Ben Gutknecht

After a 1yr pause, we are happy to announce that the iGrav043 of the IGG @jurgenkusche.bsky.social @unibonn.bsky.social is back in the 4K superconducting game! Up and running smoothly. Our team is performing some fine tuning over the next days and hopefully still fetch a glimpse of the #2026draught

How well do regional climate models simulate Europe’s water cycle? Roque et al. compare ICON and TSMP1 (1990--2020) against E-OBS, GPCC and GLEAM across the Ebro, Po, Rhine and Tisa basins. doi.org/10.1002/joc.... #RegionalClimateModels

If you're wondering why you often can't get to CelesTrak lately, it is because we are dealing with a surge of users using software that blatantly violates our usage policy (celestrak.org/usage-policy...). We are working to clean up the mess, but they are making the site unusable for everyone.

🤒😡 This literally isn't cool anymore. Kudos to @copernicusecmwf.bsky.social as it takes some discipline to formulate such numbers in levelheadedness (yes that's a word). For decades, the global ocean absorbed excess energy and, thus, buffered atmospheric effects. When this stops ... .

Get ready for the 21th Geodesy Campfire 🔥 On Thursday, 20 August 2026 at 14:00 CEST, join us on Zoom for an exciting session with Shrishail Raut and Michal Cuadrat-Grzybowski. Read more: buff.ly/Fl6gQHU Register: buff.ly/FhjtOf6 #EGU #Geodesy #GeodesyScience #EarthScience #ShareYourResearch

#EuropeanSolarEclipse Location: Wachtberg near Bonn, Pentax K1 24x4' interval composite iso 100, 1/8000, f22

New position at the Agrar-, Ernährungs- und Ingenieurwissenschaftlichen Fakultät (AEI) and Collaborative Research Centre 1502 on Regional Climate Change. Please read more here: sfb1502.de/news-events/... #ClimateScience

HydroGNSS data are now available to users worldwide. Following commissioning, @esa.int's first Scout mission is now in full scientific operations, providing new observations of soil moisture, wetlands, flooding and vegetation to support water and climate research. www.esa.int/Applications...

Two versions of my favourite ship, RV #Polarstern: one that I worked on during an #Arctic expedition in 2022 and one that I have just finished building from bricks. Evidently, I'm not too old for this!

We are now officially at NORAD Catalog Number 100000. There is no GP data available for Saramago yet.

The International Earth Rotation and Reference Systems Service (IERS) advises: "NO leap second will be introduced at the end of December 2026." For more information, see: hpiers.obspm.fr/iers/bul/bul....

This.

ERA5 single levels and ERA5-Land datasets are now available in an Analysis-Ready Cloud-Optimised (ARCO) Zarr format in the Copernicus Climate Change Service (C3S) Climate Data Store (CDS), enabling faster and more efficient access to key climate data. ⬇️

We now have 263 5-digit catalog numbers left. Projected launch activity (see new.nextspaceflight.com/launches/?q=...) through Jul 13 (5 Starlink, 1 Amazon Leo, Transporter-17) will use at least 220 of those. There are 5 launches in the next 24 hours. We remain on track to hit 69999 by mid-July.

I made a 51k ride this morning, /w temperature profiling in mind. ➡️ Relative #Cooling effect of the Kottenforst woods near #Bonn (here at ~40–46 km): >5 Kelvin! (blue line). At 39km: asphalt-rich settlement; 48km: mixed village; 50km: suburbs /w lots of green. Backfill: altitude range 200m

🥵

Springer Nature to divest its consumer media businesses: group.springernature.com/gp/group/med...

On our ~40 km journey this morning, with @aquasong.bsky.social and 3more colleagues, along the Rhine River to the @crc1502-detect.bsky.social retreat 2026 🚲🚴🚲🚴🚲

What if two GRACE-FO data assimilation systems produce nearly identical terrestrial water storage estimates - but tell different stories about what is happening underground? 🌍💧 New paper in Water Resources Research: doi.org/10.1029/2025... #DETECT #GRACE-FO #DataAssimilation

If this holds true, I might factor in an almost authentic relocation...

Congratulations to Frank Flechtner, receiver of the 2026 Vening Meinesz Medal at #EGU26 Also congrats to @gfz.bsky.social Eva Börgens for an indeed Outstanding @g.egu.eu ECS Lecture tonight! 🌍🚀🛰️🌐

Africa's first GNSS-IR network for water level monitoring is live in Cameroon! 8 low-cost stations, cm-level accuracy, validating Sentinel-3 & 6. Data: www.GNSS4SurfaceWater.com Code, workflows and fieldwork photos at github.com/MakanAKarega...

Congratulations to Frank Flechtner, receiver of the 2026 Vening Meinesz Medal at #EGU26 Also congrats to @gfz.bsky.social Eva Börgens for an indeed Outstanding @g.egu.eu ECS Lecture tonight! 🌍🚀🛰️🌐

We are officially at 68950, but that doesn't include 29 Starlink satellites launched May 1 and 45 rideshares launched May 3. We estimated we would hit 68999 on May 9. Time is running out. We will be making additional changes, like changing the default format to CSV. Watch here and spread the word!

Presentation about this dataset from within @crc1502-detect.bsky.social given by Charlotte in #EGU26 session G3.1 K1 about to start soon at 14:35! meetingorganizer.copernicus.org/EGU26/EGU26-...

Earth joy #artemis2

Just heard that netCDF viewer #ncview by David W. Pierce is no longer available from source b/c California Assembly bill about age verification. This might likely affect bsd/linux ports at version updates. Not great. 😶 cirrus.ucsd.edu/ncview/

📐🎉 150 years of Geodesy in Bonn! This year, the Institute of Geodesy and Geoinformation at the @unibonn.bsky.social celebrates its 150th anniversary. 🗓 Tue 21.04.26 | 17:00 CET 📍 Nußallee 17, Bonn Registration: www.igg.uni-bonn.de/de/anmeldung More: www.uni-bonn.de/de/veranstal...

Very convenient data, esp. if you otherwise have none. We tested the data extensively vs terrestrial water budgets and even against data from the @esaearth.esa.int CCI sea level budget. I might give it a try also as GRACE 'gap filler'

🦋PhD work "Multiannual Reconstruction of the Butterfly Effect" 😉 We observe a clear trend in opacity, which might be an early indicator for the human impact on kitchen climate. Formed over 3yrs during lunch times +colleague with hunger for Marzipan (wasn't me I swear!).

Delivering on its mission! Three months into its life in space, @esa.int ’s HydroGNSS is already hard at work. The mission tracks Earth’s water cycle by analysing navigation signals reflected off the planet’s surface. Curious to see some examples? 🔗 www.esa.int/Applications...

QGIS users: ATTENTION! We now have a convenient #QGIS plugin to integrate the latest version of the Scientific colour maps directly into the style manager: plugins.qgis.org/plugins/scie... Shout-out and big thanks to Silvain Théry. ⭐️ Happy mapping, everyone! #UseBatlow 🐡

Resistance was futile. I have been assimilated 🦳🎹 #carnival #karneval #bonn

If you write about the messy reality behind "free" internet services: we're seeing #OpenStreetMap hammered by scrapers hiding behind residential proxy/embedded-SDK networks. We're a volunteer-run service and the costs are real. We'd love to talk to a journalist about what we're seeing + how […]

Launch of a brand new @egu.eu journal called Earth Observation. Fully open access, publicly peer reviewed and edited by leading experts in ther field. Check out the scope, editors and options. www.earth-observation.net/home.html #openaccess #noprofit #earthobservation 🌍🛰️📡🌊🧊

First comprehensive review paper on assimilating GRACE/-FO terrestrial water storage data into hydrological and land surface models - by Anne Springer @aquasong.bsky.social et al, just accepted for HESS egusphere.copernicus.org/preprints/20... #CRC1502 #DETECT

Dreaming of a career in space? 🚀 The 2026 ESA Graduate Trainee opportunities are launching soon! 🚨 Stay tuned 👉 esa.int/About_Us/Careers_at_ESA/The_EGT_Programme_your_road_to_space #ESArecruits