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Martin Stendel
Climate scientist, focus on Arctic permafrost and African rain. 🇪🇺 🇩🇰 🇩🇪. Striving to convey science to the public. Born at 317 ppm. Views my own.
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Martin Stendel 2h
981.0 hPa in Haparanda: Lowest July sea level pressure in Sweden in more than 60 years (in Swedish)
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Martin Stendel 11h
Wähle deine Konflikte mit Bedacht.
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Martin Stendel 11h
Over the next few days, anomalously high pressure and warm air masses prevail over the central Arctic. Depending on the stability of the surface inversion, this warm air can affect sea ice, which already now is rather thin. Thaw lakes on the ice could speed up the process.
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Martin Stendel 19h
I have, together with a number of rather well-known colleagues, been cited by .
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Martin Stendel retweeted
Simon Lee Jul 1
In the longest continuous instrumental dataset in the world -- the Central England Temperature -- the new 1991-2020 climate period for the first 6 months of the year is the warmest standard 30-year climate period on record. Wow. The very definition of .
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Martin Stendel Jul 1
Replying to @SimonLeeWx
Thought it was a vertical cross section of some front-perpendicular wind component, but got confused about the units.
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Martin Stendel Jul 1
Thanks for counting me in to this illustrious group...!
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Martin Stendel retweeted
Guy Callendar Jul 1
I think I would make an excellent statue.
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Martin Stendel Jul 1
Also, we don't know how good an estimate the standard deviation based on over 1981-2010 is for the real standard deviation, so the above numbers are not carved in stone. But this was just a thought experiment. May I suggest that you send a PB if you have further questions.
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Martin Stendel Jul 1
So the difference essentially is looking at the recurrence interval for a point versus for the whole Arctic (which probably is the more meaningful measure). But also 2900 years is a rare event and improbable, but not impossible, without climate change.
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Martin Stendel Jul 1
Thanks for asking! You have to take into account that neighbouring values are not independent, which reduces the number of degrees of freedom. For the Arctic, we estimate dof=50, so that p0=(1-5.733E-7)^50 =0.999971 and 1/(1-p0) =34900, i.e. a recurrence interval of 2900 years.
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Martin Stendel Jul 1
We knew that these (and only these) had been digitized. But we have hundreds of thousands of observations which have not yet been digitized. Together with from , wants to make them available to the public.
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Martin Stendel Jul 1
I was able to read a bunch of diskettes written in August 1992, 28 years ago. Content: Weather observations between 1675 and 1715, taken on guard ships around the island of Sjælland. These ships were used to enforce the payment of the Øresund duties.
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Martin Stendel Jul 1
Once again . Not quite unexpected.
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Martin Stendel Jun 30
Replying to @MartinStendel
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Martin Stendel Jun 30
Temperatures in in June 2020 (red, green, blue: daily max, mean, min; thick lines: 2020, thin lines: mean 1885-2020). New daily records for every day between 20 and 28 June except 26 June. Up to now, June 2020 is 6°C warmer than the average, also a new record.
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Martin Stendel Jun 29
Replying to @ruth_mottram
It's not half as funny as you might think...
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Martin Stendel Jun 29
Replying to @ruth_mottram
As consequence of one of the rather few wrong decisions in my life I had the opportunity to try all kinds of firearms, if you know what I mean. If I had tried this, I would immediately have been subject to severe consequences.
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Martin Stendel Jun 29
I am telling you it was unprecedented because it was unprecedented. Two suggestions: 1. This analysis is based on ERA5, which is freely available for everyone, including you. Download it and look for yourself. 2. If you don't like my tweets, you should consider to block me.
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Martin Stendel Jun 29
Temperatures can be rather high in Verkhoyansk. But in July, because of the continentality. For June, this is unprecedented. P.S. Do you really believe I haven't taken continentality into consideration?
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