Attention: The 2025 ARM/ASR joint meeting website is now live! Breakout session requests are due by Wednesday, December 4.

For Warm Boundary Layer Processes, an ASR Working Group

A confederation of experts considers the latest science on the workings of boundary layer processes.

To Study Aerosols, an ASR Working Group

New particle formation, aerosol aging, and a long list of related issues captivate a changing cast of collaborative experts.

ASR FY2025 Funding Opportunity Announcement

DOE will provide $6 million in new research grants for Atmospheric System Research (ASR) program science.

2025 ARM/ASR Joint Meeting

Save the Date for the 2025 ARM/ASR Joint Meeting: March 3–6, 2025, in Rockville, Maryland.

Ahead in the Clouds

ASR scientist builds custom chamber helping uncover how aerosol particles and clouds contribute to Earth’s changing climate.

The U.S. Department of Energy’s Atmospheric System Research program advances process-level understanding of the key interactions among aerosols, clouds, precipitation, radiation, dynamics, and thermodynamics, with the ultimate goal of reducing the uncertainty in global and regional climate simulations and projections.

Research Highlights

Particles in motion: tracking aerosols with precision and a touch of randomness

Particle-resolved aerosol modeling is a powerful tool in aerosol research because it captures [...] Read more

Simulations reveal details of mixing of a cloud with dry air

When environmental air becomes trapped in a cloud, a process known as entrainment can affect [...] Read more

Improving low-cloud fraction prediction through machine learning

Low clouds impose a strong radiative cooling effect on Earth’s climate. Predicting low-cloud [...] Read more

Recent Publications

The influence of cloud cover on the reliability of satellite-based solar resource data

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Direct measurement of the growth of small particles in ambient air using captive aerosol chambers

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Use of physics to improve solar forecast: Part Ⅲ, impacts of different cloud types

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Upcoming Meetings

105th American Meteorological Society Annual Meeting

12 January 2025 - 16 January 2025

The 105th American Meteorological Society Annual Meeting will take place from 12 to 16 January 2025 [...] Read more

CAPE-k Student Workshop

2 February 2025 - 7 February 2025

The Atmospheric Radiation Measurement (ARM) user facility will co-host a student workshop with the [...] Read more

2025 Joint Atmospheric Radiation Measurement (ARM) User Facility/ASR Principal Investigators Meeting

3 March 2025 - 6 March 2025

The Atmospheric Radiation Measurement (ARM)/Atmospheric System Research (ASR) Joint User [...] Read more