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seaiceclimate.bsky.social
Alexandra Jahn
@seaiceclimate.bsky.social
310 followers 450 following 10 posts
Climate scientist with focus on the Arctic Ocean and Professor at CU Boulder. Opinions my own. New here
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instaar.bsky.social
INSTAAR 🏳️‍🌈 @instaar.bsky.social · 14d
INSTAAR fellow Alexandra Jahn @seaiceclimate.bsky.social has spent more than a decade studying sea ice and how it's changing in the 21st century. Last year, she visited an arctic community that is feeling those changes first hand. theconversation.com/a-walk-acros...
A walk across Alaska’s Arctic sea ice brings to life the losses that appear in climate data
A polar scientist explains the changes hunters who rely on the ice are seeing off Utqiagvik, and how those shifts are echoed in satellite data and climate models.
theconversation.com
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Reposted by Alexandra Jahn
cires.colorado.edu
CIRES @cires.colorado.edu · Jan 13
RECCS is a paid summer research internship program open to community college students in Colorado, Nebraska, Wyoming, Utah, New Mexico, and Kansas. Applications for Summer 2025 are due by Feb. 9, 2025: https://buff.ly/3DOY0Y7

@ciresceee.bsky.social @colorado.edu
A group of people stand together in a field surrounded by pine trees
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Reposted by Alexandra Jahn
instaar.bsky.social
INSTAAR 🏳️‍🌈 @instaar.bsky.social · Dec 17
🔊 ALEXANDRA JAHN @seaiceclimate.bsky.social speaks with KUNC's Erin O'Toole about predicting when the 1st ice-free *day* on the Arctic Ocean might occur. Jahn & @clnhz.bsky.social found it could happen within 3-20 yrs, an ominous milestone

Listen to 9 min interview: www.kunc.org/podcast/inth...
An ice-free day on the Arctic Ocean? It’s coming sooner than we realized, a CU researcher says
The Arctic Ocean is one of the coldest regions on the globe. But a CU researcher says that some day soon, the Arctic will see its first day in which all of the sea ice has melted due to rising global ...
www.kunc.org
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 5
Can you add me to the climate scientist starter pack too please? Thanks.
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
Published open access as „The first ice-free day in the Arctic Ocean could occur before 2030“ www.nature.com/articles/s41...
The first ice-free day in the Arctic Ocean could occur before 2030 - Nature Communications
The first day with no sea ice in the Arctic will be a visible sign of climate change. This work reveals that this could occur before 2030 already and becomes more likely as the world warms. As the ice...
www.nature.com
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
How could this look like? One example of a #CMIP6 model simulation shown below, with the first occurrence of an ice free (less than 1 million km2) day within 4 years
Graph of model output showing a projection of a first ice free day within 4 years
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
This article in @naturecomms.bsky.social was written jointly with @clnhz.bsky.social from @naturvetenskap.bsky.social
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
www.colorado.edu/today/2024/1...
Countdown to an ice-free Arctic: New research warns of accelerated timelines
The first summer on record that melts practically all of the Arctic’s sea ice, an ominous milestone for the planet, could occur as early as 2027.For the first
www.colorado.edu
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
Only if global warming can be limited to below 1.5°C could ice-free days potentially be avoided. Under all emission scenarios with more than 1.5°C warming, the Arctic sea ice will reach ice-free conditions in the next decades. This is most likely to occur for the first time within 7-30 years.
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
There is a small chance that the first sea ice free day in the Arctic Ocean could occur before 2030 if the right sequence of weather events occur, based on #CMIP6 models. rdcu.be/d2gBK www.colorado.edu/today/2024/1... @clnhz.bsky.social @naturvetenskap.bsky.social @colorado.edu @instaar.bsky.social
The first ice-free day in the Arctic Ocean could occur before 2030
Nature Communications - The first day with no sea ice in the Arctic will be a visible sign of climate change. This work reveals that this could occur before 2030 already and becomes more likely as...
nam10.safelinks.protection.outlook.com
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Dec 3
Congratulations Céline! As far as obsessions go, a #CMIP one is a useful one 🤣
seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Mar 5
This article was written with my co-authors Marika Holland (NCAR CGD) and Jennifer Kay (CU, ATOC & CIRES)

CU story: colorado.edu/today/2024/03/…
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seaiceclimate.bsky.social
Alexandra Jahn @seaiceclimate.bsky.social · Mar 5
New paper alert: While ice-free conditions in September are now likely unavoidable, with first ice-free days possible within the next decade & likely before 2050, future emissions will determine how frequently & for how long the Arctic will be ice-free. rdcu.be/dApgx
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