Too late to save the climate?

by Andrew Glikson

“Without major action to reduce emissions, global temperature is on track to rise 

by 2.5°C to 4.5°C by 2100” (NASA 2023)

“We Will Not Sign Our Own Death Warrant” (a delegate at COP28)

Whether anything can be done by humans to arrest or reverse global warming and its consequences for the habitability of planet Earth remains an open question, for which neither climate science nor the ignorant hordes of politicians and economists, oblivious to the basic laws of physics, have the answer. However, it is likely that over the next centuries or longer the flow of cold water from the melting of the Greenland and Antarctica ice sheets will lead to a transient slowdown of the rate of warming before the large ice sheets are exhausted.

---

Having ignored climate science, dismissed climate scientists and repeatedly confected untruths, while global heating accelerates with deleterious consequences, Homo “sapiens” finds itself on track toward carbon poisoning of the atmosphere, the lungs of the inhabitable Earth, acidification of the hydrosphere and coating of the land with carbon and plastics.

In a new paper, a group of leading climate scientists (Hansen et al., 2023) indicates mean global temperature is currently accelerating toward 2.0°C above pre-industrial temperature by the middle of the decade (Figure 1). The Arctic is warming nearly four times faster than the rest of the world over the last 43 years, on average around 3℃ warmer than it was in 1980. Over the past 30 years Antarctica has been one of the fastest-changing places on Earth, warming more than 3 times faster than the rest of the world.

[ Figure. 1. Global temperature relative to 1880-1920 based on the GISS
(Goddard Institute of Space Studies) analysis - by James Hansen et al., 2023. ]

As the polar regions warm, the tropical climate zones expand and the mid-latitudes, where the most fertile soils are and where the bulk of the population lives, are contracting.

Thus (Figure 2.):

• Agro-climate zones in eastern Europe experienced a northward migration velocity of 100 km per 10 years over the past 40 years.
• Northward migration of climate zones in Europe may be up to two times faster in the next decades.
• Negative impacts of heat stress are expected to non-linearly increase in large parts of southern and southeastern Europe.

[ Figure 2. (a) Agro-climate zonation of Europe based on growing season length (GSL) and active temperature sum (ATS) for the period between 1975 and 1995.The identified agro-climate zones are named as follows (going from north to south): boreal north (BON), boreal south (BOS), nemoral (NEM), continental (CON), Pannonian (PAN), northern maritime (NMA), southern maritime (SMA) and Mediterranean (MED). (b) The migration of agro-climate zones between the 1975–1995 and 1996–2016 periods. For better distinction, only the areas affected by migration of agro-climate zones are displayed (colored areas), while gray color denotes the areas where the agro-climate zones have not changed - Ceglar et al. 2019. ]

A projection by NOAA states: “While we cannot stop global warming overnight, we can slow the rate and limit the amount of global warming by reducing human emissions of heat-trapping gases and soot (“black carbon”). This projection takes neither the amplifying feedback, i.e. from warming of the oceans, melting ice sheets, melting of the permafrost, migrating climate zones, nor the time factor into account.

Factors rendering a potential reversal of global warming in the short term unlikely include:

1. The rise of mean global heating above a level of ~1.5^oC and much higher at the poles above pre-industrial temperatures, polar-ward migration of climate zones, melting of the Greenland and Antarctic ice sheets, intensification of extreme weather events, requiring major cooling of the Earth, which is unlikely within the time frame of a tribal-conflicted civilization.
   
   
2. Where scientific breakthroughs would allow effective climate mitigation, for example global cooling by CO₂ drawdown, it is questionable whether Homo sapiens ─ recorded by history as an invasive blood-stained tribal species ─ would be able to avoid destroying its home planet.

The apparent absence of radio signals from technological civilizations in the Milky Way may suggest that advanced civilizations tend to undergo self-destruction, consistent with local observations, referred to as the “Fermi Paradox”.

A factor rarely taken into account emerges from the key paper “Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modelling, and modern observations that 2°C global warming could be dangerous”, by Hansen et al. (1996) (Figure 3.).

[ Figure 3. Surface air temperature (°C) relative to 1880-1920 for several scenarios - by James Hansen et al. 2016. ]

Here the flow of cold ice-melt water results in formation of large cold pools in the Atlantic Ocean and Southern Ocean (Figure 3), related to an overall decline in mean global temperatures to -0.33°C by 2096 (Figure 4.) due to the flow of cold ice-melt  water from Greenland and Antarctica.

While the collision between the cold air and water fronts and the tropical war air mass would lead to intense storms over large tracts of Earth, such transient cooling may allow Home "sapiens" a respite from global warming before its home becomes an uninhabitable planet.

[ Figure 4. Surface air temperature (◦C) relative to 1880–1920 in (a) 2065, (b) 2080, and (c) 2096. Top row is IPCC scenario A1B. Ice melt with 10-year doubling is added in other scenarios - James Hansen et al. 2016. ]

A/Prof. Andrew Y Glikson
Earth and Paleo-climate scientist

Andrew Glikson

Books:

The Asteroid Impact Connection of Planetary Evolution
https://www.springer.com/gp/book/9789400763272
The Archaean: Geological and Geochemical Windows into the Early Earth
https://www.springer.com/gp/book/9783319079073
The Plutocene: Blueprints for a Post-Anthropocene Greenhouse Earth
https://www.springer.com/gp/book/9783319572369
The Event Horizon: Homo Prometheus and the Climate Catastrophe
https://www.springer.com/gp/book/9783030547332
Climate, Fire and Human Evolution: The Deep Time Dimensions of the Anthropocene
https://www.springer.com/gp/book/9783319225111
Evolution of the Atmosphere, Fire and the Anthropocene Climate Event Horizon
https://www.springer.com/gp/book/9789400773318
From Stars to Brains: Milestones in the Planetary Evolution of Life and Intelligence
https://www.springer.com/us/book/9783030106027
Asteroids Impacts, Crustal Evolution and Related Mineral Systems with Special Reference to Australia
https://www.springer.com/us/book/9783319745442
The Fatal Species: From Warlike Primates to Planetary Mass Extinction
https://www.springer.com/gp/book/9783030754679
The Trials of Gaia. Milestones in the evolution of Earth with reference to the Antropocene
https://www.amazon.com.au/Trials-Gaia-Milestones-Evolution-Anthropocene/dp/3031237080

Double Blue Ocean Event 2024?

A double Blue Ocean Event could occur in 2024. Both Antarctic sea ice and Arctic sea ice could virtually disappear in 2024. A Blue Ocean Event (BOE) occurs when sea ice extent falls to 1 million km² or less, which could occur early 2024 for Antarctic sea ice and in Summer 2024 in the Northern Hemisphere for Arctic sea ice.

Antarctic sea ice loss

The situation regarding Antarctic sea ice extent is pictured in the image below, which shows that on December 12, 2023, Antarctic sea ice extent was 9.499 million km², a record low for the time of year.

[ image adapted from NSIDC ]

Antarctic sea ice extent was 1.788 million km² on February 21, 2023. Antarctic sea ice extent may well be much lower in February 2024, with sea ice loss fuelled by several self-reinforcing feedback loops, as discussed in an earlier post.

Arctic sea ice loss

The situation regarding Arctic sea ice extent is pictured in the image below.

[ image adapted from NSIDC ]

The above image shows that on December 12, 2023, Arctic sea ice extent was 9.499 million km², third lowest low for the time of year, behind 2016 and 2020.

Temperature November 2023



The above image shows the November 2023 temperature anomaly compared to a 1951-1980 base. The image below also shows the November 2023 temperature anomaly, but it is not compared to a 1951-1980 base (NASA's default), it is instead compared to a 1900-1923 base.

Of course, the temperature anomaly will be much higher when compared to pre-industrial. Further adjustments are required, because the NASA data are for sea surface temperatures (rather than temperatures of the air 2 meters above the sea surface). Also note the grey areas on the above map, signifying that no data are available for earlier years. This especially affects the Arctic, where the anomalies are highest, so disregarding these data is not appropriate. In the image below, data are adjusted by 0.99°C to reflect all this, as discussed at the pre-industrial page.

[ click on images to enlarge ]

The above image is created with NASA Land+Ocean monthly mean global temperature anomalies vs 1900-1923, adjusted by 0.99°C to reflect ocean air temperature, higher polar anomalies and a pre-industrial base. Blue: Polynomial trend based on Jan.1880-Nov. 2023 data. Magenta: Polynomial trend based on Jan. 2010-Nov. 2023 data.

The above images illustrate that temperatures are rising strongly in the Arctic, which gives a dire warning that a Blue Ocean Event could occur in Summer 2024 in the Northern Hemisphere that could further speed up global temperatures, as illustrated by the magenta-colored trend in the above image.

The situation is dire

Temperature anomalies in the Northern Hemisphere were more than 2°C above 1951-1980 recently (2.024°C in October 2023 and 2.058 in November 2023), as illustrated by the above image. Note that anomalies on the image are calculated from 1951-1980 and that anomalies from pre-industrial are higher.

Land-only temperature anomalies can be much higher than land+ocean anomalies, since oceans act as a buffer. It is therefore most important to look at the land-only temperature anomaly in the Northern Hemisphere, since that is where the highest anomalies occur, at the very places where most people live. Furthermore, as temperatures keep rising, more extreme weather events occur, with an increase in intensity, frequency, duration and area covered by such events. The urban heat island effect can further add to the rising high temperature peaks reached in cities.

The precautionary principle urges the world to closely watch peak hourly local wet-bulb globe temperatures, rather than to hide the full wrath of the temperature rise by focusing on global temperature anomalies that are compared to recent base periods and that are averaged over periods going back ten years or longer. 

Temperatures are rising most rapidly in the Arctic, which contributes to the occurrence of more extreme weather events. Low temperatures in Winter in the Arctic are essential to build up ice thickness to preserve sea ice as the melting season starts.

[ Climatology temperatures are 1979-2000 averages and anomalies are calculated
from 1979-2000 averages. Black line: 2023. Orange line: 2022. Grey line: 2016. ]

Arctic temperature hit a record high for the time of year on December 15, 2023, and an anomaly of 5°C, as the above image shows. Arctic anomalies are the highest in the world, as illustrated by the record 8.3°C anomaly that was reached on November 18, 2016. Since the chance that the current El Niño will slow down soon is minimal, Arctic anomalies could reach even higher records in the next few months.

On December 12, 2023, as said, Arctic sea ice extent was third lowest for the time of year, i.e. only 2016 and 2020 were lower. The years 2016 and 2020 had the highest annual temperature (a tie) on record and this annual temperature record is likely to be surpassed in 2023, while 2024 may be even worse, as the chance that the current El Niño will slow down soon is minimal.

[ Water Vapor tipping point ]

In the video below, Anton Petrov discusses the runaway greenhouse effect. 

This is important, as a very small increase in solar irradiation – leading to an increase of the global Earth temperature, of only a few tens of degrees – would be enough to trigger an irreversible runaway process on Earth and make our planet as inhospitable as Venus, a recent study concludes, as discussed at this post.

A temperature rise of more than 10°C could unfold as early as by end 2026, due to contributions of gases (including water vapor), aerosols, albedo changes and further elements, in the process causing the clouds tipping point to get crossed, which could add a further 8°C to the rise.

This rise could in turn cause the water vapor tipping point to be crossed. The rise in water vapor alone could from then on suffice to push temperatures up further, in a runaway greenhouse process in which evaporation causes a global surface temperature rise of several hundred degrees Celsius. 

Arctic sea ice could have been even lower in extent, had the Atlantic meridional overturning circulation (AMOC) not been slowing down. As a result of AMOC's slowing down, less ocean heat is reaching the Arctic Ocean. Instead, a huge amount of ocean heat has been accumulating in the North Atlantic and much of this heat could soon be pushed abruptly into the Arctic Ocean as storms temporarily speed up currents that carry ocean heat into the Arctic Ocean.

Arctic sea ice volume is getting very low, as illustrated by the image on the right, adapted from dmi.dk. 

Meanwhile, Earth's radiation imbalance is very high, emissions are high and rising, and politicians refuse to act responsibly, all contributing to further deterioration of the situation, with the danger that ocean heat will reach and destabilize methane hydrates that are contained in sediments at the seafloor of oceans, resulting in massive methane eruptions, further pushing up global temperatures, as discussed in many earlier posts such as this one and this one. 

As more people become aware of the dire situation, widespread panic may set in, as this 2007 post warned about. People may stop showing up for work, resulting in a rapid loss of the aerosol masking effect, as industries that now co-emit cooling aerosols (such as sulfates) grind to a halt. Many people may start to collect and burn more wood, resulting in an increase in emissions that speed up the temperature rise. As temperatures rise, more fires could also break out in forests, peatlands and urban areas including landfills and waste dumps, further contributing to emissions that speed up the temperature rise.

Ominously, the highest methane levels on record (surface flasks) were recently reached at Barrow, Alaska, U.S., as illustrated by the image below.

Climate Emergency Declaration

The situation is dire and the precautionary principle calls for rapid, comprehensive and effective action to reduce the damage and to improve the situation, as described in this 2022 post, where needed in combination with a Climate Emergency Declaration, as discussed at this group. 

Links

• NSIDC - Interactive sea ice chart
https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph

• NOAA - December 2023 El Niño update
https://www.climate.gov/news-features/blogs/enso/december-2023-el-nino-update-adventure

• Climate Reanalyzer - November 2023 temperature anomaly
https://climatereanalyzer.org/research_tools/monthly_maps

• Climate Reanalyzer - Monthly reanalysis time series
https://climatereanalyzer.org/research_tools/monthly_tseries

• Climate Reanalyzer - Daily surface air temperature, Arctic
https://climatereanalyzer.org/clim/t2_daily/?dm_id=arctic

• NASA - maps
https://data.giss.nasa.gov/gistemp/maps

• NASA - custom plots
https://data.giss.nasa.gov/gistemp/graphs_v4/customize.html

• First exploration of the runaway greenhouse transition with a 3D General Circulation Model - by Guillaume Chaverot et al.
https://www.aanda.org/articles/aa/full_html/2023/12/aa46936-23/aa46936-23.html

Also discussed at:
https://www.facebook.com/groups/arcticnews/posts/10161182685569679

• Polar Portal - Arctic sea ice thickness and volume
http://polarportal.dk/en/sea-ice-and-icebergs/sea-ice-thickness-and-volume

• NOAA - Global Monitoring Laboratory - Barrow, Alaska

https://gml.noaa.gov/dv/iadv/graph.php?code=BRW&program=ccgg&type=ts

• Pre-industrial
https://arctic-news.blogspot.com/p/pre-industrial.html

• Will temperatures keep rising fast?
https://arctic-news.blogspot.com/2023/12/will-temperatures-keep-rising-fast.html

• Will temperatures keep rising fast?
https://arctic-news.blogspot.com/2023/12/will-temperatures-keep-rising-fast.html

• Wet Bulb Globe Temperature Tipping Point
https://arctic-news.blogspot.com/2023/07/wet-bulb-globe-temperature-tipping-point.html

• Transforming Society

https://arctic-news.blogspot.com/2022/10/transforming-society.html

• Climate Plan
https://arctic-news.blogspot.com/p/climateplan.html

• Climate Emergency Declaration
https://arctic-news.blogspot.com/p/climate-emergency-declaration.html

Climate change terror

The Dubai’s COP-out denial conference

- by Andrew Glikson -

The issue, betrayed, is nothing more and nothing less than the future of a multitude of species on Earth, including Homo sapiens.

Global temperature (relative to 1880-1920 mean for each month) for the 1997-98, 2015-16 and 2023-24
El Ninos. The impact of El Nino on global temperature usually peaks early in the year (El Nino Peak
Year) following the year in which the El Nino originated. Credit: James Hansen et al. (Oct. 2023)
Figure 1. Comparative El-Nino trends 1997, 1998, 2015, 2016, 2023 relative to 1880-1920.

As confirmed by the acceleration of climate extremes, consistent with the prediction by Wallace Broecker, the authoritative climate scientist, global climate change is racing beyond tipping points (Figure 1), yet the evidence continues to be denied, including in the recent COP-28 climate conference, where climate scientists are almost nowhere to be seen.

Figure 2a. Based on NOAA’s temperature data Earth’s temperature rose by an average of 0.08° C per decade since 1880; Since 1981 the warming rate is 0.18° C per decade. The 2022 surface temperature was 0.86 °C warmer than the 20th-century average of 13.9 °C and 1.06 ˚C warmer than the pre-industrial period (1880-1900). The 10 warmest years in the historical record have all occurred since 2010.

As temperatures rise (Figure 2a), fires engulf large tracts of land, storms intensity and sea levels rise (Figure 2b), the living Earth is entering a critical stage. Having ignored the existential threat of climate change, extreme nationalism and fascism ─ the ideology of death ─ spill rivers of blood in many parts of the world.

Figure 2b. Accelerated sea level rise after Church and White, 2011 and University of Hawaii (Fast Delivery). Values in millimetres compared to the 1993-2008 average. NOAA. University of Hawaii Sea Level Centre

While the powers that be ─ politicians, CEOs, top-bureaucrats, economists and their media mouthpieces ─ proceed to propagate dangerous lies, such as the denial of climate change at the heart of the Dubai COP-28 conference.

A principal lie is that, in itself, the application of clean technologies ─ solar, wind, tide, hydrogen, may be sufficient to arrest global warming. Likewise, ignoring the export of fossil fuels in national carbon inventories, despite the dissemination of greenhouse gas emissions world-wide.

Major climate untruths propagated by governments, fossil fuel corporations and their subservient media include proposed limits on domestic emissions which are meaningless to the arrest of global warming since with continuing mining, export and combustion of fossil fuels, greenhouse gases disperse through the atmosphere regardless of where the fossil fuel is mined or burnt.

With CO₂ level reaching 418.51 ppm at a rate of ~2.5 ppm/year and methane CH₄ level reaching 1917.1 ppb at a rate of near-12 ppb per year, greenhouse gas rises are exceeding any in recent geological history, representing the most severe atmospheric crisis since the asteroid impact which killed the dinosaurs 66 million years ago. Oblivious to the physical laws on which climate science is based and to the time factor of the impending climate crisis, setting artificial targets such as “1.5°C by 2030” or “2°C by 2050”, the powers-to-be may not be aware of what life on planet Earth is facing.

Australia is the world’s third biggest exporter and fifth biggest miner of fossil fuels by CO₂ potential. hydrocarbon exports, following Russia and Saudi Arabia. “The government denies responsibility for emissions created by the vast amounts of coal and gas Australia exports overseas as one of the world’s largest fossil fuel producers, and has flatly ruled out any discussion on banning new fossil fuel projects” (McNeill, 2022).

While ongoing combustion of fossil fuels is raising greenhouse gas concentration at a rate unprecedented in the geological record, global heating being a self-amplifying process, the utilization of clean energy: solar, wind, hydropower and thermal power cannot by itself stem global warming, now rising above 420 ppm CO₂, well above the 180-280 ppm range of the preceding glacial-interglacial cycles. Such a high CO₂ level compared to that which existed in the Miocene before 5.3 million years ago when mean global temperature was about ~18.4°C, rising at a rate to which much of the fauna and flora can hardly adjust.

Nowadays as bombs keep falling, heads of governments jet around the world genuflecting to each other, signing arms deals, uttering honey words, while the corporate media discusses their official dinner menus, no solutions are reached for the worsening humanitarian crises nor the future on an uninhabitable Earth.

A/Prof. Andrew Y Glikson
Earth and Paleo-climate scientist

Andrew Glikson

Books:
The Asteroid Impact Connection of Planetary Evolution
https://www.springer.com/gp/book/9789400763272
The Archaean: Geological and Geochemical Windows into the Early Earth
https://www.springer.com/gp/book/9783319079073
The Plutocene: Blueprints for a Post-Anthropocene Greenhouse Earth
https://www.springer.com/gp/book/9783319572369
The Event Horizon: Homo Prometheus and the Climate Catastrophe
https://www.springer.com/gp/book/9783030547332
Climate, Fire and Human Evolution: The Deep Time Dimensions of the Anthropocene
https://www.springer.com/gp/book/9783319225111
Evolution of the Atmosphere, Fire and the Anthropocene Climate Event Horizon
https://www.springer.com/gp/book/9789400773318
From Stars to Brains: Milestones in the Planetary Evolution of Life and Intelligence
https://www.springer.com/us/book/9783030106027
Asteroids Impacts, Crustal Evolution and Related Mineral Systems with Special Reference to Australia
https://www.springer.com/us/book/9783319745442
The Fatal Species: From Warlike Primates to Planetary Mass Extinction
https://www.springer.com/gp/book/9783030754679
The Trials of Gaia. Milestones in the evolution of Earth with reference to the Antropocene
https://www.amazon.com.au/Trials-Gaia-Milestones-Evolution-Anthropocene/dp/3031237080

Will temperatures keep rising fast?

[ discussed at facebook - click on images to enlarge ]

The above image, created with Climate Reanalyzer data, shows the temperature anomaly (in °C) compared to the 1979-2000 mean. In blue are the years 1979-2022 and in black and white is the year 2023 through December 3, 2023. A trend is added in pink and white, based on 2023 data. Note that the 1979-2000 mean isn't pre-industrial, the anomaly from pre-industrial is significantly higher.

[ click on images to enlarge ]

The trend warns that temperatures could keep rising rapidly over the next few months. A number of things can contribute to such a rapid rise:

• The chance that the current El Niño will slow down over the next few months is minimal, as illustrated by the IRI image on the right.
  
  
• Earth's radiation imbalance is very high, as illustrated by the NASA image below.

• Antarctic sea ice extent is at record low for the time of year, as illustrated by the NSIDC image below, and the fall in extent is particularly steep in December. Sea ice loss results in less sunlight getting reflected back into space and instead getting absorbed by the ocean and the impact of Antarctic sea ice loss is even stronger than Arctic sea ice loss, as Antarctic sea ice is located closer to the Equator, as pointed out by Paul Beckwith in a video in an earlier post. A warmer Southern Ocean also comes with fewer bright clouds, further reducing albedo, as discussed here and here. For decades, there still were many lower clouds over the Southern Ocean, reflecting much sunlight back into space, but these lower clouds have been decreasing over time, further speeding up the amount of sunlight getting absorbed by the water of the Southern Ocean, and this 'pattern effect' could make a huge difference globally, as this study points out. Emissivity is a further factor; open oceans are less efficient than sea ice when it comes to emitting in the far-infrared region of the spectrum (feedback #23 on the feedbacks page).

• There is a huge danger that ocean heat will reach and destabilize methane hydrates that are contained in sediments at the seafloor of oceans, resulting in massive methane eruptions, as discussed in many earlier posts such as this one.


• Emissions are high and rising. On December 6, 2023, CO₂ was 420.16 ppm at Mauna Loa, Hawaii. Today’s greenhouse gas forcing of 4.6 W/m² is relative to mid-Holocene CO₂ of 260 ppm, i.e. the natural Holocene CO₂ level. Equilibrium global warming for today’s amount of greenhouse gases is 10°C, which is reduced to 8°C by today’s human-made aerosols. Warming in the past 6000 years was slowed down by aerosol cooling. Growing population, agriculture and land clearance produced aerosols and CO₂; wood was the main fuel for cooking and heating. Nonlinear aerosol forcing is largest in a pristine atmosphere. Impacts on people and nature will accelerate as global warming increases hydrologic (weather) extremes. The enormity of consequences demands a return to Holocene-level global temperature. (from: Global warming in the pipeline, by James Hansen et al.)

Rises in methane can cause rapid warming. The image below, created with a Copernicus forecast for December 6, 2023 03 UTC, shows very high methane levels at higher latitudes north at 500 hPa.

• 

  [ image from a 2014 post ]

  Meanwhile, as emissions keep rising, politicians refuse to act, preferring to debate the size of the "carbon budget". Sadly, the IPCC lends credibility to the idea that there was a "budget" to be divided among polluters, a "budget" that would enable polluters to keep polluting for decades to come. This adds a false sense of accountability to this "budget", as if it was checked and verified by scientists across the world. Instead, there is just a huge carbon debt that has to be removed from the atmosphere and the oceans.
  
  

• 

  [ image from the Extinction page ]

  As more people become aware of the dire situation, widespread panic can set in, as warned about in this 2007 post. Instead of crossing a social tipping point that prompts people into action to combat the temperature rise, panic may set in that stops many people from showing up at work, resulting in a rapid loss of the aerosol masking effect, as industries that now co-emit cooling aerosols (such as sulfates) grind to a halt. People may start to collect and burn more wood, resulting in an increase in emissions that speed up the temperature rise. As temperatures rise, more fires could also break out in forests, peatlands and urban areas including landfills and waste dumps, further contributing to emissions that speed up the temperature rise. 

As said, the 1979-2000 base used in the image at the top is not pre-industrial. Anomalies would be much higher when using a genuinely pre-industrial base. The image on the right uses a 2.29°C 2020 anomaly from 3480 BC.

The image on the right shows many elements that could jointly cause a rapid temperature rise of more than 10°C, in the process causing the clouds tipping point to get crossed that on its own can push up the temperature rise by a further 8°C.

Much of this is described at the extinction page.

Conclusion

The precautionary principle calls for comprehensive and effective action to reduce the damage and to improve the situation as described in this 2022 post, in line with recognition of the climate emergency we're in.


Links

• Climate Reanalyzer
https://climatereanalyzer.org/clim/t2_daily/?dm_id=world

• Columbia Climate School, International Research Institute for Climate and Society

https://iri.columbia.edu/our-expertise/climate/forecasts/enso/current/?enso_tab=enso-cpc_plume

• NASA - Earth's Radiation Balance

https://svs.gsfc.nasa.gov/5173

• National Snow and Ice Data Center (NSIDC)

https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph

• Global warming in the pipeline, by James Hansen et al. 
https://academic.oup.com/oocc/article/3/1/kgad008/7335889

• Copernicus - Methane forecasts
https://atmosphere.copernicus.eu/charts/packages/cams/products/methane-forecasts

• The Clouds Feedback and the Clouds Tipping Point
https://arctic-news.blogspot.com/p/clouds-feedback.html

• Extinction
https://arctic-news.blogspot.com/p/extinction.html

• Pre-industrial
https://arctic-news.blogspot.com/p/pre-industrial.html

• Transforming Society
https://arctic-news.blogspot.com/2022/10/transforming-society.html

• Climate Plan
https://arctic-news.blogspot.com/p/climateplan.html

• Climate Emergency Declaration
https://arctic-news.blogspot.com/p/climate-emergency-declaration.html