At a glance - Evidence for global warming

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On February 14, 2023 we announced our Rebuttal Update Project. This included an ask for feedback about the added "At a glance" section in the updated basic rebuttal versions. This weekly blog post series highlights this new section of one of the updated basic rebuttal versions and serves as a "bump" for our ask. This week features "Evidence for global warming". More will follow in the upcoming weeks. Please follow the Further Reading link at the bottom to read the full rebuttal and to join the discussion in the comment thread there.

Fact-Myth Warming

At a glance

It's now 14 years since Sarah Palin was on the record as having provided the above quote, at a logging conference in California. In that time, much has happened in the world of climate change. We can have a quick catch-up, by examining the 2022 State of the Climate report, published in the Bulletin of the American Meteorological Society in 2023.

In 2022, the carbon dioxide concentration in the atmosphere rose to 417 ppm. That's 50% greater than the pre-industrial level. Global mean methane abundance was 165% higher than its pre-industrial level, Nitrous oxide was 24% higher.

Record or near-record heat was widespread in 2022 and even more so in 2023. In 2022, Europe observed its second-warmest year on record, with sixteen individual countries observing record warmth at the national scale. Records tumbled, many with huge increases as summer heatwaves plagued the region. On 18 July, 104 weather-stations in France broke their all-time temperature records in a single day. On the 19th, England recorded a temperature of 40°C for the first time. China experienced its second-warmest year and warmest summer on record. In the Southern Hemisphere, the average temperature across New Zealand reached a record high for the second year in a row. Western Australia reached 50.7°C on 13 January, equaling Australia's highest temperature on record.

Sea-surface temperature patterns in the tropical Pacific were characteristic of La Niña, a phenomenon that should have mitigated against atmospheric heat gain at the global scale. However, the annual global surface temperature across land and oceans was among the six highest in records dating as far back as the mid-1800s. 2022 was the warmest La Niña year on record.

At the time of writing, there is still about a month of 2023 to run. Yet once again we have record-breaking temperatures, with some records smashed by huge margins, so that 2023 looks as though it may well go down as the hottest on record.

'Snake oil science'? No, these are records of things actually happening, right now. Not only are they being recorded, they are being witnessed by countless people worldwide. They add to the growing mountain of scientific evidence, showing without any doubt that Earth's climate system is overheating, as predicted by the laws of physics from more than a century ago. If some politician or other insists to the contrary, just ask yourself what particular expertise entitles them to make such utterances? Are they really smarter than all the tens of thousands of scientists who work hard to collect and analyse the data?

Beware. politicians tend to be good at talking politics on most topics and they are especially adept at telling people what they want to hear. But in cases like this, we can clearly see that events have a tendency to catch up with them in the longer term. Beware.

Please use& this form to provide feedback about this new "At a glance" section. Read a more technical version below or dig deeper via the tabs above!


Click for Further details

In case you'd like to explore more of our recently updated rebuttals, here are the links to all of them:

Myths with link to rebuttal Short URLs
Ice age predicted in the 1970s sks.to/1970s
It hasn't warmed since 1998 sks.to/1998
Antarctica is gaining ice sks.to/antarctica
CRU emails suggest conspiracy sks.to/climategate
What evidence is there for the hockey stick sks.to/hockey
CO2 lags temperature sks.to/lag
Climate's changed before sks.to/past
It's the sun sks.to/sun
Temperature records are unreliable sks.to/temp
The greenhouse effect and the 2nd law of thermodynamics sks.to/thermo
We're heading into an ice age sks.to/iceage
Positives and negatives of global warming sks.to/impacts
Global cooling - Is global warming still happening? sks.to/cooling
How reliable are climate models? sks.to/model
Can animals and plants adapt to global warming? sks.to/species
What's the link between cosmic rays and climate change? sks.to/cosmic
Is Al Gore's An Inconvenient Truth accurate? sks.to/gore
Are glaciers growing or retreating? sks.to/glacier
Ocean acidification: global warming's evil twin sks.to/acid
The human fingerprint in global warming sks.to/agw
Empirical evidence that humans are causing global warming sks.to/evidence
How do we know more CO2 is causing warming? sks.to/greenhouse
Explaining how the water vapor greenhouse effect works sks.to/vapor
The tricks employed by the flawed OISM Petition Project to cast doubt on the scientific consensus on climate change sks.to/OISM
Is extreme weather caused by global warming? sks.to/extreme
How substances in trace amounts can cause large effects sks.to/trace
How much is sea level rising? sks.to/sealevel
Is CO2 a pollutant? sks.to/pollutant
Does cold weather disprove global warming? sks.to/cold
Do volcanoes emit more CO2 than humans? sks.to/volcano
How do human CO2 emissions compare to natural CO2 emissions? sks.to/co2
Climate scientists could make more money in other careers sks.to/money
How reliable are CO2 measurements? sks.to/co2data
Do high levels of CO2 in the past contradict the warming effect of CO2? sks.to/pastco2
What is the net feedback of clouds? sks.to/cloud
Global warming vs climate change sks.to/name
Is Mars warming? sks.to/mars
How the IPCC is more likely to underestimate the climate response sks.to/underestimat
How sensitive is our climate? sks.to/sensitivity
Evidence for global warming sks.to/warming

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