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"What is the norm for planet earth's CO2 concentration in the atmosphere to keep plant and animal life thriving
and flourish?"
Where would we have been if we didn't add CO2 'unconsciously' into the atmosphere?
By that i mean, isn't there a possibility we are actually helping nature (at least some species) to survive?
How many lives did we officially saved with the research, prevention or boldly the actions we undertake
against global warming? Are there any numbers available?
Does this outweigh the deaths caused by the lack of electricity?
We know now that almost every model on climate sensitivity and global warming prediction were wrong.
The actual data is far from the predictions, why aren't these scientists relieved it didn't went the way predicted?
"How many lives did we officially saved with the research, prevention or boldly the actions we undertake against global warming? Are there any numbers available?
Maybe someone a little more sciency can explain why CO2 is even an issue, I thought it was heavier than air, so it will sink to lowest point.
Not really a meaningful question (sort of like "how long is a piece of string") but we do know that CO2 levels are higher now than they have been since we've been human.
"What is the norm for planet earth's CO2 concentration in the atmosphere to keep plant and animal life thriving and flourish?"
45% No, not a small margin.
If most of the plants(85%, C3-plants) we use for consumption would die off if concentrations dropped below 150ppm, is it then responsible we aim for a concentration like we had before the Industrial Revolution, around 275ppm? That's a small margin, no?
Are you saying that moving to alternative sources would result in a lack of electricity? Sorry to answer a question with a question, but why?
"How many lives did we officially saved with the research, prevention or boldly the actions we undertake against global warming? Are there any numbers available?
Does this outweigh the deaths caused by the lack of electricity?" Money better spend elsewhere?
Far from predictions?
"We know now that almost every model on climate sensitivity and global warming prediction were wrong.
The actual data is far from the predictions, why aren't these scientists relieved it didn't went the way predicted?"
originally posted by: Phage
a reply to: 727Sky
Please list those failed "predictions" and by whom they were made. Lest you be engaging in gish galloping.
Don't be lazy, follow the example of the OP.
originally posted by: Phage
a reply to: 727Sky
Please list those failed "predictions" and by whom they were made. Lest you be engaging in gish galloping.
Don't be lazy, follow the example of the OP.
originally posted by: Phage
a reply to: 727Sky
I would be willing to bet I am older
1953
Got anything relevant?
Relevance?
I was hitting a golf ball over 300 yards when I was your age Page.
They, the pushers, were in a minority. Similar to the AGW skeptics now.
They, the pushers, were wrong then and there really is a possibility that the new pushers are wrong today..
Yeah. Well. I have offspring.
Either way you and I will probably both be dead before the Climate SHTF.
I can say that in contrast to what the like of the IPCC would rather you believe, is that there is not a blanket of CO2 around the globe this minute as if a constant, it's different region to region. Sure CO2 is everywhere, but any 'blanket' would be a bit thin in some areas than others.
CO2 produced from burning fossil fuels or burning forests has quite a different isotopic composition from CO2 in the atmosphere. This is because plants have a preference for the lighter isotopes (12C vs. 13C); thus they have lower 13C/12C ratios. Since fossil fuels are ultimately derived from ancient plants, plants and fossil fuels all have roughly the same 13C/12C ratio – about 2% lower than that of the atmosphere. As CO2 from these materials is released into, and mixes with, the atmosphere, the average 13C/12C ratio of the atmosphere decreases.
originally posted by: lostbook
a reply to: intergalactic fire
I read somewhere that there will be an increase in plant growth due to increasing C02 but that the plants will be less nutritious.
Protein concentrations in plant tissues are closely tied to plant nitrogen status. Changes in plant tissue nitrogen are therefore likely to have important effects on species at higher trophic levels. Performance is typically diminished for insect herbivores feeding on plants grown in elevated CO2 (Zvereva & Kozlov 2006). This can lead to increased consumption of plant tissues as herbivores compensate for decreased food quality (Stiling and Cornelissen 2007). Effects on human nutrition are likely as well. In FACE experiments, protein concentrations in grains of wheat, rice and barley, and in potato tubers, are decreased by 5–14% under elevated CO2 (Taub et al. 2008). Crop concentrations of nutritionally important minerals including calcium, magnesium and phosphorus may also be decreased under elevated CO2 (Loladze 2002; Taub & Wang 2008).
originally posted by: Mandroid7
Goog..."CO2 concentration in ambient air ranges from 300-500 parts per million (ppm), with a global atmospheric average of about 400 ppm. If you are growing in a greenhouse or indoors, the CO2 levels will be reduced as the plants use it up during photosynthesis."
1000-1500 ppm is used in grow rooms, for lush plants and up to a 50 percent decrease in total grow time.
I read somewhere that Ice cores have shown high co2 levels back when the earth was covered with lush vegetation before the ice age.
Plants eat it up during the light cycle, then release oxygen during the dark cycle.
Maybe someone a little more sciency can explain why co2 is even an issue, I thought it was heavier than air, so it will sink to lowest point.
Large greenhouse growers buy methane burners to add more CO2 into the greenhouse atmosphere, thereby increasing the yield. The manufacturers advertise on the web.
Please list those failed "predictions" and by whom they were made. Lest you be engaging in gish galloping.
Arctic sea ice volume starts the 2017 with a new record. January 2017 sea ice volume was 14,600 km3 , more than 1100 km3 below the previous record for January in 2013. This record is in part the result of anomalously high temperatures throughout the Arctic for November through January discussed here and here. January volume was 47% below the maximum January ice volume in 1979, 33% below the 1979-2016 mean, and about 1.5 standard deviations below the long term trend line.
Antarctica’s population of Adélie penguins (Pygoscelis adeliae), which numbers approximately 2.5 million breeding pairs, closely reflects underlying changes in the lower levels of the food web and the ice environment on which they are dependent. For example, their notable decrease on the Antarctic Peninsula is thought to be a direct response to a reduction in sea ice as a consequence of climate change. Across their distribution of ice free breeding sites along the Antarctic coastline and offshore islands, their population trends vary, with some populations decreasing, some remaining stable and others increasing.
The population increase in East Antarctica contrasts strongly with research showing widespread decreases in Adélie penguin populations on the West Antarctic Peninsula over the same time. “With Adélie penguins there is a delicate balance between too much and too little sea-ice for accessing foraging grounds, capturing prey and resting,” Dr Emmerson said. “It has been proposed that in areas where ice is very extensive, such as East Antarctica, a reduction in sea ice extent will initially benefit the species up to a point, and then further reductions will be detrimental – as we are seeing in West Antarctica.” The increasing Adélie population in East Antarctica also contrasts with declines in East Antarctic emperor penguin populations. “Differing species’ ecologies can result in a range of responses to the same environmental conditions,” Dr Southwell said.
Editor’s note: Antarctica and the Arctic are two very different environments: the former is a continent surrounded by ocean, the latter is ocean enclosed by land. As a result, sea ice behaves very differently in the two regions. While the Antarctic sea ice yearly wintertime maximum extent hit record highs from 2012 to 2014 before returning to average levels in 2015, both the Arctic wintertime maximum and its summer minimum extent have been in a sharp decline for the past decades. Studies show that globally, the decreases in Arctic sea ice far exceed the increases in Antarctic sea ice.