Archives de catégorie : climate-debate

World’s largest lakes reveal climate change trends

by Michigan Technological University, Jan 21, 2021 in ScienceDaily


NASA-funded research on the 11 largest freshwater lakes in the world coupled field and satellite observations to provide a new understanding of how large bodies of water fix carbon, as well as how a changing climate and lakes interact.

One of the most remarkable aspects of the results is just how fast changes in these freshwater lakes have occurred — a noticeable amount in fewer than 20 years. The research contributes to NASA’s Carbon Monitoring System’s goal of determining how much freshwater lakes contribute to the global carbon cycle.

“Three of the largest lakes in the world are showing major changes related to climate change, with a 20-25% change in overall biological productivity in just the past 16 years,” Fahnenstiel said.

More Than Algae

In the 16 years of data, Great Bear and Great Slave lakes in northern Canada saw the greatest increases in productivity, while Lake Tanganyika in southeastern Africa has seen decreases. The trends are linked to increases in water temperatures, as well as solar radiation and a reduction in wind speed.

Sayers said looking at productivity, algal abundance, water clarity, water temperature, solar radiation and wind speeds at freshwater lakes provides a richer picture of the overall ecosystem.

“Temperature and solar radiation are factors of climate change,” Sayers said. “Chlorophyll and water transparency changes are not necessarily caused by climate change, but could be caused by eutrophication or invasive species, like quagga mussels.”

Failing Computer Models

by P. Homewood ,Jan 21, 2021 in NotaLotofPeopleKnowThat


If anybody tries to tell you that the computer models are accurately predicting global warming, show them this:

http://www.remss.com/research/climate/#:~:text=The%20RSS%20merged%20lower%20stratospheric%20temperature%20data%20product,in%20well-mixed%20greenhouse%20gases%20causes%20by%20human%20activity.

It comes from RSS, who monitor atmospheric temperatures via satellite observation. They are ardent warmists, and here us what they have to say:

….

ANTARCTICA SUFFERING COLDEST JANUARY SINCE 1978 + GLOBAL SEA ICE GROWING EXPONENTIALLY

by Cap Allon, Jan 20, 2021 in Electroverse


The start of 2021 in Antarctica has been an unusually chilly one. In fact, the first half of January has been the coldest since 1978, according to data compiled by @LpdlcRamirez and @peikko763 on Twitter.

As of Jan. 19, the month-to-date temperature anomaly across Antarctic is approx. -0.5C, making this the continents coldest first 3-or-so-weeks of Jan. since 1978 (solar minimum of cycle 20), according to research conducted by @peikko163 on Twitter, who also notes that the Southern Hemisphere as a whole is suffering anomalous January chills not seen since 2012.

But this chill of solar minimum isn’t just confined to the Southern Hemisphere either, the mercury ACROSS the planet is tumbling. In one month global temperatures dropped by a whopping 0.26C: from 0.53C above the 1981-2010 avg. in Nov. 2020 to just 0.27C above the avg. in Dec. 2020 (UAH). This drop was in spite of a warming Arctic–a region expected to “heat” during times of otherwise “global” cooling (more on that below).

The Sun appears to be sliding into its next Grand Solar Minimum cycle–a multidecadal spell of reduced solar output where the solar disc can be devoid of sunspots for months or even years at a time. The result on Earth’s climate will be one of violent swings between extremes due to a weakening of the jet streams: intense bursts of heat will linger in one area, while a teeth-chattering chill will dominate nearby, and then the regions will “switch” — it is this unpredictable chopping and changing that will hasten the failure of our modern food production systems: crops will fail, on a large scale, and famine could quickly ensue.

Overall, Earth’s temperature trends colder during a Grand Solar Minimum, as the Sun’s output sinks lower and lower (increased cloud nucleation being one likely forcing). However, not ALL regions experience the chill: as with the previous GSM (the Maunder Minimum 1645-1715), areas such as the Arctic, Alaska, and S. Greenland/N. Atlantic actually warmed while the rest of the planet cooled — NASA reveals the phenomenon in their Maunder Minimum temperature reconstruction map:

The IR absorptive characteristics of “greenhouse” gases–David Coe

by P. Homewood, Jan 17, 2021 in NotaLotofPeopleKnowThat


SUMMARY

Using well documented data on the infra-red absorption spectra of atmospheric gases it is a straight-forward process to infer the overall atmospheric IR absorption and from that the effective global average temperature. The simplest of atmospheric models has been used: the atmosphere is considered to be a uniform thin absorbing layer of gas. The results demonstrate clearly that the warming effect of the atmosphere is almost entirely due to the spectral absorption characteristics of CO2 and H2O. They are both exceptionally strong absorbers of infra-red radiation. It is however this strength which determines the characteristics of the earth’s temperature, and in particular its stability.

70% of the energy radiated from the earth is removed by a mixture of 0.1% H2O and 200ppm of CO2. This alone is sufficient to raise global temperatures from the chilly 255K of the estimated zero atmosphere condition to 284.3K, less than 4deg below current average temperatures. An estimation of the current atmospheric mixture of gases is calculated to deliver a global mean temperature of 286.8K close to the best estimate of 288K for that temperature. Further increases in both H2O and CO2 have relatively small impacts on temperatures. This is due simply to the fact that at current concentrations the spectra of both H2O and CO2 have effectively extracted most of the energy at wavebands corresponding to their molecular absorption spectra. There is little further energy to be extracted by adding more H2O and CO2. This results in climate sensitivity values of less than 0.5degC, in comparison to the 1.5 to 5 degC range quoted by the IPCC.

CO2 levels of 3000ppm will only raise temperatures by a further 1.5K. These temperature increases are in fact well within natural variations seen in the past, including the medieval warm period and the little ice age of some 300 years ago.

The possibility of positive feedback from water vapour is discounted by the simple fact that the H2O spectrum is incapable of absorbing significant further amounts of radiated energy and the modest increase in temperature due to increasing CO2 levels is unable to deliver any significant increase in H2O concentration due to the specific relationship of H2O saturation vapour pressure and temperature. It would take an increase in temperature of 10degC to double the mean H2O atmospheric concentration, and that doubling would only result in a temperature increase of 2degC.

The impact of other known “greenhouse’ gases, CH4 and N2O are also calculated from known IR spectra data. Their absorption spectra are swamped by H2O and CO2. The combined warming caused by current atmospheric concentrations will elevate temperature by only 0.2K and increasing concentrations by a factor of 10 will only result in a further temperature increase of 0.5K.

The “greenhouse effect” is dominated by the absorption spectrum of H2O with a little help from CO2. At current concentrations of both gases it is inconceivable that further increases in concentrations will lead to any significant warming. Increasing CO2 concentration to 3000ppm and doubling the mean H2O level to 2% would result in a global temperature increase of 3.4K.

In short, there is no climate emergency, at least due to “greenhouse gases”.

 The full paper can be read here:

co2-the-miracle-molecule-22637

See this Addendum

Committed warming and the pattern effect

by Nic Lewis, Jan 19, 2021 in ClilmateEtc.


Key points

  • The pattern effect is the dependence of outgoing radiation to space on the spatial pattern of surface warming.
  • A pattern effect, relative to that in equilibrium, can be caused both by evolution over time in the climate system’s response to forcing and by its internal variability.
  • The paper fails to distinguish between a historical period pattern effect that is forced, which will unwind very slowly, and one that is caused by internal variability, which can quickly unwind, causing rapid warming.
  • The forced pattern effect is very small in CAM5.3
  • The pattern effect found in the paper is greatly affected by being estimated during the hiatus.
  • The estimated post-hiatus unforced historical pattern effect is non-negligible in CAM5.3 when using the AMIP2 sea surface temperature dataset, as in the paper, but negligible when using the UK Met Office HadISST1 dataset.
  • The historical pattern effect is not robust; it varies hugely between models and SST datasets.
  • The paper’s claims about greater committed warming directly reflect its estimate of the size of the historical pattern effect.

Introduction

A new paper “Greater committed warming after accounting for the pattern effect” led by Chen Zhou  (Zhou et al.[1]) has recently been published in Nature Climate Change. Here is the accompanying press release.

Warmer Than Thought? GWPF Science Editor Sceptical About New Ocean-Warming Paper

by RFI, Jan 12, 2021 in GWPF


A new report published in the US journal Science, led by the Chinese Academy of Sciences, suggests the world’s oceans are warming 40 percent faster than what a UN panel predicted five years ago. Although data collection is more accurate than in the past, some experts advise against jumping to hasty conclusions.

About 93 percent of excess heat trapped around the Earth by greenhouse gases that come from the burning of fossil fuels accumulates in the world’s oceans.

The UN Intergovernmental Panel on Climate Change (IPCC) says ocean warming has led to rising sea levels and contributes to increases in rainfall intensity, more violent storms and the destruction of coral reefs.

It is also a threat to biodiversity and one of the earth’s major food supplies.

“Ocean heating is a very important indicator of climate change, and we have robust evidence that it is warming more rapidly than we thought,” said co-author Zeke Hausfather, a graduate student in the Energy and Resources Group at the University of California, Berkeley.

Their report relied on four studies, published between 2014 and 2017 whose conclusions are based on measurements recorded by a fleet of some 4,000 floating robot monitors called Argo.

The robots drift throughout the world’s oceans, every few days diving to a depth of 2,000 meters and measuring the ocean’s temperature, pH, salinity and other information.

Argo “has provided consistent and widespread data on ocean heat content since the mid-2000s,” the report said.

The new analysis shows warming in the oceans is on pace with measurements of rising air temperature.

And if nothing is done to reduce greenhouse gases, “models predict that the temperature of the top 2,000 meters of the world’s oceans will rise 0.78 degrees Celsius by the end of the century,” it said.

Caution needed when interpreting results

David Whitehouse, the science editor for the Global Warming Policy Forum, based in the UK says we must very careful when drawing conclusions.

Continuer la lecture de Warmer Than Thought? GWPF Science Editor Sceptical About New Ocean-Warming Paper

Peer-Reviewed Study Confirms Antarctica Has Not Warmed in Last Seven Decades

by P. Homewood, Jan 16, 2021 in NotaLotofPeopleKnowThat


Cancel all the claims by climate activists that global warming is decimating Antarctica. A peer-reviewed study recently published in one of the most prominent science journals destroys one of the most frequently asserted claims by climate activists – that climate change is warming Antarctica and melting the Antarctic ice sheet. The recent study confirms Antarctica has not warmed in the past 70 years and Antarctic ice cover is expanding rather than shrinking.

Writing in the journal Nature, scientists at Columbia University and the University of Victoria, British Columbia report, “The Antarctic continent has not warmed in the last seven decades, despite a monotonic increase in the atmospheric concentration of greenhouse gases.”

 

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AT LEAST 13 DEAD, HUNDREDS HOSPITALIZED AS RECORD SNOWSTORMS SWEEP JAPAN

by Cap Allon, Jan 23, 2021 in Electroverse


Following the historic snowstorms of the past few weeks, Japan has been hit again: at least 13 people died and more than 250 were injured as record snowfall blanketed regions along the Sea of Japan coast, according to the latest report by the nation’s Disaster Management Agency.

Among those to have lost their lives were three people in Fukui Prefecture, and four in Niigata Prefecture, all reportedly while trying to remove the snow which topped a whopping 3.13 meters (10.3 feet) in some areas.

According to Japan’s Meteorological Agency (JMA), at least 10 monitoring stations along the Sea of Japan set new all-time 72-hour snowfall records late on Jan. 10, and many more busted all-time low temperature records, including in Furue, Kamigoori, and Kuzakai–with the latter logging a bone-chilling -24C (-11F).

 

 

 

Distorting the view of our climate future: The misuse and abuse of climate pathways and scenarios

by R. Pielke & J. Richtie, 2020 in EnergyRes&SocScience


Abstract

Climate science research and assessments under the umbrella of the Intergovernmental Panel on Climate Change (IPCC) have misused scenarios for more than a decade. Symptoms of misuse have included the treatment of an unrealistic, extreme scenario as the world’s most likely future in the absence of climate policy and the illogical comparison of climate projections across inconsistent global development trajectories. Reasons why such misuse arose include (a) competing demands for scenarios from users in diverse academic disciplines that ultimately conflated exploratory and policy relevant pathways, (b) the evolving role of the IPCC – which extended its mandate in a way that creates an inter-relationship between literature assessment and literature coordination, (c) unforeseen consequences of employing a temporary approach to scenario development, (d) maintaining research practices that normalize careless use of scenarios, and (e) the inherent complexity and technicality of scenarios in model-based research and in support of policy. Consequently, much of the climate research community is presently off-track from scientific coherence and policy-relevance. Attempts to address scenario misuse within the community have thus far not worked. The result has been the widespread production of myopic or misleading perspectives on future climate change and climate policy. Until reform is implemented, we can expect the production of such perspectives to continue, threatening the overall credibility of the IPCC and associated climate research. However, because many aspects of climate change discourse are contingent on scenarios, there is considerable momentum that will make such a course correction difficult and contested – even as efforts to improve scenarios have informed research that will be included in the IPCC 6th Assessment.

Claim: The Temperature Spike Just Prior to the Little Ice Age can Teach Us about Modern Global Warming

by E. Worall, Jan 7, 2021 in WUWT


According to Patric Seifert, a tropospheric researcher at the Leibniz Institute in Germany, a large scale temperature spike occurred just before the onset of the Little Ice Age. Seifert does not think global temperatures are about to crash, but he thinks conditions in Europe are similar enough to the 14th century that historical reconstructions of this medieval heatwave, the Dantean Anomaly, can help us understand what we will face as the world continues to warm.

Extreme 14th Century Droughts May Provide Insight Into Our Climate Change Crisis 

CARLY CASSELLA
9 JANUARY 2021

Scientists are studying a major, once-in-a-century drought from Medieval Europe to better understand how extreme weather events indicate rapid climate changes.

In the years leading up to the Little Ice Age, between 1302 and 1307, many regions on the European continent were facing exceptional heat and drought, according to historical records and data collected from tree rings and sediment cores.

These extreme natural events, while not driven by human emissions, hold similar characteristics to recent weather anomalies, and they could help us better predict the course of modern-day climate change.

“Even if it was a phase of cooling in the Middle Ages and we are now living in a phase of [hu]man-made warming, there could be parallels,” says Patric Seifert, a tropospheric researcher at the Leibniz Institute in Germany.

“The transitional period between two climate phases could be characterized by smaller temperature differences between the latitudes and cause longer-lasting large-scale weather patterns, which could explain an increase in extreme events.“

Very Inconvenient Alps Glacier History…Top Glaciologists: Alps Were Ice-Free 6000 Years Ago

by C. Rotter, Jan 7, 2021 in WUWT


Alps ice-free…6000 years ago, when CO2 was much lower than today’s levels.

Dr. Sebastian Lüning earlier today released his latest Klimaschau report, No. 6. In the first part he looks at glaciers in the Alps over the course of much the Holocene.

See the video

It turns out that Most of the Alps were ice-free 6000 years ago, glaciologists have discovered.

In his video, the German geologist presents a new paper authored by glaciologists Bohleber et al, 2020 of the Austrian Academy of Science. The Austrian-Swiss team discovered from ice cores that the 3500-meter high Weißseespitze summit was ice free 5900 years ago.

Much warmer in the early Holocene

Lüning next shows why the Alps were ice-free 6000 years ago by using a chart by Heiri et al 2015, which shows it was some 2°C warmer than today.

More food for Polar Bears: Arctic report card 2020 highlights the huge benefit of less summer sea ice

by Polar Bear Science, Jan 8, 2021 in WUWT


As well as summarizing sea ice changes, NOAA’s 2020 Arctic Report Card features two reports that document the biggest advantage of much less summer sea ice than there was before 2003: increased primary productivity. Being at the top of the Arctic food chain, polar bears have been beneficiaries of this phenomenon because the Arctic marine mammals they depend on for food – seals, walrus and bowhead whales – have been thriving despite less ice in summer.

In the sea ice chapter (Perovich et al. 2020), my favourite of all the figures published is the graph of September vs. March sea ice (above). As you can see, March ice extent has been virtually flat (no declining trend) since 2004. And as the graph below shows, September extent has been without a trend since 2007, as NSIDC ice expert Walt Meier demonstrated last year (see below): it doesn’t take much imagination to see that the value for 2020 from the graph above (the second-lowest after 2012) hasn’t changed the flat-trend line.

CITY OF BEIJING JUST RECORDED ITS COLDEST TEMPERATURE SINCE 1966

by Cap Allon, Jan 7, 2021 in Electroverse


The mercury in China’s capital Beijing plunged to -19.6C (-3.3F) on Thursday morning, January 7 as the powerful Arctic air mass currently gripping the majority of Asia intensified further.

The reading marked the capital’s coldest temperature since 1966 (solar minimum of cycle 19), in record-books dating back to 1912.

Furthermore, 10 out the 20 national-level meteorological stations in Beijing registered their lowest-ever early-January temperatures Thursday morning.

Blue alerts remain in effect across much of China as record low temperature and heavy snow are forecast to linger, at least until the weekend.

 

The intense cold wave began in mid-December, and is the result of Arctic air spilling down over the Asian continent (see low solar activity and meridional jet stream). Many all-time cold records have fallen across China of late…

See also : LNG Prices hit Record Highs as Severe Cold Intensifies across Asia and Europe

Climate Change Causation: Was The Medieval Warm Period ‘Regional?’

by F. Menton, Jan 5, 2021 in ClimateChangeDispatch


Some commenters yesterday noted that the climate establishment has not just completely ignored the threat to their orthodoxy posed by the Medieval Warm Period and other similarly-warm pre-human-emissions eras.

Initially, there was a recognition that this issue could be important, and there was definitely some attempt to deal with it.

However, over time, the accumulation of evidence, particularly as to the existence Medieval Warm Period as a global phenomenon, gradually became overwhelming.

So — in the face of evidence that, under the normal precepts of the scientific method, would be deemed to invalidate the hypothesis that only human CO2 emissions could be causing current warming — how can the orthodoxy be kept alive?

The answer, almost entirely, has been to resort to the hand-waving of “detection and attribution” studies, and hope nobody notices. And, to a remarkable extent, nobody notices.

Readers may be interested in a short history of this issue.

See also  A prequel to the Dantean Anomaly: the precipitation seesaw and droughts of 1302 to 1307 in Europe

La fin du réchauffement… Pas du changement climatique!

by B. Van Vliet-Lanoë, Jan 1, 2021 in ScienceClimatEnergie


Un hiver froid s’annonce : le premier d’une série qui devrait durer au moins jusqu’en 2053 (Youssef et al., 2009 ; Zharkova et al.  2015 ; Van Vliet, 2019), période où les médias nous assènent une disparition de la banquise estivale, des ours polaires et des phoques ! Ceci est favorisé par l’activité solaire réduite depuis et le minimum solaire actuel (Fig.1). Le cycle solaire suivant (n°25) devrait aussi être faible. Nous y sommes entrés sans un Minimum d’activité aussi profond que celui Dalton (1790-1830) qui a présidé à la « Bérézina ».

 

Fig. 1: Intensité des cycles solaires depuis 1975 et la prédiction du cycle 25 (calculés avec le nombre de taches solaires  2018 * ANRPFD ).  B) évolution de l’extension en km2 des banquises arctique et antarctique depuis 1978 par rapport à la déviation standard 1981-2010 (NSDIC).

Number Of Global Wild Fires Trending Down Since 2003. Northern Ocean Heat Content Drops Since 2010


In his latest video the veteran geologist looks at wild fires worldwide and the CO2 they emit. He reports that both have been decreasing.

Citing the results of the European Copernicus satellite atmosphere monitoring service (CAMS), total wildfires globally have fallen steadily, along with their corresponding CO2 emissions:

UAH Global Temperature Update for December 2020: +0.27 deg. C

by R. Spencer, Jan 2, 2020 in WUWT


The Version 6.0 global average lower tropospheric temperature (LT) anomaly for December, 2020 was +0.27 deg. C, down substantially from the November, 2020 value of +0.53 deg. C.For comparison, the CDAS global surface temperature anomaly for the last 30 days at Weatherbell.com was +0.31 deg. C.

2020 ended as the 2nd warmest year in the 42-year satellite tropospheric temperature record at +0.49 deg. C, behind the 2016 value of +0.53 deg. C.

Cooling in December was largest over land, with 1-month drop of 0.60 deg. C, which is the 6th largest drop out of 504 months. This is likely the result of the La Nina now in progress.

The linear warming trend since January, 1979 remains at +0.14 C/decade (+0.12 C/decade over the global-averaged oceans, and +0.18 C/decade over global-averaged land).

 

The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for December, 2020 should be available within the next few days here.

The global and regional monthly anomalies for the various atmospheric layers we monitor should be available in the next few days at the following locations:

Lower Troposphere: http://vortex.nsstc.uah.edu/data/msu/v6.0/tlt/uahncdc_lt_6.0.txt
Mid-Troposphere: http://vortex.nsstc.uah.edu/data/msu/v6.0/tmt/uahncdc_mt_6.0.txt
Tropopause: http://vortex.nsstc.uah.edu/data/msu/v6.0/ttp/uahncdc_tp_6.0.txt
Lower Stratosphere: http://vortex.nsstc.uah.edu/data/msu/v6.0/tls/uahncdc_ls_6.0.txt

A New Year’s Look At WUWT

by  W. Essenbach, Dec 31, 2020 in WUWT


 

Today, as the result of a series of wrong turns and bad choices, I ended up at the Wikipedia entry for Watts Up With That. It says:

Watts Up With That? (WUWT) is a blog promoting climate change denial that was created by Anthony Watts in 2006.  

The blog predominantly discusses climate issues with a focus on anthropogenic climate change, generally accommodating beliefs that are in opposition to the scientific consensus on climate change. 

Appalled by the misrepresentations in that, I thought I might comment on them.

First, the blog doesn’t “promote climate change denial”. I always laugh when I read about “denial” because none of the authors of such nonsense ever get around to telling us exactly what we’re supposed to be “denying”. Me, I deny nothing. I disagree with some of the revealed wisdom of those who believe in “consensus science” but that’s a very different thing. And for those who would like a full explanation of why “consensus” has nothing to do with science, let me recommend a wonderful paper entitled AliensCause Global Warming.

The real misunderstanding, however, is that WUWT doesn’t “promote” anything. Instead, it serves a very different purpose. Let me explain what WUWT really is, which will require a bit of a digression. But then if you know me, you’ll know that I’m susceptible to being sidetractored …

The Middle East Doubles Down on Oil and Gas As the UN Warns of “Climate Emergency”

by T. Doshi, Dec 31, 2020 in WUWT


At the virtual “Climate Ambition Summit” co-hosted by the UN and UK and attended by over 70 world leaders on December 12th, Secretary-General António Guterres issued a stark warning: the world is facing a catastrophe ahead as it is on track to warm by more than 30 C by the end of the century “unless all countries declare climate emergency”. He expressed disappointment at the summit that the G-20 countries are “spending 50% more in their stimulus and rescue packages on sectors linked to fossil fuel production and consumption than on low carbon energy…This is unacceptable”.

The Secretary-General asked earnestly “Can anybody still deny we are facing a dramatic emergency”? The question poses the vast gulf between the policy positions of key Western governments and the oil and gas producers in the Middle East. For the Middle East hydrocarbon producers hit by the ‘double whammy’ of sharply reduced oil and gas price – the mainstay of government revenues — and the impact of Covid-19 lockdowns on domestic economic activity, the strategy for national survival is clear and could not be more opposed to the UN Secretary-General’s: sharply increasing the pace of monetizing the oil and gas reserves that their countries are blessed with.

Middle East To Supply More Oil And Gas

Within two weeks of the UN summit, Saudi Arabia’s energy minister announced on December 27th  the discovery of four new oil and gas fields, including unconventional resources. The discoveries will boost the country’s plans to increase its maximum sustained crude production capacity from the current 12 million b/d to 13 million b/d as well as developing its gas resources to free up more oil for export instead of burning it for power generation.

Egg on Their Faces: 10 Climate Alarmist Predictions for 2020 That Went Horribly Wrong

by T. O’Neil, Dec 28, 2020, in PJMedia


Long before Beto O’Rourke claimed the world only had 10 years left for humans to act against climate change, alarmists had spent decades predicting one doomsday scenario after another, each of which stubbornly failed to materialize. It seems climate armageddon has taken a permanent sabbatical.

Many of those doomsday predictions specifically mentioned the annus horribilus of 2020. Those predictions also failed, some rather spectacularly.

Steve Milloy, a former Trump/Pence EPA transition team member and founder of JunkScience.com, compiled ten climate predictions for 2020 that fell far off the mark.

1. Average global temperature up 3 degrees Celsius

10. Glaciers gone at Glacier National Park

In March 2009, U.S. Geological Survey ecologist Daniel Fagre predicted that the glaciers in Montana’s Glacier National Park would disappear by 2020.

New Climate Models (CMIP6) Offer No Improvement, Model Discrepancies As Large As The Last Version (CMIP5)

by K. Richard, Dec 24, 2020 in NoTricksZone


The “unsatisfactorily large” magnitude of the discrepancies between models in estimating the various radiative contributions to Earth’s energy imbalance serves to undermine confidence that CO2’s small impact could even be detected amid all the uncertainty.

Scientists have engaged in offering their educated guesses, or estimates, of cloud radiative effects for decades.

In the latest models, CMIP6, the top of atmosphere (TOA) net cloud radiative effects (CRE) when considering clouds’ longwave and shortwave combined impact is somewhere between -17 W/m² and -31 W/m² (Wild, 2020). That’s a 14 W/m²spread in CRE modeling.

The discrepancy range between modeled estimates for downward longwave clear-sky radiation is 22.5 W/m². This is the component where CO2’s underwhelming 0.2 W/m² per decade impact (Feldman et al., 2015) is manifested. Modeling discrepancies are thus more than 100 times larger than CO2’s forcing contribution over a 10-year period.

ELEVEN YEARS AGO TODAY AL GORE PREDICTED THE NORTH POLE WOULD BE COMPLETELY ICE FREE IN FIVE YEARSp

by Cap Allon, Dec 13, 2020 in Electroverse


On December 13 & 14, 2009, professor, prophet, and soothsayer Al Gore predicted the North Polar Ice Cap could be completely ice free within the next five to seven years.

 

Gore made his prediction at COP15 Copenhagen which ran from Dec 7 – Dec 18, 2009, where he repeatedly referenced “state-of-the-art” computer modeling to suggest that the north polar ice cap may lose all of its ice by 2014.

“Some of the models suggest that there is a 75 percent chance that the entire north polar ice cap, during some of the summer months, could be completely ice-free within the next five to seven years,” Gore claimed.

“Join me in asking president Obama and the US Senate to set a deadline of 22 April for final action in the US Senate,” he said. “I do not believe we can wait till next November or December.”

The Guardian wrote on Dec 16, 2009 in an article entitled “Al Gore rallies the troops in Copenhagen“:

[Gore] kept up the pace by calling for the international community to sign up to a fully fledged climate change treaty by July 2010 – and then announcing that Mexico was prepared to host a deal-making summit.

He scolded rich countries for demanding the developing world offer evidence of emissions cuts while at the same time trying to inflate the funds they were prepared to offer poor countries to deal with climate change. And he was just as tough on activists who have embraced him as a hero, demanding they set aside their pride and their principles and embrace a deal – no matter how imperfect. He said he recognized their frustration with the glacial pace of negotiations. He agreed that cap-and-trade schemes to cut carbon emissions were an imperfect solution – Gore confessed to favoring a carbon tax – but the current efforts for a deal were the best prospect of avoiding catastrophic climate change.

And there was no trace of sympathy for opponents of action on climate change. Gore began with a brief run-through of the latest science on melting of the Arctic ice cap, evidence he said “only reckless fools would ignore.”

2020 Review: Observational And Modeling Studies Show Temperature Falls As CO2 Rises

by K. Richard, Dec 28, 2020 in NoTricksZone


A 2020 observational study (Zhang et al., 2020) determined “temperatures of atmospheric air with substantially higher CO2 concentration (ranging from 3200 ppm to 16,900 ppm) were lower than that with the lower CO2 concentration (480 ppm)” and a 2020 modeling study (Drotos et al., 2020) assessed that when CO2 goes beyond 4 times preindustrial – 1,120 ppm – “climate sensitivity decreases to nearly zero” because the climate cyclically cools by 10 K.

So the science is settled, right?

 

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