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Jennifer Marohasy

Jennifer Marohasy

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Archives for October 2006

Killer Greenhouse Effect (or Pardon my Anoxia): A Note from Luke

October 4, 2006 By Luke Walker

Luke Walker reminds us that geological history includes evidence of mass extinctions from “killer greenhouse conditions”:

“Readers of this blog are often witness to accusations of alarmism by those opposed to scenario projections using contemporary anthropogenic global warming theory.

Comfort is often taken in the world having survived substantial climate swings in geological time and that some species such as reef building corals have come through that turmoil.

So it is with some irony that the October 2006 issue of Scientific American has a major article by Professor Peter Ward at the University of Washington suggests that extinction events in geological history have been caused by killer greenhouse conditions. What’s this – geological alarmism? Is nothing sacred?

“More than half life on the earth has been wiped out, repeatedly, in mass extinctions over the past 500 million years. One such disaster, which includes disappearance of the dinosaurs, is widely attributed to an asteroid impact, but others remain inadequately explained.

New fossil and geochemical evidence points to a shocking environmental mechanism for the largest of the ancient mass extinctions and possibly several more: an oxygen depleted ocean spewing poisonous gas as a result of global warming”

Apparently five times over the last 500 million years most of the world’s life forms have ceased to exist. End of the Ordovician 443 My ago; close of the Devonian 374 My; the Great Dying at the end of the Permian 251 My where 90% of ocean dwellers and 70% of land dwellers were obliterated; the end of the Triassic 201 My; and the end of the Cretaceous at 65 My with a likely asteroid impact.

However, new analyses are showing that some sudden extinctions were not that sudden lasting several hundred thousands of years.

It theoretically works something like this:

1. Volcanic activity releases carbon dioxide and methane

2. Rapid global warming occurs

3. Warm ocean absorbs less oxygen

4. Anoxia destabilises the chemocline where oxygenated surface waters meet H2S permeated waters in the ocean, anaerobic bacteria flourish

5. Hydrogen sulphide gas (H2S) gas upwells through the ocean as the chemocline rises to the ocean surface

6. Green and purple sulphur bacteria in the surface ocean thrive while oxygen breathers suffocate

7. H2S gas kills land animals and plants.

8. H2S destroys the ozone shield

9. Ultra violet radiation from the sun kills remaining life.

“A minor extinction at the end of the Palaeocene 54My ago was already – presciently – attributed to an interval of oceanic anoxia somehow triggered by short-term global warming.” Evidence is also present at the end of Triassic, middle Cretaceous, and late Devonian.

So are these extreme greenhouse effect extinctions possibly a recurring phenomenon in the earth’s history. Atmospheric CO2 was 1000ppm when extinctions began in the Palaeocene. “

So if the modern earth got close to 1000ppm this might represent something for our children to deal with. But maybe that’s just geological alarmism for you.

I’m getting a Lotto syndicate going called “Killer Greenhouse”.

More reading:

Climate simulation of the latest Permian: Implications for mass extinction by Jeffrey T. Kiehl & Christine A. Shields Climate Change Research Section, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, Colorado 80305, USA

Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa
Science 4 February 2005:Vol. 307. no. 5710, pp. 709 – 714 by Peter D. Ward,1* Jennifer Botha,3 Roger Buick,2 Michiel O. De Kock,5 Douglas H. Erwin,6 Geoffrey H. Garrison,2 Joseph L. Kirschvink,4 Roger Smith3

Photic Zone Euxinia During the Permian-Triassic Superanoxic Event, Science 4 February 2005:
Vol. 307. no. 5710, pp. 706 – 709 by Kliti Grice, Changqun Cao, Gordon D. Love, Michael E. Böttcher, Richard J. Twitchett, Emmanuelle Grosjean, Roger E. Summons, Steven C. Turgeon, William Dunning,Yugan Jin

Massive Release of Hydrogen Sulphide to the Surface Ocean and Atmosphere during intervals of Oceanic Anoxia. Kump, L.R., Pavlov, A., Arthur, M.A. Geology: 33:5:397-400. May 2005.”

————————
Thanks Luke. And I’m going to add to your reading list: The Past is the Key to the Present: Greenhouse and Icehouse Over Time by Prof Ian Plimer, IPA Review, Vol 55, No. 1. March 2003, pgs. 9-12.

Filed Under: Uncategorized Tagged With: Climate & Climate Change

What will Australian Farmers Be Growing in 10 Years Time?

October 4, 2006 By jennifer

What will Australian farmers be growing in 5- 10 years time?

I watched Part 3 of Two Men in a Tinnie * on ABC TV last night. It’s about environmentalist Tim Flannery and TV personality John Doyle motoring down the Darling and Murray Rivers in a small aluminum boat.

They have met lots of people along the river but haven’t yet interviewed a rice or cotton farmer while often complaining about these crops. In Parts 1 and 2 they reminisced about the days when farmers grew sheep rather than cotton.

A couple of years ago I wrote that:

“It is [Peter] Cullen’s contention that we can save water in the Murray–Darling Basin by growing higher value crops, in particular wine grapes. And there are those who insist that rice growing should be banned altogether. While concerned greens may be keen to sip champagne for breakfast, rather than crunch rice bubbles—all in the name of doing the right thing by the environment— is this really a sustainable approach?”

I went on to explain in that article that…

“One of the most defining characteristics of water in the Australian landscape is flow variability. In the poem ‘My Country’, Dorothea McKellar appropriately describes Australia as a land ‘of drought and flooding rains’. Reflecting this variability, water allocation can be severely restricted in drought years like the present, even though water storage capacity in the Murray Darling Basin is approximately 25 per cent of annual average runoff.

Paradoxically, rice growers easily cope with this by simply not planting a crop. In contrast, South Australian wine grape growers bleat loudly because their perennial crop needs water every year.”

Just yesterday I read Rabobank bank boss, Bert Heemskerk, stating that northern hemisphere farm subsidies ‘have to go’ and that this would lead to lead to an inevitable shift in global agricultural production from the northern hemisphere to the south.

The Pharmland website also suggests that Europe, in particular that Denmark, should lessen its dependence on massive EU agricultural subsidies and fostered a freer global market, allowing Third World countries to enter the market and begin self-sustaining economies. The site goes on to suggest that Denmark farmers begin to cultivate high value GM crops including vaccine-laden tomatoes.

At the opposite end of the spectrum is the potential increased production of low value GM crops for ethanol.

David Tribe wrote in the IPA Review last year that:

“Already, Brazilian fuel ethanol has become a substantial part of international trade, and currently competes commercially on US fuel markets, even with the penalty of a 51 per cent US excise tax. This dominant global trade position in ethanol liquid-fuel capitalises on 30 years of previous technological improvement, including earlier introduction of higher yielding cane varieties and numerous integrated changes to ethanol factories.

The recent wave of ethanol fuel ventures in Australia cannot afford to ignore the reality of markets dominated by very cheap Brazilian ethanol and the prospects of even lower priced Brazilian and US ethanol in the near future.

Cereal straw and sugar cane bagasse are not the only cellulosic starting materials which can be converted to sugar using enzyme catalysts: wood and many other non-food crops can also be used, and forest industries in Canada and Scandinavia have particular interests in this area.

…Ethanol biofuel doesn’t make economic or environmental sense without the tools and discoveries of modern biotechnology.

Without this, Australia would be better off importing its fuel ethanol from South America.

Setbacks to farm profitability and investment caused by GM crop bans show that technological leadership entails much more than just science and the costing of economic returns and agronomic benefits. They represent destruction of basic economic freedoms and threats to the medium term financial viability of several rural industries. Resolution of this damage might come from a frank assessment of the misjudgements of industry, farming groups, and politicians that caused them, as well as an action plan to change stakeholder strategies.

If it is indeed true that they were driven by political calculations about urban votes rather than government attention to the interests of the rural sector, stronger activism by farming organizations, such as the National Farmers Federation and other networks such as the recently established Producers Forum (which is a loose national network of concerned growers), are a very welcome sign.”

But not everyone is so optimistic. Last week I received an email from Aaron Edmonds with a link to a piece in The Daily Star that began:

“The Furnace Australia sailed into Chennai recently carrying a load of wheat and, some warned, ill tidings. India’s first wheat imports in six years marked a reversal in the march toward “food independence” that the country began in the 1970s.

In the piece Jason Overdorf goes on to suggest that Indian agriculture is in trouble, too reliant on technology and running out of water:

“Swaminathan urges leaders to focus on what he calls an ‘evergreen revolution’. The goal would be to correct the damage wrought by the first Green Revolution: adopting new methods like the use of natural predators instead of chemicals to eliminate pests, and switching to organic fertilizers and more efficient drip irrigation. He also says Singh should promote crops that require less water, including native Indian grains such as finger millet (ragi), pearl millet (bajra) and sorghum (jowar).

That’s a tough sell for two reasons: these coarse grains, once a staple of regional Indian cuisines, have fallen out of style since the first Green Revolution made wheat cheap and plentiful. So restoring their popularity will take a major marketing push, of the kind governments rarely do well. Second, Singh sees India very differently from the critics, as a nation fighting to attain middle-class comfort, not one at risk of sliding into mass hunger. Watch the future voyages of the Furnace Australia, and whether it is carrying grain to India, for one strong sign of which view is right.

But i’ts hard for me to reconcile the claim that Indian agriculture is in trouble with reports that cotton yields are up?

Indeed world cotton production is projected at 25 million tons in 2006/07 with China (Mainland), India and Pakistan combined expected to produce 13 million tons in 2006/07, or over half of world production for the first time in history.

Again, according to David Tribe in that piece from last year’s IPA Review:

“Modern plant breeding is playing decisive role in this economically disruptive but beneficial-to-the consumer transition. The continuing global progress with this revolution, which started in Australia and the US in 1996, is illustrated by recent comments made by Zhang Rui, a member of a research team in the Chinese Academy of Agricultural Sciences. In September this year, he announced that China has approved commercialization of a new hybrid variety of insect-resistant Bt cotton—which contains a protein that kills bollworms—that should yield 26 per cent more cotton. The last two seasons have also witnessed truly dramatic improvements in the
Indian cotton industry productivity.

Widespread use of genetically modified cotton seeds has helped assure India of a bumper 2005 cotton harvest, with national output estimated at 25 million bales, up seven per cent from 2004.”

Back to that original question: What will Australian farmers be growing in 5- 10 years time?

Will the demand for ethanol (in Australia and overseas), lifting of the bans on GM food crops, lifting of agricultural subsidies in Europe, relative competitiveness of Asian farmers, or the availablility and price of water, be the most significant drivers of change?

———————————
* I’ve noted Luke’s request that I comment on this series. I’m working up to a long blog post pointing out the difference between the rhetoric and the imagery.

Filed Under: Uncategorized Tagged With: Food & Farming

Global Warming Bits & Pieces

October 3, 2006 By jennifer

I’ve received a few bits and pieces on global warming from readers of this blog:

Cathy sent me a link to an article explaining that the European Commission is set to roll out the first phase of a major pan-European marketing campaign to raise awareness of climate change:
http://www.revolutionmagazine.com/News/index.cfm?fuseaction=ViewNewsArticle&newsID=595977

Luke recommends http://www.theozonehole.com/climate.htm for everyone still wondering about the connection between ozone and global warming following the note from Helen Mahr, in particular:
“Ozone’s impact on climate consists primarily of changes in temperature. The more ozone in a given parcel of air, the more heat it retains. Ozone generates heat in the stratosphere, both by absorbing the sun’s ultraviolet radiation and by absorbing upwelling infrared radiation from the lower atmosphere (troposphere). Consequently, decreased ozone in the stratosphere results in lower temperatures. Observations show that over recent decades, the mid to upper stratosphere (from 30 to 50 km above the Earth’s surface) has cooled by 1° to 6° C (2° to 11° F). This stratospheric cooling has taken place at the same time that greenhouse gas amounts in the lower atmosphere (troposphere) have risen.”

Warwick Hughes wrote: I have been very impressed with the breaking work of E-G Beck drawing attention to many published refs to high CO2 levels since 1820 and notably in WWII years. I have a Blog post on that at:
http://www.warwickhughes.com/blog/?p=64#more-64
There is a 10 page summary pdf file there. It will be fascinating to see if further support can be found for Beck’s conclusions. Beck’s detailing of the depth and quality of work which found these early high CO2 numbers supports the conclusions of Dr Zbigniew Jaworowski in his ice core research where he draws attention to the suppression of inconvenient high readings to fit the IPCC line.

George McCallum has sent me a beautiful picture of sunset over mountains and glacier in Isfjorden, Spitzbergen, with the note that Spitsbergen or Svalbard as it is also known, recorded one of the warmest summers on record this year. Isfjorden is just 900km from the North pole.

gmc0709067016.jpg
For beautiful pictures visit www.whalephoto.com

Filed Under: Uncategorized Tagged With: Climate & Climate Change

Australian Environment Foundation Update

October 3, 2006 By jennifer

Australian Environment Foundation Chairman Don Burke will be attending the Great Aussie Breakfast at Federation Square in Melbourne on Wednesday October 4th as a guest of the Victorian Farmers Federation. The breakfast runs from 7 – 10am .

The first AEF Conference & AGM held over the weekend of 23rd and 24th September was a huge success. Most of the papers are now available online: http://www.aefweb.info/display/conference2006.html including the paper by forester Mark Poynter mentioned at a recent blog post.

Giving an environmental award to timber company Gunns Ltd has proven a bit controversial with the Wilderness Society objecting, see http://tasmaniantimes.com/index.php/weblog/comments/breathtaking-hypocrisy/

Planning has already started for the 2007 AEF conference to be held in Melbourne during spring.

—————————
I’m a Director of the AEF.

Filed Under: Uncategorized

How Are Plastic Bags a Symbol of Inefficiency?

October 3, 2006 By jennifer

Plastic bags are free, convenient, versatile, re-usable and through a voluntary program Australians apparently use nearly 50 percent less of them than we did three years ago.

But from 2009 you will need to pay for every plastic bag you take from a supermarket if you live in Victoria. Why? Because they are apparently a “as symbol of our inefficient use of resources”.

I’ve glean this information from an article in yesterday’s The Australian entitled Plastic Bagging by their new environment reporter Matthew Warren.

The article also mentions that even with generous definitions of environmental hazard for plastic bags, the cost of imposing various bans on their use is about four times greater than the environmental benefit.

So why is the Victorian government going to ban their free distribution from 2009 and how are plastic bags a symbol of inefficient resource use?

———————————-
I’ve previously blogged on biodegradable plastic bags: https://jennifermarohasy.com.dev.internet-thinking.com.au/blog/archives/000993.html .

Filed Under: Uncategorized

Pharming in Denmark: A Note from Roger Kalla

October 2, 2006 By jennifer

Jennifer,

During my trawls of the www I came across the following blog which purports to describe a future where Denmark has transformed its agriculture and land use in through large scale adaptation of molecular pharming .

The blog is at
http://pruned.blogspot.com/2006/09/pharmland.html
and if you scroll down to the bottom, you’ll see

“For more on this wondrously pragmatic utopia, view the presentation
slideshow” and the slideshow link,
http://www.nord-web.dk/pharmland_2.htm

Takes you to a new website where you can view a “documentary” movie
online presented by a fictitious Minister of Health and Agriculture at
http://www.nord-web.dk/pharmland_movie.htm

This future scenario is not that outlandish since Denmark has got a large biotech industry (Novo Nordisk is the major producer of recombinant insulin) and the Danish Government has recently adopted coexistence laws which will allow for growing GM and non-GM side by side.

Interesting view of a possible future for Denmark and possibly Tasmania which is growing pharmaceutical crops already (poppies) and are exempting poppies from its GM Crops ban.

Roger

Roger Kalla, PhD
Director Korn Technologies
www.korntechnologies.com

Filed Under: Uncategorized Tagged With: Biotechnology

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Jennifer Marohasy Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation. Read more

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