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/… ATOC at CU-Boulder INSTAAR 🏳️‍🌈 CIRES CU Boulder 🦬 NSF National Center for Atmospheric Research Humboldt-Stiftung

🧊🌊 ARCTIC SEA ICE ALERT - First ice-free day could occur over 10 years earlier than previous projections. Check out a new review paper in Nature Reviews Earth & Environment 🌈 by Alexandra Jahn (INSTAAR & ATOC at CU-Boulder), Marika Holland (NSF National Center for Atmospheric Research CGD) & Jennifer Kay (ATOC & CIRES)

New study by ATOC Profs. Alex Jahn Dr. Alexandra Jahn and Jen Kay Jen Kay warns the Arctic could see its first ice-free summer days within years, far sooner than expected.

Thursday's ATOC Distinguished Lecture Series has been cancelled due to adverse weather forecast. We apologize for any inconvenience.

🧊 ARCTIC SEA ICE ALERT 🌊 First ice-free day could occur over 10 yrs earlier than previous projections. New review by Alexandra Jahn Dr. Alexandra Jahn (INSTAAR & ATOC at CU-Boulder), Marika Holland (NSF NCAR Climate and Global Dynamics Laboratory), & Jennifer Kay (ATOC & CIRES) CU news story: colorado.edu/today/2024/03/…

Check this new paper “Synoptic and planetary-scale dynamics modulate Antarctic atmospheric river precipitation intensity” led by our own graduate student Becca Becca and Prof. Winters Andrew Winters

👏👏👏Congratulations to Carl Hager for winning 2024 Marinus Smith Award for Teaching at CU Boulder (colorado.edu/orientation/ma…)

Climate models are improving in their representation of modes of internal variability, as revealed here with large ensembles, which are an essential resource for evaluating model fidelity and inter-model differences. See new paper led by our Dr John Fasullo (journals.ametsoc.org/view/journals/…)

🚨New paper alert🚨“A Global Gridded Dataset for Cloud Vertical Structure from combined CloudSat and CALIPSO observations” led by our own graduate Leah Bertrand incl. Prof. Kay doi.org/10.5194/essd-1…

🚨New paper alert 🚨“Chemistry Contribution to Stratospheric Ozone Depletion After the Unprecedented Water-Rich Hunga Tonga Eruption” by Zhang et al. incl. Prof. Wang agupubs.onlinelibrary.wiley.com/doi/full/10.10…

🚨New paper alert 🚨“Tropical Atmospheric Intraseasonal Oscillations Leading to Sea Level Extremes in Coastal Indonesia during Recent Decades” led by our own graduate student William Kamp journals.ametsoc.org/view/journals/…

Study by our grad student Dave Rosencrans w. Prof Dr. Julie Kay Lundquist, Ph.D. @nrel_mechtherm shows that offshore turbines could reduce farms’ power output by over 30% due to wake effects. Yet, these proposed farms could cover 60% of New England's electricity demand colorado.edu/today/2024/04/…

Find more details in this paper wes.copernicus.org/articles/9/555…

Recently produced DOE and NCAR climate model large ensembles illustrate the opportunity they provide to quantify climate responses, identify model improvements, and highlight the inability of models to reproduce the observed recent increase in Earth's Energy Imbalance John Fasullo

See this new paper "An overview of the E3SM version 2 large ensemble and comparison to other E3SM and CESM large ensembles" led by our John Fasullo esd.copernicus.org/articles/15/36…

A big congrats to the 2024 #CESM award winners 🥳 Jim Edwards received the CESM Distinguished Achievement Award and Samuel Mogen the CESM Graduate Student Award. Thanks for all of your great contributions!!

👏👏👏Congratulations to Samuel Mogen for winning 2024 CESM Graduate Student Award!

🚨New paper alert🚨 “Synoptic-scale Meteorological Patterns Associated with Heavy Rainfall in the Minnesota Region” led by our own graduate student Rory Laiho w. Profs. Friedrich and Winters. journals.ametsoc.org/view/journals/…

👏👏👏Congratulations to Leah Bertrand for winning 2024 CIRES Graduate Student Research Award for work on quantifying and communicating Arctic cloud responses to warming with spaceborne radar and lidar (cires.colorado.edu/recognition/20…)! CIRES