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Global greening/CO2 Fertilization

Global greening/CO2 Fertilization

Unread postby pstarr » Sat 12 Aug 2017, 19:15:25

Here is the latest study on the phenomena, published 24 July 2017: NatureCommunications Recent increases in terrestrial carbon uptake at little cost to the water cycle

I am recently and profoundly interested in this subject, having been a environmental pessimist my entire life. As recently as the Great California Drought and before that during the 2005 Hurricane season I assumed it was a race between GW and PO. This has been difficult transition, but I am now prepared to discuss the issue with a most jaunty attitude :).

Anyone interested? Or is good-natured discussion on this touchy subject impossible here at PO.com? The summary and discussion in phys.org by (one of) the paper's author (in phys org);
Land plants are absorbing 17% more carbon dioxide from the atmosphere now than 30 years ago, our research published today shows. Equally extraordinarily, our study also shows that the vegetation is hardly using any extra water to do it, suggesting that global change is causing the world's plants to grow in a more water-efficient way.

Water is the most precious resource needed for plants to grow, and our research suggests that vegetation is becoming much better at using it in a world in which CO₂ levels continue to rise.
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Re: Global greening/CO2 Fertilization

Unread postby jawagord » Sun 13 Aug 2017, 10:45:11

As early Greenpeacer turned sensible environmentalist Dr. Patrick Moore suggests we should be celebrating CO2 and increasing levels will be a boon for the biosphere.

"CO2 is the currency of life and the most important building block for all life on Earth. All life is carbon-based, including our own. Surely the carbon cycle and its central role in the creation of life should be taught to our children rather than the demonization of CO2, that “carbon” is a “pollutant” that threatens the continuation of life. We know for a fact that CO2 is essential for life and that it must be at a certain level in the atmosphere for the survival of plants, which are the primary food for all the other species alive today. Should we not encourage our citizens, students, teachers, politicians, scientists, and other leaders to celebrate CO2 as the giver of life that it is?"

https://www.thegwpf.org/patrick-moore-s ... n-dioxide/

You can buy CO2 grow room kits and show yourself higher CO2 levels are good for plants.

"While normal outdoor CO2 levels (about 400ppm) will achieve normal plant growth, doubling or tripling the CO2 levels can increase the growth rate. However, above 2,000ppm CO2 becomes toxic to plants, and above 5,000ppm CO2 becomes potentially harmful to people. Most experts agree that 1,500 ppm is the maximum CO2 level for maximum plant growth, although any CO2 level between 1,000ppm and 1,500ppm will produce greatly improved results."
https://www.co2meter.com/blogs/news/410 ... greenhouse
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Re: Global greening/CO2 Fertilization

Unread postby Shaved Monkey » Sun 13 Aug 2017, 17:52:42

Bleached coral jewellery would be a good by product to sell on etsy

.......................
From the CSIRO report

For dry Australia, however, more than half (64%) of the rainfall returning to the atmosphere does not go through vegetation, but through direct soil evaporation.
This reduces the potential benefit from increased vegetation water use efficiency and the possibility for more water flowing to rivers and reservoirs.
In fact, a recent study shows that while semi-arid regions in Australia are greening, they are also consuming more water, causing river flows to fall by 24-28%.

Our research confirms that plants all over the world are likely to benefit from these increased water savings. However, the question of whether this will translate to more water availability for conservation or for human consumption is much less clear, and will probably vary widely from region to region.
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Re: Global greening/CO2 Fertilization

Unread postby pstarr » Sun 13 Aug 2017, 18:45:11

Shaved Monkey wrote:Bleached coral jewellery would be a good by product to sell on etsy

.......................
From the CSIRO report

For dry Australia, however, more than half (64%) of the rainfall returning to the atmosphere does not go through vegetation, but through direct soil evaporation.
This reduces the potential benefit from increased vegetation water use efficiency and the possibility for more water flowing to rivers and reservoirs.

Irrelevant to the study conclusion. The net effect of increased water retention within the vegetated 36% is a gross positive, while dry-land soil evaporation remains the same.

I
Shaved Monkey wrote:n fact, a recent study shows that while semi-arid regions in Australia are greening, they are also consuming more water, causing river flows to fall by 24-28%.
This contradicts the known science. The additional greening in arid semi-arid regions (above baseline greening seen in wet regions) is specifically a consequence of increased water retention (as well as CO2 nutrient fertilization). The plants expire less (in a CO2 rich atmosphere) during the day when photosynthesis occurs, ie they receive their fill of CO2 quicker and breath less. The stomata is open less, loosing less water.

Shaved Monkey wrote:Our research confirms that plants all over the world are likely to benefit from these increased water savings. However, the question of whether this will translate to more water availability for conservation or for human consumption is much less clear, and will probably vary widely from region to region.

People rarely die due to lack of water. But they do starve. CO2 fertilization increases all vegetation growth, including crops
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Re: Global greening/CO2 Fertilization

Unread postby Shaved Monkey » Sun 13 Aug 2017, 21:33:43

Saw yesterday on a TV show in Australia a CSIRO scientist give a rough figure for water per calorie, I think it was 1 litre per calorie ????

http://www.abc.net.au/gardening/video/d ... Laboratory

another CSIRO experiment
Carbon emissions are not soaked up by trees as well as initially thought, say scientists
In a world-first experiment, experts exposed a plantation of eucalypts to the same level of carbon expected to be in the atmosphere in 35 years' time.
Professor David Ellsworth, who led the study, said while the trees captured the carbon well up to the present day, they could not capture more.

"We saw no growth response to the trees, to the elevated CO2, and we saw no productivity response either," he said.

"That means that the trees are actually soaking up more CO2, but potentially also just spitting it back out, so to speak, and not storing it.



http://www.abc.net.au/news/2017-03-07/f ... re/8330620
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Re: Global greening/CO2 Fertilization

Unread postby pstarr » Sun 13 Aug 2017, 22:34:44

It's not a world-first experiment. There have been numerous CO2 enrichment experiments over the years, most showing increased plant growth both in controlled greenhouse environment and also outdoors in the forest or field . . . as per this free-air test: Free Air CO2 Enrichment Experiment in Northern Japan
We are now obtaining interesting
results from our two-year FACE
experiment. Under elevated CO2
concentrations, the leaf stomata
(the microscopic pores under
the leaves, which open outside
to give out oxygen and water vapor
and take in CO2) tended to
close and the transpiration rate
decreased in almost all tree species
grown on both volcanic ash
soil and brown forest soil. However,
the photosynthetic rate of
most species tended to increase.
Consequently, the water use efficiency
of leaves increased significantly.


The mechanism by which CO2 acts as a growth stimulant is clear cut, as is the water-retention benefits. Most controlled enhancement studies (outdoor as well as greenhouse) tend to support large-scale outdoor observational studies (such as the recent global satellite report): that vegetation has increased world-wide in direct response to elevated CO2. This of course traps CO2 in cellulose, and is perhaps responsible for the recent plateau in growth in global CO2 emissions.
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Re: Global greening/CO2 Fertilization

Unread postby dohboi » Sun 13 Aug 2017, 23:49:40

thanks for those excellent posts and links, SM. I'm sure some will have trouble understanding and appreciating them... :roll:
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Re: Global greening/CO2 Fertilization

Unread postby dohboi » Mon 14 Aug 2017, 11:24:55

Some further perspectives on the general issue here: https://robertscribbler.com/2017/08/14/ ... ent-121289

Plants Belched 3 Billion Tons of Carbon into Atmosphere During Monster El Nino of 2014-2016
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Re: Global greening/CO2 Fertilization

Unread postby pstarr » Mon 14 Aug 2017, 11:30:43

dohboi wrote:Some further perspectives on the general issue here: https://robertscribbler.com/2017/08/14/ ... ent-121289

Plants Belched 3 Billion Tons of Carbon into Atmosphere During Monster El Nino of 2014-2016

Tropical forest fires are a consequence of human slash and burning, not normal ecological cycles. The report conclusion is simply idiotic, like like saying that humans belch O2. It's just plain stupid.
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Re: Global greening/CO2 Fertilization

Unread postby pstarr » Mon 14 Aug 2017, 11:57:04

Did you know that the Earth is getting greener, quite literally? Satellites are now confirming that the amount of green vegetation on the planet has been increasing for three decades.

This possibility was first suspected in 1985 by Charles Keeling, the scientist whose meticulous record of the content of the air atop Mauna Loa in Hawaii first alerted the world to the increasing concentration of carbon dioxide in the atmosphere. Mr. Keeling's famous curve showed not only a year-by-year increase in carbon dioxide levels but a season-by-season oscillation in the concentration.

During summers in the Northern Hemisphere, the Earth breathes in carbon dioxide as green plants (most of which are north of the equator) absorb the gas and turn it into carbohydrate. In the northern winter, the Earth breathes the gas out again, as the summer's leaves rot.

Mr. Keeling and colleagues noticed that the depth of the breathing had increased in Hawaii by 20% [by 1995] since the 1960s: The Earth was taking in more carbon dioxide each northern summer and giving out more each winter. Since the inhalation is done by green leaves, they reasoned, the amount of greenery on the planet must be growing larger. In the 1980s forest biologists started to report striking increases in the growth rates of trees and the density of forests: in Douglas firs in British Columbia, Scots pines in Finland, bristlecone pines in Colorado and even tropical rain forests.


So the man responsible for the alarmist craziness also described the mechanism by which Gaia self-moderates. Keeling was in balance with his Goddess, something the climate reductionists have not yet figured out.
There's nothing deeper than love. In fairy tales, the princesses kiss the frogs, and the frogs become princes. In real life,the princesses kiss princes, and the princes turn into frogs

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Re: Global greening/CO2 Fertilization

Unread postby pstarr » Tue 15 Aug 2017, 12:46:46

Chemical evidence in ice cores shows that global greening/CO2 fertilization has increased along with industrialization. For several hundred years. CO2 is good for plants.

New York Times, April 5, 2017: Antarctic Ice Reveals Earth’s Accelerating Plant Growth
Analyzing the ice, Dr. Campbell and his colleagues have discovered that in the last century, plants have been growing at a rate far faster than at any other time in the last 54,000 years. Writing in the journal Nature, they report that plants are converting 31 percent more carbon dioxide into organic matter than they were before the Industrial Revolution.

Old trapped atmospheric carbonyl sulfide is a measure of historical plant growth

"“The pace of change in photosynthesis is unprecedented in the 54,000-year record,” Dr. Campbell said. While photosynthesis increased at the end of the ice age, he said, the current rate is 136 times as fast."
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