Climate Action Solutions Business Incubator Award

The Weiss Lab at UC Santa Cruz was awarded a grant to develop products and a marketplace for fog water harvesting.

Learn about our projects through this video.

Dr. Peter Weiss and his students explain their accomplishments from the summer of 2023 where they built a Large Fog Collector and a Fog Tree at the UCSC Farm. Their end of the fog season celebration called Fog Fest was celebrated in October of 2023.

Hotspots for Fog Water Harvesting

Fog water is available for harvest on our foggy California coast, as shown by the Coastal Low Clouds and Fog (CLCF) frequency map below. Using these data plus wind speeds and elevation we can predict where the fog water harvesting hot spots are. This modeling work is some of the current research happening in the Weiss Lab.

Multiyear summertime mean GOES-West satellite data of low clouds and fog (CLCF) (courtesy of Rachel Clemsha, Scripps Institute of Oceanography)

Large Fog Collector (LFC) – Atmospheric Water Harvesting for Veggie Garden Irrigation

The passive LFC can collects fog water from the air and directs this water to an irrigation system. Our demonstration Fog Garden at the UCSC Farm consists of 24 vegetable plants. In the summer of 2023, the fog water collected supplied 37% of our garden’s water needs.

The Fog Garden

We have collected 46 gallons of water since Jun 15 (61 days). It’s only 0.11 L/m2/d, far below the threshold for a fog supersite (~1 L/m2/d). Santa Cruz is in a partial fog shadow due to the southerly exposure to the ocean. Northwest is the best. Despite the reduced liquid water content of the air, we have collected enough water to make a meaningful difference in the growing of our vegetable garden.