Archives par mot-clé : Temperature

climate-debate

The Modern Warm Period Delimited

by David Archibald, March 10, 2018 on WUWT

This recent post discussed the end of the Modern Warm Period and the year that global cooling began. That post was inspired by a comment to a post on WUWT six to eight years ago to the effect that climate is controlled by the Sun’s magnetic flux – no need to worry about much else. The comment seemed to come from a warmer scientist – they are well funded, have plenty of time on their hands, some are smart and idle curiosity would get a few looking into what controls climate. The results would not be published of course. To paraphrase Mussolini, everything within the narrative, nothing outside the narrative, nothing against the narrative. If the Sun’s magnetic flux controls climate, you don’t have to worry about what goes on under the hood – the effect of EUV on the NAO, the GCR flux, the F10.7 flux, any other flux apart from the magnetic flux (…)

climate-debate

The Source Of The Heat

by W. Eschenbach, March 9, 2018 in WUWT

I’m sure you can see the problem with Dr. Judith’s question—temperatures can rise without ANY new sources of heat or ANY change in existing sources of heat.

For example, regarding the climate system, every year there is more and more oil that goes into the ocean. This oil floats on the surface in a monomolecular layer, and it reduces both conduction and evaporation. As a result, the oceans end up slightly warmer than they would be without the oil … where is Dr. Judith’s mysterious “source of heat” supposedly driving that change?

Here’s another example … (…)

better to know...?, climate-debate, press and newspapers

Scientists Admit We Need Better Thermometers To Measure Climate Change

by M. Bastach, March 3, 2018 in DailyCaller

A group of prominent scientists are calling for a global network of advanced weather stations that don’t need to go through controversial data adjustments, and it’s vindication for global warming skeptics.

Seventeen climate scientists co-authored a research article published in the International Journal of Climatology calling for a global climate station network modeled after the United States Climate Reference Network (USCRN) to use as a baseline for data quality.

biology+acidification, climate and geology, climate-debate

A new but unbelievable climate proxy – plant leaf wax

by University of Birmingham, March 2, 2018, in WUWT

As the Earth’s surface and atmosphere warm, the amount of moisture – water vapour – in the atmosphere will increase. Understanding the size of this increase is important for predicting future climates as water vapour is a significant greenhouse gas. Atmospheric moisture content also influences the patterns and intensity of rainfall events.

The relationship between temperature and moisture content can be explored by the study of intervals in Earth’s history when climates where significantly warmer than those seen in modern times, which necessitates a method for estimating ancient atmospheric moisture content.

climate-debate

A 1D Model of Global Temperature Changes, 1880-2017: Low Climate Sensitivity (and More)

by Dr Roy Spencer, February 22, 2018 in GlobalWarming

UPDATE(2/23/18): The previous version of this post had improper latitude bounds for the HadCRUT4 Tsfc data. I’ve rerun the results… the conclusions remain the same. I have also added proof that ENSO is accompanied by its own radiative forcing, a controversial claim, which allows it to cause multi-decadal climate change. In simple terms, this is clear evidence the climate system can cause its own, natural, internally-generated climate changes. This is partly what has caused recent warming, and the climate modelling community has assumed it was all human-caused.

climate-debate

Arctic Alarmists Hit New Records Of Hysteria

by P. Homewood, February 28, 2018 in NotaLotofPeopleKnowThat

 

 (…)

During the 1930s and 40s, and in earlier parts of the cycle, winters and spring were much warmer than, for instance, the 1960s and 70s. And, again, we see that those warmer decades were just as warm as recently.

It is these two seasons that have largely driven the annual changes.

In other words, the warmer winters we now commonly see in the Arctic are nothing new at all. They only appear unusual because we have started looking at data since 1954.

(…)

climate-debate

Study: city street & building layout determine intensity of the Urban Heat Island effect

by A. Watts, February 23, 2018 in WUWT

How cities heat up
The way streets and buildings are arranged makes a big difference in how heat builds up, study shows

CAMBRIDGE, Mass. – The arrangement of a city’s streets and buildings plays a crucial role in the local urban heat island effect, which causes cities to be hotter than their surroundings, researchers have found. The new finding could provide city planners and officials with new ways to influence those effects.

Some cities, such as New York and Chicago, are laid out on a precise grid, like the atoms in a crystal, while others such as Boston or London are arranged more chaotically, like the disordered atoms in a liquid or glass. The researchers found that the “crystalline” cities had a far greater buildup of heat compared to their surroundings than did the “glass-like” ones.

better to know...?, climate-debate

Russian Cold Shot Set To Shock-Freeze Europe …Cold Temperatures…High Winds…Homeless At Risk

by P. Gosselin, February 23, 2018 in NoTricksZone

A vicious cold blast is about to invade Europe from the Russian Front and shock freeze the continent.

Interestingly some people – meteorologists among them – have been poking fun at the “hype” or even have blasted media outlets and other private meteorologists for “sensationalizing” the forecast Cold Beast from the East.

Sure, a number of locations over Germany for example may not even see temperatures drop below -10°C. What’s the big deal? It’s winter after all, they are saying. Just put on an extra coat. Some of these critics have even called the loud warnings of the Siberian cold “shrill, dumbass, click-baiting headlines“.

climate-debate

IT’S-THE-SUN Climate Science Steamrolls Into 2018

by K. Richard, February 22, 2018 in NoTricksZone

According to the United Nations Intergovernmental Panel on Climate Change (UN-IPCC) and computer modeling, the Sun’s role in modern-era climate change checks in at somewhere slightly above nothing.

And yet it is increasingly evident that more and more scientists across the globe do not take the position that the Sun’s influence on climate change is negligible.

In 2016 and 2017, for example, over 250 papers (see here and here) linking the Sun to climate changes were published in scientific journals.

climate-debate

The Long Winter Of 2017/18…Numerous Records Set As Ferocious Cold And Snow Batter Northern Hemisphere

by P. Gosselin, February 20, 2018 in NoTricksZone

The long term forecast for Europe, where it is already colder than normal, shows temperatures plummeting to near -20°C in parts of Central Europe by early next week, extending what has been already a brutal winter.

Europeans longing for spring will just have to be patient for awhile. Indeed this winter has been a harsh one across the northern hemisphere with record cold temperatures being set from Siberia to North America to Japan. Also a number of places have seen record snowfalls.

The European Alps have had one of the snowiest winters in years as snow continues to pile up meters high.

Long list of harsh winter events (…)

climate-debate

NOAA Continue To Pump Out Arctic Lies

by P. Homewood, February 21, 2018 in NotaLotofPeopleKnowThat

The Arctic Ocean once froze reliably every year. Those days are over.

Arctic sea ice extent has been measured by satellites since the 1970s. And scientists can sample ice cores, permafrost records, and tree rings to make some assumptions about the sea ice extent going back 1,500 years. And when you put that all on a chart, well, it looks a little scary (…)

climate-debate

BOOM: Global land use change responsible for a significant portion of global warming says study

by A. Watts, February 20, 2018 in WUWT

From the EUROPEAN COMMISSION JOINT RESEARCH CENTRE and the “Dr. Roger Pielke Sr. was right” department. I suspect a whole bunch of climate models that don’t take this into consideration, and think CO2 is the dominant climate driver, are going to need to be revised.

Land use change has warmed the Earth’s surface

Natural ecosystems play a crucial role in helping combat climate change, air pollution and soil erosion. A new study by a team of researchers from the Joint Research Centre, the European Commission’s science and knowledge service, sheds light on another, less well-known aspect of how these ecosystems, and forests in particular, can protect our planet against global warming.

climate-debate

New Paper: 1,407 Contiguous U.S. Temperature Stations Reveal NO WARMING TREND During 1901-2015

by K. Richard, February 19, 2018 in NoTricksZone

The Warming ‘Hole’ Myth

Non-Warming Regions Are More Rule Than Exception 

Earlier this month, the authors of a new paper (Partridge et al., 2018) published in Geophysical Research Letters promulgated the term “warming hole” to describe the cooling temperatures gripping most of the Eastern half of the United States from the late 1950s through 2015

climate-debate

Another AGW Epic Fail: New Paper Finds Appalachians Have Been Dramatically COOLING Since 1910

by Eck, February 15, 2018 in K. Richard NoTricksZone

A new scientific study says surface temperatures in the Northeastern U.S. (Appalachian Mountains) have undergone a significant long-term cooling trend since the early 20th century, complicating the detection of a clear anthropogenic global warming (AGW) signal for the region.

According to Eck (2018), the two coldest Appalachian winters since 1910 were recorded in recent years (2009-’10 and 2010-’11), and 9 of the 10 warmest winters occurred prior to 1960.

In the early 1930s, Appalachian winters were 4.7°C warmer than they have been during the last 30 years (1987-2017).

climate-debate

Arctic chill at 85F below zero – So cold, Eskimos advised to stay inside!

by A. Watts, February 12, 2018 in WUWT

Arctic Weather Brrrrreaking Records

Rankin Inlet, Nunavut gets cold in the winter. Located on the northwestern shore of the Hudson Bay at 62 degrees north and between Chesterfield Inlet and Arviat, the town is definitely in a remote yet exposed region. Weather is just a part of life and recently the weather has been colder than cold.

climate-debate

A never before western published paleoclimate study from China suggests warmer temperatures in the past

by A. Watts, February 11, 2018 in WUWT

Preliminary Conclusions:

1. During the first 2000 years of our 5000-year civilization, most of the time, the annual average temperature was 2ºC higher than now. The temperature in January was 3-5ºC higher than now.

2. From then on, there was a series of temperature fluctuations. The lowest temperatures occurred in AD 1000, 400, 1200, and 1700. The range of fluctuation was 1-2ºC.

3. In every 400-800 period, a smaller cycle lasting 50 to 100 years can be detected with a temperature range of 0.5 -1ºC.

4. During the above cycles, it seems that any coldest period started from the Pacific coast of East Asia. The cold waves then moved westward to Europe and the Atlantic coasts. And at the same time, there were also trends from the North to the South.

climate-debate

Forecast for Solar Cycle 25

by J.A. Marusek, February 2018, in WUWT

The sun is the natural source of heat and light for our planet. Without our sun, the earth would be a cold dead planet adrift in space. But the sun is not constant. It changes and these subtle changes affect the Earth’s climate and weather.

At the end of solar cycle 23, sunspot activity declined to a level not seen since the year 1913. [Comparing Yearly Mean Total Sunspot Numbers1]

The following was observed during the solar cycle 24: (…)

climate-debate

Maunder Minimum & The CET

by P Homewood, February 10, 2018 in NotaLotofPeopleKnowThat

As mentioned yesterday, scientists now believe we could be heading into a 50 year period of reduced solar activity similar to what happened in the mid-17th century, which could lead to a drop in global temperatures of “several tenths of a degree Celsius”.

 As has been pointed out, climate is a far more complex matter than climate scientists admit, and one about which we still know very little.

Whether a Maunder-like Minimum will happen again in the next few years, and whether it will have the effect claimed, remain to be seen.

But there is considerable evidence that the Maunder Minimum did coincide with a sharp fall in temperatures across the NH, as NASA show above.

See also here

better to know...?

DO-IT-YOURSELF TEMPERATURE RECONSTRUCTION

by M.  Chase, February 2, 2018 in WUWT

This article describes a simple but effective procedure for regional average temperature reconstruction, a procedure that you, yes you dear reader, can fully understand and, if you have some elementary programming skills, can implement.

To aid readability, and to avoid the risk of getting it wrong, no attempt is made in the article to give proper attribution to previous work of others, but a link is provided at the end to where a list of references can be found.

(…)