Showing posts with label climate. Show all posts
Showing posts with label climate. Show all posts

Friday, May 25, 2012

Oh bugger...


China spurred a jump in global carbon dioxide (CO2) emissions to their highest ever recorded level in 2011, offsetting falls in the United States and Europe, the International Energy Agency (IEA) said on Thursday.

CO2 emissions rose by 3.2 percent last year to 31.6 billion metric tons (34.83 billion tons), preliminary estimates from the Paris-based IEA showed.

China, the world's biggest emitter of CO2, made the largest contribution to the global rise, its emissions increasing by 9.3 percent, the body said, driven mainly by higher coal use.

"When I look at this data, the trend is perfectly in line with a temperature increase of 6 degrees Celsius (by 2050), which would have devastating consequences for the planet," Fatih Birol, IEA's chief economist told Reuters.

Scientists say ensuring global average temperatures this century do not rise more than 2 degrees Celsius above pre-industrial levels is needed to limit devastating climate effects like crop failure and melting glaciers.
(Reuters, 25 May 2012)

Friday, May 11, 2012

Why can't it rain?


NAIROBI, Kenya—In the sprawling hills of the Kangundo district in Kenya’s Eastern Province, just a few hours outside of capital city Nairobi, Fred Kiambaa has been farming the same small, steep plot of land for more than 20 years.
Born and raised just outside Kathiini Village in Kangundo, Kiambaa knows the ups and downs of agriculture in this semi-arid region. He walks up a set of switchbacks to Kangundo’s plateaus to tend his fields each morning and seldom travels further than a few miles from his plot.
Right now, all that remains of his maize crop are rows of dry husks. Harvest season finished just two weeks ago, and the haul was meager this time around.
“Water is the big problem, it’s always water. We have many boreholes, but when there is no rain, it’s still difficult,” he said.
Kiambaa and his wife, Mary, only harvested 440 pounds of maize this season, compared to their usual 2,200. They have six children, meaning there will be many lean months before the next harvest, and worse: Though March is Kenya’s rainiest month, it’s been mostly dry so far.
“The rain surely is not coming well this year. Rain is the key. We can only pray,” he said.
(From http://www.alternet.org/module/printversion/155376)

The future - our African future - is here. Never mind the cautious weather service spoksepeople saying on air, "It's not unprecedented to have such warm weather in May," or "Of course, we do have years when rainfall is down" - this is a trend. It's years of unusual weather, months when the maxiumum temperatures rise daily (and I mean every day, day after day after day) up to four degrees celsius above normal. Radio presenters burble on about "such fabulous weather!" but we are starting to pay the price - for the global north's and our own South Africa's profligate use of fossil fuels - in poor crops and hunger. (I do hope the myriad stories like Fred Kimabaa's will be taken into account when the rich and powerful put their heads together at Rio+20.)
Last year, I saw a local atmospheric scientist present models of southern African climate for the next 80 years or so. It was one of the defining moments of my life. This is how I described it in the July issue of Skyways magazine:
Pretoria: a lecture room at the Council for Scientific and Industrial Research on a sunny late winter day. The equipment is modern and streamlined, the lecturer is an atmospheric modeller who speaks dispassionately, temperately, calmly, explaining the features of the map on-screen that shows southern Africa. And then he presses a key on his laptop, and all of a sudden, the audience is in a horror movie.
On the screen, the map ticks over with the regularity of a metronome, year by year, decade by decade: 2020, 2030, 2040, 2050… The colours that indicate temperature and rainfall change. Blue turns to peach which deepens to orange, to russet, to scarlet. I scrawl on my notepad, “Namibia, Angola, Botswana, gone, gone, gone!”
It’s been known for a long time that Africa would be one of the hardest-hit regions as climate change kicks in. But somehow, seeing the changes visually represented like this has a visceral effect. It’s got the heart-breaking impact and inevitability of a Greek tragedy.
Dr Francois Englebrecht, an atmospheric modeller at the CSIR, has done a range of models that peek into the future. Six simulations were performed in what is the largest experiment of its kind yet done on African terrain. Each of them gives slightly different results, but all show the same trends in the same areas.
Climatic features of our region dictate that we will buck the trend elsewhere in the world, in which a warmer atmosphere holds more moisture. Southern Africa is going to be warmer and drier. We’re special in yet another way: actual observation shows that over the last century, our temperatures have risen in tandem with the rising temperatures around the world – but our increase is always almost exactly double that of the rest of the world’s average. The models mercilessly show this trend continuing into the far, foreseeable future.



Here’s a telling quote from one of Dr Engelbrecht's colleagues, quoted on www.liveeco.co.za:
Dr Constansia Musvoto from the Council for Scientific and industrial Research (CSIR) told members of the Southern African Confederation of Agricultural Unions (SACAU) that agricultural production in Southern Africa is projected to be halved within the next 70 years as a result of climate change.
“Temperatures will increase by up to 6ºC, while rainfall will drop by as much as 40 percent in some parts of the region.”

Tuesday, March 27, 2012

Smart Alec... NOT!


Caption: Clever monkey

Am I glad I live in South Africa, where laws like this have not been passed (yet). This is a law in Tennessee which will govern how climate change is taught in classrooms.
"...the Tennessee bill is based on an ALEC model bill passed in May 2000. We explained at the time,

'The bill's opening clause reads [PDF], 'The purpose of this act is to enhance and improve the environmental literacy of students and citizens in the state by requiring that all environmental education programs and activities conducted by schools, universities, and agencies shall…'

Provide a range of perspectives presented in a balanced manner.

Provide instruction in critical thinking so that students will be able to fairly and objectively evaluate scientific and economic controversies.

Be presented in language appropriate for education rather than for propagandizing.

Encourage students to explore different perspectives and form their own opinions.

Encourage an atmosphere of respect for different opinions and open-mindedness to new ideas.

Not be designed to change student behavior, attitudes or values.

Not include instruction in political action skills nor encourage political action activities.'


To summarize, under this model bill and its relatives, global warming will be taught as a "theory" among other "credible theories," including those unscientific "theories" peddled by the well-paid "merchants of doubt."

This, of course, flies in the face of the well-accepted scientific consensus, which has proven global warming as the harsh reality, time and time again. The science speaks for itself, and thefossil fuel money funding climate change deniers speaks for itself.

The Tennessee Bill

Key portions of the Tennessee bills are as follows (emphases mine):


"The teaching of some scientific subjects, including, but not limited to,biological evolution, the chemical origins of life, global warming, and humancloning, can cause controversy."

"The state board of education, public elementary and secondary school governing authorities, directors of schools, school system administrators, and public elementary and secondary school principals and administrators shall endeavor to create an environment within public elementary and secondary schools that encourages students to…respond appropriately and respectfully to differences of opinion about controversial issues."

Neither the state board of education, nor any public elementary or secondary school governing authority, director of schools, school system administrator, or any public elementary or secondary school principal or administrator shall prohibit any teacher in a public school system of this state from helping students understand, analyze, critique, and review in an objective manner the scientific strengths and scientific weaknesses of existing scientific theories covered in the course being taught."


Look familar? It should.

The bill was opposed by a broad-based coalition, including the National Association of Biology Teachers, the American Association for the Advancement of Science, the American Civil Liberties Union of Tennessee, the American Institute for Biological Sciences, the Knoxville News Sentinel, the Nashville Tennessean, the National Association of Geoscience Teachers, the National Earth Science Teachers Association, the Tennessee Science Teachers Association, and all eight Tennessee members of the National Academy of Sciences.

These voices of reason were no opposition to ALEC, its corporate backers, and the politicians who serve them, which saw the bill pass with little opposition whatsoever."
(From http://truth-out.org/news/item/8136-alec-climate-change-denial-model-bill-passes-in-tennessee )

Tuesday, March 6, 2012

Stormy weather


Waiver: these are NOT tropical storm clouds!

The South-West Indian Ocean Basin is apparently one of the most dangerous tropical storm regions in the world, with an average of 80 deaths a year. Apparently Hurricane Irina, which just caused havoc along the KwaZulu-Natal coast, brings the death toll for this year so far to 164 - and there are still at least two months of the season to go.
is this fall-out from warmer seas due to climate change, one wonders?

Sunday, February 19, 2012

Summer temperatures and food security


Summer temperatures will rise (or rise and fall) to a point where you can't grow certain crops. And the losers are? Wait, I have the envelope right here: "the biggest impacts will be on Europe, Africa and South America.

Models underestimate future temperature variability; Food security at risk

Climate warming caused by greenhouse gases is very likely to increase the variability of summertime temperatures around the world by the end of this century, a University of Washington climate scientist said Friday. The findings have major implications for food production.

Current climate models do not adequately reflect feedbacks from the relationship between the atmosphere and soil, which causes them to underestimate the increase of variability in summertime temperatures, said David Battisti, a UW professor of atmospheric sciences.

While warmer temperatures already have implications for food production in the tropics, the new findings suggest the increase in the volatility of summertime temperatures will have serious effects in grain-growing regions of Europe and North and South America, Battisti said.

"If there's greater variability, the odds of the temperature being so high that you can't grow a crop are greater," he said.

"In terms of regional and global food security, it's not good news."

[...]

Earlier research has shown that by the end of this century, the increase in average growing season temperature, if other factors remain the same, will likely reduce yields of rice, corn and soybean 30 to 40 percent. Already rice yields in the tropics are being affected by higher temperatures, affecting nations such as Indonesia, which frequently imports rice to stabilize prices, Battisti said.

In addition, the scientists say global warming will have greater impacts than previously thought on the El Niño Southern Oscillation, a tropical phenomenon that has global impact on climate and food production. Their conclusions are based on geological and other proxy records of climate and El Niño from the last 10,000 years, plus recent analyses of long-term climate changes because of global warming.

The Intergovernmental Panel on Climate Change, the United Nations body conducting ongoing assessments of climate change, has estimated that future month-to-month temperature variability during summer months is likely to be greater in some places and less in some places, but should stay roughly constant in many places.

But the new modeling work, Battisti said, shows most areas can expect to see greater variability in summer temperatures between now and 2085, with the biggest impacts in Europe, Africa and South America.

"The increased variability will be pretty ubiquitous. You will see it pretty much everywhere."

Increased temperature variability compounds the loss of production because of higher average temperatures, Battisti said. Add higher fertilizer prices and other market pressures to the mix "and food insecurity is likely to be higher than it has been for some time."
(EurekAlert 17 Feb 2012)

Friday, February 10, 2012

Stormy weather

Did you know that the South-West Indian Ocean cyclone basin is one of the deadliest in the world, with about 80 people dying a year? The season begins in mid-November and ends around end April - although it can linger for a month more around Mauritius and Reunion. Apparently it averages about 10 storms a year. There's a new one brewing, and NASA caught footage of it. It's expectd to make landfall in Madagascar on 13 Feburary. I wonder if this cyclone basin is becoming more active? http://www.eurekalert.org/multimedia/pub/40637.php?from=204616