Robin Hogan
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robinjhogan.bsky.social
Robin Hogan
@robinjhogan.bsky.social
340 followers 230 following 98 posts

Principal Scientist at #ECMWF and Professor of Atmospheric Physics at the University of Reading - Radiative Transfer - #EarthCARE enthusiast https://www.ecmwf.int/en/about/who-we-are/staff-profiles/robin-hogan

Videos
Environmental science 52%
Geography 19%
Posts Replies Media Videos

Reposted by Friederike Otto, Robin J. Hogan

richardabetts.bsky.social
Prof Richard Betts @richardabetts.bsky.social · 11d
This new video from @climateadam.bsky.social is even more brilliant than usual - insightful and hilarious 🧐🤣❤️

www.youtube.com/watch?v=py0X...
Climate Scientist Reacts to AI Overlords
YouTube video by ClimateAdam
www.youtube.com

Reposted by Mario Mech

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · 13d
Job opportunity! 3.5-year postdoc at the Dept of Meteorology, University of Reading, to improve convective storms in high resolution models using #EarthCARE and other data, including close collaboration with both ECMWF and the Met Office - deadline 27 February: jobs.reading.ac.uk/Job/JobDetai...
Postdoctoral Research Scientist (UPFLO project):Whiteknights Reading UK
Full Time, Fixed Term (42 months) Contract
jobs.reading.ac.uk

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · 22d
Save the date! The next #EarthCARE Science and Validation Workshop will be 8-12 June 2026 in the beautiful city of Oxford, deadline for abstracts is 27 February: www.earthcare-science-validation-2026.org

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Jan 8
You can catch up with all the EarthCARE web stories at www.earthcarescience.net/web-stories - there were 21 articles in 2025, and will be many more in 2026!
earthcarescience.net

Reposted by Mario Mech

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Jan 8
There have now been 100 aircraft under-flights of #EarthCARE, each providing invaluable information to calibrate and validate the data products. This example shows very good agreement between EarthCARE and aircraft vertical air motion in nimbostratus. Full article here: earth.esa.int/eogateway/su...
The left column shows various EarthCARE measurements of a deep nimbostratus cloud over Ontario. The right column shows comparisons between EarthCARE’s estimates and in situ aircraft measurements. The bottom two rows confirm that the terminal fall speed of snowflakes is fairly constant whereas the vertical motion of the air fluctuates rapidly and can be estimated well from EarthCARE, the first time this has been possible from space.

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 10
Here is the wider context: satellite observations on the left and the two model versions on the right, visible imagery on top and thermal infrared on the bottom. The eye is stubbornly too wide in the model: what should we change in the model to improve this?

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 10
Never before have we been able to measure vertical velocities from space: on the top is EarthCARE showing falling rain and snow (blue) but in the eye-wall the cloud particles are lofted up (red). The next two panels show the 9- and 4.4-km models with the 4.4-km starting to capture the updrafts!
Doppler velocity (positive up) through Hurricane Humberto: top is EarthCARE, middle is the ECMWF 9-km model and bottom is the ECMWF 4.4-km model.

Reposted by Mario Mech

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 10
In this ECMWF blog post, Mark Fielding compares model simulations at 9- and 4.4-km resolution with #EarthCARE radar observations of Hurricane Humberto, which was sampled right through its eye on 28 September 2025: www.ecmwf.int/en/about/med...
Radar reflectivity through Hurricane Humberto: top is EarthCARE, middle is the ECMWF 9-km model and bottom is the ECMWF 4.4-km model.

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 3
The paper describing the synergy retrievals is here: amt.copernicus.org/articles/16/...
A unified synergistic retrieval of clouds, aerosols, and precipitation from EarthCARE: the ACM-CAP product
Abstract. ACM-CAP provides a synergistic best-estimate retrieval of all clouds, aerosols, and precipitation detected by the atmospheric lidar (ATLID), cloud-profiling radar (CPR), and multi-spectral i...
amt.copernicus.org

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 3
Check out in particular the video explaining how the synergy retrievals are evaluated by "radiative closure": www.youtube.com/watch?v=4d_k...
EarthCARE’s instruments work in synergy to improve climate models
YouTube video by ESA Extras
www.youtube.com

Reposted by Du Toit

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 3
All EarthCARE data have now been released! www.esa.int/Applications...
EarthCARE lifts the clouds on climate models
True to its promise, the European Space Agency’s EarthCARE satellite is now being used to calculate directly how clouds and aerosols influence Earth’s energy balance – the all-important balance that r...
www.esa.int

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 1
More information here: www.satnavi.jaxa.jp/en/news/2025...
EarthCARE satellite “Hakuryu” – All Observation Data Now Publicly Available! – JAXA Satellite Navigator / Space Technology Directorate I
The Japan Aerospace Exploration Agency (JAXA) and the European Space Agency (ESA) have developed the Earth Cloud Aerosol and Radiation Ex...
www.satnavi.jaxa.jp

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Dec 1
First day of the EarthCARE Science & Validation workshop on the beautiful University of Tokyo campus! Takuji Kubota described today's release of all the Japanese products, including those using the synergy of 3 & 4 instruments.

Reposted by Du Toit

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Nov 28
Nice article about the various online and offline visualization and analysis tools that are available for exploring EarthCARE data - thanks to Eleni Marinou (@elmarinou.bsky.social) who coordinates the development of these tools! earth.esa.int/eogateway/ne...
Exploring EarthCARE Data and Analysis Tools - Earth Online
To fully exploit the wealth of EarthCARE data, ESA and its partners have developed a comprehensive suite of data access, visualisation, analysis, and simulation tools. These tools not only support sci...
earth.esa.int

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Nov 27
Exciting week next week with the release of the full tranche of #EarthCARE products, including those using 3 and 4 of the instruments in synergy! JAXA held a media briefing earlier today and I explained why this is important (48mins in). www.youtube.com/live/9375tqa...

Reposted by Du Toit

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Nov 17
Aircraft contrails are contributing to global warming, but the balance between their solar and infrared effects is uncertain. EarthCARE's combination of instruments, particularly its high resolution 3-view broadband radiometer, is perfectly placed to measure them! earth.esa.int/eogateway/su...
Contrail climate effects under EarthCARE’s spotlight - Earth Online
Reducing the climate impact of air travel is a key goal, as the sector continues to expand globally. Aviation contributes 2.5% of global carbon dioxide emissions, but the industry is responsible for 5...
earth.esa.int

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Nov 14
This ECMWF training course is a great opportunity to learn about how physical processes are represented in weather and climate models, free for anyone in an ECMWF member state. It runs 2-6 March 2026 and the deadline for applications is 30 November. events.ecmwf.int/event/496/
Training course: Parametrization of subgrid physical processes
This five-day course is a combination of lectures, hands-on practicals and group problem classes. During the course each parametrized process is introduced and discusses theory, modelling and verifica...
events.ecmwf.int

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
Nice paper, thanks! ECMWF web article coming soon comparing our observations of Humberto with simulations by the IFS at high resolution.

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
There are some tools listed at the page below. This image was produced by Shannon Mason using his free ectools package but I would like these to be produced routinely for all EarthCARE frames. www.earthcarescience.net/tools
EarthCARE Science - Tools
Online visualization
www.earthcarescience.net

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
Would you believe it: just 10 days after #EarthCARE went through the eye of Hurricane Humberto, it did the same with Hurricane Priscilla in the East Pacific on 7 October! A very different beast this one: a huge eye around 100 km across, and very lopsided, with much more rain on the southern side.

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
Second, the signal from the "Rayleigh" channel of EarthCARE's lidar is strongly related with ocean chlorophyll estimates from routine ocean colour measurements, with the advantage that EarthCARE's lidar can continue to make measurements in polar night!

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
First, the depolarisation of the land surface measured by EarthCARE's lidar seems to be very well correlated to the widely used "NDVI" vegetation index - but why? We don't yet know but potentially this could be telling us something new about vegetation!

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Oct 23
New instruments always throw up surprises - Gerd-Jan van Zadelhoff of KNMI had a look at the #EarthCARE lidar's surface returns and found some intriguing and unexpected things as explained in ESA's latest EarthCARE web story... earth.esa.int/eogateway/su...

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 29
And here's EarthCARE's radar reflectivity with GOES-E for context (thanks to Mark Fielding)!

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 29
Plots above thanks to @masonshannon.bsky.social, more on the EarthCARE Science web site www.earthcarescience.net/gallery
EarthCARE Science - Gallery
In addition to the scientific insights we can gain from EarthCARE's precise measurements, the satellite is an inexhaustible source of beautiful imagery.
www.earthcarescience.net

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 29
The level of detail revealed by EarthCARE is amazing: as well as the usual change in vertical Doppler velocity as snow melts to rain, we can see the rising air in the eye wall! The imager also captures the 3D nature of the convective cells in the rain bands further out. More analysis to come...

Reposted by Du Toit, Jussi T. Eronen, Vincent Noël , and 1 more

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 29
So this is pretty amazing - yesterday EarthCARE sampled Hurricane Humberto straight across the eye! The eye of a tropical cyclone is small so a direct hit is rare: this is the first time EarthCARE has hit one after over a year in orbit! (Showing here also VIIRS on NOAA-20 for context.)

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 26
...and the volcanic plume from Klyuchevskaya Sopka in Russia, which erupted July-August 2025. More coming soon! Thanks as always to @masonshannon.bsky.social for many of the images and to NASA Worldview for the wider context. worldview.earthdata.nasa.gov?v=154.961959...

robinjhogan.bsky.social
Robin Hogan @robinjhogan.bsky.social · Sep 26
EarthCARE is a inexhaustible source of beautiful imagery of some of the most spectacular phenomena nature has to offer, so I've started a Gallery page on the EarthCARE Science web site, showing for example convective motions in the trainbands of Typhoon Ragasa... www.earthcarescience.net/gallery