Archives par mot-clé : Temperature

Tendencies, variability and persistence of sea surface temperature anomalies

by Bulgin et al., May 14, 2020 in Nature OPEN ACCESS


Abstract

Quantifying global trends and variability in sea surface temperature (SST) is of fundamental importance to understanding changes in the Earth’s climate. One approach to observing SST is via remote sensing. Here we use a 37-year gap-filled, daily-mean analysis of satellite SSTs to quantify SST trends, variability and persistence between 1981–2018. The global mean warming trend is 0.09 K per decade globally, with 95% of local trends being between −0.1 K and + 0.35 K. Excluding perennial sea-ice regions, the mean warming trend is 0.11 K per decade. After removing the long-term trend we calculate the SST power spectra over different time periods. The maximum variance in the SST power spectra in the equatorial Pacific is 1.9 K2 on 1–5 year timescales, dominated by ENSO processes. In western boundary currents characterised by an intense mesoscale activity, SST power on sub-annual timescales dominates, with a maximum variance of 4.9 K2. Persistence timescales tend to be shorter in the summer hemisphere due to the shallower mixed layer. The median short-term persistence length is 11–14 days, found over 71–79% of the global ocean area, with seasonal variations. The mean global correlation between monthly SST anomalies with a three-month time-lag is 0.35, with statistically significant correlations over 54.0% of the global oceans, and notably in the northern and equatorial Pacific, and the sub-polar gyre south of Greenland. At six months, the mean global SST anomaly correlation falls to 0.18. The satellite data record enables the detailed characterisation of temporal changes in SST over almost four decades.

 …

NOAA Satellite records second largest 2-month temperature drop in history

by Anthony Watts, May 1, 2020 in WUWT


UPDATE: Changed emphasis from Northern Hemisphere extratropics to entire Northern Hemisphere (h/t John Christy)

In April, 2020, the Northern Hemisphere experienced its 2nd largest 2-month drop in temperature in the 497-month satellite record.

The Version 6.0 global average lower tropospheric temperature (LT) anomaly for April, 2020 was +0.38 deg. C, down from the March, 2020 value of +0.48 deg. C.

The Northern Hemisphere temperature anomaly fell from +0.96 deg. C to 0.43 deg. C from February to April, a 0.53 deg. C drop which is the 2nd largest 2-month drop in the 497-month satellite record. The largest 2-month drop was -0.69 deg. C from December 1987 to February 1988.

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

Global Mean Temperature Flattens the Past

by Andy May, May3, 2020 in WUWT


Introduction

There have been recent discussions about ‘flattening the curve’ and some curves are easier to flatten than others. The Pages 2K Consortium calculates global mean temperature in a manner that flattens the long-term trend and makes present day temperatures appear warmer relative to past temperatures. Across the globe, temperature reconstructions show cooling millennial temperature trends with one exception, the Pages 2K global mean.

Millennial Temperature Trends Show Global Cooling

Global mean surface temperature anomalies were recently calculated by the Pages 2K Consortium led by Nuekom, 2019. Their statistical means are a conglomeration of seven different averaging methods for 7000 proxy records over the past 2000 years. The median across all global mean methods is plotted as a dashed line in Figure 1 and compared to Pages 2K’s published regional reconstructions. All means demonstrate similar trends as the median and will be simply be referred to as the global mean(s).

Regional temperature reconstructions are chosen that utilize similar proxy datasets used in the global mean calculation. The Arctic reconstruction by McKay incorporates a balance of proxy records consisting of ice cores, tree rings, lake and marine sediments north of 60 deg N. The Northern Hemisphere (NH) European reconstruction by Luterbacher is tree ring proxy based. And Stenni’s Antarctic reconstruction uses predominantly ice core isotopes.

The Pages 2K global mean appears to be reasonable compared to regional reconstructions from Present through the Little Ice Age (LIA) until about 1250 AD. Although it is difficult to see how the mean compares to regional reconstructions during the Present when using a 1961-1990 baseline as all reconstructions converge creating the “hockey stick” effect. Pre-1250 AD, the global mean appears to parallel NH Europe temperatures largely ignoring the Antarctic.

 

Figure 1: Top graph are surface temperature reconstructions with a 50-year loess filter plotted with Pages 2K global mean of the 7000-member ensemble across all methods. Bottom graph shows linear trends over the past 2000 years.

GLOBAL TEMPERATURES SUFFER SECOND LARGEST TWO MONTH DROP IN RECORDED HISTORY

by Cap Allon, May 6, 2020 in Electroverse


The Temperature of the Global Lower Atmosphere plunged 0.38C through March and April, halving its February above baseline high of 0.76C to 0.38C — the second-largest two-month drop in the UAH temperature dataset.

The largest two month drop remains the 0.69C observed back in 1987. And note how the global average temperature back in 1987 –before both the drop AND the inception of the global warming scare is EXACTLY the same as it is now:

 

A continuation of this sharp downward plunge (seen in March and April, 2020) is highly probable over the coming months (with the odd bump on the way), and we can now consider a reading below baseline by the end of the year “likely”.

For a more in-depth look at the data check out this video from the Oppenheimer Ranch Project:

 

Rural Northern US Stations Showed No Warming – Before NASA Rewrote The Data

by P. Gosselin, May 03, 2020 in NoTricksZone


The northern hemisphere surface temperature was expected to drop substantiallyaccording to NCEP, but this of course will not keep global warming alarmists from sounding the warming alarms.

But a look at the unadjusted data from some rural US stations tells us that there has been no warming.

Today we look at temperature data from NASA of some stations along the northern US with a Brightness Index (BI) of 0, meaning rural locations with no urban heat island effects. We want to see the trend over the past 100 or so years.

Plotted are the USHCN Version 4 versus Version 4 adjusted.

The first plots are the data from Lincoln, Nebraska going back to 1901:

Modest cooling changed to warming. Data: NASA

Note how a modest cooling trend was changed to a warming trend. Very ealy temperatures were cooled by 2°C!

Next we move to the Livingston, Montana station, where here as well a modest cooling trend was transformed into warming by massively adjusting past temperatures downward also by more than 2°C:

Extra warm U.S. winter had nature’s thumbprint on it–Joe Bastardi

by P. Homewood, April 3; 2020 in NotaLotofPeoppleKnowThat


Joe Bastardi explains why this winter has been so mild in the US, but also across N Europe, at CFACT.

Two points:

1) I will make the case for why such winters like this happen

2) I will point out that nowhere in this article did the massive natural physical drivers that far outweigh the effect of CO2, which is only .041% of the atmosphere. Pointedly, of which man is only responsible for  25% and the US only 15% of that total.

I am not going to waste time attacking here, except to say this kind of one-sided journalism and the fact that nowhere did anyone show what I am about to reveal to you, should raise questions of any objective person.

Basically the rules of the game are, if its warm like this winter, its climate change, if it is cold, its climate change. It is typical of everyone gets a trophy in that any answer even if opposite, means you get credit.

I won’t copy the whole article as it is a bit technical, but it can be seen here. However these are the main points Joe raises, starting with the role of El Nino and water vapour:

Water vapor is by far the most important greenhouse gas when it comes to the planetary weather and climate. Meteorologist look at “saturation mixing ratios” which show a correlation of water vapor to temperature. Basically the colder and drier the air mass, the more the introduction of water vapor will lead higher temperatures, there is no place like the arctic to prove this is the case. The cyclically warmed oceans have put more water vapor (and CO2) into the air. When Super El Niño’s go off, the immense amounts dispersed lead to a step up of the temperature. The colder regions leading the way as will be opined on below.

The UAH Global Temperature Dataset at 30 Years: A Look Back at the Early Days

by Dr. Roy Spencer, March 31, 2020 in GlobalWarming


Today (Monday, March 30) is the 30th anniversary of our publication in Science describing the first satellite-based dataset for climate monitoring.

While much has happened in the last 30 years, I thought it might be interesting for people to know what led up to the dataset’s development, and some of the politics and behind-the-scenes happenings in the early days. What follows is in approximate chronological order, and is admittedly from my own perspective. John Christy might have somewhat different recollections of these events.

Some of what follows might surprise you, some of it is humorous, and I also wanted to give credit to some of the other players. Without their help, influence, and foresight, the satellite temperature dataset might never have been developed.

 

Continuer la lecture de The UAH Global Temperature Dataset at 30 Years: A Look Back at the Early Days

Coral tells own tale about El Niño’s past

by Rice University, March 27, 2020 in WUWT


HOUSTON – (March 26, 2020) – There is no longer a need to guess what ocean temperatures were like in the remote tropical Pacific hundreds of years ago. The ancient coral that lived there know all.

A study in Science led by Rice University and Georgia Tech researchers parses the record archived by ancient tropical Pacific coral over the past millennium. That record could help scientists refine their models of how changing conditions in the Pacific, particularly from volcanic eruptions, influence the occurrence of El Niño events, which are major drivers of global climate.

They found the ratio of oxygen isotopes sequestered in coral, an accurate measure of historic ocean temperatures, shows no correlation between estimates of sulfate particles ejected into the atmosphere by tropical volcanic eruptions and El Niño events.

That result could be of particular interest to scientists who suggest seeding the atmosphere with sun-blocking particles may help reverse global warming.

According to Rice climate scientist and primary author Sylvia Dee, previous climate model studies often tie volcanic eruptions, which increase sulfate aerosols in the atmosphere, to increased chances for an El Niño event. But the ability to analyze climate conditions based on oxygen isotopes trapped in fossil corals extends the climatological record in this key region across more than 20 ancient eruptions. Dee said this allows for a more rigorous test of the connection.

“A lot of climate modeling studies show a dynamical connection where volcanic eruptions can initiate El Niño events,” Dee said. “We can run climate models many centuries into the past, simulating volcanic eruptions for the last millennium.

“But the models are just that — models — and the coral record captures reality.”

Coral data that Georgia Tech climate scientist Kim Cobb and her team arduously collected on trips to the Pacific show little connection between known volcanoes and El Niño events over that time. Like tree rings, these paleoclimate archives hold chemical indicators, the oxygen isotopes, of oceanic conditions at the time they formed.

The coral data yields a high-fidelity record with a resolution of less than a month, tracking the El Niño-Southern Oscillation (ENSO) in the heart of the central tropical Pacific.

Climate At A Glance Factchecks–Coral Reefs

by P. Homewood, March 21, 2020 in NotaLotofPeopleKnowThat


Bullet Point Summary:

  • Coral thrive in warm water, not cold water.
  • Recent warming has allowed coral to expand their range poleward, while still thriving near the equator.
  • Coral has existed continuously for the past 40 million years, surviving temperatures and carbon dioxide levels significantly higher than what is occurring today.
  • The primary causes of coral bleaching include oxybenzone (a chemical found in sunscreen), sediment runoff from nearby coastal lands, and cold temperatures like those recorded in 2010 off the Florida coast.
  •  

Short Summary: Coral require warm water, not cold water, to live. Coral cannot live outside of tropical or subtropical waters. (See Figure 1.) As Earth continues to modestly warm, coral are extending their range toward the poles while still thriving at and near the equator. The primary reasons for bleaching events include sediment pollution from nearby coastal lands, chemicals found in sunscreen, and cold temperature events. Coral have existed continuously for the past 40 million years. Coral survived and thrived when temperatures were significantly warmer than they are today.

Figure 1: Coral Reef Locations

Continuer la lecture de Climate At A Glance Factchecks–Coral Reefs

North Atlantic Oscillation

by P. Homewood, March 19, in NotaLotofPeopleKnowThat


If you had not noticed (!), it has been a mild and wet start to the year here in the UK, and also across in NW Europe.

No doubt this will be linked to global warming in due course, but in fact it is simply weather, as the CET chart below proves:

Since the year started, temperatures have consistently been within the normal band. In other the sort of temperatures commonly seen at this time of year.

However, they have also been consistently in the top half of that band, rather than being spread between cold and warm, as would happen most years.

The reason for the weather we have had is, of course, the jet stream, or more precisely the North Atlantic Oscillation (NAO), which has been strongly and stubbornly positive all winter.

The Norwegian Centre for Climate Research CICERO spotted this mild weather coming back in December, and commented on 6th January:

The unusual warm temperatures this winter and forecasts indicating milder winter conditions for January, February and March in Europe are partly due to an atmospheric circulation pattern called the North Atlantic Oscillation, or NAO. This atmospheric circulation pattern explains well the weather we get in Europe, especially in winter.

https://cicero.oslo.no/no/posts/nyheter/unseasonal-temperatures-for-norway#

 

 

Our own Met Office explains the NAO phenomenon:

 

 

Despite Mild Winter, Europe February Mean Temperatures Show No Warming Over Three Decades

by P. Gosselin, March 13, 2020 in NoTricksZone


By Kirye
and Pierre Gosselin

It’s been a particularly mild winter in Europe this year. But that hasn’t changed the long-term trend over the past 30 years.

Now that the February 2020 data have been coming in, we plot the mean February temperatures for some countries in Europe.

Sweden

Three of 5 stations show February mean temperature in Greta Thunberg’s Sweden have had a cooling trend since 1988! The real data will probably make the climate alarmists upset.

More On Earth’s Meaningless Global Temperature, Now And Before

by J. Moseley, March 9, 2020 in ClimateChangeDispatch


Is planet Earth warming, cooling, or staying the same? I often challenge advocates for climate alarmism: what is the temperature of the planet today?

Or we can use any specific day in recent years for which data are available. We cannot know the temperature of the planet thousands or millions of years ago if we cannot even measure it today.

Yes, the question is one single temperature of the entire planet. Not the temperature in Nome, Alaska, or Dallas, Texas, or Sydney, Australia, or in your hometown.

One single temperature reading for the entire globe. To put it that way immediately sounds strange.

But if we don’t have a single temperature reading for the entire planet for today, how can we say if the planet is getting warmer or cooler or not changing at all?

We cannot talk about the temperature in, say, Geneva or London or New York City only. The question is whether the entire planet is getting warmer, not isolated cities.

Some of us have forgotten basic statistics. Some avoided it in school. But most of us are vaguely familiar with the random sampling process used in public opinion surveys.

Calculating Temperatures Without Thermometers

by Tony Heller, March 5, 2020 in RealClimateScience


Over the past 30 years, NOAA has been rapidly losing US thermometers. In 1989, 1,205 stations reported some daily temperatures, but last year only 871 stations reported some daily temperatures.

Thirty-five percent (424) of the stations in 2019 were zombie stations, meaning that NOAA estimated data for all twelve months. This is done even for some of the thermometers which reported at least a little data in 2019.

 

NOAA Relies on ‘Russian Collusion’ to Claim January Was Hottest Month on Record

by Anthony Watts, February 29, 2020 in WUWT


In a report generating substantial media attention this month, the National Oceanic and Atmospheric Administration (NOAA) claimed January 2020 was the hottest January on record. In reality, the claim relies on substantial speculation, dubious reporting methods, and a large, very suspicious, extremely warm reported heat patch covering most of Russia.

The January 2020 Climate Assessment Report, released by NOAA’s National Center for Environmental Information (NCEI), was accompanied by a map showing a giant red menace of extraordinary asserted warmth extending from the Russian border with Poland well into Siberia. Yet, the asserted hot spot appears nowhere else.

 

Figure 1: Map of temperature departure provided by NOAA/NCEII. Note the huge red spot over Russia.

Continuer la lecture de NOAA Relies on ‘Russian Collusion’ to Claim January Was Hottest Month on Record

La péninsule Antarctique se porte bien

by P. Berth, 28 février 2020 in ScienceClimatEnergie


Selon un récent article du Guardian, des scientifiques ont mesuré pour la première fois la température de 20,75°C le 9 février 2020 sur l’île Seymour, une île située au large de la péninsule Antarctique. Cette île comporte la station de mesure Marambio où les relevés ont été réalisés. Bien entendu, cette nouvelle a été reprise par les médias, Greta Thunberg en tête. Cependant, en analysant objectivement la situation vous pourrez constater qu’il n’y a pas lieu de s’alarmer.

1. Localisation de l’île Seymour et température moyenne annuelle

L’île Seymour est située au large de la péninsule Antarctique (Figure 1), la région la plus au nord du continent Antarctique et, quasiment, la seule partie d’Antarctique s’étendant au-delà du cercle polaire.

3. Conclusions

– Pour comprendre ce qu’il se passe dans un jeu de données de température il ne faut pas considérer une seule mesure comme le fait l’article du Guardian; il ne faut pas non plus considérer une seule station de mesure.

– Si l’on désire faire passer des droites parmi les données de température, les plus longues séries disponibles sont celles de la station Orcadas (depuis 1902), qui est quand même assez éloignée de la péninsule Antarctique. On constate alors un réchauffement d’environ + 2°C en 110 ans (la courbe de tendance coupe –5°C en 1900 et –3°C en 2010). Cependant, en considérant des courbes polynomiales dont le coefficient de détermination est meilleur on constate que les températures moyennes chutent depuis les années 2000, comme dans toutes les stations de la péninsule Antarctique présentées dans cet article.

– Les phénomènes naturels suivent rarement des droites. Ils sont généralement cycliques, avec des périodes et amplitudes très variables. Il est donc permis de conclure que la péninsule Antarctique ne se réchauffe pas depuis 25 ans. Ceci est confirmé par d’autres analyses (voir ici et ici) et il est dommage qu’une fois de plus les médias ne fassent pas plus preuve de rigueur et se permettent des raccourcis donnant une information inexacte à 100%. En sont-ils seulement conscients ?

Study: Computer Models Overestimate Observed Arctic Warming

by Craig Idso, February 26, 2020 in ClimateChageDispatch


Paper Reviewed:
Huang, J., Ou, T., Chen, D., Lun, Y. and Zhao, Z. 2019. The amplified Arctic warming in recent decades may have been overestimated by CMIP5 models. Geophysical Research Letters 46: 13,338-12,345.

Policies aimed at protecting humanity and the environment from the potential effects of CO2-induced global warming rely almost entirely upon models predicting large future temperature increases.

But what if those predictions are wrong? What if a comparison between model projections and observations revealed the models are overestimating the amount of warming?

Would climate alarmists admit as much and back away from promoting extreme policies of CO2 emission reductions?

Probably not — at least based upon the recent rhetoric of each of the candidates seeking the Democrat Party’s nomination for President of the United States, all of whom continue to call for the complete elimination of all CO2 emissions from fossil fuel use within the next three decades, or less.

But for non-ideologues who are willing to examine and accept the facts as they are, the recent work of Huang et al. (2019) provides reason enough to pause the crazy CO2 emission-reduction train.

In their study, the five researchers set out to examine how well model projections of Arctic temperatures (poleward of 60°N) compared with good old-fashioned observations.

More specifically, they used a statistical procedure suitable for nonlinear analysis (ensemble empirical mode decomposition) to examine secular Arctic warming over the period 1880-2017.

Observational data utilized in the study were obtained from the HadCRUT4.6 temperature database, whereas model-based temperature projections were derived from simulations from 36 Coupled Model Intercomparison Project Phase 5 (CMIP5) global climate models (GCMs).

Figure 1. Observed and model-predicted rates of nonlinear, secular warming in the Arctic (60-90°N) over the period 1880-2017. The black and red dashed lines indicate the 10th and 90th percentiles for temperature means. Adapted from Huang et al. (2019).

As indicated there, the model-estimated rate of secular warming (the solid red line) increased quite sharply across the 138 year period, rising from a value of around 0°C per decade at the beginning of the record to a value of 0.35°C per decade in the end.

Jan 2020: Coldest ever day in Greenland -65C comes, goes, no one notices

by JoNova, February 2020


The coldest ever day recorded in Greenland stands at -63.3 C  (minus 81 F).  But on January 2nd in 2020, after Greenland suffered a century of global warming, the thermometer at Summit Camp sunk to at least -64.9C. I say, at least, because it may have been even colder. Sharp eyes of Cap Allon at Electroverse saw it hit minus 66C. Ryan Maue also saw it and predicted there would be cold as the Arctic Oscillation broke down.

I sought confirmation at the time (among the Bushfire days in Australia). I looked for any official tweet even, but couldn’t find any. How’s that work — a new all time record for a whole continent for any month of the year, and no one who was paid to care about these things even writes a paragraph?

Good for Paul Homewood, who wrote to the DMI (Danish Met Institute) and has now confirmed that the NOAA GeoSummit  records showed it got down to -64.9 C, an all time record.

THE UN ADMITS THAT THE PARIS CLIMATE DEAL WAS A FRAUD

by Poppallov, February 24, 2020 in Electroverse


In an editorial piece published in the Investor’s Business Daily Saturday 11th February 2017, we are told about a United Nations climate report that environmentalists undoubtedly don’t want anybody to read. It states in plain English “that even if every country abides by the grand promises they made last year in Paris to reduce greenhouse gases, the planet would still be doomed…”

When President Obama hitched America to the Paris accords in 2016, he declared that it was “the moment that we finally decided to save our planet.” And when Trump pulled out of the deal this year, he was berated by legions of environmentalists for killing it.

But it turns out that the Paris accord was little more than a sham that will do nothing to “save the planet.”

According to the latest annual UN report on the “emissions gap,” the Paris agreement will provide only a third of the cuts in greenhouse gas that environmentalists claim is needed to prevent catastrophic warming. If every country involved in those accords abides by their pledges between now and 2030 — which is a dubious proposition — temperatures will still rise by 3 degrees Celsius by 2100. The goal of the Paris agreement was to keep the global temperature increase to under 2 degrees.

The measures submitted included: “Boosting renewable energy’s share to 30%. Pushing electric cars to 15% of new car sales, up from less than 1% today. Doubling mass transit use. Cutting air travel CO2 emissions by 20%. And coming up with $1 trillion for “climate action.”

Central to the report, “phasing out coal consumption … is an indispensable condition for achieving international climate change targets.” That means halting all new coal plants shutting down those currently in use.

Which is quite a big ask, as there are currently 273 gigawatts of coal capacity under construction around the world, and another 570 gigawatts in the pipeline, according to the UN. That’s a 42% increase in global energy production from coal. Which doesn’t consider the 22 coal-fired power stations to be built at 17 locations in Japan to replace their aging nuclear plants. These new installations will on their own produce more carbon dioxide annually than all the passenger cars sold in the United States each year.

So, with all the hype in the media about “climate change” and with NOAA admitting to data manipulation, as well as acknowledging that the climate has been cooling for the past 10 years, when is the UN going to shut-up shop and call an end to this panhandling charade?

Study: Large Part Of 20th-Century Warming Caused By CFCs

by Prof. F. Vahrenholtz, February 20, 2020 in ClimateChaneDispatch


A few days ago, an international research group from the USA, Canada, and Switzerland led by Lorenzo Polvani of Columbia University (New York) published a sensational study in Nature climate change, which attributes a large part of the warming of the 20th century to CFCs (“Substantial twentieth-century Arctic warming caused by ozone-depleting substances“).

Using ten climate models, the researchers calculated the global and Arctic temperature development, once with CFCs (chlorofluorocarbons) in the atmosphere and once without.

According to these models, from 1955 to 2005, global temperatures increase by 0.59°C with CFCs and by 0.39°C without CFCs. One-third of the warming is therefore not caused by CO2 but by the CFCs.

If the remaining warming for CO2 is converted over the five decades, average warming of 0.08°C per decade remains. Not exactly a lot. CFCs have a 19,000-23,000 times stronger forcing than CO2.

Half of Arctic warming due to CFCs

Continuer la lecture de Study: Large Part Of 20th-Century Warming Caused By CFCs

Is “All-Time Antarctic 20.75C Record High Temperature” Just A Sensational Hoax? Station Data Show Only 16C

by P. Gosselin, February 17, 2020 in NoTricksZone


In Germany there have been rumors that the alleged Antarctic Seymour Island “all-time Antarctic record high” of 20.75°C set on February 9th is a hoax – originating by the AFP news agency and then spread by The Guardian.

The alleged 20.75°C was supposedly logged by Brazilian scientists and was supposedly almost a full degree higher than the previous record of 19.8C, taken on Signy Island in January 1982, The Guardian blared with much alarm, citing its own rush job chart.

Currently the WMO is seeking to obtain the actual temperature data for Seymour Island, part of a chain of islands off the Antarctic peninsula.

WMO cites media as source!

The WMO website itself is citing the media as its source, writing: “Media reports say that researchers logged a temperature of 20.75°C. Mr Cerveny cautioned that it is premature to say that Antarctica has exceeded 20°C for the first time.”

Thermometer data show only 16°C!

According to German Facebook site Klima.Wissen here and its readers, the “all-time record high reading” of 20.75°C appears to have its origins from the AFP news agency. It was then picked up by the always climate sensational The Guardian. But now the whole story is beginning to appear as just big sensational hoax.

First, WetterOnline.de here shows that the high temperature on February 9th at the Seymour Island station (Base Murambio) was merely 16°C!

The Rise and Fall of Central England Temperatures; Part 3 2000-2019

by Tony Brown, February 15, 2020 in WUWT


This is the third examination of Central England Temperatures (CET) in a series that commenced in 2015 and which has charted the recent decline in temperatures from their highest values. The two previous articles in this series are referenced here;

The Rise and Fall of Central England Temperatures; Part 1 covering 2000 to 2015

https://judithcurry.com/2015/11/25/the-rise-and-fall-of-central-england-temperature/

The Rise and Fall of Central England Temperatures; Part 2 covering 2000 to 2017

https://wattsupwiththat.com/2018/03/04/the-rise-and-fall-of-central-england-temperatures-help-needed-to-find-missing-data/

When referencing any ‘decline’ we need to put that into context against CET’s overall substantial rise in recent decades. The official CET dataset used in this article, which is compiled by the UK Met office is linked here and shown in Figure A);

https://www.metoffice.gov.uk/hadobs/hadcet/

It should be noted that the values between 1538 and 1658 are my own reconstruction and are not used at all in this current paper.

Note: Weather comprises the day to day events that we all experience. Climate is officially the trend of the weather (often temperature and rainfall) taken over a continuous thirty year period. The two terms have sometimes been used in an interchangeable manner here, when a period of more than a year is being examined.

Figure A

According to the Met office; ‘Since 1974 the data have been adjusted to allow for urban warming: currently a correction of -0.2 °C is applied to mean temperatures.’

Greta’s, The Guardian’s Latest Panic Attack Over Antarctica Record Ignores Cooling Trends Of Recent Decades

by P. Gosselin, February 15, 2020 in NoTricksZone


In her latest panic attack, teenage Swedish climate activist Greta Thunberg – citing the Guardian –  once again appeared to be proclaiming the end of the world was a step closer when she tweeted Antarctica has set a new record high temperature:

 

Two new warm records

According to the Guardian, “The 20.75C logged by Brazilian scientists at Seymour Island on 9 February was almost a full degree higher than the previous record of 19.8C, taken on Signy Island in January 1982.”

That reading, the Guardian reports, follows the February 6 record of 18.3C recorded at the Argentinian research station, Esperanza measured.

As is the case with most alarmists, every warm single datapoint anomaly gets uncritically accepted with open arms as solid evidence of man-made global warming while cold trends get dismissed or downgraded as “natural variability”.

Seymour Island has been cooling for over a quarter century

So we have two recent warm records set at and near the Antarctic peninsula over the past week or so and that means the region there is heating up, alarmists like Greta and the Guardian want us to believe. But what are the real TRENDS there? Do the 2 recent warm records mean the region is heating up.

Looking at official data from NASA, it turns out that warming isn’t true. And because climate is always changing, the temperature in the region in question has also not remained completely steady. The only possibility left? COOLING.

Also here

Climate Crisis Update–England As Warm As 1736 Last Month!

by P. Homewood, February 13, 2020 in NotaLotofPeopleKnowThat


https://www.metoffice.gov.uk/hadobs/hadcet/cet_info_mean.html

It’s been a mild start to the year here in England. In fact, according to the CET, it’s been the 14th warmest January since the start of records in 1659.

No doubt fingers will be pointed at global warming, but as the above chart shows, we have simply had mild weather of the commonly seen before. The difference is that it lasted virtually all month.

Moreover we have had warmer Januaries way back in the past. The warmest was in 1916, followed by 1921, 1796 and 1834.

https://www.metoffice.gov.uk/hadobs/hadcet/mly_cet_mean_sort.txt

Continuer la lecture de Climate Crisis Update–England As Warm As 1736 Last Month!