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ATOC students gained hands-on experience measuring surface albedo in front of SEEC (Feb, 2026)

A late winter sunset over the Royal Society Range, sea ice in McMurdo Sound and McMurdo Station, Antarctica in September 2025. Photo taken by Professor John Cassano at the end of his Antarctic fieldwork.

Prof. Li sampling snow for atmospheric chemistry research at the CU Mountain Research Station today (Jan 7, 2026).

Prof. Li sampling snow for atmospheric chemistry research at the CU Mountain Research Station (Jan 7, 2026).

ATOC graduate student Ethan Murray at the Ragged Point field station in Eastern Barbados, the main ground observational site during the MAGPIE field campaign.

Somewhere in the central Arctic near 85 deg N, ATOC PhD Candidate Gina Jozef prepares a DataHawk2 drone for a flight on the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition.

Sam Mogen preparing a Conductivity, Temperature, and Depth (CDT) instrument rosette for deployment near the equator with the US GO-SHIP program.

The Gilkey Trench, Alaska. Photo taken by ATOC’s Devon Dunmire from Camp 18 on the Juneau Icefield, where several ATOC graduate students have spent the summer teaching about glaciology and climate science.

Polar stratospheric clouds over Hut Point peninsula, McMurdo Station, Antarctica. Photo taken by Professor John Cassano.

Photo taken by graduate student Michelle Maclennan during her fieldwork in Antarctica in January 2023. A sun halo shines down on the field team’s instruments and science tent on Thwaites Eastern Ice Shelf.

ATOC graduate students volunteering at Earth’s Table, a local non-profit that grows and donates fresh produce to local food banks.

The Department of Atmospheric and Oceanic Sciences (ATOC) at the is committed to providing a world-class, interdisciplinary research and educational environment to examine the dynamical, physical, and chemical processes that occur in the atmosphere and ocean. A major theme is the establishment of a physical basis for observing, modeling, and understanding climate and global change.

The ��ñ�� is located in a region having the greatest concentration of geophysical researchers in the nation and perhaps the world. The proximity of ATOC to this atmospheric and oceanic science excellence is the foundation of our unique philosophy and vision, . The guiding principle of ATOC is to be the focal point for atmospheric and oceanic science education and research training in this geographic region of world-renowned excellence.

��ñ�� has once again earned top global recognition in the 2026 Global Ranking of Academic Subjects (GRAS), ranking #1 in Earth Sciences and #3 in Atmospheric Science. These rankings reflect the remarkable breadth and strength of Earth and atmospheric science research across ��ñ��. This success is truly a collaborative effort, spanning CIRES, INSTAAR, LASP, and departments across the Natural Sciences, where faculty, researchers, staff, and students contribute to world-leading research in Earth and atmospheric sciences. For undergraduate and graduate students, ��ñ�� offers the opportunity not only to learn from leaders in these fields, but also to become involved in cutting-edge research addressing some of the most important questions about our atmosphere, climate, and planet.

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ATOC students gained hands-on experience measuring surface albedo in front of SEEC (Feb, 2026)

A late winter sunset over the Royal Society Range, sea ice in McMurdo Sound and McMurdo Station, Antarctica in September 2025. Photo taken by Professor John Cassano at the end of his Antarctic fieldwork.

Prof. Li sampling snow for atmospheric chemistry research at the CU Mountain Research Station (Jan 7, 2026).

ATOC graduate student Ethan Murray at the Ragged Point field station in Eastern Barbados, the main ground observational site during the MAGPIE field campaign.

Somewhere in the central Arctic near 85 deg N, ATOC PhD Candidate Gina Jozef prepares a DataHawk2 drone for a flight on the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition.

Sam Mogen preparing a Conductivity, Temperature, and Depth (CDT) instrument rosette for deployment near the equator with the US GO-SHIP program.

The Gilkey Trench, Alaska. Photo taken by ATOC’s Devon Dunmire from Camp 18 on the Juneau Icefield, where several ATOC graduate students have spent the summer teaching about glaciology and climate science.

Polar stratospheric clouds over Hut Point peninsula, McMurdo Station, Antarctica. Photo taken by Professor John Cassano.

Photo taken by graduate student Michelle Maclennan during her fieldwork in Antarctica in January 2023. A sun halo shines down on the field team’s instruments and science tent on Thwaites Eastern Ice Shelf.

ATOC graduate students volunteering at Earth’s Table, a local non-profit that grows and donates fresh produce to local food banks.

ATOC Reception at AMS

Tenure-Track Asst Prof Position

An Arctic Expedition

Other News & Events

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ATOC students gained hands-on experience measuring surface albedo in front of SEEC (Feb, 2026)

A late winter sunset over the Royal Society Range, sea ice in McMurdo Sound and McMurdo Station, Antarctica in September 2025. Photo taken by Professor John Cassano at the end of his Antarctic fieldwork.

Prof. Li sampling snow for atmospheric chemistry research at the CU Mountain Research Station (Jan 7, 2026).

ATOC graduate student Ethan Murray at the Ragged Point field station in Eastern Barbados, the main ground observational site during the MAGPIE field campaign.

Somewhere in the central Arctic near 85 deg N, ATOC PhD Candidate Gina Jozef prepares a DataHawk2 drone for a flight on the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition.

Sam Mogen preparing a Conductivity, Temperature, and Depth (CDT) instrument rosette for deployment near the equator with the US GO-SHIP program.

The Gilkey Trench, Alaska. Photo taken by ATOC’s Devon Dunmire from Camp 18 on the Juneau Icefield, where several ATOC graduate students have spent the summer teaching about glaciology and climate science.

Polar stratospheric clouds over Hut Point peninsula, McMurdo Station, Antarctica. Photo taken by Professor John Cassano.

Photo taken by graduate student Michelle Maclennan during her fieldwork in Antarctica in January 2023. A sun halo shines down on the field team’s instruments and science tent on Thwaites Eastern Ice Shelf.

ATOC graduate students volunteering at Earth’s Table, a local non-profit that grows and donates fresh produce to local food banks.

ATOC Reception at AMS

Tenure-Track Asst Prof Position

An Arctic Expedition

Other News & Events

��ñ��