so.

In addition, about 1.4 billion women of childbearing age and infants under five years old will be living in regions where there will be the highest risk of iron deficiency.

Among other problems, zinc deficiencies are linked to troubles with wound healing, infections and diarrhoea; protein deficiencies are linked to stunted growth; and iron deficiencies are tied to complications in pregnancy and childbirth.

“This is another demonstration of how higher CO2 could affect global health that may not be as well recognised,” said Dr Matthew Smith, co-author of the study from the Harvard TH Chan School of Public Health. “Continuing to keep up our vigilance around reducing CO2 emissions becomes all the more important because of this research.”

Summer weather is getting ‘stuck’ due to Arcti…

Summer weather is getting ‘stuck’ due to Arctic warming:

Rising temperatures in the Arctic have slowed the circulation of the jet stream and other giant planetary winds, says the paper, which means high and low pressure fronts are getting stuck and weather is less able to moderate itself.

The authors of the research, published in Nature Communications on Monday, warn this could lead to “very extreme extremes”, which occur when abnormally high temperatures linger for an unusually prolonged period, turning sunny days into heat waves, tinder-dry conditions into wildfires, and rains into floods.

“This summer was where we saw a very strong intensity of heatwaves. It’ll continue and that’s very worrying, especially in the mid-latitudes: the EU, US, Russia and China,” said one of the coauthors, Dim Coumou from the Potsdam Institute for Climate Impact Research. “Short-term heatwaves are quite pleasant, but longer term they will have an impact on society. It’ll have an affect on agricultural production. Harvests are already down this year for many products. Heatwaves can also have a devastating impact on human health.”

Will Washington State Voters Make History on C…

Will Washington State Voters Make History on Climate Change?: undefined

A Disappointing New Problem With Geo-Engineeri…

A Disappointing New Problem With Geo-Engineering: undefined

Scientists Have Uncovered a Frightening Climat…

Scientists Have Uncovered a Frightening Climate Change Precedent:

The changes that we’ve already set in motion, unless we act rapidly to countervail them, will similarly take millennia to fully unfold. The last time CO2 was at 400 ppm (as it is today) was 3 million years ago during the Pliocene epoch, when sea levels were perhaps 80 feet higher than today. Clearly the climate is not yet at equilibrium for a 400-ppm world.

Trees That Have Lived for Millennia Are Sudden…

Trees That Have Lived for Millennia Are Suddenly Dying:

Common throughout sub-Saharan Africa, the African baobab is one of the biggest flowering plants in the world, and reputedly one of the longest-lived. It’s also known as the upside-down tree, because its bare branches look like roots, or as the monkey bread tree, because of its nutritious and edible fruit. It’s exceptionally long-lived, but recently, several of the oldest baobabs have been dying. Homasi, for example, was part of a grove of seven baobabs, six of which perished within a two-year period.

This isn’t an isolated event. Of the 13 oldest known baobabs in the world, four have completely died in the last dozen years, and another five are on the way, having lost their oldest stems. “These large and monumental trees, which can live for 2,000 years or more, were dying one after another,” says Adrian Patrut from Babes-Bolyai University in Romania, who has catalogued the deaths. “It’s sad that in our short lives, we are able to live through such an experience.”

Don’t turn to the military to solve the climat…

Don’t turn to the military to solve the climate-change crisis: undefined

It’s 50 years since climate change was first s…

It’s 50 years since climate change was first seen. Now time is running out | Richard Wiles:

The anniversary of SRI’s (Stanford Research Institute) report to the API on climate change represents not just a damning piece of evidence of what the fossil fuel industry knew and when, but a signal of all that we have lost over the decades of policy inaction and interference. It should also serve as a potent motivator in the fight for climate accountability and justice.

At the time, CO2 levels in the atmosphere stood about 323ppm. The planet was warming but was still well within the historical norm. Sea levels had risen by about 4in compared with 1880 levels. The report, however, cautioned that “man is now engaged in a vast geophysical experiment with his environment, the Earth” and that “significant temperature changes are almost certain to occur by the year 2000”.

Those predictions proved to be correct: by the turn of the century, the concentration of carbon dioxide in the atmosphere had risen to 369ppm, causing a temperature increase of nearly half a degree over pre-industrial averages. Today, virtually all climate scientists agree there is little or no chance the world can stay within the goal of 1.5C, the limit of what scientists believe to be safe.

Study: Climate Change Probably Won’t Kill All …

Study: Climate Change Probably Won’t Kill All of Us:

And make no mistake: Even if near-term planetary extinction looks unlikely, humanity still has a moral and practical obligation to cut emissions as quickly as possible. The worst-case scenario may be less likely than we thought. But very, very bad scenarios remain almost certain. Climate change is already devastating and destabilizing whole regions of the Earth and increasing the intensity and frequency of extreme weather.