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Posts by Kris Karnauskas

A new study led by CIRES/CU Boulder’s Max Elling proposes a practical framework to help identify how model choices, including physical parameters and experimental setups, create performance tradeoffs that affect metrics directly relevant to nature and society.
link.springer.com/article/10.1...

3 weeks ago 3 1 1 0
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AGU is now accepting applications for Editors-in-Chief across five publications, with terms starting Jan 1, 2027. These roles help shape editorial standards, research quality, and peer review in Earth & space science. Apply by May 1, 2026.
buff.ly/8Mxy8vq

1 month ago 3 2 0 0
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It's been a very warm and dry winter in Boulder, CO.
Data from GHCN-Daily since 1900.
#COwx

1 month ago 8 2 1 0
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Globally, no single day in 2025 was cooler than its 1991-2020 average.
climate.copernicus.eu/global-clima...

3 months ago 1013 683 21 72
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🌍 Our new @natclimate.nature.com study, led by @xuyanbin.bsky.social shows climate variations like El Niño don’t just affect weather — they can shape long-term human health and economic outcomes. Proud to contribute on the climate science side.
www.nature.com/articles/s41...

#ENSO #PublicHealth

3 months ago 7 4 1 0
Sign up to meet with an AGU Editor
December 16-18th
AGU Central Exhibit hall

Sign up to meet with an AGU Editor December 16-18th AGU Central Exhibit hall

Thinking about publishing your work with AGU?

Sign up for a 15 minute 1-on-1 meeting with an AGU editor at #AGU25 for advice on finding the right journal and submitting your work!

🔗 buff.ly/89flzjc

#AGUPubs #EarlyCareer

4 months ago 8 6 0 3

Need a little help! Student seeking high-freq (at least daily), high-res (~10 km or less) gridded ~surface ozone & PM2.5 observations. Next best thing would be hourly station-level data of surface O3 and PM2.5 with decent spatial coverage across the globe. Anyone out there know of such a dataset?

5 months ago 0 0 0 0

We ran 15 experiments using models from four institutions (MPI, NASA/GISS, NCAR and NOAA/GFDL).

6 months ago 1 0 0 0
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Key Points

6 months ago 1 0 0 0
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ColdBlobMIP: A Multi-Model Assessment of the Atmospheric Response to the North Atlantic Warming Hole
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

6 months ago 9 1 2 0
A global map of the Pacific Ocean showing surrounding continents with orange colors highlighting warmer sea surface temperatures.

A global map of the Pacific Ocean showing surrounding continents with orange colors highlighting warmer sea surface temperatures.

Ocean scientists are one step closer to understanding the connection between warming in the Eastern Tropical Pacific Ocean and its impact on weather and climate. The new study by @oceanclilmatecu.bsky.social and partners in @agu.org Earth's Future is spotlighted here! buff.ly/Tcbj2fq

6 months ago 7 2 0 0
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Persistent eastern equatorial Pacific Ocean upwelling since the warm Pliocene Upwelling generates a nutrient-rich “cold tongue” in the eastern equatorial Pacific Ocean (EEP), with impacts on global climate, oceanic biological productivity, and the carbon cycle. The cold tongue ...

Today, we published a study long in the making on how upper and subsurface tropical Pacific waters responded (and maybe will adjust) to warmer global climate. Here’s the story of how we got here after 15 years. many authors but shout out @jfarmersalmanac.bsky.social
🌊
www.science.org/doi/10.1126/...

6 months ago 77 35 2 2
Graphic of the AMS x AGU U.S. Climate Collection with a photo of iceberg by pexels.

Graphic of the AMS x AGU U.S. Climate Collection with a photo of iceberg by pexels.

The "U.S. Climate Collection" is now open for proposals! A joint initiative of AMS and @agu.org, the Collection will help sustain the momentum of U.S. climate assessment research.

Learn more and submit your proposal: bit.ly/46JuY71

6 months ago 21 10 0 0
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📢 Submissions are now open for the U.S. Climate Collection, a joint @theAGU + @ametsoc initiative.

This special collection will publish U.S.-focused climate assessment science that’s free to read, ensuring rigorous, accessible science informs decisions for years to come.

🔗 buff.ly/1tHUSLC

6 months ago 33 22 2 1
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7 months ago 2 1 0 0
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As a Ph.D. student, I felt unprepared to mentor—but I’m glad I took the leap “I could help even when I did not have a solution,” this scientist learned

"my mentee sent an email thanking me for my support and guidance, which she said helped increase her confidence. She probably doesn’t know that she helped increase my confidence, too."
www.science.org/content/arti...

7 months ago 2 0 0 0
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FEATURE ARTICLE • Mentors: The Hidden Beneficiaries of Mentoring | Oceanography

"mentorship is a two-way exchange that energizes and inspires all participants to become active agents of change"
tos.org/oceanography...

7 months ago 5 3 3 0

That's when the magic happens, and you know it. Do it for one more day!

8 months ago 2 0 0 0
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The Executive Order “Restoring Gold Standard Science” is Dangerous for America This EO is an unconstitutional attempt to censor and punish U.S. scientists for publishing science that doesn't fit a political agenda This misleading and false misrepresentation of U.S. scientif...

Editorial published today by the Editors-in-Chief of the @agu.org journals:
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

8 months ago 27 14 2 2

The visible sharpness of the transition between calm and windy is incredible.

8 months ago 2 0 1 0
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The 2023/24 El Niño event exhibited unusually weak extratropical teleconnections - Communications Earth & Environment Extreme sea surface temperature warming in the tropical Indian Ocean and Atlantic in 2023 suppressed the rainfall pattern induced by the 2023/24 El Niño, reducing its tropical and extra-tropical impac...

Big El Niños 🌊 usually come with big 🌎 teleconnections.
The one in 2023/24 didn't. Why?
Rainfall anomalies in the tropical Pacific were suppressed due to greater warming in Indian and Atlantic Oceans.
www.nature.com/articles/s43...
Led by Lei Zhang, with @matcollins.bsky.social
@cires.colorado.edu

8 months ago 14 6 0 0
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Beautiful outflow boundaries making new storms in their wake. #cowx

9 months ago 2 0 0 0
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A new observational benchmark for equatorial upwelling
@usclivar.bsky.social Research Highlight

Our general tendency to underestimate equatorial upwelling may offer a clue into the disagreement between historical trends and climate model simulations of Pacific SSTs.

usclivar.org/research-hig...

10 months ago 5 3 0 0
A rocky, desert landscape with mountainous terrain along the horizon. In the top left, there is a blue box with the CIRES logo and white text: News. Groundwater levels in the US Southwest more sensitive to climate shifts than in the Pacific Northwest.

A rocky, desert landscape with mountainous terrain along the horizon. In the top left, there is a blue box with the CIRES logo and white text: News. Groundwater levels in the US Southwest more sensitive to climate shifts than in the Pacific Northwest.

Groundwater levels in the Southwest & Pacific Northwest responded differently to precipitation changes during the Last Glacial Termination, according to new research led by @whoi.edu‬'s Alan Seltzer & co-authored by CIRES Fellow Kris Karnauskas.

Read the story: cires.colorado.edu/news/groundw...

10 months ago 6 1 1 1
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Major US climate website likely to be shut down after almost all staff fired Exclusive: Climate.gov, which supports public education on climate science, will soon no longer publish new content

Climate.gov, a major US government website supporting public education on climate science, will likely shut down after almost all of its staff were fired. What would be worse is if the website were co-opted to publish climate denial content.

10 months ago 652 351 33 43

Deadline extended by one week... applications due June 22!
@agu.org @eos.org

10 months ago 2 0 0 0
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Pan-Pacific low-frequency modes of sea level and climate variability Coastal sea level records suggest that Pacific Ocean sea level and climate trends are unlikely to persist over the coming decades.

New work led by former CIRES Visiting Fellow Chris Little uncovered 3 distinct spatial patterns in Pacific Ocean tide gauge sea level records. @oceansclimatecu.bsky.social @colorado.edu
www.science.org/doi/10.1126/...

10 months ago 5 1 1 0
Sea level and climate variability in the Pacific Ocean <p>Work led by former CIRES Visiting Fellow Chris Little uncovered 3 distinct spatial patterns in Pacific Ocean tide gauge sea level records:</p><ol><li>A spatially uniform rise, smaller than that fou...

Sea level and climate variability in the Pacific Ocean
Work led by former @cires.colorado.edu Visiting Fellow Chris Little uncovered 3 distinct spatial patterns in Pacific Ocean tide gauge sea level records...
cires.colorado.edu/spotlights/s...

10 months ago 3 0 0 0

185 departures in a day. Up about 50% from this time in 2021. (Nothing to do with the holiday weekend. Last Thursday was just an average day in terms of traffic.)

10 months ago 1 0 1 0

The vast majority are loud, slow-moving, fixed-wing propeller planes flying a few hundred feet above dense residential neighborhoods, parks and schools before returning to RMMA so they can do it again.

10 months ago 1 0 1 0