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Comments 601 to 650:

  1. CO2 effect is saturated

    Likeitwarm @638,

    While your "canard" is off-topic on this thread, a direct response to it is not.

    The 15 micron absorption band of CO2 is about 3 microns of the spectrum (roughly 13.5µm to 16.5µm). While this waveband does sit in the edge of the big H2O radiation 'window' which stretches from 6µm to 16.5µm (termed a 'window' as it allows incoming radation in from space) and thus CO2 narrows that 'window', this is not the essential part of the operation of CO2 as a greenhouse gas.

    The essential mechanism is that the CO2 greenhouse effect operates higher up in the atmosphere, above the bulk of of the atmospheric water vapour.  Thus it is CO2 which determines the altitude from which the IR in this band is emitted into space, thus the amount of this IR emitted into space (determined by the atmospheric temperature of the point of emission) and thus it is CO2 which determines the amount of greenhouse warming from this waveband.

  2. Taking the Temperature: a dispatch from the UK

    Some pertinent news from the BBC this morning (BST):

    https://www.bbc.co.uk/news/uk-62323048


    Weather forecasters faced unprecedented levels of trolling during this month's extreme heat in the UK, according to leading figures in the industry.

    The BBC's team received hundreds of abusive tweets or emails questioning their reports and telling them to "get a grip", as temperatures hit 40C.

    BBC meteorologist Matt Taylor said he had never experienced anything like it in nearly 25 years working in weather.

    The Royal Meteorological Society condemned the trolling.

    Most of the abuse seems to have been prompted as links were made between the heatwave and climate change.

    The UK saw record high temperatures on 19 July, with 40C exceeded for the first time. Dozens of locations saw temperatures above the previous UK record of 38.7C and 15 fire services declared a state of emergency because of a surge in blazes.

    The Met Office estimated the heatwave had been made 10 times more likely because of climate change.

    The BBC's Matt Taylor said: "It's a more abusive tone than I've ever received. I switched off a bit from it all as it became too depressing to read some of the responses."

    etc.




  3. The volcanic eruption in Alaska that rocked ancient Egypt

    The pivotal sentence is: "And in Egypt, the Nile failed to flood for several years in a row." Unfortunately it is not clear on what evidence this statement is based.

    Moderator Response:

    [PS] I believe the evidence is detailed in the peer reviewed paper referenced in the article

    https://www.nature.com/articles/s41467-017-00957-y

  4. Taking the Temperature: a dispatch from the UK

    Thanks for the heads up John.

    Ditto for the new record in Wales. The UKMO announcement:

    https://www.metoffice.gov.uk/about-us/press-office/news/weather-and-climate/2022/record-high-temperatures-verified

  5. Taking the Temperature: a dispatch from the UK

    You're welcome, Jim.

    I heard today that the Coningsby 40.3C reading has passed the UKMO ratification procedure, BTW.

  6. CO2 effect is saturated

    After much reading, it occurs to me that because H2O absorbs IR in such a wide array of wavelengths, including 15µm, and is so overwhelmingly prevalent being 95% of all "Greenhouse Gases", might it absorb almost all of the 15µm radiation available, leaving an insignificant amount to be absorbed directly by CO2 and other IR sensitive gases. Could this render CO2 just another molecule in the air and make it virtually impossible to measure any effect of CO2 related to atmospheric temperature making the "CO2 greenhouse effect" an unprovable theory? Isn't H2O the primary reason we have such a moderate climate?

    Moderator Response:

    This cannard is off-topic here. Please see the myth "Water vapour is the most powerful greenhouse gas". Read the article and if you have further doubts, please raise them there but only after studying the resources supplied.

    And see also https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010JD014287

     

  7. Taking the Temperature: a dispatch from the UK

    I hesitate to dip my toe in this evidently warm water, since things seem to have wandered a long way away from the recent UK heat wave!

    However having been blogging about the UKMO forecasts since July 10th I can report that here in North Cornwall outside temperatures peaked at a record 36 ºC in Bude and inside temperatures reached 32 ºC in my home office on the edge of Bodmin Moor.

    Here's a Carbon Brief explainer about those forecasts which may be of interest?

    https://www.carbonbrief.org/analysis-how-the-uks-insane-40c-heat-was-forecast-weeks-in-advance/

    The article quotes Dr. Simon Lee, who more recently has been taking the Express to task for misrepresenting his work. Believe it or not allegedly "Strange Pacific events to trigger MONTH of heatwaves as 40C hits"!

    https://twitter.com/SimonLeeWx/status/1552060364300455936

  8. 2nd law of thermodynamics contradicts greenhouse theory

    Note that the equation dF = 5.35 ln(C/Co), provided by GrindupBaker in comment 1515, is a simple approximation of radiative forcing due to changing CO2, based on more complex radiative transfer models. The original source is Myhre, 1998.

    More information is available on this SkS page:

    https://skepticalscience.com/empirical-evidence-for-co2-enhanced-greenhouse-effect-advanced.htm

     

  9. grindupBaker at 09:34 AM on 28 July 2022
    2nd law of thermodynamics contradicts greenhouse theory

    Frankamungus @1512 One interpretation of your question is that you simply want to see a formula such as:

    f = 5.35 * ln (CO2<now>/CO2<before>) w / m**2 for the heater of a CO2 increase in Earth's atmosphere from CO2<before> to CO2<now>.

    If so, that's the one on NASA Web site and I've vague recollections of seeing assertions of values other than the 5.35 over the years.

  10. michael sweet at 02:41 AM on 28 July 2022
    Taking the Temperature: a dispatch from the UK

    Fixitsan,

    In post 67 you say:

    "I made it5 clear in my first response that I was aware of a difference between local and regional and global terminologies"

    Then you refer to your claim that the sea level is not rising in the Maldives.  We are not talking about a single location when we discuss sea level rise, we are talking about Global Sea level Rise.  When you describe sea level rise at a single location and then claim that global sea level rise is not a problem it appears that you do not understand the difference between the Maldives and the entire world.

    Fortunately Tamino has done an article on Global Sea level Rise (that is the average sea level rise for the entire globe, not just the Maldives).

    sea level rise

    We see that the global sea level rise is about 200 mm from 1900 to 2020.   The current rate of Global sea level rise is 5 mm/yr.  From year 0 (zero) to year 2000 we know that sea level rise was about zero siince Roman ports on the Med sea are still usable (as are major ports all around the world).  If sea level rise was even 1 mm/yr that would have been 2 meters of sea level rise over a 2000 year period.

    I look forward to your link to a site that shows current Global Sea level rise is comparable to the rise from 0 to 2000 CE.

    I note that sea level rise is accelerating.  According to Tamino, before 2010 the sea level rise rate was less than 4 mm/yr.

    Where I live in Florida, Tamino shows that the current rate of sea level rise is 11 mm/yr.  That is "scarily high".  21 million people live in Florida.  Real estate in Florida near the ocean is increasing in value at a slower rate than inland since sunny day flooding is already a problem in most of the state near the ocean.

  11. 2nd law of thermodynamics contradicts greenhouse theory

    The comments in that Beer's Law post also provide a lot of relevant discussion, Frankamungus. I suggest that you post further questions on that thread, unless you have questions specifically related to the 2nd Law (this post).

  12. 2nd law of thermodynamics contradicts greenhouse theory

    Frankamungus:

    For the basics, you can read about the Beer-Lambert Law (atmospheric absorption of IR radiation) on this page:

    https://skepticalscience.com/from-email-bag-beer-lambert.html

    Relating this absorption to increasing temperature is not the result of a single equation. It involves a system of equations relating the complete energy balance. Comment #15 on that blog post includes references to two early papers that do the math in one dimension (vertical).

    Manabe and Strickler, 1964

    Manabe and Wetherald, 1967

  13. Frankamungus at 00:50 AM on 28 July 2022
    2nd law of thermodynamics contradicts greenhouse theory

    Can someone please share the math equation showing exactly how infrared radiation being trapped by CO2 is raising the temperature of the earth?

  14. Taking the Temperature: a dispatch from the UK

    Fixitsan @67 , your return to this forum will be most welcome, if you choose to come with some well-reasoned arguments.  Arguments which are scientific and Forth-right, rather than merely rhetorical.

    Meanwhile, may I commend for you the specialist blog: "WUWT".  That blog hosts a large number of denizens who delight in all sorts of motivated reasoning and deficiencies in self-awareness.   Quite entertaining, to see how the WattsUpWithThat-ites fail to grasp science and fail to look at the Elephant In The Room.   Indeed, a very recent article by a Mr Kip is chock-full of uninsightful wordiness. . . . about numbers   ;-)

     

    Moderator Response:

    [BL] Off-topic deleted.

  15. Taking the Temperature: a dispatch from the UK

    I made it5 clear in my first response that I was aware of a difference between local and regional and global terminologies

    I was accused of not being aware of those differences several times by what must be assumed to be people who had not read the first post I made on this topic.

    Which, is pretty frustrating, and further frustration is felt by other posters then sayying I did not accept a difference in those terms when clearly I had.

    Look at it from my point of view, it appears there is deliberate twisting and deliberate misunderstanding of what I wrote for what I assume are just personal humour reasons.

     

    You might as well have just said "Stupid denier" and be done with it.

     

    What is it about a lack of sea level rise which makes it so obectionable in a discussion about climate change ona  climate change website to make moderaters call it off topic.

    Until climate change came along sea level rise was just a normal fact of life, before it became something that has been given a new name as if it is a new phenomenon.

     

    I leave to play your games, I'm more than capable of a broad discussion and tolerate a lot of topic deviation because that is what happens during the turn of conversation in real life.

    You don't want to talk about a lack of sea level rise of a rate which is considered to be a worldwide threat, yet would allow to be published anything which claims sea level rise is not normal at all, and the current rate is scarily high compared to the past, when it isn't.

     

    Moderator Response:

    [BL] Accusations of dishonesty deleted. Derogatory attacks deleted.

    Off-topic and erroneous claims about sea level deleted.

    Please note that posting comments here at SkS is a privilege, not a right.  This privilege can be rescinded if the posting individual treats adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.

    Please take the time to review the policy and ensure future comments are in full compliance with it.  Thanks for your understanding and compliance in this matter.

  16. The FLICC-Poster - Downloads and Translations

    The FLICC-poster is now also available in Spanish where the acronym translates to FRESI.

  17. Taking the Temperature: a dispatch from the UK

    michael sweet @65,

    To make plain the Moderator comment, @3 the record high night-time temperature of +25.8ºC is a HadUK value set 19/7/22. The +18.9ºC for 19/7/22 in HadCET was the second highest HadCET night-time temperature with the record +19.5ºC being set 20/7/16. And as this all suggests, there have been more recent record high night-time CET temperatures than have survived from earlier decades.
    2003-22 - 104
    1983-02 - 62
    1963-82 - 33
    1943-62 - 55
    1923-42 - 50
    1903-22 - 26
    1878-02 - 23

  18. michael sweet at 07:54 AM on 27 July 2022
    Taking the Temperature: a dispatch from the UK

    John Masons' post @3 shows that the all time high low at night  was set during this heat wave. Everyone informed knows that nights are warming faster than days and that the warmth is statistically confirmed.  Fixitsan is just making things up.  

    Fixitsan:  provide a link that shows data that the low temperature at night is not increasing.

    Moderator Response:

    [BL] Should Fixitsan wish to restore any credibility, he should provide such an analysis. Since his most recent claim (#59) references CET, he should focus on that.

    For what it is worth, there are links in the comments to this blog post that will lead to the Met Office's daily CET data from 1878 to present.

    Spoiler alert: the daily minimum temperature from 1878 to today results in a linear trend of 0.78C per century. If you look at just the last 50 years, it is over 2C per century.

  19. Human CO2 is a tiny % of CO2 emissions

    As this is your first post, Skeptical Science respectfully reminds you to please follow our comments policy. Thank You!

  20. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    plicoin24:

    Air temperatures are strongly linked to ocean temperatures, so although they are more variable, they are useful. We also have air temperatures - especially over land - for much longer periods than we have good deep ocean data. As such, air temperature trends can be determined  much further into the past than ocean temperatures.

    Air temperatures are not "wrong", but it is correct to say that ocean data is better for global trends - if it is available. Climate science benefits from having both.

  21. Taking the Temperature: a dispatch from the UK

    Fixitsan @63,

    I fear you are getting carried away with all this. While not exactly representitive of "maximum low" records, the record for such CET values for 1st Jan was set 2022 and for 31st Dec 2021 and most maximum monthly low averages are also recent.

    CET RECORD HIGH NIGHT-TIME TEMP - Jan 1921, Feb 1903, Mar 1957, Apr 2011, May 1889, Jun 2017, Jul 2006, Aug 1997, Sep 2006, Oct 2001, Nov 1994, Dec 2015, Annual 2006

  22. Taking the Temperature: a dispatch from the UK

    John Mason

    No curiosity embedded in you at all then ?

    Maximum highs are rising

    Maximum lows are not

    Lets hope next years maximum temperature is a normal maximum low.

    The maximum highs might be hotter, but the maximum lows are not, adn there is no certainty that next year will be one of the maximum high year instead of a normal one

    Moderator Response:

    [BL] Repetition deleted.

    Please take the time to review the Comments Policy and ensure future comments are in full compliance with it.  Thanks for your understanding and compliance in this matter.

  23. Taking the Temperature: a dispatch from the UK

    This is all I need, plus the other answers above that patiently explain why the whole world is not warming at the sme pace. Data: NOAA.

  24. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    David-acct@2, as nigelj pointed out, the variation due to solar fluctuations is small. We are currently warming about 0.2C/decade. I think it is difficult for most people to realize just how rapid that really is. Nature gave us cycles which, for the most part, slowly vary, such as TSI. The anthropogenic warming is currently swamping all other natural warming/cooling cycles.

  25. Taking the Temperature: a dispatch from the UK

    In the same way that "the blob" south of Greeland does not. The Arctic is one of the fastest-warming places on Earth and the blob does not disquality that statement.

  26. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    Let us not forget that when we look at the graphs for global average surface temperature of the Earth vs. time, we are in some sense looking at the wrong graph if we want to know if the world is warming up. The fact that more than 90 % of the heat energy that the Earth accrues do the climate forcing supplied by greenhouse gases means that the lower atmosphere is much more subject to fluctuations in average temperature than than the ocean.

  27. Taking the Temperature: a dispatch from the UK

    John Mason

    How come the same temperature record you're discussing with me shows that Lowest maximums aren't rising like highest maximums are

    This suggests that global warming doesn't affect lower temepratures.

    Would you say that that makes sense ?

    Moderator Response:

    [BL} Repetition deleted.

  28. Taking the Temperature: a dispatch from the UK

    Why does the CET show that all mean low temperatures are not recent ?

    Surely warming would increase the average low temperatures too, or else we're only talking about increasing peak highs, which is not the same as a general warming trend

     

     

    Moderator Response:

    [BL] You are literally arguing with yourself. First, you use the term "all" with reference to a local/regional example, and then you clam that this relates to some characteristic of "a general warming trend".

    Your back and forth between local, regional, and global, and your repeated failure to be consistent in your interpretation, is turning your posts into incoherent rambling.

  29. Taking the Temperature: a dispatch from the UK

    Still flogging the same horse I see.....

    High temperature records being broken time and time again all over the world are very strong evidence for global warming and the role of greenhouse gases in that process is something we have known about since the 19th century. Sarcasm does not change the laws of physics!

  30. Taking the Temperature: a dispatch from the UK

    One Planet

    Thank you for explaining a short term datapoint is not indicitive of a long term trend

    Perhaps a reply from you to the original poster of the #1 message to that effect ought to be posted, as the poster has asserted that 40 degrees, once, for a brief period, is proof of global warming !

    Moderator Response:

    [BL] Bogus claim about what others have said deleted.

  31. Taking the Temperature: a dispatch from the UK

    BOB Loblaw

    rn

    " grossly-inaccurate characterization that rising CO2 must cause constantly rising temperatures,"

    rn

    Well for goodness sake Bob please tell Mr Mason above about this.

    rn

    He said if only I had told him before about the Forth Bridge story before then this group of international conributors could have done something about it

    rn

    Then why aren't you doing something about the rest of the articles in the media who portray global warming to mean that CO2 rises equal temperature rises.

    rn

    Please get on to them and stop them from incorrectly making a connection between CO2 and temperature....I mean fo CO2 doesn't cause the temperature rise than that's a different matter entirely but i don't think any undergradute who wrote in a report ' CO2 rises produce temperature rises' would be marked down for doing so.

    Moderator Response:

    [BL] Duplicate post contents deleted.

  32. Taking the Temperature: a dispatch from the UK

    BOB Loblaw

    " grossly-inaccurate characterization that rising CO2 must cause constantly rising temperatures,"

    Well for goodness sake Bob please tell Mr Mason above about this.

    He said if only I had told him before about the Forth Bridge story before then this group of international conributors could have done something about it

    Then why aren't you doing something about the rest of the articles in the media who portray global warming to mean that CO2 rises equal temperature rises.

    Please get on to them and stop them from incorrectly making a connection between CO2 and temperature....I mean fo CO2 doesn't cause the temperature rise than that's a different matter entirely but i don't think any undergradute who wrote in a report ' CO2 rises produce temperature rises' would be marked down for doing so.

    Moderator Response:

    [BL} Mr. Mason can speak and read for himself. You are playing games. This site is about the science, not the media. Off topic snipped (warning).

  33. Taking the Temperature: a dispatch from the UK

    MA Rodger

    ""you treat us to the bizarre idea that we should be able to use the house prices on the Maldives to measure AGW ""

    No that is your own disingenuity regarding the economic certainty that if the Maldives were about to be abandioned then nobody would live there, the house prices would therefore be zero.

    Is it actually true that you think an island on the brink of abandonment attracts serial investors and property sharks who pop up out of the water for no other purpose than tax avoidance ?

    Are you in a place where houses which will soon be abandined have excellent values ?

    We have lots of clifftop houses here which are worthless because they're about to fall into the sea due to longstanding coastal erosion, I just assumed nobody would be stupid enough to pretend to think a property on the brink of abandonment would hold any value in the proporty market, for the sake of trying to make a lousy point. But you did it !|

    I don't know if you would pay for a worthless property or not now. perhaps you actually would !

    But I think MOST investors, banks, economic deprtments of the Maldives, and even loan sharks would, quite sensibly steer people away from investing on things about to be washed into the sea.

    Conclusion - the properties are safe, or the world has gone mad

    Moderator Response:

    [BL} Off-topic rambling about economics deleted.

  34. Taking the Temperature: a dispatch from the UK

    Bob wrote

    ""And he returns to the CET temperature trend as if local variabilty disproves global trends.""

    Actually if you had comprehended what it is about that record which is curious it is int's INVARIABILITY, and not it's variability, which is distractive

    Moderator Response:

    [BL] Your continued inability to engage in constructive dialog, and your continued efforts to distort anything you read have forced me to step out of the discussion and enter a moderation role.

    "Variability" can be large or small. You are playing word games. Look at definition 2 on this page:

    https://en.wiktionary.org/wiki/variability

     

  35. Taking the Temperature: a dispatch from the UK

    Fixitsan @46

    "I wasn't talking about flat period of global temperatures mid last century, but instead a flat temperature in the UK from 1910 and proceding into the 1990s, which is 70% - 80% of the last century,...."

    Ok, but I was just trying to make the point there are almost certainly logical explanations for that long flat period. So for example the first link I posted discussed how different regions warm at different rates, -  and would also have different timing of the warming. I havent looked at mid Englands climate history and what factors have driven it, but there is bound to be some local or regional factor or combination of factors that explains the unusually long flat period of temperatures, despite rising CO2. And obviously a large part of that flat period is explained by sulphate aerosols (from about 1945 - 1980).

    I agree quoting that particular temperature record could get you labelled a denier. Not sure what the solution to that is other than to say I don't personally dwell on very local temperature records like that, because its incredibly obvious that in our complex climate system there will be a lot of local variation. I'm mostly just interested in the global average trend and whats happening where I live myself. Local variation doesnt bother me because anyone with more than half a brain knows that doesn't represent the global trend and there are dozens of plausible reasons consistent with an anthropogenic warming trend.

    And I agree the media sometimes exaggerate climate change. What can you do about that? I've complained to my local media for both exaggerating certain things, and and playing down other climate issues. It's the second problem thats a bit more concerning.

  36. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    David-acct @2

    Changes in solar irradiance produce a much smaller warming effect than the  anthropogenic greenhouse effect, so any solar heat energy thus sequestered in the oceans and later released, isn't going to be hugely significant. As follows:

    "The Sun's overall brightness varies on timescales from minutes to millennia, and these changes are detectable in the global temperature record."

    "During strong solar cycles, the Sun's total average brightness varies by up to 1 Watt per square meter; this variation affects global average temperature by 0.1 degrees Celsius or less. "

    "Changes in the Sun's overall brightness since the pre-industrial period have been minimal, likely contributing no more than 0.01 degrees Celsius to the roughly 1 degree of warming that's occurred over the Industrial period."

    "Projected warming due to increasing greenhouse gas levels in the coming decades will overpower even a very strong Grand Solar Minimum."

    "Rising amounts of atmospheric carbon dioxide have postponed the next Milankovitch-driven ice age by at least tens of thousands of years."

    www.climate.gov/news-features/understanding-climate/climate-change-incoming-sunlight

  37. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    Good point on the elevator graph. though it raises an interesting point coupled with the article a few weeks ago on the ocean time lag and the recent knowledge gained from the research associated with the ocean time lag and how it can take 20-40 years for the warming to manifest in the atmosphere.  

     

    Total solar irradiance has increased since the late 1800's, and remains higher today than it was in the late 1800's .  Granted TSI has dropped  somewhat since the mid 1900 (circa 1950/1960) yet still remains higher than the early 1900's .

    Scientists are just now getting a better understanding of the ocean time lag effect.  It merits additional research into how much of the warming over the last few decades relates to warming from tsi and the long delay in tsi effect manifesting in the atmospheric temps

    www.researchgate.net/figure/Shown-in-a-are-variations-in-the-total-solar-irradiance-arising-from-changes-in-solar_fig16_226227567

    https://data.giss.nasa.gov/modelforce/solar.irradiance/

    www.e-education.psu.edu/earth103/node/1004

    data.giss.nasa.gov/modelforce/solar.irradiance/

  38. SkS Analogy 7 - Christmas Dinner and the Faux Pause

    Good point on the elevator graph.  though it raises an interesting point coupled with the article a few weeks ago on the 

     

    https://skepticalscience.com/SkS_Analogy_04_Ocean_Time_Lag_2022.html

  39. One Planet Only Forever at 08:17 AM on 26 July 2022
    Taking the Temperature: a dispatch from the UK

    Fixitsan @42 (and other comments),

    Thank you for accepting that averaging larger amounts of data provides a clearer indication of long-term trends like the impacts of increasing CO2 levels. That understanding leads to awareness that the surface temperature impact of increased CO2 in the atmosphere is best seen by the trend of the global 30-year moving average (the global version of the one for CET presented on the Wikipedia page I linked to @40). Also, the 30-year ‘global average’ is understandably the better indication of the trend than any regional 30-year average.

    I have more to share regarding CO2 and temperatures. But the following will hopefully help explain the comments I will make.

    We appear to agreed that many people appear to be uninterested in putting the effort into pursuing the most logical explanations for the ever increasing evidence of what is going on. Learning requires a willingness to change your mind based on ‘new information and evidence’. It can require giving up on developed (status quo) beliefs and actions (no matter how popular, profitable or enjoyable they are).

    The following 6 minute BBC Reel item “The psychology behind conspiracy theories” is informative. Watch it. Think about it. Then watch it again. Then seriously consider the possibility that you are resisting learning for some reason(s).

    When there is a lot of evidence, as there is regarding climate science (especially since the first IPCC Report in 1990), the understanding still improves as additional evidence is obtained. But the fundamental understanding developed by 1990 is very unlikely to change ‘statistically significantly’ due to new evidence. And the observations you make regarding CET are not ‘new evidence’ (btw, Why is your focus on anything other than what the CET 30-year average trend since 1990 indicates?)

    Many other comments have been helpful (they really are), but I will only refer to a few of them.

    Bob Loblaw @47 provides a great overlay of the history of CO2 levels and global average surface temperature (GAST). But the 30-year moving average temperature line looks even more like the CO2 line.

    You can use the SkS Temperature Trend Calculator to see the 30-year GAST trend for the GISS v4 (the temperature dataset Bob Loblaw used). Choose GISTEMPv4 and set the follow: Start date = 1880; End date = 2023; Moving average = 360 months (30 years). The GISTempv4 30-year moving average increases between 1920 and 1950, and after 1965 (note that there is no ‘levelling off’ in a 600-month moving average). What is happening in the CET is similar. But local conditions can be understood, and expected, to vary relative to the global trend. The term ‘vary’ leads to the next points.

    Many variables affect the GAST. It isn’t just the CO2 levels. Increased CO2, primarily due to fossil fuel use, is known to be ‘the major factor’. However, additional variables affecting GAST are already well understood (with more being learned – because – well that’s science for you). They include:

    • Aerosols (see nigelj @45)
    • Other ghgs in the atmosphere, not just CO2
    • ENSO (el Nino, la Nina)
    • Solar radiation levels
    • Milankovitch (Orbital) Cycles

    In addition to variables affecting GAST, there are other factors affecting local climates including:

    • ENSO (it affects regional climates as well as being large enough to affect the GAST)
    • Atlantic meridional overturning circulation AMOC

    The AMOC is weakening due to Global Warming. That could mean cooler winters in the CET region even with increased Global Warming due primarily to increased CO2, due primarily to human activity (primarily fossil fuel use).

    So ... it is not wrong to say “Increased CO2 = increased GAST”. All that needs to be understood is that CO2 due to fossil fuel use is only the primary part of the 'increasing GAST and resulting Climate Change' problem.

    Closing with a brief bit about the future of the Maldives due to increasing GAST. Reviewing the Climate Central Map of “Land projected to be below annual flood level in 2050” (a detail you missed or misunderstood when commenting about bridges near Edinburgh) you can see that only ‘most of the Maldives’ will be expected to be annually flooded by 2050 (using the default settings). More of the Maldives would be annually submerged in subsequent decades. Mind you, with the default settings, even by 2100 there are still little bits of the Maldives above the annual flood level. A related understanding is that people playing marketplace games can make 'very bad bets'.

    A related understanding is that people playing marketplace games can make 'very bad bets', like investing in fossil fuelled pursuits, or buying in the Maldives (like the unfortunate people on Kona, the Big Island, Hawaii who chose to buy property and live in areas that are now under lava).

  40. Taking the Temperature: a dispatch from the UK

    For anyone wishing to examine a more formal version of climate myth bingo, there are a couple of web sites where such things have been more thoroughly formulated:

    https://andthentheresphysics.wordpress.com/2020/12/04/a-climateball-bingo-card/

    https://climateball.wordpress.com/the-bingo/

  41. Taking the Temperature: a dispatch from the UK

    Fixitsan @42-44&46,
    It seems SLR has gone Forth and we are now back amongst the sassenachs with their CET record.

    (Note you miss the point @43 where you respond to a caooment which is questioning why a discussion of CET should suddenly be discussing a strange article in the Edinburgh News abuot SLR projections.)

    @42&44 you forget that it is the global average SAT which will show some warming from a positive climate forcing resulting from increased CO2, and react with lots of warming from a big positive climate forcing like the CO2 forcing within AGW.
    But as you say up-thread (perhaps you have forgotten), the temperature record of a wider area provides a "better guide" than a smaller area. So @42 perhaps the question of what is causing these CET wobbles of the 1970s/80s (or any other period) may provide an exemplar for why a smaller area is more wobbly than a biggerer one. And @44 there appears to be some inane idea that global SAT (& thus also wobbly CET) should have been rising vigorously since that day Abraham Derby first thought to make his steel using coal rather than of charcoal.
    @46 you treat us to the bizarre idea that we should be able to use the house prices on the Maldives to measure AGW (with some inverse correlation) and because there is no indication of any falling prices to be seen, "the average person" will thus conclude the political message on AGW is yet more nonsense from the political classes.
    Yet in such a world, what "the average person" thinks or doesn't think makes no reference to the SLR records in the Maldives.
    Maldive SLR

  42. Taking the Temperature: a dispatch from the UK

    Oh, my. And while I was preparing comment #47, Fixitsan has posted #46, where again he fails to recognize that CET is not the UK, fails to realize that his eye-crometer view of trends is off (refer to the Tamino post I linked to earlier),  repeats his grossly-inaccurate characterization that  rising CO2 must cause constantly rising temperatures, fails again to actually look at when the CO2 rise is happening...

    ...and goes off on another tangent about sea level somewhere else in the world.

  43. Taking the Temperature: a dispatch from the UK

    ...and Fixitsan is back to his bogus argument that rising CO2 must create temperatures that are "always undoubtedly more warming"Is Global warming still happening? is #5 on the list of most common myths. Does CO2 always correlate with temperature? is #47 on the list of most common myths.

    And he's picked the cherry of the 1970s cooling. Why did climate cool in the mid-20th century? is #49 on the list of most common myths. Will he chase the squirrel of early 20th century temperatures next? That is #52 on the list of most common myths.

    And  he's justifying going off topic for this blog post ("Taking the temperature: A Dispatch from the UK") because he seems to be incapable of using the search function (top left of every page at Skeptical Science) to find a post where sea level rise is on topic. Oe perhaps he simply does not understand that the link between sea level rise and global temperatures is the result of the slow overall rise in global temperature, not the week of record-high temperatures in a small part of the world (the UK). Given his repeated failure to understand the global vs local relationships for temperature, it seems quite likely that he is equally-poorly-informed about the causes of sea level rise.

    And he returns to the CET temperature trend as if local variabilty disproves global trends. (He's still wrong.) And he goes into the pre-1900 period (part of the "Industrial Revolution") as an example, seemingly unaware that CO2 rise is largely a 20th century phenomenon - and mostly the latter half of that century.

    20th century CO2

     

    I need to correct an earlier misunderstanding on my part. Fixitsan is not playing "look, squirrel!". He's playing Climate Myth Bingo. Which square will he call out next?

  44. Taking the Temperature: a dispatch from the UK

    nigelj.No

    I wasn't talking about flat period of global temperatures mid last century, but instead a flat temperature in the UK from 1910 and proceding into the 1990s, which is 70% - 80% of the last century,which is a period of time I bet if you asked the layperson to describe in terms of temperature for that period almost certainly would argue that because CO2 has risen for that century then so too must have temperature. To even suggest to them that that had not been the case, even backed up by such a reliable and noteworthy source, is just bound to have you labelled a denier, despite being backed up by science in that case. Well, if it isn't the layperson who would say that, any of the 'journalist fact repeaters' and news cockatoos would definitely stick their oar in.

    To even get to that stage though suggests there is an enormous disconnect between what most people think and what is happening in reality. Science provides the data for reality and I assume the media in general make it their mission to sex up everything to do with climate change out of habit.

    I still wait every morning for the final calamatous news that the Maldives have finally become a victim to sea level rise, as I was assured by the Maldivian climate minister and international scientists should have happened by today that it was the only certain outcome if CO2 production did not decline. CO2 output has increased over those 30 years .

    Concerned about the properties of the people there I turn to Google and type 'Maldivian Properties risk' and get nothing but pages and pages of property sales pages reporting  increasing property prices due to a high demand in the The Maldives, representing a good risk for investment. How interesting it is to find presumably otherwise finance savvy investors throwing money out to be washed away with the at risk properties in the Maldives (sarc)

    You would think for an island constantly on the cusp of being destroyed it ought to be seeing falling property prices !

    The cost of living in The Maldives is 9.82% lower than in the UK

    Rent in The Maldives is 11.3% lower than in the UK on average

    Surprisingly expensive for somewhere about to disappear forever under water that will rise and engulf it, apparently, when it gets around to it, it's just busy not rising all that quickly at the moment and has not been for quite some time indeed.

    So did the Maldivian Environment minister and international scientists lie ? Perhaps they only made the most dire prediction possible and that hasn't come true. But in itself that makes it difficult to detect when any other prediction is a realistic one or if that's also the most dire possible prediction. Under these circumstances who can blame the average person for feeling like it is just business as usual where politicians are concerned, always amplifying negatives and generating high levels of irrational fear, but conveniently always leaving office before they have to be held accountable for being wrong. Again. Business as usual.

  45. Taking the Temperature: a dispatch from the UK

    The reason different parts of the world warm at different rates is discussed here.

    www.climate.gov/news-features/climate-qa/does-global-warming-mean-it%E2%80%99s-warming-everywhere#:~:text=No%2C%20%E2%80%9Cglobal%20warming%E2%80%9D%20means,all%20seasons%20across%20the%20globe.

    The reason there was a flat period of global temperatures mid last century in the centre of England and for the planet as a whole was because industrial sulphate aerosols suppressed the warming caused by CO2. This effect ended around the 1980's as CO2 concentrations became large enough to overcome the effects of aerosols, and the quantities of aerosols dinished as coal fired power stations fitted equipment to filter much of them out. I believe this was to reduce acid rain effects and their affects on respiration.

    This material is mostly intuitively obvious and takes only seconds to find on the internet. Why people can't find it is beyond me.

  46. Taking the Temperature: a dispatch from the UK

    Regarding the CET it seems to show no net gain in temeprature between about 1760 and 1910. An amazing sight to see, shoudl I be ever tempted to read news headlines which assert that temperatures have been rising continuously throughtout the industrial revolution. Not in Central England, they haven't.

    Of course it depends if you use the 10 year or 30 year average but short term trending allows more noise through but regardless of that, warming only seemed to being in 1910 on the CET terecord,  reached temperatures as high as those seen in 1730 by about 1940 (it remained  colder than 1730 until 1940) and since 1940 we have seen a discontinuous warming, which incudes a cooling starting in the 1960's which doesn't finish cooling until the 1990's

    With a lack of variability in atmospheric CO2 levels over that 100 or so year period (the change in CO2 has been steady and predictable, rarely variable) being coincident with the CET record during that time, it's visible to see that the theory of more CO2 = more warming is not being measured by instrumentation in the last 100 or so years. That is not to say that CO2 does not cause warming, but the CET record doesn't show what I believe many epople might understand is happening in their own minds when picturing the promoted relationship between CO2 and temperature on it's own

     

     

     

     

  47. Taking the Temperature: a dispatch from the UK

    @ Bob ""I'm not sure exactly what sea level rise has to do with temperature records""

     

    No, perhaps reading any press article which consistently ties the two together ought to be all you need to do to raise your awareness.

     

    Say 'climate change' on any high street, hear ' sea level rise' addended

     

    Perhaps though you weren't aware of any previous connection between temperature and sea level ? Have you heard of a thing called climate change thepory ? Perhaps ? Maybe ? Oh well, hideaway.

  48. Taking the Temperature: a dispatch from the UK

    One Planet, with reference to your own referenced series extracted from CET

    Why was there a cooling starting at around 1972, with temperatures not recovering tot heir pre 1970's level until the 1990's if CO2, the alleged cause of all warming, was rising throughout the same period ?

    The theory is more CO2 = always undoubtedly more warming.

  49. Taking the Temperature: a dispatch from the UK

    A nice statistical analysis of this UK heat wave, including references to CET, over at Tamino's:

    tamino.wordpress.com/2022/07/23/extra-ordinary-heat-wave/

  50. One Planet Only Forever at 02:49 AM on 25 July 2022
    Taking the Temperature: a dispatch from the UK

    One more (last) poke at how hard it is to misunderstand what the HadCET dataset shows:

    • The following webpage "Met Office Hadley Centre observations datasets: HadCET", is the page linking to downloads of the dataset. The dominant feature on that page is a graphic presentation of each year's 'Mean Temperature difference from 1961-1990 average'. What it shows is hard to misunderstand.
    • The Wikipedia page for Central England Temperature has a section called "Trends revealed by the series" includes a graph of the 10-year and 30-year moving averages. That shows that prior to 1950 there was only a brief period (around 1735) when the 30-year average was close to being as warm as the coolest values since 1950. And since 1990 the 30-year average has consistently 'statistically significantly' increased. It also shows that the current 10-year averages are warmer than any 10-year averages before 1990. And it also shows that the annual data points cover a broader range than the 10-year average, which has a broader range of values than the 30-year average. That should lead to understanding that the monthly values would have a larger range than annual values, with daily values having an even larger range of values.

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