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Post by nyx on Sept 16, 2019 21:13:09 GMT
Is this a man made thing or the earth doing its thing?
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Post by swamprat on Sept 17, 2019 1:46:31 GMT
Probably some of both.
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Post by Deleted on Sept 17, 2019 15:04:25 GMT
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Post by swamprat on Sept 17, 2019 15:22:49 GMT
With all the fires in the Amazon, I'd like to see those same maps for South America!
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Post by thelmadonna on Sept 17, 2019 18:17:27 GMT
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Post by swamprat on Sept 26, 2019 2:34:31 GMT
Human Disruption of Earth's Oceans and Ice is 'Unprecedented,' Says 'Chilling and Compelling' Climate Report By Mindy Weisberger - Senior Writer 8 hours ago Planet Earth
Unless climate action is swift and dramatic, future upheaval will be catastrophic.
Ice melts on an iceberg on the coast of Greenland. (Image: © Greenpeace/Nick Cobbing)
Marine life overheats as it gasps for oxygen in warming oceans. Rising seas swallow islands and coastal areas. A growing number of storms generate historic flooding. Landslides and avalanches wreak havoc as stabilizing ice melts away.
These are just a few of the impacts that scientists are already documenting across the planet after decades of human-driven climate disruption. And there's far worse to come if climate-damaging activities continue unchecked, according to a report released today (Sept. 25) by the Intergovernmental Panel on Climate Change (IPCC), the United Nations body tasked with evaluating climate change (also referred to as global warming) documented by the latest research.
Only swift and decisive governmental actions to dramatically reduce greenhouse gas emissions due to fossil fuel burning on a global scale will reduce the harm of this runaway climate catastrophe, according to the report, which is a compilation of data from nearly 7,000 studies and represents the work of 104 researchers from 36 nations.
The Special Report on the Ocean and Cryosphere in a Changing Climate (SROCC) presents the latest evidence of climate change that is already underway and is an urgent wake-up call "telling us that we're on thin ice and running out of time to act," said Bruce Stein, chief scientist for the National Wildlife Federation (NWF).
"Climate-driven changes to our oceans are increasing flooding in coastal communities, disrupting economically important fisheries, and killing our dwindling coral reefs," Stein said in an NWF statement.
If fossil fuel use isn't reduced and global warming continues on the present trajectory, the consequences for both wildlife and humans could be catastrophic, according to the IPCC.
"Nearly 50% of coastal wetlands have been lost over the last 100 years, as a result of the combined effects of localised human pressures, sea level rise, warming and extreme climate events," the IPCC wrote in the report. By 2100, seas could rise by more than 3 feet (1 meter), displacing millions of people; approximately 680 million people live in coastal areas worldwide. And as sea levels continue to rise, once-in-a-century floods could take place at least once a year by 2050.
By 2050, marine heat waves will be 50 times more frequent than they were at the dawn of the 20th century, and the uppermost ocean zones could lose more than 3% of their oxygen, decimating populations of sensitive marine animals and harming fisheries, according to the report. Glaciers could be reduced by as much as 36%, while snow cover will drop by around 25% by 2100, affecting about 4 million people who live in the Arctic and around 670 million people who inhabit mountainous regions.
The widespread loss of ice and snow could lead to water shortages, affect food security, intensify droughts and contribute to the spread of wildfires, the IPCC said.
Though ice- and snow-covered locations like Antarctica, the Arctic and high mountain ranges may seem remote to many people, "we depend on them and are influenced by them directly and indirectly in many ways — for weather and climate, for food and water, for energy, trade, transport, recreation and tourism, for health and wellbeing, for culture and identity," IPCC Chair Hoesung Lee said in a statement.
Emerging evidence also suggests that in recent decades, warming oceans have fueled an increase in tropical hurricanes ranked Category 4 and higher, according to the report. What's more, projections show that thawing permafrost will release an estimated 1,460 to 1,600 gigatons of greenhouse gases — about as much as is currently held in Earth's atmosphere — by the end of the century and beyond, which will further accelerate climate disruption.
"Chilling and compelling"
Earth's fate hangs in the balance; warming has already climbed to 1.8 degrees Fahrenheit (1 degree Celsius) above preindustrial levels. But limiting global warming to the previously proposed target of 2.7 F (1.5 C) will forestall the worst-case scenarios proposed in the report.
"We will only be able to keep global warming to well below 2 degrees C above pre-industrial levels if we effect unprecedented transitions in all aspects of society, including energy, land and ecosystems, urban and infrastructure as well as industry," Debra Roberts, co-chair of the IPCC Working Group II, said in a statement.
"The more decisively and the earlier we act, the more able we will be to address unavoidable changes, manage risks, improve our lives and achieve sustainability for ecosystems and people around the world — today and in the future," Roberts said.
However, even under that limited warming, scientists warn that hotter oceans overall are "virtually certain," and they predict the loss of approximately 90% of coral reefs in warm waters worldwide, according to the report.
"The science is both chilling and compelling," Taehyun Park, a global climate political adviser with Greenpeace East Asia, said in a statement.
"The impacts of human-made carbon emissions on our oceans are on a much larger scale and happening way faster than predicted," Park said. "It will require unprecedented political action to prevent the most severe consequences to our planet."
www.livescience.com/ipcc-special-climate-report-oceans-ice.html
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Post by moksha on Sept 26, 2019 10:59:48 GMT
NO NEED
TO WORRY GATES WITH
THE BILL
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Post by Deleted on Sept 26, 2019 17:29:15 GMT
I've been following "Suspicious Observers" for years. Interesting stuff. CLIMATE FORCING
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Post by nyx on Sept 30, 2019 20:23:34 GMT
September in our area was the most hot and the most dry on records.
Now I know what happened to the dinosaurs, the dinosaurs cooked away in the sun.
Is our extinction on the horizon?
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Post by swamprat on Oct 2, 2019 15:20:55 GMT
Humans Are Disturbing Earth's Carbon Cycle More Than the Dinosaur-Killing Asteroid Did By Brandon Specktor - Senior Writer | Oct. 1, 2019 | Planet Earth
The asteroid helped kill 75% of life on Earth. Can we stop the climate crisis from wreaking similar devastation?
A researcher samples gas emissions released by Lastarria volcano on the border of Chile and Argentina. New research suggests that humans emit about 80 times more CO2 a year than every volcano on Earth combined. (Image: © Yves Moussallam, Lamont Doherty Earth Observatory)
Since 1750, humans have disrupted Earth's carbon cycle more severely than have some of the most cataclysmic asteroid impacts in history — and, new research suggests, the long-term effects on our planet (see: out-of-control global warming, ocean acidification, mass extinction) could be much the same.
This striking finding comes from a suite of papers published today (Oct. 1) in the journal Elements, authored by several teams of researchers from the Deep Carbon Observatory (DCO) — a global collective of more than 1,000 scientists studying the movement of all Earth's carbon from the core of the planet to the edge of space.
In a special edition of the journal, DCO scientists take a close look at what they call "perturbations" to Earth's carbon cycle over the last 500 million years or so. In that period, the authors wrote, the movement of carbon through our planet has been relatively stable — carbon gas (in the form of carbon dioxide and carbon monoxide, among others) being pumped into the atmosphere by volcanoes and subterranean vents is more or less balanced with the carbon sinking into the planet's interior at tectonic plate boundaries. This balance results in breathable air and a hospitable climate on land and sea that enables our planet's rich biodiversity.
However, every now and then, a cataclysmic event (or "perturbation") throws this balance out of whack, flooding the sky with the greenhouse gas carbon dioxide (CO2), disrupting the planet's climate over hundreds of years and often resulting in widespread extinction. In the new papers, the researchers identify four such perturbations, including several gargantuan volcanic eruptions and the arrival of the famous dinosaur-killing asteroid that struck the planet about 66 million years ago. Studying these disruptive events, the authors argue, may be key to understanding the next great climate cataclysm that's unfolding right before our eyes, and by our own hands.
"Today, the flux of anthropogenically generated carbon, primarily from [the] burning of fossil fuels that formed over millions of years, is contributing to a major perturbation to the carbon cycle," the researchers wrote in their introduction to the issue.
Indeed, they continued, the total amount of CO2 being released into the atmosphere every year by fossil fuel burning outweighs the cumulative amount of CO2 released by every volcano on Earth, by at least 80 times.
A striking impact
The most vivid comparison the authors draw between our current climate crisis and the perturbations of the past involves Chicxulub — the 6.2-mile-wide (10 kilometers) asteroid that crashed into the Gulf of Mexico 66 million years ago, leading to the extinction of 75% of life on Earth, including all the non-avian dinosaurs.
As the asteroid plowed into Earth with billions of times the energy of an atomic bomb, shock waves from the blast triggered earthquakes, volcanic eruptions and wildfires, possibly ejecting as much as 1,400 gigatons (that's 1,400 billion tons) of carbon dioxide into the atmosphere, the researchers explained. The greenhouse effect that resulted from these sudden emissions, according to the researchers, may have warmed the planet and acidified the oceans for hundreds of years to come, contributing to the mass die-off of plants and animals known as the Cretaceous-Paleogene extinction.
Still, even the highest estimated Chicxulub-related CO2 emissions are less than the cumulative, ongoing emissions associated with man-made climate change. Those emissions, the researchers wrote, amount to about 2,000 gigatons of CO2 pumped into the sky since the year 1750. It almost goes without saying at this point that, due to a failure to take meaningful global climate action, man-made emissions are still increasing every year.
To be clear, these new studies do not argue that humans are somehow "worse" than a giant space rock that obliterated all life for hundreds of miles around in seconds flat. Rather, the DCO researchers are pointing out that the pace and scale at which humans are disturbing the planet's carbon balance are comparable to some of the most cataclysmic geologic events in history.
It's likely, the researchers wrote, that the results of this era of man-made meddling could look similar to the troubled centuries following Chicxulub and other ancient cataclysms. This era, the researchers concluded, "is likely to leave its legacy as a mass extinction from greenhouse-induced climate change on a biosphere already at a tipping point caused by habitat loss."
Are you perturbed yet? You should be.
www.livescience.com/anthropogenic-warming-like-dinosaur-killing-asteroid.html
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Post by ZETAR on Oct 2, 2019 16:47:07 GMT
How Much CO2 Does A Single Volcano Emit?www.forbes.com/sites/startswithabang/2017/06/06/how-much-co2-does-a-single-volcano-emit/#66548c455cbf Every volcanic eruption that occurs on planet Earth is full of pollutants. Not just ash and dust, mind you, but also carbon dioxide: one of the strongest greenhouse gases on our planet. In the largest cases, a single volcanic plume, lasting only hours, might add many millions of tons of carbon dioxide to the atmosphere. Could it be the case, then, that individual volcanoes add more carbon dioxide to our atmosphere than human activity does? For billions of years, geological processes like volcanic eruptions controlled the carbon concentration in the atmosphere, as volcanism is the major way that carbon rises from the mantle into the atmosphere. Most of the carbon stored in the mantle is in the form of carbonate (a salt of carbonic acid), but there are also huge stores of actual carbon dioxide sequestered deep within the mantle as a dissolved gas within the liquid rock. Recent research about carbon reserves discovered underneath the United States has led to a new estimate of the amount of carbon in the Earth's upper mantle: approximately 100 trillion tons. By contrast, there are only about 3.2 trillion tons of CO2 (containing about 870 billion tons of actual carbon) in the atmosphere today.
Yes, we've accurately measured and estimated the amount of carbon dioxide that humans have been adding to the atmosphere through our burning of fossil fuels, but it's vital to know what the natural rate of CO2 emission is to understand the impact humans are having. Humans emit around 29 billion tons of CO2 each year: a little less than 1% of present atmospheric CO2. We tend to think of erupting volcanoes with active, smoking plumes as the biggest source of carbon dioxide...Greenhouse gas emissions by the United StatesThe United States produced 5.14 billion metric tons of carbon-dioxide equivalent greenhouse gas (GHG) emissions in 2017, the lowest since the early 1990s,[1] but still the second largest in the world after greenhouse gas emissions by China and amongst the worst countries by greenhouse gas emissions per person.en.wikipedia.org/wiki/Greenhouse_gas_emissions_by_the_United_States SHALOM...Z
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Post by swamprat on Oct 3, 2019 18:01:56 GMT
Drought may hit half world’s wheat at once by Tim Radford | 03 Oct 2019
Simultaneous droughts on several continents could wreak havoc. Image: By USDA (public domain), via Wikimedia Commons
The planet’s daily bread could be at risk as the global thermometer creeps up and climates begin to change. New research has warned that almost two thirds of the world’s wheat-growing areas could face “severe, prolonged, and near-simultaneous droughts” by the century’s end.
Right now, 15% of the world’s wheat producing regions are at risk of severe water scarcity at the same time. Even if the 195 nations that agreed in Paris to stop global average temperatures from rising beyond 1.5°C by 2100 keep that promise, the chance of simultaneous water stress across continents would still double between 2030 and 2070.
But if nations fail to mitigate the climate change and extremes of heat and rainfall that would inevitably follow runaway global heating, then the chances of devastating failure of wheat harvests in both Europe and North America, or both Europe and Australia, or Russia, Ukraine and Kazakhstan, begin to soar.
Wheat provides one-fifth of all the calories for humankind. It is the world’s largest rain-fed crop and the global wheat trade matches the traffic in rice and in maize combined. Ten regions account for 54% of the planet’s wheat fields, and 57% of the world’s wheat.
Scientists from Europe, the US and China report in the journal Science Advances that they worked with computer simulations to model the future global weather for water scarcity with changes in temperature for the next eight decades.
Wheat is a successful crop partly because its water needs are relatively low, but it can’t flourish without reliable rainfall before and during growth. And the new simulations confirm earlier fears: that extremes of heat and devastating drought could happen in more than one continent at the same time.
When this happened in the 19th century, global famine followed. Forecasts already warn that with each 1°C rise in temperature, global wheat yield will fall by between 4% and 6.5%. Researchers have repeatedly warned that extremes of heat can slash yields and limit the vital nutrients in cereal harvests. Other teams have found that climate change may already be making this happen.
Worse could follow as one heat wave is pursued promptly by another. And all this could happen in a world in which, as population grows, demand for wheat could increase by at least 43%.
Continued checking
Scientists tend not to take the research of others for granted: they keep on checking. The latest simulation analysed 27 different climate models, each with three different scenarios.
The scientists looked at evidence from the near-past to find that between 1985 and 2007, the impact of drought on world wheat production was twice that between 1964 and 1984.
They included developing countries and low-income nations in eastern and southern Asia in their survey, because these are where half of the already hungry and under-nourished live, and where bread is an important part of people’s diet.
“The results indicate a severely heightened risk of high-impact extreme events under the future climate, which would likely affect all market players, ranging from direct influences on subsistence farmers to price-mediated changes in international markets,” they write.
• This article first appeared at Climate News Network. Tim Radford, a founding editor of Climate News Network, worked for The Guardian for 32 years, for most of that time as science editor. He has been covering climate change since 1988.
physicsworld.com/a/drought-may-hit-half-worlds-wheat-at-once/
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Post by HAL on Oct 3, 2019 21:21:13 GMT
....They included developing countries and low-income nations in eastern and southern Asia in their survey, because these are where half of the already hungry and under-nourished live, and where bread is an important part of people’s diet....
It's also these areas where the population is rising rather quicker than in others.
One could present the argument that the food supply will never be able to catch up.
HAL.
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Post by nyx on Oct 3, 2019 21:50:20 GMT
It was 101 F today on October 3rd, and this is just insane!
Never seen that before.
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Post by moksha on Oct 4, 2019 10:05:14 GMT
....They included developing countries and low-income nations in eastern and southern Asia in their survey, because these are where half of the already hungry and under-nourished live, and where bread is an important part of people’s diet.... It's also these areas where the population is rising rather quicker than in others. One could present the argument that the food supply will never be able to catch up. HAL. Very interesting, Hal.
Not bad for a silica based life form,
So what's on the Radio ?
Maybe it's me, but, sumtin seems funny about hydrocarbons.
MW .
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