From the “this is not the looney chemtrails idea” and the “how much of this can be attributed to climate jet-setter Bill McKibben?” department, comes this data.
Guest essay by Don Spencer
The recent “hiatus” in the global temperature record has thrown a dark cloud on carbon dioxide’s position in explaining climate change. Whereas the temperature record has been relatively constant for the last fifteen or so years the atmospheric carbon dioxide concentration has increased more-or-less unabated casting doubt over its influence. Climatologists have been scrambling to explain the temperature hiatus as just that, a hiatus or pause, where the greenhouse energy is temporarily stored away in the ocean to [wreak] its vengeance on us at a later time.
But maybe the simpler explanation is that we are backing the wrong gas and water vapor is the really important greenhouse gas, after all it currently accounts for more than 85% of the current greenhouse effect that supports life on this planet. Water vapor is a more effective greenhouse gas than carbon dioxide by virtue of its asymmetric molecular structure that allows more vibration modes hence more opportunities to capture and adsorb radiant energy.
Andrew Dessler and colleagues from Texas A&M University in College Station confirmed that the heat-amplifying effect of water vapor is potent enough to double the climate warming caused by increased levels of carbon dioxide in the atmosphere
The trouble is that global water vapor concentration is difficult to measure and even harder to pin on humans. However since WWII humans have been conducting a great atmospheric seeding experiment. Thousands of large flying machines have been circling the earth day and night releasing millions of tons of water vapor into the upper atmosphere. The fuel used is typically kerosene (C12H26); when a molecule of kerosene burns in oxygen we ideally get twelve molecules of carbon dioxide and thirteen molecules of water vapor and a bunch of heat.
To estimate the amount of water vapor and carbon dioxide released we can look at the global aviation fuel usage from 1984-2010 which was obtained from
http://www.indexmundi.com/energy.aspx?product=jet-fuel. Note these statistics include both kerosene and naphtha aviation fuels.
We can see the consumption was less than two million barrels/day in 1984 and has risen to about five million barrels/day in 2010. The growth rate since about 2004 has been modest due to significant improvements in airliner efficiency. In the next figure the GISS global temperature has been plotted against the aviation fuel consumption. The correlation is quite good, better in fact than that for carbon dioxide. So if we all stop flying will we save the earth? Maybe, maybe not, as correlation alone does not necessarily imply causality but we do have a viable hypothesis, water vapor is a significant greenhouse gas and we are injecting vast quantities of it into the atmosphere via air travel. The temperature hiatus (if it is a hiatus) is explained by lower consumption and emissions due to more efficient jet engines. If this mechanism were correct and we did stop emitting water vapor then the atmospheric water vapor would soon reach a lower equilibrium and the temperature should fall back.
It is interesting to speculate what might happen if we do back the wrong gas. We shut down our fossil systems; coal-fired power stations, hydrocarbon based transportation and replace these with say renewable or nuclear energy and develop a “green” hydrogen economy producing nothing but “clean” water vapor. We would stop our CO2 emissions but vastly increase our water vapor output. This could actually make the earth warmer so we must make sure we get it right. The right answer is not known, more real science is needed with all hypotheses on the table.
Air traffic! The elephant(or jumbo)in the room?
Tee hee.
Real time aircraft movements at Heathrow –
http://www.flightradar24.com/51.48,-0.46/13
(Hover cursor over plane for its call-sign, click for full details. You can drag & expand map to give the whole worlds commercial aircraft positions & identify each one. Times out after 30min, just reload page.)
At full world expansion it’s staggering how many planes in the air at any given time.
zoom the picture out and you can see the traffic worldwide!!
Nice, thanks!
All those contrails are increaing the albedo. Thus more air traffic = global cooling! /sarc
Actually, remove the /sarc. One of the mechanisms for the Sun’s influence on climate, besides the obvious, is that changes in the Sun’s magnetic field increase or decrease the dosage of cosmic rays hitting the atmosphere. The cosmic rays (actually ions traveling at close to light speed) end up triggering cloud formation, and it is the increase or decrease in high-altitude clouds that effect the climate. An increase in aircraft traffic, therefore, emulates an increase in cosmic-Ray cloud formation.
Cosmic rays also turn Nitrogen in the atmosphere into radioactive Carbon 14 which AGW ers claim is falling in ratio to C12 and C13….
I am confused. They are saying that more water vapor is more warming, or at least that was how I understood the carbon dioxide/water vapor feedback to be. So now they are saying that the high level water vapor is causing the cooling? So not only do we have magical carbon dioxide but we also have magical water vapor and they combine to form magical weather and magical climate that magically explain everything extreme, so don’t burn coal for energy. Now I understand why they move the COP(x) around the world. So everyone can fly to the next one and in so doing. prevent the world from having a fever.
There is little to no water vapor in the stratosphere, clouds are very rare, but clouds are either water or ice, not vapor which is invisible. Aircraft exhaust is enriched in CO2 and water, the water quickly freezes into visible contrails.
At lower elevations, there is considerable water vapor in both the clear sky and in clouds, so whether lower elevation clouds warm or cool is a matter of emerging reseach.
Has anyone ever run the actual air traffic numbers? The Honolulu International Airport opened in 1960-the same year Mauna Loa started recording “CO2”. Traffic between 1960 and 2006 increased from 222, 000+ landings and takeoffs at HIA to over 20,000,000! Thats a lot of additional CO2 and water vapor over Mauna Loa (which sits on a volcano too)
What about the other CO2 stations and air traffic increase?
I might accept that we are contributing to the atmospheric water vapor and therefore are contributing to the “Green House Effect”, although our contribution may not be having a measureable effect.
Since 1850, however, the atmospheric temperature rose at a similar rate well before we were began global jet travel, which makes me highly skeptical that our contribution is more than extremely minor.
Buzzkill. 🙂
/s
I am laughing so hard I’m almost crying here…:)
OK, before everyone starts building on the CAGW false premise, try this ….
Greenhouse gasses (including CO2 and water vapor) absorb IR and then emit IR downwards, thereby warming the Earth, right? Everyone knows that of course. Problem is they also emit IR upwards – into space. ‘So what?’ you say. If you increase greenhouse gasses, the IR emissions will obviously also increase, both downwards and upwards, right? Of course, everyone knows that as well. OK, if IR emissions into space increase due to increases in greenhouse gasses and the energy input from the sun does not change then the temperature of the Earth will do what? Riiiiiiight! The temperature of the Earth will go doooown!
Greenhouse gasses are radiative gasses – they radiate IR in all directions, not just downwards. They radiate into space as well as back to Earth. Obviously,increasing IR radiation into space will cool the Earth – not warm it!
Now, armed with this apparently new information, re-read the post again and try not to laugh out loud when you see how far they have built on that CAGW false premise!
Google ‘isotropic’ and then reconsider the greenhouse effect – you don’t need to be a rocket scientist for the penny to drop.
Um, I don’t think so. The greenhouse effect comes into play because without any IR active (i.e. greenhouse) gases the atmosphere would be IR transparent and ALL IR leaving the ground would radiate to space. The greenhouse effect means that some of that gets reradiated back to Earth. The greenhouse effect is real alright – just small, easily saturated and not apparently amplified by water vapour and clouds as the cagw hypothesis erroneously assumes.
Bernard, what you are failing to understand is the balance.
Starting with the trivial case of no atmosphere, All IR Radiation from Earth’s temperature will go up and never come back down.
Now, add an atmosphere. The Sun is still beating down. The blackbody radiation is still going up. However, some is absorbed in the atmosphere by the gases. Once it absorbs, half re-radiates up, and the other half re-radiates down, going back to the surface. This heats up the surface until the total amount leaving the atmosphere comes into balance.
So, the effect is that there is an increase in temperature based on the amount of upwelling radiation that is absorbed. Increase absorbed radiation and you increase the surface temperature. Other effects, such as cloud cover, fluid dynamics, and all the rest make the answer for magnitude much more complicated, but it does not change the direction of the effect. Adding CO2 to the atmosphere will warm it. As for how much, I’ll leave that lecture to Viscount Monkton.
As a general rule, If you have an objection based on elementary physics, typically it’s your understanding that is the problem.
Good try, and almost right.
For the upper atmosphere you have it right, it increases the emission of radiation to space. Thus the upper atmosphere is cooled just as you say.
For the lower atmosphere, the upward radiated photons get absorbed by other GHGs instead of making it to space. Thus for the surface / lower atmosphere, you get warming.
The above is standard atmospheric radiation physics that the consensus AGW warmists would agree with conceptually (there may be argument about the details of a quantitative analysis, but that’s the basics.)
Relative to this discussion there is 1 huge question:
– Is the water vapor effect from jets being felt above or below the altitude where the transition from warming to cooling is?
My guess is that as long as the air is thick enough to allow a jet to fly, it is the warming portion of the atmosphere, but answering the question is non-trivial.
You have to consider the emissivity and the spectral qualities of the heat sources relative to the atmosphere.
The surface of the planet converts visible light to 15um IR. CO2 just happens to be more opaque in that spectrum.
Of course, it’s still true that solar radiation is being blocked more with increasing CO2, and many measurements back this up.
At the surface half the radiation is above the horizon. As you gain altitude a greater proportion of radiation is above the horizon because the horizon becomes a downward angle. Ergo, the chances of CO2 radiation leaving the earth system is a function of altitude and most CO2 is well above ground level.
looncraz
According to Wein’s equations the emitting surface must be must be at about minus 80 deg C to peak in the 15 micron band. I don’t know how wide those emissions bands are but seems unlikely that CO2 would warm anywhere other than very cold areas of the globe where I am sure it would be appreciated!
John
We can see the consumption was less than two million barrels/day in 1984 and has risen to about five million barrels/day in 2010.
5 m * 365 = 1,825 m barrels per year.
Evaporation of water from the surface of the earth is the main process providing water vapor transport to the atmosphere. On average 1,130 mm (or 577,000 km^3) of water are evaporated from the surface of our planet during a year.
Evaporation of water from the surface of the World Ocean and land of the planet is the main process providing water vapor transport to the atmosphere. Evaporation of water takes much heat (1.26 x 10^24 joules), or about 25% of all the energy received at the Earth’s surface.
http://www.eolss.net/sample-chapters/c07/e2-02-03-02.pdf
1,825 m barrels converts to 0.29015 km^3 (https://www.unitjuggler.com/convert-volume-from-bbl-to-km3.html?val=1825000000)
0.29015 km^3 into 577,000 km^3 is not even a rounding error. [And water vapor is only a fraction of the total.]
If this mechanism were correct and we did stop emitting water vapor then the atmospheric water vapor would soon reach a lower equilibrium and the temperature should fall back.
But nature is a bit lazy and will only carry so much water, then she sheds a bunch of heat energy way up high in the sky, and the water falls down. The minuscule fraction of man made contribution of water makes no difference.
But our CO2 emissions are just a rounding error too! “Some say” (h/t Top Gear) that that rounding error is driving change, so why not water instead? At least it correlates, which is better than with CO2 :).
“We can see the consumption was less than two million barrels/day in 1984 and has risen to about five million barrels/day in 2010.”
And they want to stop Keystone at ? what? Less than a million barrels a day? At least a pipe line doesn’t emit vapors at that rate.
UFO contrails.
Doesn’t help with the 1930s warming or the mid 20th century cooling though does it ?
Nor the Roman Warm Period, Dark Ages, Mediaeval Warm Period and Little Ice Age.
More thought required.
Just perhaps that “more thought required” should start at “CO2 don’t do what they think it does”.
mark
Kudos – almost lost the monitor as your comment sank in!
Auto
Ok, five million barrels of oil. That’s 790 million liters. In atmospheric terms that’s nothing. You don’t even need to know exactly how much water vapor per liter of kerosene you’ll get, it’s a rounding error.
Well, there can be some multiplicative effects. For example, the water vapor and combustion products that makes contrails, when applied to supersaturated air, creates many more ice crystals than the water released from the fuel. Of, course, that’s expected to reduce temperatures by increasing albedo.
With adequate handwaving, you might be able to claim that the ice crystals settle downward leaving behind merely saturated air. However, that snowfall generally evaporates, so you may not be removing water vapor at all.
If we are concerned about manmade water vapour emissions, this is a very small percentage of the water vapour that man emits as a consequence of burning fossil fuels ie., those other than coal (which produces only a small amount of water vapour as a by product of cooling) such as burning natural gas lpg etc.
The IPCC does not count manmade water vapour because apparently it has a very short half life measured in weeks. However, that misses the point since man burns Gas on a 24/7, 365 days a years basis, and hence irrespective of the half life of water vapour, we are emitting and replenishing copious amounts of water vapour every day of the year. The amount of water vapour that is in the atmosphere today, as a consequence of manmade activity is considerably more than was the case say back in the 1920s.
So if one is a signed upped to the GHE theory, one has to question whether burning gas is better than burning coal. Gas produces far less CO2 but then again, it produces approximately an equal quantity of water vapour, and water vapour is a more potent so called GHG. So what is the net effect?
“The IPCC does not count manmade water vapour because apparently it has a very short half life measured in weeks. However, that misses the point since man burns Gas on a 24/7, 365 days a years basis, and hence irrespective of the half life of water vapour, we are emitting and replenishing copious amounts of water vapour every day of the year.”
Somehow this doesn’t seem to get mentioned very often (if ever).
@richard verney January 6, 2016 at 5:53 am
Also, they say water vapor isn’t a “forcing”, it’s naturally balanced.
OTOH, it’s a “feedback”.
“we are injecting vast quantities of it into the atmosphere via air travel.”
Vast quantities? Compared to what? All the water vapour in the worlds atmosphere? I think the exaggeration is much greater than previously thought.
Stephen,
Exactly.
Humanity is large – but our Planet is huge.
Just try sailing oceans at 15 knots – it takes days [of 24 hours, ships don’t stop at night] to get anywhere.
From the Oil Gulf to NW Europe, via the Cape of Good Hope, is about 30 days – fifty days at economic speed of about 9 knots.
Auto
“we are injecting vast quantities of it into the atmosphere via air travel.”
Vast quantities when compared to NO quantities prior to human flight?
Interesting hypothesis. Mankind can and does effect the atmosphere/weather/biosphere with his activities. Increasing atmospheric CO2 is having a large consequential effect on C3 plant growth. I’m guessing the natural variations in water vapor in the boundary layer where most jets fly simply overwhelm any exhaust contribution. Huge amounts of water vapor get pumped into the boundary layer by normal weather phenomenon. Lets not give the greenies any new causes without cause. More research is needed.
Ok…now add in all the OTHER ways that humans add water vapor to the atmosphere. Almost every form of combustion produces water vapor. Factories release steam. Etc…and the warmer the planet gets, the more water vapor in the air increases by evaporation. Not blaming humans for anything…just saying…it ain’t just JETS.
What if there is no cause? What if we decide that there is nothing to be explained? The fluctuations are random. The system is self-regulating, What if climate should be treated like weather. When we have a heat wave we rarely look for an external cause.
that is a strange regression equation
Yes. Since the data is concave upward (section of a parabola), you should be able to get a nice least squares fit with ax^2 + bx + c.
I am certain that plotting an anomaly vs a daily quantity is nonsense! This is an abuse of statistics.
You beat me to it.
Calculating anomalies requires there to be “correct” values, but there aren’t any correct temperature values from which to deviate. So this is junk-science.
David Riser said-
“I am certain that plotting an anomaly vs a daily quantity is nonsense! This is an abuse of statistics.”
You said-“You beat me to it. Calculating anomalies requires there to be “correct” values, but there aren’t any correct temperature values from which to deviate. So this is junk-science.”
Why?
Trend line- “a line indicating the general course or tendency of something, e.g., a geographical feature or a set of points on a graph.”
It’s entirely possible and scientific, to plot a TREND LINE on ANYTHING in which you want to indicate a “general course or tendency”.
The trend line has NOTHING to do with whether or not the data points (be they anomalies or actual correct temperature values) are valid, or correct, or not. A trend line is simply a method that indicates movement.
What about polar amplification? Not many air planes there, but it is the most active geomagnetic storms (caused by solar activity) region.
You have to also take into account the fact that these emissions create a lot of vapor trails that block sunlight. These trails are visible in the photo that is part of the posting. I seem to recall a report saying that during the flight stoppages that occurred after the 9/11 terrorist attacks, the contrails disappeared and caused an increase in the amount of sunlight reaching the ground.
So, an extra dollop of super-GHG increases heat retention, but the haze it produces reduces the amount of heat that can be retained. Isn’t this called “feedback”?
Just sayin’.
If I remember correctly, when the planes were grounded the days got hotter and the nights got colder.
Yes. I just read a couple of those reports. Obviously, I am no climate scientist. :–))
Which would make sense. During the day, the clouds shield the ground from the sun, during the night their lack lets the ground see the 4K background of space. The effect is similar to that conjectured for cosmic radiation- induced clouds, the presence of which is modulated by the Sun’s magnetic field.
The exact climate change, then, depends on the difference between the daytime and nighttime effects.
http://www.atmos.washington.edu/~rennert/etc/courses/pcc587/ref/Travis-etal2002_Nature.pdf
This isn’t science; it is pure speculation. To be science it must have scary numbers. For example, if you calculate the amount of global warming caused by the COP21 air travel (expressed in units of Hiroshima atom bombs.), that would be science. If you project the effects of future COP meetings, with the number of attendees increasing at the prevailing rate from COP1 out to 2050, you should be able to show we are approaching a tipping point where 50% of the world’s population will be attending COP56 and dumping more water vapor in the high atmosphere than all of civilization up to 1970.
Then computer modelling studies will demonstrate that the heavier water-laden jet stream “might” descend to ground level and we “may” get 100-mph winds at the surface, which “could” devastate all the trailer camps set up for “informal permanent visitors of diverse linguistic origins” (soon to be the only acceptable term for what used to be called “illegal aliens”). And they “may” blow down all the windfarms we will be depending on for 50% of our electrical power.
Also you must acknowledge all contrary evidence. For example: every time Al Gore files some place in his private jet to promote global warming theory the local temperature drops, often quite significantly. Unless explained this would seem to contradict your theory.
Finally, to be science you must show this theory conforms to the consensus view. This is done by a carefully-controlled ideation survey only available on consensus websites that shows people who believe this theory have a very low correlation with people who believe the moon landing was a hoax, or that Kim Kardashian is a real person.
You “might” be onto something.
You would also need to say how many polar bears will die – that’s a very important thing!
That was one of the best bits of prose I’ve ever read on this site. Kudos!
It would be interesting to curtail all CO2 emissions and see how fast our invigorated biosphere reduces atmospheric CO2 from 400 ppm back to, say, 285 ppm, with a concurrent 15% drop in world-wide foodstuff production. I predict widespread starvation, so it wouldn’t be a good exercise at all.
9/11 contrails revisited! (e.g. http://www.bbc.co.uk/blogs/climatechange/2009/05/911_contrails_study_challenged.html )
Old news – see here:
https://www.researchgate.net/publication/11218772_Climatology_Contrails_reduce_daily_temperature_range
and
https://en.wikipedia.org/wiki/Contrail
There is at least one path to greatly reducing airplane water emissions. Airbus has taken an interest in LENR (Low Energy Nuclear Reactions) and has cosponsored one symposium on LENR research.
They’ve been filed a German for part of what they envision in 2013 for a LENR powered engine. https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=DE102013110249A1 says in a Google translation:
See http://www.e-catworld.com/2015/03/22/airbus-files-patent-for-lenr-power-generating-device/ for more.
More recently, Andreas Rossi has done some design work on such a beast, he’s taken more interest in it lately, see http://www.e-catworld.com/2015/12/21/rossi-now-far-less-skeptical-about-engine-applications-for-the-e-cat-working-again-on-jet-engine/
Take it all with a large grain of salt!
Rossi is a convicted con artist, whose claims for ECat conversion of hydrogen plus nickel into copper have been thoroughly debunked. Wrong isotopes in the samples he provided.
That said, both NASA and Airbus think LENR (weak rather than strong force) is real. Explained by Widom Larsen theory. Substanial experimental evidence from, among other places, US Navy. The question is whether it can be scaled to something useful. Third example in the recognition chapter of The Arts of Truth.
I was not aware that LENR produced anywhere near the temperatures needed for a direct air cycle aircraft engine (above 800°C). I haven’t been following LENR (seems like too much smoke & mirrors), but I don’t recall it has even been claimed to produce enough heat for super critical steam turbines (above 500°C).
Here’s one in a thermal runaway destructive test. The external shell is alumina. I don’t believe Industrial Heat (Rossi’s partner and mostly real company) has used a “hot cat” to make steam yet.
http://4.bp.blogspot.com/-XuKgtxpqL9U/UYQSyPJP-OI/AAAAAAAAJYI/96mRUBJjs1w/s1600/hot-cat.JPG
Ow, I’ve dropped the blamin thing on my foot.
How long before water vapor is classified by the EPA as a pollutant?
Here in California, I’m surprised it hasn’t already happened. Don’t tell Mary Nichols (head of the CA Air Resources Board)–CARB) that H2O is a greenhouse gas–she’ll tax/ban it. As an aside, I’ve subscribed to CARB’s emails re their activities. The degree of control they want over EVERYTHING is mind-boggling. Long past time to disband it (and/or limit its control to particulates–oh wait–then they’d try to tax/ban dust).
The old saying is, “The solution to pollution is dilution.” As such, real air, water, and soil pollutants such as mercury, lead, particulate carbon soot, cadmium, radium, radon(gas), arsenic, etc, there really is no “safe” level, just acceptable concentrations in various settings. Reducing any real pollutant to undetectable levels would be considered ideal in the abstract. But also very difficult in practice at reasonable costs in most settings. Thus the EPA sets minimum levels to be safe for humans, animals or plants
But If you ever find yourself confronted by someone who indeed believes CO2 is “carbon pollution”, just ask them, “What would the effect of reducing CO2 “pollution” concentration to near zero? Afterall, that is what is the goal with any real pollutant..”
If they say, “We need to eliminate just man’s release of CO2”, then ask them to please stop breathing.
I think it was espresso wot did it. All that steam…
http://tinyurl.com/gwotkxc
I blame Peter Gabriel: https://www.youtube.com/watch?v=Qt87bLX7m_o
Hey! that chair at 3:26 is Al Gore – isn’t it?
Paint all jets white!
Better yet….dye all of the water vapor coming out of them BLUE!!!
Isn’t a snag for this theory that total column water vapor plus specific and relative humidity have all fallen over the last few decades (except for specific humidity near the surface, about flat), i.e. the opposite of predictions by climate models?
http://www.climate4you.com/GreenhouseGasses.htm
This data is apparently challengable (isn’t everything in the climate domain). Yet it suggests that via air transport, industry, and all other human effects combined including CO2 emissions, we’re not likely to be making a major impact on water vapour (or a downswing through natural variability is absorbing this impact).
Thanks, I did look at this site and was able to make some estimates. The highest data band given is 3-6 km it has only 3-4 mm of water in that 3 km thick column. The area where planes fly is up about 10 km where there is probably even less water. I calculated the water production from jet fuel consumed (you get 234 g of water for every 150 g of fuel) and it is about 0.7 mm per year (over the earth surface). Also note the site warns us that the downward shift in data over time might be due to changes processing.
http://contrailscience.com/why-do-some-planes-leave-long-trails-but-others-dont/
Don, planes dont/can’t create comtrails without water!
Agreed. Some water vapour condenses quickly and we see it as conetails but maybe some remains as supercooled gas for a while at least – no idea. We’re also injecting an equal molar quantity of CO2 which persists.
Never mind the water vapour as a GHG, the actual solid water in contrails will have an albedo effect and will reduce night time radiation, and the image at the top shows that the albedo variation at least is huge.
Cloud we know reduces daytime temps but increases night time temps. What this means overall is something I dont have a handle on..
Its ironic that this was first mooted as a spoof theory, a few years back…but the actual curve match is startling..
http://www.clarewind.org.uk/events-1.php?event=39
I’m suprised that the greens haven’t been campaigning for aircraft to only fly at altitudes where the right amount of contrail is formed. Presumably they’re waiting until someone works out whether its impact would be positive or negative, one of those bits of unsettled settled science.
By the way, I think you meant wreak its vengeance not wreck.
Well if you fly ling haul at night, that’s a net temp rise, and if you fly by day, its a net temp fall., So a perfect climate control knob..except it takes a lot of fossil fuel to use it!
Contrails are more visually impressive, but not the only source. Burning natural gas produces two water molecules for every methane. Oxidation of hydrocarbons generally produces water molecules. I don’t know how long the water stays in gas phase, but there is increasing use of natural gas world-wide. Wouldn’t it be ironic if burning coal produces the least amount of greenhouse gas warming?
No one has mentioned the relative amount of man-made increase in humidity due to irrigation – from increasing water surface area behind dammed rivers, reservoirs – to channeling irrigation ditches to spread waters to fields – to large scale sprinkling systems, and bringing up the water from aquifers. How does this estimated amount compare to the increase in humidity due to the burning of all fossil fuels?
Ok, then what explains the warm period in the earlier part of the 1900s? AGW doesn’t explain it, this wouldn’t appear to either. Relevant imo because it is similar to the current warm period. Even if it is a factor I personally doubt we can quantify its effect fully until we better understand more of the factors driving climate, and if we cant explain semi recent eras we have decent data for such as the early 1900s we I expect have a long way to go in that regard.
Unless I missed it, where is the comparison for the amount of water vapor created by aviation to the total amount of water vapor in the entire atmosphere?
This article is junk science.
I could find correlation with CO2 rise and the appearance and growth of my ear hairs over the past 3 decades. But there is zero causal linkage.
Similarly, I could find correlation with the appearance of my gray hair and global warming since 1980. My gray hair seems to have reached a plateau in the past 10 years like temperatures. Again, it would be a junk correlation.
Concur
But in 20 years time all airliners will be battery/electric powered, so any water vapour created in the charging process will be emitted at ground level.
/sarc off
‘Wreak’ its vengeance, not ‘Wreck’ it.
Thank you, your right! I never really knew the difference