Mastodawn

So, #ClimateSky, solve an argument between co-authors: When writing a paper specificalyy using outputs from #CMIP6 models, do you prefer to use GCM or ESM as descriptor? #GlobalClimateModel #EarthSystemModel

💧🌏 Greg Cocks Apr 8, 2025

Ancient Lakes And Rivers Unearthed In Arabia's Vast Desert
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https://phys.org/news/2025-04-ancient-lakes-rivers-unearthed-arabia.html <-- shared technical article
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https://doi.org/10.1038/s43247-025-02224-1 <-- shared paper
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#GIS #spatial #mapping #water #hydrology #quaternary #desert #geomorphology #landforms #geomorphometry #Arabia #climatechange #RubalKhali #SaudiArabia #holocene #model #modeling #spatialanalysis #spatiotemporal #earthsystemmodel #geology #lacustrine #fluvial #sediments #sedimentary #flood #flooding #lakes #AfricanMonsoon #rivers #paleohydrology #stratigraphy #remotesensing #landsat #earthobservation #dating #delta #cliff #terrace #rainfall #precipitation

Ancient lakes and rivers unearthed in Arabia's vast desert

The desert that we see today in Arabia was once a region that repeatedly underwent "green" periods in the past, as a result of periods of high rainfall, resulting in the formation of lakes and rivers about 9,000 years ago.

Prof. Tatiana Ilyina Sep 23, 2024

What if we could start a weather simulation and let it run over seasons, years, decades, centuries ...
This is at the heart of the ICON-Seamless Project developing a new #EarthSystemModel suitable for #weather and #climate forecasts.

This new ICON-XPP model is our working horse for the upcoming CMIP7 climate projections. It will also remain the horse we are working on 😉

At an all-hands workshop at the Seewetteramt #Hamburg last week we discussed progress and challenges.
@DeutscherWetterdienst

Prof. Tatiana Ilyina Sep 12, 2024

Please spread this #Job Opening in my group at Universität #Hamburg: Postdoctoral | #Research Associate in the Project “CAP7”.

The focus is to enhance the representation of ocean biogeochemical processes, carbon-climate feedbacks, and ocean carbon storage under changing emissions in the new generation #EarthSystemModel ICON-XPP.

These novel simulations will contribute to #CMIP7 and the next #IPCC assessment of #climatechange.

See how to apply 👇
https://www.uni-hamburg.de/stellenangebote/ausschreibung.html?jobID=2e0d47c3b6870aeb6c73a893985cc286d4d924d6

Ausschreibung

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Prof. Tatiana Ilyina Sep 9, 2024

Acceleration of #climatechange is taking place due to our failure to cut increasing CO2 emissions.

Any impact of Arctic coastal #permafrost erosion on the global #climate through increasing atmospheric CO2 concentrations until 2100 is comparatively small.

Yet, this new #EarthSystemModel component allows for a better quantification of the carbon budget, necessary for carbon monitoring under #decarbonisation .

Read more in this press release 👇
https://www.uni-hamburg.de/en/newsroom/presse/2024/pm40.html
#ilyinaScience

In years to come, the Arctic Ocean will absorb less CO2 than expected

Prof. Tatiana Ilyina Sep 9, 2024

In a #newpaper from my group, led by David Nielsen, we incorporated coastal permafrost as a new component of an #EarthSystemModel.

This allowed us to quantify that #coastal #permafrost erosion weakens the Arctic Ocean #CO2 uptake from the atmosphere by 7-14%.

This exerts a positive biogeochemical feedback on #climate, increasing atmospheric CO2 by 1–2 TgC yr−1 per °C of increase in global surface air temperature.

Find out more here👇
https://www.nature.com/articles/s41558-024-02074-3
#ilyinaScience

Reduced Arctic Ocean CO2 uptake due to coastal permafrost erosion - Nature Climate Change

The rate of Arctic coastal permafrost erosion is predicted to increase up to 3 times by 2100. Here the authors model how organic matter released from coastal permafrost erosion will reduce the CO2 sink capacity of the Arctic Ocean and lead to positive feedbacks on climate.

Nature

Prof. Tatiana Ilyina May 7, 2024

"Collaboration instead of academic competition" - my motto for the interview on the recent World Climate Research Program Workshop - "a climate modeling summit" - which we hosted in Hamburg. Find out why I believe so👇

https://www.cliccs.uni-hamburg.de/about-cliccs/news/2024-news/2024-05-03-esmo-meeting.html

#EarthSystemModel #climatescience #WCRP

Hamburg Hosts Climate Modelling Summit

The first WCRP-ESMO meeting took place in Hamburg, where Earth System Modelling Scientists talked about their future research. An interview with Professor Tatiana Ilyina.

Universität Hamburg

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Prof. Tatiana Ilyina Apr 29, 2024

What happens after a snowball Earth melts?

With the new #EarthSystemModel ICON, we find that the supergreenhouse climate was not necessarily a stable and hot climate over hundreds of thousands of years. It is also possible that the temperatures were moderate and even declined rapidly, on a time scale of just a few thousand years, in response to changes in the ocean C-cycle.

Find out in this news piece👇
https://mpimet.mpg.de/en/communication/news/was-passiert-wenn-eine-schneeball-erde-schmilzt

with more details in our new paper👇
https://doi.org/10.1038/s41467-024-47873-6

What happens after a snowball Earth melts?

When a snowball Earth deglaciates, the planet transitions rapidly into a hot "supergreenhouse" climate that persists for a hundred thousand years or more - according to the classic snowball Earth theory. In a new publication, MPI-M scientists Lennart Ramme, Tatiana Ilyina and Jochem Marotzke show that this concept is too simplified, as the ocean transformations after a snowball Earth drive strong carbon cycle dynamics, which alter the evolution of atmospheric CO2. In fact, scenarios ranging from a rapid decline to a further intensification of the supergreenhouse climate are possible, depending on the chemical conditions at the start of the snowball Earth deglaciation.

Prof. Tatiana Ilyina Apr 29, 2024

Once upon a time, only about 650 million years ago, our Earth was a snowball. What was the aftermath #greenhouse #climate triggering deglaciation and the ocean's role in it?

We addressed this intriguing scientific question via a set of #EarthSystemModel experiments in the new Nature Communication paper "Moderate greenhouse climate and rapid carbonate formation after Marinoan snowball Earth" led by Lennart Ramme within his PhD project.

https://doi.org/10.1038/s41467-024-47873-6

Prof. Tatiana Ilyina Mar 14, 2024

Have a look at our simulation of the air-sea #CO2 flux and surface wind speed in a high-resolution #EarthSystemModel model ICON 👇
https://youtu.be/63NZSPjxv6w

I find September particularly fascinating in this animation. A hurricane in the Western Atlantic entirely messes up the CO2 flux. Here, the immediate effect is that the hurricane enhances the outgassing of CO2. Behind it, the flux swaps the sign and there is uptake of CO2.

#ilyinaScience

Air-sea CO2 flux and surface wind speed simulated with high-resolution HAMOCC@ICON

YouTube