Alexander Ač
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lacertko.bsky.social
Alexander Ač
@lacertko.bsky.social
climate scientist
Reposted by Alexander Ač
Southern California now sees longer fire weather seasons, like many other places worldwide

Human-caused climate change means hot, dry, windy conditions happen more often, priming landscapes to burn more easily if ignition occurs

Matt Jones et al 2022 agupubs.onlinelibrary.wiley.com/doi/10.1029/...
January 9, 2025 at 8:01 PM
Reposted by Alexander Ač
🌡️🔥Climate change isn't a distant threat—it's a public health crisis now. Our study shows heat-related deaths in many cities could surpass annual COVID-19 deaths in just 5–10 years at 3°C warming. Urgent action is needed!

👉 rdcu.be/d5rnL

@natureportfolio.bsky.social #scientificreports
Rapid climate action is needed: comparing heat vs. COVID-19-related mortality
Scientific Reports - Rapid climate action is needed: comparing heat vs. COVID-19-related mortality
rdcu.be
January 10, 2025 at 11:47 AM
Reposted by Alexander Ač
Check this important new paper led by @fuldenbatibeniz.bsky.social, and co-authored by @afsribeiro.bsky.social @gasparrini.bsky.social @anavicedo9.bsky.social and many further colleagues in climate and health science!

www.nature.com/articles/s41...
🌡️🔥Climate change isn't a distant threat—it's a public health crisis now. Our study shows heat-related deaths in many cities could surpass annual COVID-19 deaths in just 5–10 years at 3°C warming. Urgent action is needed!

👉 rdcu.be/d5rnL

@natureportfolio.bsky.social #scientificreports
Rapid climate action is needed: comparing heat vs. COVID-19-related mortality
Scientific Reports - Rapid climate action is needed: comparing heat vs. COVID-19-related mortality
rdcu.be
January 10, 2025 at 12:55 PM
Reposted by Alexander Ač
Now that more countries have submitted national GHG inventories in the latest format, I'm starting to write a bit of code to compile it all.

Initial impressions: these sheets are better organised, but there are still so many quality of life improvements to make...

unfccc.int/ghg-inventor...
unfccc.int
November 12, 2024 at 8:58 AM
Reposted by Alexander Ač
I compared 22 identical climate-related posts on Threads vs Bluesky over the last 3 months, and the difference is shocking.

Normalized engagement on Threads dropped nearly 2/3 + my following dropped, while Bluesky engagement held steady + following quadrupled.

What’s driving this?

Read on! 🧵
a monkey holding a smiley face a butterfly and an @ symbol
Alt: a monkey holding a smiley face a butterfly and an @ symbol
media.tenor.com
January 6, 2025 at 8:27 PM
Reposted by Alexander Ač
Europe annual climate warming stripes.
January 5, 2025 at 7:50 AM
Less ice, more trees.
Mer de Glace from Grand Hotel du Montenvers
1910 | 2024
Jürgen Merz

Classical view of Alpine glacier demise by
@glacionaut/IG
January 6, 2025 at 12:07 PM
Reposted by Alexander Ač
Vicious cycle
January 5, 2025 at 9:12 PM
Reposted by Alexander Ač
Each year, I adopt 2 new climate-friendly habits.

Originally, I focused on reducing my carbon footprint.

Then, I looked at how to catalyze change at scale: communicating, engaging with others, supporting climate action groups.

This year, I’m going deeper, focusing on what powers our fight: love.
2024 progress, challenges, and what you can do
mailchi.mp
January 5, 2025 at 4:06 PM
Yeah, not permanent, some still say. Well, sure.
🌊🌡️📈
For those who (should) care, the North Atlantic Sea Surface Temperatures are close to record high for the time of the year.

The shifting baseline syndrome makes our minds lose interest.

Excluding recent years shows how extremely hot this 40,000,000 km² ocean still is:
January 6, 2025 at 10:23 AM
Reposted by Alexander Ač
Now you can download all the monthly car sales data for all countries on my webpage in a single CSV file.
robbieandrew.github.io/carsales/
December 19, 2024 at 11:59 AM
Reposted by Alexander Ač
Warming prominently extends vertically aloft into the lower/mid-troposphere over the Arctic in October (i.e., notable Arctic amplification temperature trends).

Data from ECMWF ERA5 reanalysis at cds.climate.copernicus.eu/cdsapp#!/dat... ; possible influences of this warming: doi.org/10.1029/2020...
October 16, 2023 at 11:56 AM
Reposted by Alexander Ač
September 2023 Temperature Update 🔥

Warmest September & largest anomaly ever measured, shattering previous September record.

Warming since August concentrated in polar regions.

Near certain that 2023 becomes the warmest year.

Likely 2023 exceeds 1.5 °C.

berkeleyearth.org/september-20...
October 11, 2023 at 11:00 PM