iiinova — where your digital self keeps evolving

Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 09/09/2026

Je kan dus ook gewoon op je paard naar je werk. #OV #Staking

A pile of horse dung at my universities bicycle shed

Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 14/07/2025

I'm waiting for the rain to stop before cycling back home in #Enschede, and can watch our cistern filling up through my #homeassisant dashboard. More than 300 liters of water within 15 minutes captured, and thus prevented from going straight in the city drainage system.

Home assistant screenshot of the rapid increase in cistern water volume in response to a cloud burst.

rain radar of a cloud burst passing over Enschede

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 19/06/2025

Brat's dead, baby, Brat's dead github.com/Broadview-Ra... But some of the info on the site was actually quite useful

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 18/06/2025

Is my rage about being harrassed by unsollicited AI prompts justified? Or am I just getting old-fashioned?

Unsollicited AI prompt showing up on the Microsoft 365 landing page

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 30/05/2025

Hmm, still seem to be here? Maybe it's a special treatment for native English speakers

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 22/05/2025

Well I'm not building high speed rail tracks everyday, but it does look like e.g. hsr.ca.gov depends on geoid/datum products from the NGS to get the job done

Screenshot from a document describing surveying requirements for a California High speed train project https://hsr.ca.gov/wp-content/uploads/docs/programs/eir_memos/Proj_Guidelines_TM1_1_4R1.pdf

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 10/05/2025

First attempt at #Kimchi. Fingers crossed it doesn't explode in my kitchen

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/05/2025

Rood borststuk => Europese #hoornaar => vriend. Dus lekker met rust laten

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 02/05/2025

A big thank you to the courageous scientific leaders who dare to speak out their minds during the #EGU25 great Debate on the current attacks on science.

#EGU25 Panel members of the great debate on how the global science community should respond to attacks on science

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 01/05/2025

Bene is clearly ready for their #EGU25 upgoer-5 challenge! Go check it out at PICO spot 3

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 01/05/2025

Interested in signatures of floods and droughts in #GRACE data and derived fluxes? Come check out our @g.egu.eu poster(and its alignment) at 10:45 at X1.78. or check out the work at the git repository: github.com/SedighehKari...

Selfie with #EGU25 poster on drought and flooding signatures in GRACE fluxes and storage time series

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 01/05/2025

Please 🙏 it really is not so difficult to align your #EGU25 poster correctly and bring people like me peace of mind

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 30/04/2025

@nich0lasbr0wn.bsky.social putting the finger on the sore spot and showing critical dependencies on geodesy in our modern society. Raising awareness rather than just money is critically important to sustain a resilient Geodetic Infrastructure #EGU25

Nicholas Brown from United Nations Global Geodetic Centre of Excellence

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 30/04/2025

Great overview by Mahdi Motagh on lignite mining in Germany and the induced subsidence and damages. Besides modelling, local imagery and digitizing of 8000 pdf documents are needed to show the complete picture. #EGU25

Mahdi Motagh explainingbthe efforts it takes to digitize pdf documents containing subsidence data

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 28/04/2025

Nice to see the @egu.eu members showing up at the #EGU25 plenary!

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 28/04/2025

It was nice to exchange thoughts, good and bad and experiences on how to become a supervisor #EGU25 Short Course with Nathalie Farrell, Luca De Siena , @oykukoc.bsky.social. Thanks to the convener team and audience for engaging in this.

Selfie at the #EGU25 mid-term career shortcourse on how to become a supervisor.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 07/04/2025

Thanks Trump! You may go down in history as the US president who accomplished the largest reduction of #CO2 emissions in modern times. It's pure genius to achieve this by crashing the global economy. I propose to name this the 🥁 ... #covfefe #recession of 2025

Dow Jones index plummeting in response to Trump's tarifs

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 07/04/2025

Bill Ackman actually got exactly what he voted for: A derailed narcissist in control of the US

Screenshot from the Huffpost article quoting Billionaire Bill Ackman, who endorsed Trump

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 25/03/2025

Protesteren tegen de kortzichtige bezuinigingen in het #WO #woinactie #Enschede

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 11/03/2025

"Een pannenkoeken met appelmoes #coalitie" kent U die uitdrukking?

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 24/02/2025

That must be a nice source for glaciologists? I see the data covers a fair amount of Greenland and the Antarctic Peninsula

Coverage map of KH-7 and KH-9 satellites. Data source: https://www.usgs.gov/centers/eros/science/usgs-eros-archive-declassified-data-declassified-satellite-imagery-2

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 17/02/2025

I see you, treasure hunting for nerds. Here's a pic (not a marker admittedly) I made, to show that stuff in the Netherlands is complicated. The local polderpeil is modified to -0.77 m NAP to prevent negated gauge readings. So in a flooded polder I would be standing knee-deep in the sea here...

Water gauge expressed in regional datum (polderpeil -0.77 m NAP)

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/02/2025

serve them the wrath of MDPI d) No, but I would like to recommend Dr. contact@doge.gov for a contribution.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 04/01/2025

Sfeerimpressie van de Sallandse Heuvelrug vandaag

Me and dog posing in front of heath landscape

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Finally, if you ever have the chance, please do visit Terschelling, it's very soothing for the mind

The paper also includes some impressions of the study site

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Although shoreline trends vary considerably in space, Bene found that, overal, the geometrical effect of sea level change was 30cm/yr, but the effect of morphodynamics was much larger with 2.8-3.4 m/yr.

Three examples of cross-shore time series for the transects indicated in Fig. 5 showing landward trends in the west and the east
of Terschelling, as well as seaward trends for the central coast.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

And, to assess the geometrical effect of sea level change only, he also intersected a time-constant topography with time variable sea level series.

Trends of shoreline change derived from the JARKUS datasets differ along the coast of Terschelling, showing regions of seaward
and landward movements

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Furthermore, he found, from a comparison with tide gauges, that it is better (less noise) to extract radar altimetry sea level from an offshore proxy region close to the radar altimetry groundtracks, compared to taking it right off the coast.

RMSE between sea level anomalies from altimetry and from the PSMSL
tide gauge per cell

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Altimetric sea level however needs to be corrected for possible vertical land motion to be consistent with the relative sea level as observed at the coast. For this, Bene used vertical land motion derived from permanent GNSS stations for this purpose (it’s actually small here only ~-0.4 mm/yr).

Vertical land motion from GNSS (NGL14 solution) at Terschelling

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

This is tricky, because for a given tidal height correction, a small local slope in topography will result in a large horizontal shift. So errors in both slope and tidal height amplify in these corrections, and they are different everywhere. The proposed validation allows to quantify these errors.

Mean beach slope per transect from the JARKUS dataset

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Bene also produced satellite estimates of shoreline changes from remote sensing water masks by using CASSIE and CoastSat, but, since these observations are instantaneous, shorelines need to be shifted using tidal corrections.

JARKUS profiles for the three example transects in Fig. 5 for the year 2020. The vertical lines indicate the CASSIE shoreline
positions at 10:32:54 UTC on 28 May 2020, without tidal correction (orange) and with tidal correction (brown).

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 05/12/2024

Bene used (a lot of) datasets together to see what they can potentially contribute to a data-driven separation of the drivers of shoreline migration.

Locations of the PSMSL tide gauge coupled with the GNSS station, the North Sea tide gauge, the positions of the JARKUS tran-
sects and the closest of the offshore altimetry observations.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 29/11/2024

It's the second day of its exhibition now, and I'm really starting to appreciate this piece of modern contemporary art in our corridor.

Corridor at work blocked by tape, trolley and warning signs

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 20/11/2024

Dat is niet zo mooi, en het loopt zeker niet goed. Maar dit stukje valt slecht bij me. Een onwenselijke bestuurs cultuur omschrijven als feminien?? WTF? Hoe krijg je dat als 'onafhankelijke' onderzoeker uit je koker?

Text excerpt from the Tubantia paper: Financiële chaos bij Universiteit Twente stating:
De onderzoeker wijt het ook aan de cultuur op de UT. Die wordt getypeerd als feminien: te weinig zakelijk, te veel hang naar harmonie en consensus. „Dat komt het besturen van de UT niet ten goede.”

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 18/11/2024

It pays off to walk away from your screen

Lane of autumn beech trees at the UTwente campus

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 13/11/2024

aarg, too late so I missed the 15 million turnover point

Screenshot of blueskys user counter which surpassed 15 Million by 14828.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 12/11/2024

It's still better for your mental health than watching Elon's 'bird box'

Scene from the movie the bird box, where a man forces a woman to watch.

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Roelof Rietbroek 🌍 👀 @drstrawpants.wobbly.earth · 04/10/2024

Excessive water hyacinth growth in African lakes is causing all kinds of problems, but can you track water hyacinth from space? ITC water resources department PhD student Finn Münch outlines how he will tackle this during his PhD.

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