Blaž Gasparini
blazgaspa.bsky.social
Blaž Gasparini
@blazgaspa.bsky.social
Clouds and climate; Oblakolog;
Cloudy, not blue sky!
Senior scientist @univie.ac.at; previously @UW Atmos Sci, PhD @usyseth.bsky.social
https://blazgasparini.wixsite.com/blaz-gasparini-site
https://klimadynamik.univie.ac.at
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...
One of the perks of living in (the N part of) Vienna is the daily bike ride to #EGU through Donauinsel and Donaupark
October 23, 2025 at 2:41 PM
Seems like we are not at (or slightly above) saturation on the left picture?
October 23, 2025 at 9:29 AM
update
October 13, 2025 at 10:04 PM
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]
September 16, 2025 at 9:03 AM
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.
September 16, 2025 at 9:03 AM
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)
September 16, 2025 at 9:03 AM
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).
September 16, 2025 at 9:03 AM
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?)!
September 16, 2025 at 9:03 AM
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)
September 16, 2025 at 9:03 AM
Here the teaser movie...see later more for explanation
September 16, 2025 at 9:03 AM