What is the optimum level of CO2 in the atmosphere? What is the correct temperature of the Earth? I am sure AZJim can answer that question.
What is the optimum level of CO2 in the atmosphere? What is the correct temperature of the Earth? I am sure AZJim can answer that question.
waltky (10-31-2017)
Greenhouse gasses – mainly CO2, but also methane – were involved in most of the climate changes in Earth’s past. When they were reduced, the global climate became colder. When they were increased, the global climate became warmer. When CO2 levels jumped rapidly, the global warming that resulted was highly disruptive and sometimes caused mass extinctions. Humans today are emitting prodigious quantities of CO2, at a rate faster than even the most destructive climate changes in earth's past.
Abrupt vs slow change.
Life flourished in the Eocene, the Cretaceous and other times of high CO2 in the atmosphere because the greenhouse gasses were in balance with the carbon in the oceans and the weathering of rocks. Life, ocean chemistry, and atmospheric gasses had millions of years to adjust to those levels.
https://www.skepticalscience.com/cli...arm-period.htm
"Treat the earth well: it was not given to you by your parents, it was loaned to you by your children. We do not inherit the Earth from our Ancestors, we borrow it from our Children."
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Nattering naybob
waltky (10-31-2017)
Your typical alarmist would claim CO2 drives temps, that is, as CO2 rises so to do temps. But the recent 15, 16+ year virtual hiatus in temp rises all the while CO2 rates were rising at alarming rates falsifies that bunk. It's much more complex that that oversimplification. As climatology Judith Curry says, it's a wicked problem. But alarmist, and deniers, oversimplify, and in so doing leave out the science.
Links? Anyone familiar with the climate debate over the last 20 years knows these things.
waltky (10-31-2017)
At least I don't have to purchase CO2 injection for my outside plants!
waltky (10-31-2017)
Like to hear more about that greenhouse.
waltky (10-31-2017)
Granny says, "Dat's right - purt soon won't be no air to breathe den we all gonna die...
WMO: Greenhouse Gas Emissions Highest in 800,000 Years
October 30, 2017 — The World Meteorological Organization (WMO) reports greenhouse gas emissions in Earth's atmosphere have reached the highest level ever in 800,000 years. The figure was made public at the launch in Geneva of the WMO’s annual Greenhouse Gas Bulletin.
See also:The report was released in advance of next week’s U.N. climate change negotiations in Bonn, Germany. It is meant as a wake-up call to nations that time is running out to take the necessary actions to curb global warning. The WMO reports CO2 concentrations in the atmosphere surged at record-breaking speed last year to historic highs. The WMO says CO2 levels are now 145 percent higher than pre-industrial levels. It warns this has the potential to change the climate systems in unprecedented and disastrous ways. WMO Secretary-General Petteri Taalas says this is already occurring. He told VOA scientists have been able to track the variability of carbon dioxide concentrations thousands of years back.
A coal-fired plant is seen emitting carbon dioxide, in Juliette, Georgia
“We have far exceeded this natural variability that took place in the past and we are giving extra energy for our planet. We have already started seeing a growing amount of natural disasters related to weather. And, for example, the economic losses related to these disasters, they have tripled since the 80s. So, that is a consequence of climate change,” Taalas said. The report finds CO2 contributes more than 60 percent to the heating of the planet and that human activity and natural climate variability are behind the substantial increase in greenhouse gas concentrations.
Taalas warned temperature increases will reach dangerous levels by the end of the century without rapid cuts in CO2 and other greenhouse gas emissions. He said measures to mitigate climate change must be urgently taken. Taalas said work on developing renewable energy systems and transportation systems, including electric and hybrid cars, must be accelerated. He added these low carbon technologies can play an important role in reducing greenhouse gas emissions and lowering the Earth’s heat for future generations.
https://www.voanews.com/a/wmo-says-g...l/4092201.html
UN Environment Report Urges Revived Effort to Cut Emissions
October 31, 2017 — The U.N.'s environment program said Tuesday countries and industries need to do more to meet targets to trim emissions of greenhouse gases that experts say are contributing to global warming.
In its latest "Emissions Gap" report issued ahead of an important climate conference in Germany next week, the program takes aim at coal-fired electricity plants being built in developing economies and says investment in renewable energies will pay for itself — and even make money – over the long term. Tuesday's report comes as U.N. officials are making a renewed push to maintain momentum generated by the Paris climate accord of 2015.
It aims to cap global temperature increases to 2 degrees Celsius (Fahrenheit) by the year 2100 compared to average world temperatures at the start of the industrial era. "The Paris agreement boosted climate action, but momentum is clearly faltering," said Edgar Gutierrez-Espeleta, Costa Rica's environment minister who heads the 2017 UN Environment Assembly. "We face a stark choice: up our ambition, or suffer the consequences." A new round of U.N. climate talks known as COP 23 starts in Bonn, Germany, on Monday, when countries will take stock of their achievements and prepare more ambitious national goals.
Cattle graze in a pasture against a backdrop of wind turbines near Vesper, Kan.
In a summary of the report, UNEP says that current trends suggest that even if current national commitments are met, a temperature increase of 3-degrees Celsius by the end of the century is "very likely — meaning that governments need to deliver much stronger pledges when they are revised in 2020.'' "Should the United States follow through with its stated intention to leave the Paris agreement in 2020, the picture could become even bleaker," the statement said, alluding to the Trump administration plans to withdraw the U.S. from the global climate pact.
On the upside, the agency highlights "rapidly expanding mitigation action" and says carbon-dioxide emissions have remained stable since 2014, thanks partly to renewable-energy use in China and India. It cautioned that other greenhouse gases like methane continue to rise, however. UNEP trumpets the positive effects of investment in solar and wind energy and efficient appliances and cars, and efforts to preserve forests.
https://www.voanews.com/a/un-environ...s/4093559.html
Last edited by waltky; 10-31-2017 at 09:33 AM.
"Greenhouse Gas Emissions Highest in 800,000 Years" and yet we're still experiencing a virtual hiatus in temperature rise.
Tradition is not the worship of ashes, but the preservation of fire. ― Gustav Mahler