Denis Sergeev
@meteodenny.bsky.social
Lecturer in Astrophysics at the University of Bristol. I use numerical models to study planetary climates. Views are my own. He/him.
https://dennissergeev.github.io
ORCiD: 0000-0001-8832-5288
https://dennissergeev.github.io
ORCiD: 0000-0001-8832-5288
Reposted by Denis Sergeev
Published in #MNRAS: "Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures", Sergeev et al. This is Fig. 4: to read the paper please visit academic.oup.com/mnras/articl... @oxfordacademic.bsky.social @royalastrosoc.bsky.social
July 31, 2025 at 8:25 AM
Published in #MNRAS: "Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures", Sergeev et al. This is Fig. 4: to read the paper please visit academic.oup.com/mnras/articl... @oxfordacademic.bsky.social @royalastrosoc.bsky.social
Fresh off the press: lightning activity in high-res simulations for TRAPPIST-1e! Just a nice little study that began as James's and Lottie's undergraduate research project. We find less lightning for higher surface pressures. It's only one model though!
academic.oup.com/mnras/articl...
academic.oup.com/mnras/articl...
Lightning activity on a tidally locked terrestrial exoplanet in storm-resolving simulations for a range of surface pressures
ABSTRACT. Cloudy atmospheres produce electric discharges, including lightning. Lightning, in turn, provides sufficient energy to break down air molecules i
academic.oup.com
July 30, 2025 at 6:12 PM
Fresh off the press: lightning activity in high-res simulations for TRAPPIST-1e! Just a nice little study that began as James's and Lottie's undergraduate research project. We find less lightning for higher surface pressures. It's only one model though!
academic.oup.com/mnras/articl...
academic.oup.com/mnras/articl...
Reposted by Denis Sergeev
Over 5,000 worlds we’ve seen beyond our sky,
Some could host life, some just float by! 🌍🪐
Gas giants, lava lands, icy charms,
The universe is full of alien farms! 👽✨
#Exoplanets!
s-ink.org/known-exopla... 🔭
Some could host life, some just float by! 🌍🪐
Gas giants, lava lands, icy charms,
The universe is full of alien farms! 👽✨
#Exoplanets!
s-ink.org/known-exopla... 🔭
Exoplanets
The collection of known Exoplanets represented based on their date of detection and their relative size to scale.
s-ink.org
June 10, 2025 at 6:28 AM
Over 5,000 worlds we’ve seen beyond our sky,
Some could host life, some just float by! 🌍🪐
Gas giants, lava lands, icy charms,
The universe is full of alien farms! 👽✨
#Exoplanets!
s-ink.org/known-exopla... 🔭
Some could host life, some just float by! 🌍🪐
Gas giants, lava lands, icy charms,
The universe is full of alien farms! 👽✨
#Exoplanets!
s-ink.org/known-exopla... 🔭
Reposted by Denis Sergeev
If you are interested in supporting NASA science and exploration, and saving it from capricious budget cuts, here's one thing you can do: sign this petition being sent to Senate and House members of their respective appropriations committees. Two days left to sign!
www.planetary.org/advocacy-act...
www.planetary.org/advocacy-act...
Advocacy Action Center
The Planetary Society is organizing a new space constituency that is educated, empowered, and loud.
www.planetary.org
June 10, 2025 at 3:27 PM
If you are interested in supporting NASA science and exploration, and saving it from capricious budget cuts, here's one thing you can do: sign this petition being sent to Senate and House members of their respective appropriations committees. Two days left to sign!
www.planetary.org/advocacy-act...
www.planetary.org/advocacy-act...
Reposted by Denis Sergeev
🌦️ Webb's Titan forecast: partly cloudy with occasional methane showers.
A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for the first time! 🔭 🧪
A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for the first time! 🔭 🧪
Titan forecast: partly cloudy with a chance of methane showers
A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for th...
www.esa.int
May 14, 2025 at 12:17 PM
🌦️ Webb's Titan forecast: partly cloudy with occasional methane showers.
A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for the first time! 🔭 🧪
A science team has combined data from the NASA/ESA/CSA James Webb Space Telescope and the Keck II telescope to see evidence of cloud convection on Saturn’s moon Titan in the northern hemisphere for the first time! 🔭 🧪
Reposted by Denis Sergeev
Some of my most recent #spaceart. NOT AI.
Please repost. No new followers in ages. ☹️
#sciart #scicom #astronomy
Please repost. No new followers in ages. ☹️
#sciart #scicom #astronomy
May 1, 2025 at 12:09 PM
Some of my most recent #spaceart. NOT AI.
Please repost. No new followers in ages. ☹️
#sciart #scicom #astronomy
Please repost. No new followers in ages. ☹️
#sciart #scicom #astronomy
Reposted by Denis Sergeev
Reposted by Denis Sergeev
I wrote a research note about the recent publication of the MIRI/LRS spectrum of K2-18b. The authors had claimed the detection of potential signs of life. I find the data to be consistent with a flat line 🔭🧪
Are there Spectral Features in the MIRI/LRS Transmission Spectrum of K2-18b?
https://arxiv.org/pdf/2504.15916
Jake Taylor.
https://arxiv.org/pdf/2504.15916
Jake Taylor.
https://arxiv.org/abs/2504.15916
arXiv abstract link
arxiv.org
April 23, 2025 at 6:49 AM
I wrote a research note about the recent publication of the MIRI/LRS spectrum of K2-18b. The authors had claimed the detection of potential signs of life. I find the data to be consistent with a flat line 🔭🧪
Less than a month till the deadline to apply for this PhD place!
Exciting PhD opportunity at @exeter.ac.uk: Forecasting Martian Dust Storms (funded by @ukspaceagency.bsky.social)! Please share widely!
More details: www.exeter.ac.uk/study/fundin...
More details: www.exeter.ac.uk/study/fundin...
April 23, 2025 at 6:02 PM
Less than a month till the deadline to apply for this PhD place!
Reposted by Denis Sergeev
Sarah’s rules of looking for life with only chemical signatures:
1) the smaller the molecule(s) the more likely they can also be produced by abiotic processes
2) one molecule, if it can be produced by any abiotic process, will never be enough to definitively claim detection of life
1) the smaller the molecule(s) the more likely they can also be produced by abiotic processes
2) one molecule, if it can be produced by any abiotic process, will never be enough to definitively claim detection of life
April 17, 2025 at 12:10 PM
Sarah’s rules of looking for life with only chemical signatures:
1) the smaller the molecule(s) the more likely they can also be produced by abiotic processes
2) one molecule, if it can be produced by any abiotic process, will never be enough to definitively claim detection of life
1) the smaller the molecule(s) the more likely they can also be produced by abiotic processes
2) one molecule, if it can be produced by any abiotic process, will never be enough to definitively claim detection of life
Reposted by Denis Sergeev
𝗡𝗼, 𝗮 𝗯𝗶𝗼𝘀𝗶𝗴𝗻𝗮𝘁𝘂𝗿𝗲 𝘄𝗮𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗱𝗲𝘁𝗲𝗰𝘁𝗲𝗱 𝗶𝗻 𝗞𝟮-𝟭𝟴𝗯'𝘀 𝗮𝘁𝗺𝗼𝘀𝗽𝗵𝗲𝗿𝗲.
K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.
Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).
🔭🧪🪐 #exoplanet
K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.
Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).
🔭🧪🪐 #exoplanet
April 17, 2025 at 4:08 PM
𝗡𝗼, 𝗮 𝗯𝗶𝗼𝘀𝗶𝗴𝗻𝗮𝘁𝘂𝗿𝗲 𝘄𝗮𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗱𝗲𝘁𝗲𝗰𝘁𝗲𝗱 𝗶𝗻 𝗞𝟮-𝟭𝟴𝗯'𝘀 𝗮𝘁𝗺𝗼𝘀𝗽𝗵𝗲𝗿𝗲.
K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.
Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).
🔭🧪🪐 #exoplanet
K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.
Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).
🔭🧪🪐 #exoplanet
Reposted by Denis Sergeev
We're advertising 2 fully-funded PhD positions in atmospheric science @exeter.ac.uk for entry in September 2025. Both are open to UK and international appliants.
The first project is with me looking at Atmospheric heat transport across a range of planetary climates
www.exeter.ac.uk/study/fundin...
The first project is with me looking at Atmospheric heat transport across a range of planetary climates
www.exeter.ac.uk/study/fundin...
Award details | Funding and scholarships for students | University of Exeter
www.exeter.ac.uk
March 27, 2025 at 5:47 PM
We're advertising 2 fully-funded PhD positions in atmospheric science @exeter.ac.uk for entry in September 2025. Both are open to UK and international appliants.
The first project is with me looking at Atmospheric heat transport across a range of planetary climates
www.exeter.ac.uk/study/fundin...
The first project is with me looking at Atmospheric heat transport across a range of planetary climates
www.exeter.ac.uk/study/fundin...
Exciting PhD opportunity at @exeter.ac.uk: Forecasting Martian Dust Storms (funded by @ukspaceagency.bsky.social)! Please share widely!
More details: www.exeter.ac.uk/study/fundin...
More details: www.exeter.ac.uk/study/fundin...
March 26, 2025 at 10:39 PM
Exciting PhD opportunity at @exeter.ac.uk: Forecasting Martian Dust Storms (funded by @ukspaceagency.bsky.social)! Please share widely!
More details: www.exeter.ac.uk/study/fundin...
More details: www.exeter.ac.uk/study/fundin...
Reposted by Denis Sergeev
This account is biased towards my professional interests, so with the caveat there are a litany of reasons to protest those in power in the US, GO PROTEST. Keep protesting. Protest until there is actual change.
White House may seek to slash NASA’s science budget by 50 percent
“It would be nothing short of an extinction-level event for space science.”…
arstechnica.com
March 7, 2025 at 3:05 PM
This account is biased towards my professional interests, so with the caveat there are a litany of reasons to protest those in power in the US, GO PROTEST. Keep protesting. Protest until there is actual change.
Reposted by Denis Sergeev
Reposted by Denis Sergeev
Exciting opportunity to gather, work with and model orographic 🗻💨🗻flow in the European Alps as part of the TeamX (www.teamx-programme.org ) project based at UEA vacancies.uea.ac.uk/vacancies/14...
February 8, 2025 at 10:17 AM
Exciting opportunity to gather, work with and model orographic 🗻💨🗻flow in the European Alps as part of the TeamX (www.teamx-programme.org ) project based at UEA vacancies.uea.ac.uk/vacancies/14...
Reposted by Denis Sergeev
We are really pleased to announce a 3-year postdoc at Bristol to work on tuning a state-of-the-art CMIP7 model using paleoclimate data, and using the tuned model to make future climate predictions.
More details available from me, or here: tinyurl.com/mvx5wmet .
Closing date: 15th Feb
More details available from me, or here: tinyurl.com/mvx5wmet .
Closing date: 15th Feb
February 4, 2025 at 10:15 AM
We are really pleased to announce a 3-year postdoc at Bristol to work on tuning a state-of-the-art CMIP7 model using paleoclimate data, and using the tuned model to make future climate predictions.
More details available from me, or here: tinyurl.com/mvx5wmet .
Closing date: 15th Feb
More details available from me, or here: tinyurl.com/mvx5wmet .
Closing date: 15th Feb
Reposted by Denis Sergeev
Resharing this UK Visa route for recent US university graduates (undergrad or PhD), for anyone who may need to leave the US on short notice (3 week decision time).
For anyone considering leaving the USA for *reasons*, I recently learned about this new UK visa for 'High Potential Individuals (HPI).
If you received a degree from a top 50 university in the last 5 years you can come to the UK *without* needing employment sponsorship.
www.gov.uk/high-potenti...
If you received a degree from a top 50 university in the last 5 years you can come to the UK *without* needing employment sponsorship.
www.gov.uk/high-potenti...
High Potential Individual (HPI) visa
Apply for a High Potential Individual (HPI) visa if you've been awarded a qualification by an eligible university in the last 5 years - eligibility, fees, documents, switch, bring your partner and chi...
www.gov.uk
January 30, 2025 at 11:39 PM
Resharing this UK Visa route for recent US university graduates (undergrad or PhD), for anyone who may need to leave the US on short notice (3 week decision time).
Reposted by Denis Sergeev
The fantastic podcast "Countering Climate Skepticism" has reached its 17th episode.
Co-presented by my former PhD student Mark, it is well worth a listen.
It will help you identify and counter the dizzying array of denial arguments peddled by clueless folk.
ccspod.podbean.com/e/ep17-summa...
Co-presented by my former PhD student Mark, it is well worth a listen.
It will help you identify and counter the dizzying array of denial arguments peddled by clueless folk.
ccspod.podbean.com/e/ep17-summa...
January 30, 2025 at 5:04 PM
The fantastic podcast "Countering Climate Skepticism" has reached its 17th episode.
Co-presented by my former PhD student Mark, it is well worth a listen.
It will help you identify and counter the dizzying array of denial arguments peddled by clueless folk.
ccspod.podbean.com/e/ep17-summa...
Co-presented by my former PhD student Mark, it is well worth a listen.
It will help you identify and counter the dizzying array of denial arguments peddled by clueless folk.
ccspod.podbean.com/e/ep17-summa...
Reposted by Denis Sergeev
From Tom Wagg: Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars. ✨🔭
astrobites.org/2025/01/20/b...
astrobites.org/2025/01/20/b...
Meteorology, Asteroseismology, and the Brunt-Väisälä Frequency - astrobites
Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars.
astrobites.org
January 20, 2025 at 7:30 PM
From Tom Wagg: Today’s bite tells a tale of how 1920s meteorology helps us peer inside pulsating stars. ✨🔭
astrobites.org/2025/01/20/b...
astrobites.org/2025/01/20/b...
Reposted by Denis Sergeev
Registration deadline for #ExoclimesVII is coming up!🚀 Make sure to submit your application before next Friday, January 24th! Fill out the google form here: docs.google.com/forms/d/e/1F...
And make sure to check out our website for more information! exoclimes.org ☄️🔭🌌🪐
And make sure to check out our website for more information! exoclimes.org ☄️🔭🌌🪐
January 16, 2025 at 9:58 PM
Registration deadline for #ExoclimesVII is coming up!🚀 Make sure to submit your application before next Friday, January 24th! Fill out the google form here: docs.google.com/forms/d/e/1F...
And make sure to check out our website for more information! exoclimes.org ☄️🔭🌌🪐
And make sure to check out our website for more information! exoclimes.org ☄️🔭🌌🪐
Reposted by Denis Sergeev
ExoSLAM summer school aims to introduce attendees to low- and high-resolution data analysis, as well as an introduction to current uses of machine learning in astronomy!
Make sure to stay tuned for more announcements of the program!
exoclimes.org/exoslam/inde...
Make sure to stay tuned for more announcements of the program!
exoclimes.org/exoslam/inde...
January 16, 2025 at 10:03 PM
ExoSLAM summer school aims to introduce attendees to low- and high-resolution data analysis, as well as an introduction to current uses of machine learning in astronomy!
Make sure to stay tuned for more announcements of the program!
exoclimes.org/exoslam/inde...
Make sure to stay tuned for more announcements of the program!
exoclimes.org/exoslam/inde...
Reposted by Denis Sergeev
Definitely worth following @simonoxfphys.com - one of the best climate communicators out there. Check out the YouTube stuff in particular
Hello Bluesky! If you've not seen my stuff before, I make YouTube videos about various topics in climate.
Here's my latest, exploring possible causes for global glaciation in the past:
youtu.be/lYE6LkS_2Go
Here's my latest, exploring possible causes for global glaciation in the past:
youtu.be/lYE6LkS_2Go
What would it take for everywhere called Hell to freeze over?
YouTube video by Simon Clark
youtu.be
January 7, 2025 at 3:40 PM
Definitely worth following @simonoxfphys.com - one of the best climate communicators out there. Check out the YouTube stuff in particular
Reposted by Denis Sergeev
PhD position available at the University of Bristol! Come work with me to model convection in sub-Neptune atmospheres! www.findaphd.com/phds/project...
December 6, 2024 at 10:52 PM
PhD position available at the University of Bristol! Come work with me to model convection in sub-Neptune atmospheres! www.findaphd.com/phds/project...
Reposted by Denis Sergeev
We are really pleased to announce a super-exciting opportunity for a 2-year postdoc to work understanding changes in latitudinal temperature gradient in Earth’s past history. University of Bristol, UK. More info and apply here:
tinyurl.com/mrx66d2y
@drsturobinson.bsky.social
tinyurl.com/mrx66d2y
@drsturobinson.bsky.social
December 20, 2024 at 12:08 PM
We are really pleased to announce a super-exciting opportunity for a 2-year postdoc to work understanding changes in latitudinal temperature gradient in Earth’s past history. University of Bristol, UK. More info and apply here:
tinyurl.com/mrx66d2y
@drsturobinson.bsky.social
tinyurl.com/mrx66d2y
@drsturobinson.bsky.social