Arctic News: El Nino

Showing posts with label El Nino. Show all posts

Wednesday, February 4, 2026

Horrific temperature anomalies forecast over Arctic Ocean

Antarctic sea ice

The combination image below shows Antarctic sea ice thickness and concentration by the University of Bremen (left and center) and concentration by the National Snow and Ice Data Center (right) on February 9, 2026. The NSIDC image also shows the median Antarctic sea ice edge 1981-2010 highlighted in orange.

Loss of Antarctic sea ice can result in strong loss of global albedo, due to the size of Antarctic sea ice and its proximity to the Equator.

Arctic sea ice

Arctic sea ice volume is at a record low for the time of year, as it has been for well over a year. The above image shows Arctic sea ice volume through February 17, 2026.

Until now, Arctic sea ice volume for each day in 2026 has been lower than on comparable days for any previous year on record. The 2026 curve (black) is moving down, steeper than it did in 2024 (dark blue), even though an El Niño started early 2024 and continued until early 2025 (light blue). Arctic temperatures are terrifying and some temperature forecasts are horrendous (images below). Arctic temperatures have been rising, despite the move from an El Niño into the current La Niña over the past few years. Making the outlook even more dire, an El Niño is on the way.

The next El Niño

[ click on images to enlarge ]

Moving from the bottom of a La Niña to the peak of a strong El Niño alone can make a difference of more than 0.5°C, as discussed in an earlier post.

The images on the right and below are adapted from NOAA. The image on the right shows Niño-3.4 region temperature anomalies and forecasts. The image below shows that La Niña conditions have been present for most periods (18 out of 19) dating back to the May-June-July 2024 period.

[ click on images to enlarge ]

The image on the right, adapted from NOAA, shows ENSO (El Niño-Southern Oscillation) probabilities for the Niño3.4 region (5°N-5°S,120°W-170°W) relative sea surface temperature index, with El Niño (red bar) emerging in the course of 2026.

The combination image below, adapted from ECMWF, shows ENSO anomalies and forecasts for developments through February 2027 in Niño3.4 (left panel) and in Niño1+2 (right panel), indicating that the next El Niño will emerge and strengthen in the course of 2026.

The combination image below, adapted from ECMWF, shows anomalies and forecasts through August 2026 in the Niño3 region (left panel) and the Niño1+2 region (right panel).

PCC downplays Arctic temperature anomaly

The image below shows a horrendous temperature anomaly forecast, adapted from tropicaltidbits.com, valid for November 2026, with anomalies at the top end of the scale (13°C) showing up over most of the Arctic Ocean.

Sadly, the dangers are downplayed in many ways. One way the full wrath of temperature rise is all too often masked is through the use of a too recent base from which the temperature rise is calculated, and then to pretend that it was pre-industrial. Pre-historic obviously and by definition refers to times before the Industrial Revolution started, yet the IPCC seeks to downplay the dangers of crossing the Paris Agreement thresholds by using a more recent base, adding the excuse that it "approximates" pre-industrial.

As illustrated by the Eliot Jacobson image below, which uses a 3-year running mean, the temperature has meanwhile crossed the 1.5°C threshold and reached 1.53°C even when using an 1850-1900 base.

The image below shows rising annual Arctic temperature anomalies versus 1951-1980, with a peak occurring in 2016, which was a strong El Niño year, while temperatures have been rising over the past few years, despite the move from an El Niño into the current La Niña.

The image below shows the January 2026 temperature anomaly versus 1951-1980, with the highest anomalies showing up over the Arctic, due to sea ice loss and increasingly extreme weather events resulting from distortion of the Jet Stream, which also contributed to low temperatures in parts of the U.S. and Russia. Feedbacks in the Arctic and the horrendous rise of Arctic temperatures is all too often masked by a focus on long-term global averages.

The image below shows the NASA January 2026 temperature anomaly versus 1951-1980.

On the image below, the NASA Land Only temperature anomaly with respect to 1880-1890 (not pre-industrial) through January 2026 shows the 1.5°C threshold crossed for all months since 2022 (black squares connected by black lines). The Lowess 3-year smoothing trend (red line) indicates that the 2°C threshold was crossed since 2022 and that 3°C may get crossed soon on land (where most people live), in 2029 if this trend continues (dashed extension).

The image below shows NASA annual temperature anomalies (land-only) compared to 1880-1920 with a trend added that points at 3°C getting crossed in 2027.

The above image uses annual data and shows the trend pointing at the 3°C threshold getting crossed in early 2027. Humans are likely to go extinct with a 3°C rise, so the canvas in the above image is limited to 3°C. For a rise beyond 3°C, see the image below and the Extinction page.

The inset with the pink/white canvas on the image below shows ERA5 global surface air temperature daily anomalies in °C versus 1991-2020 through February 11, 2026, with a polynomial trend added highlighting temperature variations in line with seasons, El Niño/La Niña, feedbacks, etc. The background image with the yellow canvas shows the same data and added trend on a larger canvas, with the trend pointing at a rise of 10°C in January 2027.

[ click on images to enlarge, this image is also discussed on facebook ]

[ from earlier post ]

Both the SSP1-1.9 and SSP1-2.6 scenarios required methane emissions to have fallen since 2015. Even for SSP2-4.5, in which 2°C does get crossed, methane emissions would need to fall.

However, there was record growth in methane concentration in 2021 and while there was a bit of a slowdown in the following years, growth in methane concentration has picked up pace again recently, as illustrated by the image below.

The magenta-colored trend in the image below points at methane more than doubling by 2043.

The above images depict horrendous dangers, and the IPCC has yet to respond.

As the EPA animation on the right illustrates, a relatively small rise in average temperature can result in a lot more hot and extremely hot weather.

The three images underneath, from the IPCC, show the effect on extreme temperatures when (a) the mean temperature increases, (b) the variance increases, and (c) when both the mean and variance increase for a normal distribution of temperature.

Another way used to downplay the dangers is by averaging out peak impact, i.e. the most destructive impact. Averaging out peaks can be done by looking at large areas with a low resolution. As an example, land-only temperatures are rising faster than ocean temperatures. Since most people live on land, it's crucial to report the full temperature peaks on land, rather than the global average.

Yet another way used to downplay the dangers is by averaging the temperature rise out over long periods of time. How can the thresholds set at the Paris Agreement best be measured? Is a threshold deemed to be crossed when the anomaly from pre-industrial crosses the threshold for a month, or for a year, or for a decade?

Averaging out over a long period can be used to downplay the dangers in efforts to effectively grant polluters a long grace period during which they can continue to pollute.

Uncertainty is often pointed at as an excuse to downplay the dangers, but even in case there is uncertainty, downplaying the dangers constitutes a violation of the crucial precautionary principle, as illustrated by the cartoon below.

An engineer building a bridge will calculate the load it must handle by looking at how many heavy trucks could be on the bridge simultaneously (PEAK traffic), rather than by averaging the weight of all vehicles crossing the bridge over 30 years.
Caption and image by Sam Carana, image is from earlier post.

Will life soon disappear?

[ from earlier post ]

The image on the right uses content from a study by Christina Schädel et al, which concludes that permafrost fires and thaw will release 63 Gt C for each degree Celsius rise in temperature from a 389-691 Gt pool of permafrost carbon.

That 63 Gt C would translate into 231 Gt CO₂ if only CO₂ gets released. By comparison, the total annual human emissions are now about 55 Gt CO₂e and NOAA calculates that the atmosphere has changed from 1750 to 2024 by 539 CO₂e due to people's greenhouse gas emissions.

Importantly, some of the carbon will be released in the form of methane and CO₂e is much higher for releases in the form of methane than for carbon dioxide, especially when a high multiplier is used to calculate methane's CO₂e. Even worse, releases from submarine permafrost would come mostly in the form of methane.

The danger is even more menacing when looking at how fast temperatures are rising in the Arctic and when including more feedbacks, i.e. not only the impact of permafrost fires and permafrost thaw, but also the impact of destabilizing sediments at the seafloor of the Arctic Ocean resulting in eruptions of huge amounts of methane, on top of the impact of albedo loss and loss of the latent heat buffer of declining sea ice and permafrost.

Furthermore, drawing linear trends can mask recent or near-future acceleration that may strengthen over the years. Moreover, crossing tripping points can result in huge abrupt changes. A recent study warns about States and financial bodies using modelling that ignores shocks from extreme weather and climate tipping points.

Warnings are further illustrated by the image below that features a gradually accelerating decline in biodiversity (red line) and infrastructure growth over time followed by imminent and abrupt infrastructure decline (grey line). The image warns that a false focus can cause imminent or ongoing collapse to be ignored.

[ click on images to enlarge, image is discussed on facebook ]

Ultimately, economic projections fail because they focus on money, global GDP, and similar constructs, ignoring the damage occurring to the soil, water, atmosphere and the very conditions that sustain life. Increasingly unlivable conditions result from a failure to correct this false focus, from a refusal to accept that what's really important is disappearing, indeed that life itself is disappearing before our own eyes.

In the video below, Guy McPherson discusses problems forests have in adapting to rising temperatures, illustrating the dangers.

Indeed, temperatures are rising too fast for forests to adapt by moving to higher latitudes. It takes centuries for tree populations to adapt—far too slow to keep pace with today’s rapidly warming. Merely planting trees may not help much if the soil lacks ectomycorrhizal fungi, a recent study points out. Also adding biochar to the soil may help, but there currently isn't much government support - support should preferably come in the form of local feebates.

Climate Emergency Declaration

The situation is dire and unacceptably dangerous, and the precautionary principle necessitates rapid, comprehensive and effective action to reduce the damage and to improve the outlook, where needed in combination with a Climate Emergency Declaration, as described in posts such as in this 2022 post and this 2025 post, and as discussed in the Climate Plan group.

Links

• NSIDC - Sea Ice Today
https://nsidc.org/sea-ice-today

• University of Bremen - sea ice concentration and thickness
https://seaice.uni-bremen.de/start
• Danish Meteorological Institute - Arctic sea ice volume and thickness
https://ocean.dmi.dk/arctic/icethickness/thk.uk.php

• Tropicaltidbits.com
https://www.tropicaltidbits.com
image discussed on facebook at:
https://www.facebook.com/groups/arcticnews/posts/10163809174829679

• NOAA - ENSO: Recent Evolution, Current Status and Predictions (pdf)
https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/lanina/enso_evolution-status-fcsts-web.pdf
discussed on facebook at:
https://www.facebook.com/groups/arcticnews/posts/10163809174829679

• NOAA - ENSO Alert System Status (pdf)

https://cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.pdf

• NOAA - ENSO Alert System Status

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml

• NOAA - Relative Oceanic Niño Index (RONI): Historical El Niño / La Niña episodes
https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni
discussed on facebook at:
https://www.facebook.com/groups/arcticnews/posts/10163817526189679

• ECMWF (European Centre for Medium-Range Weather Forecasts) - Niño Plumes
https://charts.ecmwf.int/products/seasonal_system5_nino_annual_plumes
discussed on facebook at:
https://www.facebook.com/groups/arcticnews/permalink/10163819996829679
set 2:
https://charts.ecmwf.int/products/seasonal_system5_nino_plumes
discussed on Facebook at:
https://www.facebook.com/groups/arcticnews/?multi_permalinks=10163853533389679

• NASA - Goddard Institute for Space Studies (GISS) Surface Temperature Analysis

https://data.giss.nasa.gov/gistemp

• When Will We Die?

https://arctic-news.blogspot.com/2019/06/when-will-we-die.html

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

• Copernicus ERA5 data
https://pulse.climate.copernicus.eu

• Coupled, decoupled, and abrupt responses of vegetation to climate across timescales - by David Fastovich et al.
https://www.science.org/doi/10.1126/science.adr6700
discussed on facebook at:

https://www.facebook.com/groups/arcticnews/posts/10163832954534679

• Climate mismatches with ectomycorrhizal fungi contribute to migration lag in North American tree range shifts - by Michael Van Nuland et al.
https://www.pnas.org/doi/10.1073/pnas.2308811121
discussed on facebook at:

https://www.facebook.com/groups/arcticnews/posts/10163832955574679

• Science Snippets: Linking Plants with Soil - video by Guy McPherson
https://www.youtube.com/watch?v=6TNxF9o2aTk

• Biochar - group on facebook

https://www.facebook.com/groups/biochar

• Greenhouse gas rising
https://arctic-news.blogspot.com/2026/01/greenhouse-gas-rising.html

• The threat of seafloor methane eruptions
https://arctic-news.blogspot.com/2025/11/the-threat-of-seafloor-methane-eruptions.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

Sunday, January 4, 2026

Sea ice loss increases methane danger

Antarctic sea ice

The combination image below shows Antarctic sea ice thickness and concentration by the University of Bremen (left and center) and concentration by the National Snow and Ice Data Center (right) on January 16, 2026. The NSIDC image also shows the median Antarctic sea ice edge 1981-2010 highlighted in orange.

Massive loss of albedo (reflectivity) amplifies the decline of Antarctic sea ice and the decline of the snow and ice cover over Antarctica, resulting in elevation of the global temperature that can be expected to persist at least through September 2026, when Arctic sea ice typically reaches its minimum extent.

Less Antarctic sea ice contributes strongly to lower albedo, due to the size of Antarctic sea ice and its proximity to the Equator.

The image below, by Eliot Jacobson, shows that the 36-month running average for the Earth's albedo has meanwhile hit yet another new record low, at 28.689%.

Additional elevation of the global temperature can be expected due to an emerging El Niño.

The next El Niño

[ click on images to enlarge ]

The above image shows very high temperature anomalies forecast around Antarctica and over the Arctic Ocean for September 2026, at a time when Arctic sea ice volume is expected to be very low. Moving from the bottom of a La Niña to the peak of a strong El Niño can in itself make a difference of more than 0.5°C, as discussed in an earlier post.

The image on the right, adapted from NOAA, shows Niño-3.4 region temperature anomalies and forecasts.

The image on the right, adapted from NOAA, shows ENSO (El Niño-Southern Oscillation) probabilities, with El Niño (red bar) emerging in the course of 2026.

The image below, adapted from ECMWF, shows the ENSO anomalies and forecasts for developments through November 2026 in Niño3.4 (left panel) and in Niño1+2 (right panel), indicating that the next El Niño will emerge and strengthen in the course of 2026.

[ from earlier post ]

Arctic sea ice

Sea ice is low at both poles. This results in loss of global albedo, which elevates temperatures. El Niño can be expected to further elevate temperatures in the course of 2026.

Adding to the problems, Arctic sea ice has become very thin. Arctic sea ice volume is at a record low for the time of year, it has been at a record daily low for well over a year. The above image shows Arctic sea ice volume through January 15, 2026.

As illustrated by the above image, Arctic sea ice volume in April 2025 was very low, so while relatively little melting took place between April 2025 and September 2025, a record low Arctic sea ice volume was still reached in September 2025. The above image shows Arctic sea ice volume through mid December 2025, with an analysis of the strength of the melting between April (annual maximum) and September (annual minimum). If the trend in annual maxima (blue circles) continues, Arctic sea ice in 2026 looks set to reach an even lower volume in April 2026. The difference between strong melting (magenta) and little melting (green) is 3000 km³, so if strong melting will take place from April 2026, this may well cause a Blue Ocean Event to occur later in 2026. A Blue Ocean Event could be said to occur when only 1000 km³ or less Arctic sea ice volume remains.

There is a huge danger that seafloor methane and methane from thawing terrestrial permafrost will add strongly and abruptly to the temperature rise, as discussed in many earlier posts such as this one and as illustrated by the screenshot below.

[ screenshot from earlier post ]

Greenhouse gas concentrations

Carbon dioxide concentrations typically reach an annual maximum in May. The image below shows carbon dioxide concentrations (surface flasks) as high as 437 ppm recorded half 2025 at Mauna Loa, Hawaii.

Currently, concentrations of greenhouse gases at Utqiaġvik (formerly Barrow), Alaska, are very high and rising. The image below is adapted from an image issued by NOAA January 8, 2026, and shows recent monthly carbon dioxide concentrations as high as 442 ppm.

The image below shows daily measurements of carbon dioxide concentrations from 2020

The above image and the images below are adapted from images issued by NOAA January 6, 2026.

These images show concentrations of greenhouse gases recorded at the Barrow Atmospheric Baseline Observatory (BRW), a NOAA facility located near Utqiaġvik (formerly Barrow), Alaska, at 71.32 degrees North latitude.

The image below shows hourly average methane measurements from 2020.

The image below shows monthly average methane measurements from 2001.

The image below shows monthly average nitrous oxide measurements from 2016.

Temperatures

The image below with NASA Land-Only annual anomalies with respect to 1880-1912 shows that 1.5°C was crossed for all years from 2015 through 2025 (black squares). Lowess 3-year smoothing trend (red line) indicates that 2°C was crossed after 2022 (in 2023, 2024 and 2025) and that 3°C may get crossed soon, as early as in 2031 if this trend continues (dashed extension). Note that the 1880-1912 base is not pre-industrial. Temperature anomalies can be even higher when a genuinely pre-industrial base is used.

The above image also illustrates how much difference it can make for temperature anomalies on land to go from a La Niña to an El Niño. The year 2022 was a La Niña year and the temperature anomaly on land was less than 1.8°C vs 1880-1912. El Niño conditions prevailed from March 2023 to March 2024, and the temperature anomaly in 2024 was about 0.6°C higher than it was in 2022. This makes one wonder by how much the temperature anomaly will go up compared to 2025, if El Niño conditions will emerge in 2026 and persist into 2027.

The image below illustrates that, in the Northern Hemisphere, 2025 was the third year in a row with temperature anomalies more than 1.5°C above 1951-1980 and much more when compared to pre-industrial. Note also that El Niño wasn't elevating temperatures in 2025.

The above image illustrates that, in the Northern Hemisphere, 2025 was the third year in a row with temperature anomalies higher than 1.5°C above 1951-1980. Note that temperature anomalies will be much higher when compared to pre-industrial. Note also that El Niño wasn't elevating the temperature in 2025.

As illustrated by the image on the right, the highest temperature anomalies in the Northern Hemisphere in 2025 occurred over the Arctic Ocean.

This is further illustrated by the image below that shows the NASA 2025 temperature anomaly.

The image below shows a temperature anomaly forecast, adapted from tropicaltidbits.com, valid for September 2026.

The image below shows a temperature anomaly forecast, adapted from tropicaltidbits.com, valid for October 2026, with anomalies at the top end of the scale (13°C) showing up over much of the Arctic Ocean.

In the video below, Guy McPherson discussed the danger of rising temperatures.

The heat in the Arctic also manifested itself in a Sudden Stratospheric Warming event recently, as illustrated by the image below.

[ click on images to enlarge ]

The above image illustrates how heat rising high up in the atmosphere resulted in temperatures as high as -23°C (-9.5°F) at 10 hPa over Russia at the green circle (globe on the left) on January 10, 2026.
At the same time, this resulted in very low temperatures at surface level. Temperatures of -41°C (41.9°F) were recorded at the green circle (globe on the right).

The image on the right illustrates that low surface (2 meter) temperatures can be expected to persist in January 2026. The image shows a forecast for January 29, 2026.

Climate Emergency Declaration

UN secretary-general António Guterres recently spoke about the need for “a credible global response plan to get us on track” regarding the international goal of limiting the global temperature rise. “The science demands action, the law commands it,” Guterres said, in reference to a recent international court of justice ruling. “The economics compel it and people are calling for it.”

What could be added is that the situation is dire and unacceptably dangerous, and the precautionary principle necessitates rapid, comprehensive and effective action to reduce the damage and to improve the outlook, where needed in combination with a Climate Emergency Declaration, as described in posts such as this 2022 post and this one and as discussed in the Climate Plan group.

Links

• NSIDC - Sea Ice Today
https://nsidc.org/sea-ice-today

• University of Bremen - sea ice concentration and thickness
https://seaice.uni-bremen.de/start

Monday, December 29, 2025

Huge temperature rise in 2026?

[ image from 1991 poster ]

The image on the right was included in a poster featuring at the AGU Fall Meeting in 1991. The image warned about an escalating temperature rise in the Arctic, pointing at a 10°C rise in the Arctic by 2036. The poster warns that this rise threatens to trigger seafloor methane releases resulting in runaway global warming.

Over time, further contributors to the temperature rise have been highlighted with the warning that they could jointly trigger a total potential global temperature rise of 10°C as early as 2026.

A huge temperature rise threatens to unfold and it could do so as early as next year (2026), as illustrated by the image on the right. Altogether, the temperature rise from pre-industrial could be more than 18.44°C by the end of 2026.

[ see the Extinction page ]

The barchart on the right conceptually dates back to 2016, when a strong El Niño came with a strong temperature rise. When expressed by means of a polynomial trend that was extended by a decade, the trend pointed at a 10°C rise by 2026.

The barchart has basically remained the same over the past ten years, be it that the historic temperature rise from pre-industrial has turned out to be larger (pink) and that the cloud feedback could add a further 8°C to the rise (grey). Also, for clarity, aerosols have been split up into on the one hand sulfates (green) and on the other hand carbon monoxide, black & brown carbon and non-methane volatile organic carbon (brown).

Importantly, posts have over time pointed out that humans are likely to go extinct with a rise of 3°C and most life on Earth will disappear with a 5°C rise, as illustrated by the image below, from an analysis discussed in an earlier post.

With the year 2026 approaching fast, it is time to have another look at how fast and by how much temperatures could rise. The danger of a strong El Niño emerging in 2026 is highlighted below and this could come at a time when emissions are high, Earth's albedo is low and both land and ocean sinks are losing their capacity to take up carbon dioxide and heat.

[ from earlier post ]

The image below shows how, over the course of the year, temperature anomalies in 2023, 2024 and 2025 each have at times reached the highest daily records, even though 2025 wasn't an El Niño year. The image shows temperature anomalies from 1940 through to December 29, 2025, compared to 1991-2020, which isn't pre-industrial.

[ click on images to enlarge ]

The image below, from an earlier post, shows NASA Land Only monthly temperature anomalies (black squares) with respect to 1880-1890 (not pre-industrial) through November 2025 and shows the 1.5°C threshold crossed for all months since 2022. The Lowess 3-year smoothing trend (red line) indicates that the 2°C threshold was crossed in 2022 and that 3°C may get crossed in 2028 if this trend continues (dashed extension). The picture could look even worse when a genuinely pre-industrial base was used and a polynomial trend was applied and extended.

[ Potential Land-only rise, from earlier post ]

As said, the image at the top shows very high temperatures in 2025, even though 2025 wasn't an El Niño year. In other words, current temperatures are suppressed. Moving from the bottom of a La Niña to the peak of a strong El Niño can in itself make a difference of more than 0.5°C. This is illustrated by the image below, from an earlier post, that shows a temperature rise of more than 0.5°C from November 2022 to March 2023, when the last El Niño had not yet even started.

[ Temperature rise due to El Niño from earlier post ]

How deep into La Niña conditions are we at the moment? Sea surface temperatures in the Niño-3.4 region of the equatorial Pacific Ocean (5°N-5°S, 120°W-170°W) are indicative for El Niño/La Niña conditions. The image below shows the location of that region (square on the globe, inset) and graphs with the sea surface temperatures in the Niño-3.4 region for each of the days of the years from 1981 through December 27, 2025.

The image below shows a graph with temperature anomalies in the Niño-3.4 region from 1950 through November 2025, when the anomaly was -0.68°C.

[ click on images to enlarge ]

The image on the right shows a NOAA update of Niño-3.4 region temperature anomalies and forecasts.

NOAA considers a La Niña event to occur when a one-month negative sea surface temperature anomaly of -0.5° C or less is observed in the Niño-3.4 region of the equatorial Pacific Ocean (5°N-5°S, 120°W-170°W) and is forecasted to persist for three consecutive months, while an atmospheric response typically associated with La Niña must also be observed over the equatorial Pacific Ocean.

[ from an earlier post ]

The image on the right, adapted from NOAA, shows ENSO (El Niño-Southern Oscillation) probabilities, with El Niño (red bar) emerging in the course of 2026.

The graph below, adapted from tropicaltidbits, uses CDAS (Climate Data Assimilation System) data showing an anomaly of -1.272°C on Dec 28, 2025. The graph gives another idea as to how deep we have descended into La Niña conditions.

The CDAS analysis below shows very low sea surface temperature anomalies (in blue) in the Niño3.4 region in the Central Pacific on December 28, 2025.

[ from earlier post ]

How large could the temperatures rise be?

Sea ice is low at both poles. The image below shows Antarctic sea ice on December 31, 2025. Massive loss of albedo amplifies the decline of Antarctic sea ice and the decline of the snow and ice cover over Antarctica, resulting in elevated global temperatures that could persist through September 2026, when Arctic sea ice typically reaches its minimum extent.

As discussed above, moving from the depth of a La Niña to the peak of a strong El Niño in itself could make a difference in the global temperature of more than 0.5°C. Add up feedbacks and the combined impact could trigger a huge temperature rise, since the rise is already accelerating, due to the self-amplifying nature of feedbacks such as albedo loss and more water vapor in the atmosphere, and due to further feedbacks that come with the temperature rise itself such as ocean stratification.

[ image from earlier post ]

[ from earlier post ]

Oceans are still absorbing an estimated 91% of the excess heat energy trapped in the Earth's climate system due to human-caused global warming. If just a small part of that heat instead remains in the atmosphere, this could constitute a huge rise in air temperature. Heat already stored in the deeper layers of the ocean could also rise up and commit Earth to further additional surface warming in the future.

The image on the right illustrates how the temperature rise can cause oceans to take up less heat, resulting in more heat remaining in the atmosphere.

[ from earlier post ]

The above image shows very high temperature anomalies forecast around Antarctica and over the Arctic Ocean for September 2026, at a time when Arctic sea ice volume is expected to be very low. Arctic sea ice volume is at a record low for the time of year, it has been at a record daily low for well over a year. The image below shows Arctic sea ice volume through December 30, 2025.

[ screenshot from earlier post ]

The methane danger is further illustrated by the image below that shows hourly average in situ methane measurements well above 2400 ppb (parts per billion). The image is adapted from an image issued by NOAA December 31, 2025. The image shows methane recorded over the past few years at the Barrow Atmospheric Baseline Observatory (BRW), a NOAA facility located near Utqiaġvik (formerly Barrow), Alaska, at 71.32 degrees North latitude.

Climate Emergency Declaration

UN secretary-general António Guterres recently spoke about the need for “a credible global response plan to get us on track” regarding the international goal of limiting the global temperature rise. “The science demands action, the law commands it,” Guterres said, in reference to a recent international court of justice ruling. “The economics compel it and people are calling for it.”

What could be added is that the situation is dire and unacceptably dangerous, and the precautionary principle necessitates rapid, comprehensive and effective action to reduce the damage and to improve the outlook, where needed in combination with a Climate Emergency Declaration, as described in posts such as this 2022 post and this one and as discussed in the Climate Plan group.

Links

• AGU poster

https://arctic-news.blogspot.com/p/agu-poster.html

• Climate Reanalyzer
https://climatereanalyzer.org

• NSIDC - Sea Ice Today
https://nsidc.org/sea-ice-today

• Tropicaltidbits.com
https://www.tropicaltidbits.com

• Copernicus
https://pulse.climate.copernicus.eu

• NOAA - ENSO: Recent Evolution, Current Status and Predictions

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/lanina/enso_evolution-status-fcsts-web.pdf

• NOAA - ENSO sea surface temperatures
https://www.ncei.noaa.gov/access/monitoring/enso/sst

• ECMWF
https://charts.ecmwf.int/products/seasonal_system5_nino_annual_plumes