Postdoc at University of Hawaiʻi at Mānoa | I study the climate of millions of years ago | I much prefer https://xitter.cf/t.co/hT9KJBrHlL @japhir@fediscience
Utrecht, The Netherlands
Joined October 2009
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One of the last chapters of my PhD thesis has finally been published!
Eocene–Oligocene temperature estimates from the lower mixed-layer and thermocline show cooling and hint at increased stratification and AMOC onset: doi.org/10.1029/2023PA004809
@UUClumpIsotopes @UUEarthSciences
Ilja J. Kocken retweeted
The geologic history of the position of the Southern Ocean subtropical front and what that has to do with the shape of the Antarctic ice sheet: joint @NatureComms paper @UUEarthSciences @uuimau @NIOZatSea ow.ly/L3O750Q8Og7 @peterbijlWilkes @MeiNelissen @Frida_SH @AppySluijs
Ilja J. Kocken retweeted
Very interesting talk by @Japhir on how useful #palaeoceanography is in constraining key #climate metrics used by @IPCC_CH 🐚📈🌡️ – at Norwich, England
On January 11th I had my PhD defence on ‘Clumped isotope thermometry in deep time palaeoceanography’ in the senate hall of @UniUtrecht. #PhD #PhDlife #PhDone #clumpedisotopes #palaeoclimate #paleoclimate #foraminifera
ALT Dr. Ilja Kocken is standing on the stairs of the ancient Academy building of Utrecht University with his PhD diploma in hand, adjacent to his wife, with his two friends and paranymphs behind him. They are wearing suit dress, and behind them the promotor and copromotors and the members of the reading committee are dressed smartly, with professors in black robes with black square floppy hats. The beadle, a lady with a silver staff, is standing to the right.
I'm grateful to my PI and supervisor, @UUClumpIsotopes, copromotor Inigo Müller, and promotor Luc Lourens, the reading committee and everybody else who helped me put this work together <3
Great to share this when my collaborator @Robin_vd_Ploeg just got chapter 3 published! xitter.cf/Robin_vd_Ploeg/status/…
New paper! The paleoclimate swan song of my PhD studies at @UUEarthSciences @UUGeo @NESSCresearch is now out in @ScienceAdvances - read along for coupled seawater temperature and salinity reconstructions in the North Atlantic during the middle Eocene! science.org/doi/10.1126/scia…
Ilja J. Kocken retweeted
New paper! The paleoclimate swan song of my PhD studies at @UUEarthSciences @UUGeo @NESSCresearch is now out in @ScienceAdvances - read along for coupled seawater temperature and salinity reconstructions in the North Atlantic during the middle Eocene! science.org/doi/10.1126/scia…
Ilja J. Kocken retweeted
🚨Just in time for your light christmas reading list: our OA paper in @CommsEarth nature.com/articles/s43247-0… In collaboration with Isabel Sauermilch, @AKAleksinski, @climatedynamics, @FP_GDGT, @francisangi, @peterbijlWilkes, @UU_oceaNice, @UUGeo. 🧵
Migrating to #Mastodon has been very nice so far! @[email protected]. If you're in #earthsciences You can add yourself to all-geo.org/mastodon-earthsc… to opt-in to finding colleagues :). Oh and since there is no algorithmic sorting, follow relevant hashtags directly!
Ilja J. Kocken retweeted
‘You have inspired me to take non-violent direct action with Extinction Rebellion,’ said rebel @csschilder to @GeorgeMonbiot. ‘Can you help me inspire other people to join us?’
His answer was definitely inspiring! So don't hesitate. The time for action is NOW.🔥
This in no way applies to me, nor has it in the past. Ahem…
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Ilja J. Kocken retweeted
I'm very proud to share our latest paper @theAGU Geophysical Research Letters in which we test the #clumped #isotope temperature-relationship on aragonites using #mollusk shells grown @NIOZnieuws
@UUClumpIsotopes @Japhir @JingjingGuo_ @UUGeo @VUamsterdam
agupubs.onlinelibrary.wiley.…
This was one of the questions I wish I had asked the palaeoclimate community after the recap of the science in the IPCC presented by @ClimateSamwell at the #ICP14
What are your thoughts?
A Comment article in @NatureClimate asks when does civil disobedience by scientists on climate change issues become justified. go.nature.com/3RlkOjO
Yesterday I presented our unpublished clumped isotope record of deep ocean temperatures in the Atlantic Ocean across the late Cenozoic to the #ICP14. We think our warm bottom water Ts reflect a true and global warm signal, but inferred δ18Osw change is puzzling.
Did we have rapid fluxes in the composition of the sea water or are there perhaps other processes that influence the oxygen isotopes of the calcite?
I'm very proud of the army of MSc and BSc-students who've enabled us to generate so much data, with lab contributions from @ClumpyTobias and others (not on Twitter) under the supervision of @UUClumpIsotopes
This article on unknowability in climate models explains that the main sources of uncertainty are 1 chaos in the climate system 2 structural uncertainty in the models and 3 human behaviour. But most importantly unknown unknowns as we shift to never-before seen climate states.
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Ilja J. Kocken retweeted
Deep sea temperatures over the past 65 million years were much warmer than previously thought! This is important - with potential implications for our understanding of Earth System Sensitivity. Led by Nele Meckler @BjerknesBCCR, happy to be part of the team! – at Bunnik, Nederland
