Jan Zika
janzika.bsky.social
Jan Zika
@janzika.bsky.social
Associate Professor at UNSW (Maths and Stats), Sydney. Our team aims to understand the role of the ocean and water in the climate system using innovative data science and modelling techniques. https://climate-data-dynamics.github.io
Paper just out in AI4Earth led by the incredible @eveapiedagnel.bsky.social. We show how to exploit the ocean’s tight T-S relationship at constant pressure to map trends in salinity from sparse data doi.org/10.1175/AIES.... GMM works well because the relationships are so linear, but why are they?
doi.org
July 23, 2025 at 2:20 AM
If anyone is at BACO25 looking for the room where a certain someone might be talking this morning 👀…it’s M211 - go right at the top of the escalator as you reach level 2. 🙂
July 22, 2025 at 11:42 PM
Very proud of our student Josef (Joey) Bisits. My first time in JFM. It turns out you can have a stratified water column, mix it a little, and it becomes unstable. Fluid dynamics is fun!!!
🚨New Paper!

Led by Joey Bisits, with @janzika.bsky.social, we explore the drivers of cabelling instability in the ocean using a first-of-its-kind turbulence-resolving simulation. See here for energy budgets, diffusion calcs and pretty pictures using Oceananigans: doi.org/10.1017/jfm....
Cabbeling as a catalyst and driver of turbulent mixing | Journal of Fluid Mechanics | Cambridge Core
Cabbeling as a catalyst and driver of turbulent mixing - Volume 1011
doi.org
May 20, 2025 at 7:30 AM
Seems everyone has arrived at BlueSky! I am taking some holidays till January but looking forward to communicating with you all more on the platform about climate/ocean/fluids/data in the NY! 🥳😎🎄
December 5, 2024 at 8:28 AM
As far as I know this isn’t an early April fools joke. I’m excited to try to get back to Scotland - though less excited to be there in February
March 3, 2024 at 3:31 AM
Just submitted an ARC DP EoI. 2 improvements in addition to 2 stages imho: 1. CV section is shorter (in one bit 5pages is swapped with 1500chars!) 2. Project partners only need to prepare a 1 page CV. I am now no longer embarrassed to ask international partners to do the paperwork for a full ‘ROPE’.
February 23, 2024 at 4:20 AM
What is your niceness limit? I just got requests from a PhD program to give a reference for a student who took a graduate class of mine 2 years ago. No warning from them. I only have their old student email which bounces. I’d like to think I’m a nice guy but…
February 1, 2024 at 4:32 AM
Reposted by Jan Zika
Really proud of this work, which went from an idea back in August 2022, to a published piece this week! With co-authors Damien Irving, @janzika.bsky.social, and Jonathan Gregory, we explored the reduced impact of aerosols on our climate system:

agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Anthropogenic Aerosols Offsetting Ocean Warming Less Efficiently Since the 1980s
Since 1980, aerosol-driven ocean cooling has decelerated substantially, alongside a drop in ocean heat uptake efficiency The drop in ocean heat uptake efficiency is limited to the tropics, which ...
agupubs.onlinelibrary.wiley.com
December 4, 2023 at 3:17 AM
Reposted by Jan Zika
Happy to have been asked to provide comments on a new and critical piece of work about Antarctic ice shelf melting for Nature Climate Change. Free link 👇

rdcu.be/dphfQ
rdcu.be
October 25, 2023 at 3:04 AM