August 2014 radiative cooling East Anglia, Northern Ireland, South Midlands

August 30, 2014 1 comment

August 2014 there was a meteorological gift of both exceptional conditions and good data. What can be learnt?

Three Met Office sites showed a signature of exponential cooling. This requires clear sky and a calm. Given somewhat limited parameter hourly data the following shows the commonality. The computed terminal conditions are shown later in this article.

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Benson and Santon Downham data has been normalised to Katesbridge[3], which has the least noisy data or the three.

Achieving a close overlay requires taking earth rotation into account, dusk and dawn move relatively both by geographic location and the peculiar movement throughout the year as night length changes, these do not move together [1]. Fractional delay (less that the sample period) was used to equalize diurnal time. (see the two blog articles here)

Dusk appears to be the important factor, a surprising finding, I assume cooling is time from dusk, dawn terminates cooling.

General information, under essentially calm conditions wind drops for a period during the night then reappears just after dawn. (not shown here)

Temperature normalisation defined is for the cold period, not as accurate for Benson where the better site exposure (more open) led to more wind at times.

Read more…

Categories: analysis, temperature, weather

UK outline map and Met Office Datapoint

August 24, 2014 1 comment

I’ve been busy pottering on code as a mindless intermission during house repairs, can only do so much at a time. Argue with a piece of wood or with a computer screen? :-)

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This is a bitmap copy of a map of the UK with markers showing the location of Met Office weather sites with hourly data published via their Datapoint service. Data is under OGL (Open Government Licence) which allows usage. Unfinished work, references are not yet included.

The real file is part of a large PDF (vector format) containing plots for all those stations during a 24 hour period.

Example PDF http://daedalearth.files.wordpress.com/2014/08/uk-2014-08-24-0045.pdf  (1.2MB, work in progress, more to be done)

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Categories: software, weather

Human warming of Great Lakes

August 7, 2014 1 comment

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Image NOAA, click for full size.

I came across the above graphic. On pondering I went huh?

The most eastern (right hand) is Lake Ontario. Is that a mistake, the only one largely ice free 2014, largely clear 1994.

Well…

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Categories: Minder, temperature

Hugin and correction of photographic distortion

August 3, 2014 2 comments

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Superconducting conductors arriving at Fermilab, credits at end.

None of you will know I have history in photography, award winning, newspaper front page, glossy magazine front page, etc., none earth shattering but it was a personal challenge in the film era. Put another way I have an interest from both the art and technical perspective.

I intended producing a minor blog post on Fermilab and the magnet, ideally posts need a good headline photograph, what with copyright and poor technical standards this is often tricky. My own blog, this one, tends to get poor art.

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Lomonosov University and the study of high atmosphere electrical events, satellite planned

August 2, 2014 Leave a comment

A new university satellite is scheduled launch 2015[1]. A web site for the project is available in English

Mikhail Lomonosov (1711 – 1765) helped establish what is now known as Moscow University, decree signed 1755, 250 years ago.

According to Lomonosov’s plan, there were originally three faculties. First all the students acquired a comprehensive knowledge in the field of science and humanities at the Faculty of Philosophy; then they could specialize and continue at the Faculty of Philosophy or join either the Law Faculty or The Faculty of Medicine. Lectures were delivered either in Latin, the language of educated people at the time, or in Russian. [2]

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Aurora drawing

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Atmospheric vertical circulation

Illustrations from a book published 1753. Text, perhaps embellished a little as these things are, “Mikhail Lomonosov – the Pioneer of Russian Science” nevertheless looks a good fellow.

The satellite is named Lononosov.

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Categories: education, History, Satellites

Met Office station location assistance

July 29, 2014 3 comments

I need help in locating a few Met Office meteorological sites as part of a new project part of making reality open to all. In addition any correction of errors or additional information is welcome. For anyone not aware I have past history of extensive unearthing of similar information via a surfacestations project. This is not  an easy to read post, sorry.

The UK Met Office has relatively recently started publishing moderate resolution meteorological data for a subset of all stations via a web based facility called Datapoint.

We get hourly data for 176 stations, a few wind data only, the rest a mixture of full or partial data

WARNING opening this full blog article will display a long list of data. Read more…

Categories: weather

New Paper by McKitrick and Vogelsang comparing models and observations in the tropical troposphere

July 24, 2014 Leave a comment

tchannon:

Looks to be important, more confirmaton of the 1980s shift seen around the world. As I recall Leroux suggested the 1980 step change needed explaining before running off doing projections. Another place to look is FAO and fish population studies, not just the tropics.

Originally posted on Climate Audit:

This is a guest post by Ross McKitrick. Tim Vogelsang and I have a new paper comparing climate models and observations over a 55-year span (1958-2012) in the tropical troposphere. Among other things we show that climate models are inconsistent with the HadAT, RICH and RAOBCORE weather balloon series. In a nutshell, the models not only predict far too much warming, but they potentially get the nature of the change wrong. The models portray a relatively smooth upward trend over the whole span, while the data exhibit a single jump in the late 1970s, with no statistically significant trend either side.

Our paper is called “HAC-Robust Trend Comparisons Among Climate Series With Possible Level Shifts.” It was published in Environmetrics, and is available with Open Access thanks to financial support from CIGI/INET. Data and code are here and in the paper’s SI.

View original 2,831 more words

Categories: Uncategorized

More Luling

June 30, 2014 Leave a comment

Following on from yesterday where Paul Homewood picked up on a comment I made on his blog see Luling Keeps Changing June 29, 2014, I took a look today at the NCDC data.

Maybe I picked up the wrong files, seems surreal.

I am now going to be precise step by step.

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Categories: analysis, temperature

Luling, Texas weather station

June 28, 2014 1 comment

A recent saga started by Paul Homewood over apparently excessive “homogenisation” for one of a vast number of US volunteer run weather stations led me to take a look. I’ll link Paul’s blog articles as an appendix.

The station is at Luling Foundation Farm, an agricultural station set up prior to WWII. The weather data runs from 1949.

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Luling station house looking south

They have a good web site which gives a history, starting the unravelling of the situation. http://lulingfoundation.org/our-history

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Categories: analysis, weather

An 11 year solar signal in the atmosphere

June 27, 2014 9 comments

A 10 year old paper in JGR unearthed a slight solar effect in the atmosphere and whilst the paper is mentioned in various blog comments around the netnote, a quick search suggests it hasn’t had direct exposure. No harm done if it has.

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Subset of Figure 4 from the paper, y-axis is atmospheric pressure hPa. Above is a hovmoller diagram.

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Categories: analysis, entropy, solar
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