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Observing and Modeling the Sun-Earth System

What We Do

Upcoming Events

Colloquium: The Temperature Anisotropy and Helium Abundance Features of Alfvénic Slow Solar Wind Observed by Parker Solar Probe, Helios, and Wind Missions - Jul 2, 2025
Colloquium: The Striated Solar Photosphere Observed at 20-km Resolution - Jul 9, 2025
Colloquium: Parker Solar Probe Flies through an Eruption-associated Magnetic Reconnection Current Sheet in the Solar Corona - Jul 16, 2025

Latest News

High-resolution view of the event provided by DKIST/VBI

Scientists at NSF and NSF NCAR capture extremely detailed view of a microflare

Jun 24, 2025

NSF UCAR highlights new research that uses unparalleled data from the National Science Foundation (NSF) Daniel K. Inouye Solar Telescope (DKIST). HAO's Robert Jarolim is one of the authors.

HiWind team posing in front of gondola.

HAO's HiWind Balloon has Launched

Apr 17, 2025

Yesterday, the weather conditions in Wanaka, NZ proved favorable for a successful HiWind (SN11) launch. The HAO staff received this news with great jubilation. We are proud and grateful for your achievement! 
 

Holly Gilbert portrait from SPD announcement

Holly Gilbert awarded the 2025 Irene González Hernández Prize

Jan 15, 2025

HAO is proud to announce that our director, Holly Gilbert, is the recipient of the 2025 Irene González Hernández Prize. As quoted from the SPD website announcement..."The Irene González Hernández Prize, established in 2024, celebrates mid-career scientists for transformative contributions to solar research, leadership, and community service." Congratulations Holly!

More News >>

Latest Research Highlights

Impact of increasing greenhouse gases on the ionosphere and thermosphere

Impact of increasing greenhouse gases on the ionosphere and thermosphere response to a May 2024-like geomagnetic superstorm

Jun 24, 2025

N. M. Pedatella, H. Liu, H.-L. Liu, A. Herrington, and J. McInerney focus on understanding how changes in the background state of the upper atmosphere due to increases in CO2 alter the response of the ionosphere and thermosphere to geomagnetic storms finding that increasing levels of CO2 generally result in a weaker response of the ionosphere and thermosphere to geomagnetic storms in absolute terms, while their relative responses enhance at higher CO2 levels.

interhemisphere coupling simulated by WACCM6

Seasonal and Interannual Variation of the Interhemispheric Coupling during the Austral Winter in WACCM6

Jun 24, 2025

Dai Koshin, Nick Pedatella, and Anne Smith describe the coupling between the winter stratosphere in the Southern Hemisphere and the northern upper mesosphere as seen in a long-term whole atmosphere model simulation revealing interannual variation is associated with the phase of the intraseasonal oscillation in the equatorial mesosphere and lower thermosphere.

Global-scale toroid patterns

Mother's Day Superstorms: Pre- and Post-storm Evolutionary Patterns of AR 13664/8

Jun 24, 2025

Mausumi Dikpati, Marianna B. Korsos, Aimee A. Norton, Breno Raphaldini, Kiran Jain, Scott W. McIntosh, Peter A. Gilman, Andre S. W. Teruya and Nour E. Raouafi analyzed active region (AR) 13664 during a superactive emergence event. They conclude that this superstorm was caused by enhanced magnetic complexity occurring due to intricate interactions among multiple active regions emerging at nearly the same locations. 

More Highlights >>

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This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.