Climate alarmists foiled: No U.S. warming since 2005

Somehow this apparently innocuous non-problem has to be hyped up into a crisis of epic proportions. To help achieve this, an army of climate spin doctors is always on hand to attempt the never-ending task of blaming humans for any kind of unpleasant weather.

When American climate alarmists claim to have witnessed the effects of global warming, they must be referring to a time beyond 14 years ago, says James Taylor @ RealClear Energy.

That is because there has been no warming in the United States since at least 2005, according to updated data from the National Oceanic and Atmospheric Administration (NOAA).

In January 2005, NOAA began recording temperatures at its newly built U.S. Climate Reference Network (USCRN). USCRN includes 114 pristinely maintained temperature stations spaced relatively uniformly across the lower 48 states.

Roy Spencer – July 2019 was not the warmest on record

Image credit: livescience.com

A way of getting around some of the questionable data manipulations in vogue at present is proposed. Whether it would appeal to the ‘offenders’, so to speak, is another matter.

July 2019 was probably the 4th warmest of the last 41 years, writes Dr. Roy Spencer.

Global “reanalysis” datasets need to start being used for monitoring of global surface temperatures.

We are now seeing news reports (e.g. CNN, BBC, Reuters) that July 2019 was the hottest month on record for global average surface air temperatures.

One would think that the very best data would be used to make this assessment. After all, it comes from official government sources (such as NOAA, and the World Meteorological Organization [WMO]).

But current official pronouncements of global temperature records come from a fairly limited and error-prone array of thermometers which were never intended to measure global temperature trends.

UHI May Account For Half Of Climate Warming In China

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Whether the urban heat island effect is in fact warming ‘the climate’ is debatable, but in a propaganda war it can be made to seem so. In any case this needs as wide a coverage as possible, to offset at least some of the alarmist spin about supposed man-made warming that’s pushed down everyone’s throat on a daily basis.

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

A new study by Nicola Scafetta shows that a considerable percentage of China’s global warming from 1940 to today is due to the phenomenon of urbanization. However, the models mistakenly associated this same warming to anthropogenic forcing:

https://www.sciencedirect.com/science/article/pii/S092181811930102X?dgcid=author

Near-surface temperature records show that China warmed by about 0.8 °C from 1950 to 2010. However, there exists an ongoing debate about whether this warming might have been partially due to urbanization bias. In fact, homogenization approaches may be inefficient in densely populated provinces that have experienced a significant urban development since the 1940s. This paper aims to complement previous research on the topic by showing that an alternative approach based on the analysis of the divergence between the minimum (Tmin) and maximum (Tmax) near-surface temperature records since the 1940s could be useful to clarify the issue because urban heat island (UHI) effects stress the warming of nocturnal temperatures…

View original post 228 more words

Chinese UHI study finds 0.34C/century inflation effect on average temperature estimate.

New study published by Springer today makes interesting reading. Phil Jones’ ears will be burning brightly.

Abstract:
Historical temperature records are often partially biased by the urban heat island (UHI) effect. However, the exact magnitude of these biases is an ongoing, controversial scientific question, especially in regions like China where urbanization has greatly increased in recent decades. Previous studies have mainly used statistical information and selected static population targets, or urban areas in a particular year, to classify urban-rural stations and estimate the influence of urbanization on observed warming trends. However, there is a lack of consideration for the dynamic processes of urbanization. The Beijing-Tianjin-Hebei (BTH), Yangtze River Delta (YRD), and Pearl River Delta (PRD) are three major urban agglomerations in China which were selected to investigate the spatiotemporal heterogeneity of urban expansion effects on observed warming trends in this study. Based on remote sensing (RS) data, urban area expansion processes were taken into consideration and the relationship between urban expansion rates and warming trends was investigated using data from 975 meteorological stations throughout China.

Urban heat island effects depend on a city’s layout

Image credit: metlink.org

One finding was ‘that in the state of Florida alone urban heat island effects cause an estimated $400 million in excess costs for air conditioning’. Of course in somewhere cold like Alaska such effects would likely be beneficial.

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

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, says MIT News.

Temperature variation at Heathrow over the past year

This article is part of preparing the way for later revelations about instrumentation defects.

Figure 1 (upper), Figure 2 (lower) computed mean insolation for horizontal surface at this exact location and weather parameters, no cloud.

Figure 1 (upper), Experimental work[1] showing nearly daily temperature variation from expected, specifically designed to exclude diurnal but include detail variation at the fastest scale feasible. Time graticule at 10 days, data points at 12 hours. Surprisingly the July 1st hot period has vanished. Plots of other sites show a similar effect. The most frequent warm and cool periods of weather are brief and readily seen.

This computation will produce different values from the mean values computed from thermometer minimum and maximum data because data shape at other times is taken into account, min/max does not. The filter used is also windowed, leakage is negligible.

Quay Valley: California’s solar powered green dream

A five-mile “Hyperloop” test project is planned for Quay Valley

Couldn’t see anything about energy storage in this report, so we don’t know where the power is supposed to come from at night when solar has stopped working. Maybe it’s in the small print somewhere. More about the hyperloop here.

Roy Higgs reports:
While California’s verdant Central Valley is the fastest growing area in the state, the entire population of the 22,500-square-mile region is a comparatively modest 6.5 million people — Los Angeles County alone boasts over 50% more residents. However, this single region, which is responsible for producing 25% of all of the food consumed in the United States, is expected to absorb many of the 10 million people the state is projected to grow by over the next few decades. It is also home to one of the most ambitious and distinctive new developments in modern American history: Quay Valley.

Australians cool Melbourne

Mr Trewin also noted that the Bureau had recently changed its Melbourne monitoring site from the Royal Society of Victoria on La Trobe Street in the city to Olympic Park, near Rod Laver Arena. Maximum temperatures recorded at the new site were on average 1.2 degrees cooler, particularly on cool days, because air coming from the south and west was travelling over parklands rather than the through the city.

— http://www.theage.com.au/victoria/melbourne-weather-summer-2015-still-hot-just-last-year-was-hotter-20150119-12tbhi.html

h/t to handjive at notricks

Head image from an article by Anthony Watts at Steve McIntyre’s ClimateAudit 2007 article 6 years ago. (I’ve add the red circles)

BOM report it here, no mention of why [wrong, see comment by jdmcl]. Above is how BOM show the station.

Even rainfall data will be wrong with those tall nearby structures and fences.

The Age reported the closure here. No mention of why.

The aircon effect

Air conditioning is standard
[image credit: BBC]

Real man-made warming, just for a change…

Some US cities are getting warmer at night due to increased use of air conditioning that expels warm air from buildings.

Of course this is the classic positive feedback loop. As more warm air is expelled, the temperature rises, leading to more people using more aircon to cool down again – and so on.

Roger Andrews: Urban Heat Islands, islets and archipelagos

This is an article by Roger Andrews.

A few years ago I did some work on urban heat islands and I’m taking the opportunity to document the results. [note 1]

Figure 1

One of the problems with urban heat islands is a lack of information on how large they are. Available data consist of temperature profiles across an idealized metro area, IR satellite images, maps showing temperatures on a summer afternoon or a winter morning or comparisons of temperature gradients at urban stations with surrounding rural stations. But there are no maps, or at least none that I could find, that plot absolute mean temperatures in and around a UHI. So I drew some.

Figure 1 shows the world’s largest UHI – Los Angeles, California, metro area