Nikolay Koldunov

Working on FESOM2 unstructured ocean model, km-scale climate modelling, visualisation and ML for climate.

[Nikolay Koldunov @oceanographer]

Elon Musk killed scientific Twitter. I am moving to https://t.co/xgh66PvsFG

[Qiang Wang @QiangWang_AWI]

The eastern Arctic Ocean became warmer with weakened stratification in the 2010s, the so-called "atlantification". This paper compares different hypotheses, showing that sea ice decline was the main driver, while natural variability played smaller role.
https://t.co/4pMfAT4OUY

[Nikolay Koldunov @oceanographer]

🌊 PostDoc in Numerical Ocean Modelling (f/m/d) 🌊
Join AWI to study energy transfers & numerical mixing in dense ocean currents using high-res models (MITgcm, FESOM2). Shape the future of ocean dynamics!

📍 Bremerhaven
🔗 Details: https://t.co/DcwRYFFuVe

[Nikolay Koldunov @oceanographer]

🚨 Freshwater bottleneck in the Arctic? 🌊

A Beaufort Gyre freshwater release shifts to a buffer zone near Greenland, delaying Arctic freshwater flow to the North Atlantic. Implications for ocean stratification, salinity anomalies, & AMOC?

Read in Nature Geoscience:

[Qiang Wang @QiangWang_AWI]

We found an Arctic freshwater anomaly has shifted to a buffer zone just behind the doors leading to the North Atlantic. A "natural experiment" is getting set up. New observations in the North Atlantic in coming years can be used to test diff. hypothesis!
https://t.co/ZTnIQRmm70

[Qiang Wang @QiangWang_AWI]

We found an Arctic freshwater anomaly has shifted to a buffer zone just behind the doors leading to the North Atlantic. A "natural experiment" is getting set up. New observations in the North Atlantic in coming years can be used to test diff. hypothesis!
https://t.co/ZTnIQRmm70

[Marylou Athanase @MarylouAthanase]

Our latest @AWI_Media paper is now featured on the front page of @CommsEarth !🎉👇

[Nikolay Koldunov @oceanographer]

🌧️ Storm “Boris” dumped 9% more rain due to global warming, fueling floods in Europe. AWI’s new ‘storyline’ simulations reveal: what if Boris hit in a world without climate change?

Press release: https://t.co/PgK0OxGNJa

[Marylou Athanase @MarylouAthanase]

🌧️Extreme rainfall: how much is due to climate change?

For Sep. 2024 Storm Boris, a substantial amount. At @AWI_Media, we find this using a new & relatable near-real-time system which unveils the “climate change signal of the day” for (extreme) weather:

https://t.co/B3Tsrq47LY

[Nikolay Koldunov @oceanographer]

Planning my bike trip with #OpenAI #ChatGPT search function. It gets information on the weather, and then I can use it to analyse conditions day by day. Not sure about the quality so far, but certainly promising. One more of my startup ideas is dead :)

[Nikolay Koldunov @oceanographer]

Had a fantastic time collaborating with colleagues from @ECMWF on this study! 🚀 This marks a significant first step toward integrating AI-driven weather forecasting models into climate research. Exciting times ahead! 🌍🔍 #Climate #AI #WeatherForecast

[Thomas Rackow 🧊 @thomas_rackow]

Can #AI-based weather forecasting models (trained on present-day data) provide skillful forecasts also in different colder and warmer states of the climate system?

Our new preprint @arxiv explores this question:
https://t.co/zIYPxk97SF

Here is what we found so far (🧵1/6)

[Thomas Rackow 🧊 @thomas_rackow]

Can #AI-based weather forecasting models (trained on present-day data) provide skillful forecasts also in different colder and warmer states of the climate system?

Our new preprint @arxiv explores this question:
https://t.co/zIYPxk97SF

Here is what we found so far (🧵1/6)

[Francisco J. Doblas-Reyes @DoblasReyes]

Interested in a four-year research contract with few strings attached? If you work or know of an early-career scientist working on remote sensing applications, have a look at this vacancy https://t.co/SJu1f7O0FR @BSC_CNS @icreacommunity @ICMCSIC @la_UPC

[ECMWF @ECMWF]

🌍🌐 ECMWF's @thomas_rackow explores the topic of km-scale as a key aspect of #DestinE digital twins, highlighting features of new km-scale models like those in @nextgems_eu. Find out more about the various benefits with visual examples ️ ➡️ https://t.co/cURHkNO5qA

[Nikolay Koldunov @oceanographer]

@shoyer RCM community tries to figure it out for years (e.g. https://t.co/bBUfSLhnqe)
The ultimate test is comparison with observations, I would guess.

[Nikolay Koldunov @oceanographer]

@michaelnacke На вторую карту масштаб бы тоже нанести.

[Nikolay Koldunov @oceanographer]

Never thought I would see the Aurora in Northern Germany...

[Nikolay Koldunov @oceanographer]

@IlyaYashin Бремерхафен, пару дней назад.

[Nikolay Koldunov @oceanographer]

High-resolution (9km in atmosphere, 4-25km ocean) projections of climate change for the 2090s and other decades. A joint effort by teams from the IBS Center for Climate Physics and @AWI_Media #FESOM

https://t.co/17dOtY9J53

[Nikolay Koldunov @oceanographer]

@iam_dong2 @noam_vv We have low resolution there, so cut them out :)

[Nikolay Koldunov @oceanographer]

Tracking some ocean eddies with SAM 2. :)

Data from #FESOM2 1-km simulation of the Arctic Ocean.

[Nikolay Koldunov @oceanographer]

@deepakns Yes, first manual selection on the middle frame, and then it detects forward and backwards.

[Nikolay Koldunov @oceanographer]

@deepakns You have a limit of three in the online tool, and you have to pick them by hand. If one can use it for detection it remains to be seen, but the tracking looks very promising:)