From CAGE – CENTER FOR ARCTIC GAS HYDRATE, CLIMATE AND ENVIRONMENT and the unquestionable certainty about the past department:
![Plot of extinction intensity (percentage of genera that are present in each interval of time but do not exist in the following interval) vs time in the past for marine genera.[1] Geological periods are annotated (by abbreviation and colour) above. The Permian–Triassic extinction event is the most significant event for marine genera, with just over 50% (according to this source) failing to survive.](https://wattsupwiththat.files.wordpress.com/2016/08/permian-triassic-extinction_intensity.png?quality=75)
Extreme global warming caused a severe mass extinction of life on Earth 252 million years ago. It took life up to 9 million years to recover. New study finds clues in the Arctic as to why this recovery took so long.
Arctic gives clues on worst mass extinction of life
“The mass extinction was likely triggered by a explosive event of volcanic eruptions in what is now Siberia. These eruptions lasted for a million years and emitted enormous amounts of volatiles, such as carbon dioxide and methane, which made our planet unbearably hot.” says Jochen Knies, researcher at CAGE.
Life took an extraordinary long time to recover from this extinction, from 5 to 9 million years. Why recovery was so delayed, has remained a mystery.
Clues are in the Arctic
Knies is the co-author of a study that took to the Arctic to look for clues as to what limited return of life to world´s oceans. The results of the study illustrate potential long-term impacts on marine ecosystems in response to global warming.
“What used to be the northwestern continental margin of the supercontinent Pangaea is now Canadian High Arctic. There we found evidence in geological records for a significant nutrient gap during this period. This means that global oceans were severely poor in nutrients such as nitrogen,” says Knies.
This nutrient gap is most likely the result of extremely high ocean surface temperatures in the aftermath of the extinction.
Be cool stay alive
Our oceans are not a single body of water. They are comprised of layers and boundaries based on temperature (thermocline) and nutrients (nutricline) among others.
“The high temperatures caused deepening of the thermocline and nutricline in the ocean so that upwelling of nutrients from the bottom to the surface of ocean ceased. With that the marine algae productivity was stalled,” according to Knies.
And without algae, which are the base of the food chain, the life in the ocean did not thrive.
Once oceans finally started cooling 6-7 million years after the extinction, nutrient rich waters returned.
“The boundaries that kept the nutrients from reaching the surface were weakened and the ocean waters were mixed. This caused the upwelling of nutrients, resuscitating the oceans, and leading to an explosion of life. The ecosystem voids created by the worst mass extinction in Earth history were finally filled.” states Jochen Knies
In many ways the Permian-Triassic mass extinction reset the evolution of life, and paved the way for evolution of dinosaurs. They, in turn, died off in another mass extinction 66 million years ago. Today some scientists argue that we are facing a new mass extinction period, mostly caused by human activities.
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The P-T mass extinction event has not yet been fully explained, but global warming is not the primary cause, despite the Siberian Traps.
It would be nice if you could point us somewhere that backs up your claims. Without that, it’s just words.
Whereas, making the claim that extreme global warming was the cause is absolute, proven fact?
This reconstruction found the end Permian a degree or two warmer than other hot house intervals of the Phanerozoic Eon:
http://www.scotese.com/climate.htm
Other warm phases lasted longer without mass extinction events. The brief but almost as hot PETM (at the boundary between the Paleocene and Eocene Epochs of our current Cenozoic Era) produced no significant increase in extinctions.
So starting 542 million years ago, we have witnessed the extinction of Curium, Oxygen, Sulfur, Deuterium, Carbon, Phosphorous, Tracium, Judium, Potassium, Pangolium, and Nitrogen.
But it seems that most of those have recovered nicely. Do we really miss having Tracium Judium and Pangolium anymore ??
I don’t think we do.
g
Indeed, the Ordovician MEE was associated with an ice age, despite CO2 levels of 4000 to 7000 ppm at that time.
Oh I dunno, Pangolium stew with chunks of Judium and a trace of Tracium for flavor sounds delicious
Atmospheric CO2 was estimated to have increased from 1000 ppm to 1700 ppm during the P-T mass extinction. Subsequent to the P-T event atmospheric CO2 has been as high as 2500 ppm with no warming and no extinction.
If you look at the geological record planetary temperature does not correlate with the level CO2 in the atmosphere.
There are periods of millions and millions of years when atmospheric CO2 is high and the planet is cold and vice versa. This is one of couple of dozen different observations and analysis results that confirm the IPCC estimated warming for a doubling atmospheric CO2 (3C with feedbacks) is too high by a factor of at least 6 (is less than 0.5C).
http://geocraft.com/WVFossils/PageMill_Images/image277.gif
With this hypothesis they demonstrate that they have an elementary misunderstanding about the oceans and climate, and probably philosophy in general.
The warm surface temperatures are the result of the slow down or cessation of vertical overturning marine waters, which also is the reason for nutrient-deficient water in the photic zone. Phytoplankton do quite well in any temperature of water found naturally on the planet, as long as there are nutrients and sunlight.
This is grade school stuff, it –the corruption of science– is worse than we thought.
There are multiple potential explanations for the Permian extinction. The most obvious fact to consider is that the late Permian most closely resembles the “present” – in geological terms the Pleistocene and maybe Pliocene – of any period in the Phanerozoic (look up Geocarb III if you doubt this). It had an atmospheric carbon dioxide level very, very close the present, and was similar in temperature. So, a parsimonious explanation of the Permian extinction is that biological carbon fixing had depleted carbon reservoirs beyond the capacity of natural reservoirs to replace it. That in turn would result in a ecological instability and possible collapse all by itself. That in turn would reduce demands on natural carbon sources and allow a partial recovery planetary. By the end of the Triassic atmospheric carbon levels had reached about 50% the amount of the beginning Phanerozoic (about 10XRCO2 vs ca. 26XRCO2, where the present is 1XRCO2).
Geocarb III defines RCO2 as:
“RCO2 = the ratio of mass of CO2 at time t to that at present …”
It is worth considering that the extremely low levels of atmospheric CO2 during the LGM are very close to a point where primary production becomes problematic. Thus the dust levels of the Pleistocene, which are generally blamed on glacial loess, might be the result of desertification and savanna growth. The CO2 fertization effect on deserts that has been mapped by satellite imagery in the last few decades shows how well marginal environments respond to increased CO2. The emergence of Homo in the early Pleistocene is often associated with a loss of forest and increased savanna in Africa. Another factor to consider is the rise of the grasses. They emerge in the latter half of the Mesozoic. They do not however really take off as important ecological species until after the Cretaceous ends. They tolerate marginal weather conditions better than broad-leaved plants and conifers.
Turning back to the Permian/Triassic boundary, the formation of the Siberian traps ma have served to push an unstable global ecology into collapse, more because of the production of H2SO4 than because of CO2 or “global warming.” In fact, the CO2 output of the Siberian Traps could very well have lead to the Triassic ecological recovery. There is one geological fact that every climate scientis dabbling in geology seems to ignore: there has never been any period remotely resembling a stable atmospheric CO2 level. The closest are the present and the late Permian.
At least eight different scenarios have been plausibly posited, with some evidence. Even some explanations that do rely on global warming don’t blame CO2 alone, but methane, either from clathrates or microbes.
An hypothesis from 2014 implicates global warming from GHGs, but not CO2. Rather, the authors suggest that methanogenic microbes were to blame:
https://www.sciencedaily.com/releases/2014/03/140331153608.htm
The scenario reported in this post relies instead chiefly on volcanism from the Siberian Traps, made worse by burning coal deposits.
Personally, I’m partial to the hydrogen sulfide hypothesis, as outlined in this link from 2005, elaborated more recently by Japanese researchers.
http://adsabs.harvard.edu/abs/2005Geo….33..397K
But, as I said, about half a dozen other hypotheses have been proposed. It would have been easy for you to find them.
I saw a TV documentary a few days ago about a huge crater possibly discovered beneath a deep ice layer on Antarctica. The crater came–if it exists, as evidence seems to show–from the impact of a decent-sized asteroid which blew up, creating a hole several times the size of the one near (?) the Yucatan Peninsula. Other effects included dust for a long time, and a reciprocal blast in Siberia (shock wave going all the way around the earth and meeting up with itself on the other side) with many effects of its own. I wish I could be more specific, but I was fixing supper at the time and could pay attention only intermittently. I did catch, however, the implication that this combination of events led to a large and widespread extinction.
The Wilkes Land Crater and other impact hypotheses have gained less support recently. This article from 2006 however proposes the Antarctic impact conjecture:
http://www.space.com/2452-giant-crater-tied-worst-mass-extinction.html
There was a recent paper that suggested that the earthquake from Chicxulub impact may have greatly boosted size and rate of the Deccan eruptions, even though it was not in an antipodal position:
http://gsabulletin.gsapubs.org/content/early/2015/04/30/B31167.1.abstract
It is known that earthquakes can trigger or reinforce eruptions and an “asteroid earthquake” is orders of magnitude greater than any conventional earthquake can ever be. And there is evidence from Australia and Antarctica that a major impact occurred somewhere in the southern hemisphere near the P/T boundary.
If such an impact occurred, odds are that it would have happened in the deep ocean, and seafloor is almost all younger than 200 million years, so we shouldn’t really expect to find the crater, if there ever were one.
As cold is more deadly than hot, it is more likely that the low solubility of nutrients caused by the excessively cold oceans, as a result of a long period of volcanic eruptions—recognizing the decreased insolation from all of that extended atmospheric dust and such—was the factor that starved the recovery of life on Earth.
Why do they always ignore so many critical but obvious factors that need to be considered when claiming a particular result. Oh, wait, they have to cull out all factors that do not fit their narrative. It’s an agenda. Okay, then.
The traps also produced SO2 in large amounts together with CO2, H2S, HCl and HF.
Gabro,
How come you don’t spell your name with two “B”s? Do you use a German spelling?
Clyde – after the River??
Gabro
Ga Bro – Georgia Brother. That, I guess, is an American spelling.
Perhaps.
But PROBABLY not.
Gamro – G. AmRo could be Guatemalan/Dutch [Amsterdam/Rotterdam] spelling, but – conceivably – is not. Even were it used.
Gam Ro – GAM [Collective noun for whales] RO – Rorquals.
Enough for the evening, I think.
Auto – autochthony as it is spelt.
The plutonic rock is spelt the same in German as in English, ie Gabbro. But that’s not the source of my name. Schist is of course a geologic term.
But, but I thought that volcanic eruptions dropped the temperature……
The claim that the temperature rise was the cause is not explained by the paper either. It is instructive to know we are talking about CO2 at 3000ppm or nearly 8 times today’s levels and temperatures 14 degrees C higher than today not 0.3C. There was also massive amounts of methane and other gases. Over the next several 100 million years temperatures stayed 5 or more C above current levels and this is when almost all life we know today evolved.
It is important to note that although temperatures rose incredibly rapidly according to the geologic record indicating something catastrophic like a giant meteor strike or some gross instability in the earths crust releasing vast amounts of material we don’t know if it was the heat or the chemicals released, the immediate cause of death could have been extreme heat far above 14C due to whatever caused the event, or materials in the environment. There is no causal link between the death and temperature. It is an assumption.
This assumption is weakened in terms of its relevance because if temperatures 4C or higher above current levels were toxic to human or plant life then it is hard to see how life managed to emerge and prosper after that period given the extremely toxic environment posulated by 4C above todays temperature. The evolution and prospering of life during this period would indicate the opposite, that in fact temperatures up to 10C higher are probably not toxic to most currently evolved biota on the earth that has emerged since 200 million years ago.
Seems like another case of proxies all the way down.:-)
Yeah, it was totally the heat…never mind the russia sized sheet of lava miles deep erupting for thousands of years and an ocean that had gone so acidic that a large percentage of what should have been fossilized shells vanished. No…it was totally the heat and there was nothing else important going on.
And anoxic. Ocean anoxia is a major contender for the main culprit.
Absolutely! Now, write a paper, put “PhD” behind your name, and publish it. Some prestigious journal will publish, no questions asked, and you, too, can be famous as the globalwarmist world sings your praises for upholding the honor of true science.
You would be the world’s leading authority on the Phosphorous-Tracium extinction.
And also the only person on the planet with any interest in that. So start looking for a post doc fellowship if you can’t find a real job.
G
When they use the term ‘global warming’ for this natural disaster in the distant past they must know that they are mixing it with a politically loaded term in its modern meaning. It draws a parallel between the two and implies they are the same sort of phenomenon and danger level. Then at the end they specifically draw another parallel between the Siberian Traps and “human activities”, implying directly that modern global warming caused by CO2 ill lead to the same sort of extinction as in the past. There is no logic in this, since the two are completely different in cause and effects. There is no scientific reason to make this analogy. It can only be to garner attention by fishing for an emotional reaction.
Of course this is just spinning to try to bolster the crooked consensus.
The fact is that for most of the Permian, earth was still in the ice age which began in the preceding Carboniferous Period. This naturally produced low CO2 levels, around present day or lower, although perhaps not as low as during the Pleistocene glaciations. CO2 did apparently increase in the Late Permian, so that the average concentration for the whole Period is estimated to have been around 900 ppm.
But CO2 was much higher both before and after the Permian, without an associated mass extinction event.
The estimated average for the Carboniferous is around 800 ppm, with higher early on, at the time the ice age began, then lower later due to the cold conditions.
The estimate for the following Triassic Period however, during which time recovery from the P-T MEE occurred, was 1750 ppm, ie double the average for the Carboniferous and Permian. In the following Jurassic, it was 1950 ppm and 1700 ppm during the Cretaceous Period, which was generally warmer than the Jurassic, indeed downright hot.
“Crooked consensus”
If you can’t respond to science with science, resort to personal attacks.
@Yushchyshyn,
The so-called consensus is Cooked, not crooked…
https://wattsupwiththat.com/2015/03/18/anatomy-of-a-collapsing-climate-paradigm/
Jim,
But it is objectively crooked.
Read the emails. Although everyone watching closely already knew that the perps were crooks and shameless liars, all for “the cause”.
“Today some scientists argue that we are facing a new mass extinction period, mostly caused by human activities.”
Gotta love the line added by the grants administrator.
A quick perusal of Bill Illis’ graphs from a few weeks ago shows that
1) proxy delta-O-18 temperatures were in decline through the late Permian, and into the early Triassic;
2) most of the diabase was erupted during the two-to-three million years AFTER the terminal extinction event had occurred; only a small part of it took place in the late Permian;
3) volcanic aerosols typically produce cooling by partially blocking sunlight;
4) the extinction event was several million years long, culminating in a “sudden” (geologically speaking) terminal event (Araganty? Wilkesland?) at the very end of the Permian (and “sudden” geologically is [up to] several tens of thousands of years).
Yet another example that to get published and funded, you have to make it “global warming”, not global cooling (which it was).
Vlad
The trilobites had been declining for many millions of years (since the Devonian) until their final extinction at the P-T boundary.
I agree, it doesn’t seem to be a simple story.
Nutrient poor waters in one place now in Canada does not mean nutrient poor elsewhere. Ocean current upwellings are not uniformly distributed. The ‘explanation’ lacks global credibility.
There is evidence even in the Red Sea for significant ocean acidification from eruptive SO2 and CO2 from burning what are now Siberian coal seams (even ‘fly ash’ and ‘soot’ in Chinese lakebed sediments). It would take millions of years of erosion to rebuffer the ocean chemistry. So that is a competing hypothesis. Another is that with such a great loss in biodiversity in an adverse environment, evolution simply took a few million years to rediversify complex ecosystems.
IMO that is also why it took well into the Triassic for diversity to recover, although the time actually required is a matter of some debate.
The most likely “cause” of the Permian extinction is an excessively efficient ecology confronted with an inadequate natural carbon supply. It becomes inherently unstable. The system through one or more triggers finally goes TU. Not all life vanishes and as natural carbon supplies replenish the level of available carbon, things begin recovering. Depending precisely on when the Siberian traps are forming, they could either have helped trigger the final Permian collapse, or through volcanic CO2 releases and burning coal, helped with the ecological recovery following the extinction, or possibly both. There almost certainly is no neat single “cause.” It is notable that the Mesozoic recovery never sees available carbon levels reach more than about half the Paleozoic levels and we are now back to late Permian levels, which, I submit, really is something to worry about.
From the article …
“And without algae, which are the base of the food chain, the life in the ocean did not thrive.”
…
– web definition of algae:
Algae – is an informal term for a large, diverse group of photosynthetic organisms
As we know, photosynthetic means that algae consumes CO2. So, rather than algae being the base of the food chain, it should read:
CO2 is the base of the food chain
It’s unclear whether the authors mean actual algae or cyanobacteria, often incorrectly called “blue green algae”.
[ Cyanobacteria /saɪˌænoʊbækˈtɪəriə/, also known as Cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis ]
CO2 is the base of the food chain … as it is today, for all Carbon based life forms.
Let’s say a volcano opened up in the middle of the US and then poured 1/2 km of lava across the entire continental US. Thats how big the Siberian Traps volcanoes were.
Besides everything in the US becoming extinct, the rest of the Earth suffers considerably with all possibilities including the atmosphere becoming poisonous, to oxygen levels falling below life sustaining levels, to no sunlight for the million years it lasted to basically anything.
http://whyfiles.org/031volcano/images/paleomap.gif
The do18 isotopes show that the Earth actually cooled off considerably during the extinction event and was much warmer 15 million years before the event (when no extinctions occurred)
The proposed reason the Siberian Traps extinction were so much more calamitous for life was that, unlike the Peruvian traps which erupted through a desert floor crust, the Siberian Traps erupted through massive coal beds laid down 100 my earlier during the Carboniferous.
You often see that claim, but no. There is barely any coal in the area, but there are deep organics-rich shale deposits.
Aha!
There was coal, but it all burned up!
So there.
(Just kidding.)
Actually, there were (are still are nearby) large coal-fields in the Siberian Traps region. But does several metres/100 metres of coal compare to the 4,000 metres of lava erupted from deep within the Earth. The outflows were 4 kms high on average in the region.
The coal fields are just a misdirection from the CO2 crowd. Any rock heated to lava-type temperatures will outgas any number of unusual gases that goes into the atmosphere.
I think any series of volcanoes this large, or the main event which happened right exactly at the timeline of the Extinction Event, indicates that …
… the atmosphere was just not breathable (for complex Oxygen-breathing) organisms. Try breathing in some fluorine gas for an hour or so and see what happens. Now do that to every animal and sea creature on the planet for several days at a time about 10 times per year lasting over 100,000 years or so during the main event and see what happens. Let’s say Oxygen levels were burned so fast up so that the atmospheric level fell from a quite high 26% at the time (ie fires were unstoppable at the time without days and days of rain) to just 13% because of all the burning caused by these absolutely massive lava outflows.
ie. The organisms are all gone. Maybe it was not that bad but it probably was.
What is also interesting that of the land animals at the time, let’s say there were four basic types. The mammal-like reptiles (which were completely dominant at the time and contained some species which were very, very mammal-like), reptiles, others, and a single reptile that had directly forward leaning legs versus the other reptiles and mammal-like reptiles which had legs which leaned outward like alligators today.
The reptile with the directly forward leaning legs survived (and a few reptiles and a few amphibians etc.) and only one of the mammal-like reptiles.
The reptile with the directly forward and backward leaning legs led to the dinosaurs (which dominated the world for the next 185 million years, the more efficient locomotion was very advantageous) and the sole reptile-like mammal which survived, lead to the mammals and us 185 to 240 million years later.
That is how tight this extinction was.
Bill
Is that Lystrosaurus you are referring to (burrow-dwelling mammal ancestor)?
Bill
Great explanation, map and palaeo data.
But “ice cores” in the temp / CO2 figure cant be right – what ice cores go back 275 million years?
The dO18 isotopes come from many, many different cores (ice cores going back to 800K years ago, ocean crust cores going back to about 400M years ago and dated continental/inland sea cores going back to 3.5B years ago) Altogether, there are about 24,000 individual estimates so this is a very big database.
This is just a zoom-in of the complete record so one can see what happens right at the Permian Extinction Event but one can do a zoom-in for any period or cover the whole 3.5 billion years of the record (note the CO2 numbers don’t really go past 750 Mya except through the some experimental techniques.)
It’s fantastic data. It refutes by itself the idea of CO2 being a strong or dominant warming agent. It’s an anti-PETM. More should be made of it.
Just not enough stratigraphic information to make such a claim. The Permian began during the middle/end of a major glaciation, new species (we’re talking primarily marine species in Permian event) responded to that change (including to lower sea levels). As the Permian continued, Pangaea became more elevated and the intercontinental seaway’s that dominated the previous 250 my disappeared. Major marine species reorganization (and specialization) took place, while globally the climate became drier over most of Pangaea, which likely means greater dust production, and as we see today downwind of major deserts, a potential increase in Fe and Al production seeding the oceans surrounding Pangaea. At the Permian event, multiple activities changed, less shallow marine production, wetter climate, sea level fall, Siberian volcanic activity, which are all potential tweaks to species in major turnover at the extinction boundary….
Seems likes lots of hand-waving going on here.
But to be sure, the (Permian-Triassic Boundary) PTB mass extinction event from the Siberian traps released about vastly more carbon dioxide more than even the worst case, high-end scenarios of anthropogenic carbon releases. The more likely modern anthropogenic scenarios put future pCO2 in the 650 ppm to 1200 ppm range if all extractable fossil fuels are burned to reservoir exhaustion. The pre-PTB pCO2 is estimated to have been around 3X Present Atmospheric Level (PAL), around 1000-1200 ppm. During the PTB, two extinction-associated pulses of carbon release are observed in carbon and boron proxies. Extinction Pulse 1 (EP1) changed the exisitng pCO2 very little, but EP2 was much different. Educating oneself on the existing literature finds this Science article from April 2015:
Realize that 20 PAL is around 20x400ppm= 8000 ppm. So we can turn off the alarms for anthropogenic carbon alarmism.
Another explanation is built around the discovery of a massive impact crater buried under the ice in Antarctica that has geologically been dated to about the same time period. This crater is the largest that has been discovered on Earth.
Yes and Right next to the pyramids under 2 miles of ice. Amazing!
You gotta love it. The PT extinction explained in a paper by PT Barnum.
You could look at it this way.
“The mass extinction was likely triggered by a explosive event of volcanic eruptions in what is now Siberia. These eruptions lasted for a million years and emitted enormous amounts of volatiles, such as carbon dioxide and methane, which made our planet unbearably hot.” says Jochen Knies, researcher at CAGE.
Yet life on earth survived. 30% of life on land and 4% in the oceans. However, present day global climate change is dooming us all!
Look at the map of Pangea and see where the Paleo-Tethys Ocean is. This ocean was relatively enclosed by land and situated at the equator and situated where the Pacific Warm Pool region would have been 251 million years ago. And then the Paleo Pacific Ocean was 50% wider than the current Pacific ocean is.
Ie. the Trade Winds were constantly moving hot water in from the equator from a very wide ocean (on a planet that was up to 10.0C warmer than today already).
Ie, Periodic ENSO-like events probably pushed the Paleo-Tethys Ocean temperature into the 42C to 45C temperature range. Being relatively enclosed it might have even gotten warmer.
This is “too hot” for complex lifeforms and it probably only contained bacteria for extended periods of time.
Can you say anoxic dead ocean and all sea-life dying. Just a function of a warmer world with a certain geographic alignment.
There is good evidence that some marine organisms can tolerate temperatures in that range:
https://www.academia.edu/4187075/Shallow_water_hydrothermal_vent_field_fluids_and_communities_of_the_D._Jo%C3%A3o_de_Castro_Seamount_Azores
Ocean anoxic events are a life’s work in their own wright. There are many, many more than during the PTr extinction. What strikes me about the PTr is how low sea level was.
The apparent difference between the PTr and the Cretaceous “hothouse” is that sea level was much higher in the K. (Not looking so good for us now if it gets hot unless we coax sea level up a bit)
So what is sea level? It is some unknown combination of more or less water and whether the isostatic lift is under the ocean or under the continents. During the Cretaceous the Large Igneous Provinces were largely sub oceanic, displacing water onto land. Lots of shallow water above the carbonate compensation depth. Inland seas cover much of North America.
Reverse the scenario and lift Siberia. Sea level drops. The volcanic gasses, rather than being bubbled through the ocean, burn through the much distilled continental crust laden with Boron, Chromium, Cobalt, et al. and inject directly to the atmosphere…
Here’s a site that shows how the Dead Sea responds to high summer T: http://isramar.ocean.org.il/isramar2009/DeadSea/seawindbasic.aspx
Hoo, what a stunning series of falsehoods.
From one news article to another, then to another, on and on; each with fantastic claims and echoes of doom.
Phah!
One keeps link through to an article’s source; eventually one ends up where the rumor mill starts.
How “delayed recovery” transmutes into “Extreme global warming caused a severe mass extinction of life” is because alarmist folks wrote their own bias into the titles.
The ‘study’ still translates into a small bit of geological research buffed into a glorious ‘end of life’ 3D Godlike fantasy upon which all of Earth depends.
As always in these cases the actual paper ”Early Triassic productivity crises delayed recovery from world’s worst mass extinction”
¨
(http://geology.gsapubs.org/content/early/2016/08/05/G38141.1.abstract)
is a lot less dramatic than the press release.
Essentially it concerns changes in nitrogen isotope ratios over the P/T boundary and Early Triassic from three sites in Arctic Canada. They interpret these as indicating that upwelling ceased for a prolonged period. If this was true I would expect the other (and usually more critical) nutrient involved in upwelling, i e phosphorus to also decrease. However it does not, if anything the amount of phosphorus increases in the Early Triassic above the P/T boundary which seems extremely strange if there was no upwelling. Also when marine conditions return to normal in the middle Anisian nitrogen isotope fractionation actually goes down a bit, not back up. It is clear that there were dramatic changes in ocean nitrogen chemistry at the P/T boundary, but it seems quite unclear what they were and what caused them.
To return to the rather more lurid press release: volcanoes of course do not erupt methane. The Siberian Traps did erupt through an organics-rich sedimentary basin that may have enhanced CO2 emissions. However the idea that methane, which even breaks down in just a few years in the atmosphere, would have survived passage through a volcano is absurd.
I am always troubled by claims using imprecise dating. According to Burgess et al.,
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3948271/
“The extinction occurred between 251.941 ± 0.037 and 251.880 ± 0.031 Ma, a duration of 60 ± 48 ka.”
This may be precise in geologic terms but how applicable is that to climate. If Sir Charles Lyell is correct and the present is the key to the past, then how much climate change occurred in the same period counting back from today? It is critical because you must have the right sequence of events to determine cause and effect.
Tim,
James Hutton, not Lyell.
But it was put into main stream thinking by Lyell, whose book “Principles of Geology” accompanied and greatly influenced Darwin’s thinking while on his Beagle voyages.
The last sentence is the good one “Today some scientists argue that we are facing a new mass extinction period, mostly caused by human activities.” I think that life on earth is more at risk from nuclear weapons or pollution side effects than any possible human caused climate changes – unless some silly buggers try to ‘fix’ the ‘climate crisis’ by experimenting with terraforming the earth. Frigging scary that one!
I will look at my crystal ball… I say that a series of strikes from a breaking up comet caused … whatever you want. At least my theory has a witnessed event in recent history on Jupiter to back it up as possible. Since current science is no longer theorize, then attempt to prove… I could be just as right as the author of this article. Heck my supposition could have even caused his volcano. If I could spin in Co2 bad… I could probably even get funding:) If I can somehow make it man’s fault.. damn.. I’d be rich. Its sad, Science has fallen back into the dark ages. If the kings of funding do not like your science you are labeled a heretic and with the current mood of the climate science cult.. I suspect the burned at the stake part is not far behind.
Sorry folks, parks closed. The moose out front should have told you.
I love that movie.
oh and the whole Pangea theory seems to be in question as well. http://www.newgeology.us/presentation20.html So if you base your unproven science on other unproven science .. do you get a special prize?
a grant from the Gov’t. PseudoScience is the craze these days.
Considering the P-Tr extinction was especially devastating to marine life, I would think that the main culprit among the emissions from the formation of the Siberian Traps would have been oxides of sulfur, a major component of many volcanic emissions and a powerful acid, which could have lowered the pH of the oceans significantly.
Methane is NOT a significant component of volcanic gases, but rather originates primarily in sedimentary rocks from anoxic decomposition of organic compounds (fossil plants and animals). The speculation of the late Tommy Gold concerning ‘primordial gases’ being trapped in the molten mantle rock was never borne out by empirical investigations.
Most of the petrochemical carbon dioxide is also produced in sedimentary rock by the action of acidic water (rainwater) on carbonate minerals.
Sulfur is released from magma through the thermal decomposition and oxidation of sulfide minerals. Even today volcanoes are major sources mined sulfur (Google ‘sulfur mines’). Some volcanoes are *continually* emitting sulfur oxides from the ‘perpetual’ flames of burning sulfur.
Ask them to prove it!!???
Great documentary on this. They go through a number of potential causes and end up with the volcanos splitting Siberia apart. Over 1,000 mile long volcanos. Spoiler alert, it took 75,000 years of this to warm the earth enough to cause the extinctions…,
http://www.dailymotion.com/video/xw5o16_the-day-the-earth-nearly-died_sho
Wouldn’t a volcano 100,000 miles in length not warm the atmosphere? That warming wouldn’t be due to CO2, it would be due to the lava. A 100,000 mile long volcano, erupting for million of years would warm the atmosphere, but that would have nothing to do with CO2, just like the year without a summer wasn’t due to CO2.
I didn’t know coal burning power plants and SUVs existed 252 million years ago.
Yes, they were both very common until Consumer Reports called them out as unsafe at any speed. It took them literally forever to come back. [does tongue-in-cheek count as ‘sarc’?]
Surely you have watched Fred Flinstone?