Blaž Gasparini

Multi-panel view of the last few days of Hurricane Melissa:

↖️ GOES-19 infrared brightness temp
↗️ GOES-19 visible satellite
↙️ Hurricane hunter planes & flight paths
↘️ Recon-derived flight level wind swath
⬇️ Estimated minimum pressure from recon dropsondes

at least from Dec on there's again a direct train from Wien to beyond Bratislava...no need to change any more there
🤦

Very bright circumzenithal arc from last weekend!

Get a bike! The area around the conference center is very bike-friendly (I wouldn't say that's generally true everywhere in the city)
bsky.app/profile/blaz...

Seems like we are not at (or slightly above) saturation on the left picture?

Great read from Mike Wallace (yes, that Wallace from Wallace & Hobbs) on how his view of global warming evolved. From early doubt to real concern.

‪I spent a great week visiting the CELLO-Arctic campaign, led by Tim Carlsen and Rob David from the University of Oslo, one of efforts to validate EarthCARE’s products.
I learned a lot about flight planning & really enjoyed the positive vibes and excitement!
More on their website: lnkd.in/dWvANupz

update

Finally, I made it! The aurora was so bright that it was easily visible to the naked eye, not just on camera!

Made it to Kiruna to join the U Oslo's CELLO Arctic EarthCARE validation campaign for a week
www.mn.uio.no/geo/english/...

Some more memories from my September mountain trip and mountain boundary layer: clouds filling the valley and climbing up toward us

Look at all those anvil top turbulence!

Schöne Kollektion an #Föhnfischen heute am Himmel. Der #Föhn machts möglich.

Durch die vom starken Wind ausgelöste Wellenbewegung entstehen diese linsenförmigen Wolken, die scheinbar für mehrere Stunden an Ort und Stelle „stehen“.

#Lenticularis #AcLen #AltocumulusLenticularis

Finally, coming back to the evolution and the journey of ice crystals. We can tear that apart with the help of the "time after convection tracer". Caveat: Can we do something similar with observations? Such analysis will become even more useful at that point [I don't have a good answer to this one]

We can tear the origins apart. The model produces lots of situ cirrus, but they are very thin, contributing only a little to the total TOA energy budget.

But the novelty here is the use of passive tracers to get to:
1. anvil cloud "age"
2. distinguish between convective-origin (anvils) and in situ origin cirrus (formed by ice nucleation on gravity waves)

But only proper input, particularly updrafts in combination with humidity, can lead to reasonable cloud properties. If you are interested in thin cirrus, you may need to go to well beyond km scales to get that right. For fresh anvils, however, 1-4 km may be sufficient (not shown here).

We achieved that in 3 steps that basically don't add up any additional cost to the model. All just quick fixes, not super novel, but simple to implement so you may want to do something similar (or better?)!

We are happy with the updated SAM-P3ice cloud-resolving model's ability to simulate tropical cirrus (both convective and non-convective = in situ origin)

Here the teaser movie...see later more for explanation

We studied the journey of ice crystals from deep convective cores to thin cirrus (and those formed by ice nucleation too) in a km-scale model
acp.copernicus.org/articles/25/...
@univie.ac.at

Great to see this article! We’re also happy to have @claudiablaas.bsky.social supporting us with teaching, running climate model simulations on an HPC system, and guiding us through ASC. Her involvement is certainly an inspiring example for our female students.

Last week at the Italy–France border: moist valley air rising and forming near-surface clouds, while a higher cloud layer (with a cloud base of around 3,500 metres) tries to grow by convection, but fails to reach the rain stage. Beautiful!

5 forecasts early climate models got right – the evidence is all around you From rising global temperatures to the fast-warming Arctic, early climate models predicted the changes half a century ago.

nice article from Nadir Jeevanjee (is he on bluesky?) about predictions climate models got right. successful predictions are the gold standard of science.

5 forecasts early climate models got right – the evidence is all around you
theconversation.com/5-forecasts-...

tomorrow at 19.00!

Thanks for sharing these beautiful pictures, nice clouds, nothing unusual about them, no reason to worry...

Waldbrände in Kanada sorgten für diesigen Himmel über Österreich Die milchiggrauen Schleier, die den Himmel über dem Alpenraum eintrübten, kamen von besonders weit her. Die Luftqualität in Bodennähe war nicht beeinträchtigt

Hey Erich, nobody is artificially spraying the sky to my knowledge. However, sometimes, there's either human-made or natural pollution up there, causing nice colorful sunsets. No evil involved. Recently getting often some Canadian wildfire smoke here, for example. www.derstandard.de/story/300000...

Next Wednesday (27.8.) we're having a very diverse and hopefully interesting panel discussion on solar geoengineering within the ICNAA conference, 19.00 at Palais Eschenbach, welcome!

Cloud Power: How the Sky Shapes Our Climate - ECH Almost every day, we can see clouds in the sky, but rarely we are aware of their wide-ranging impact on the climate. They can both raise and drop temperatures and have complex interactions with the pa...

Paul Winkler and me talked about clouds and aerosols, which ended up in a nice short article put together by Thomas Zauner for the @univie.ac.at Environment and Climate Research Hub.
ech.univie.ac.at/story/cloud-...

Am Peršmanhof hat ein SS Polizeiregiment vier Erwachsene & sieben Kinder niedergemetzelt.

80 Jahre später in der Gedenkstätte:
Polizei brüllt mit Hand an der Waffe rum.

Videos: ZiB 1 & Dnevnik (die wesentliche Nachrichtensendung in SLO):

on.orf.at/video/142854...

365.rtvslo.si/arhiv/dnevni...