ARCHIVED CONTENT: In December 2020, the CZO program was succeeded by the Critical Zone Collaborative Network (CZ Net) ×

USDA Forest Service - Pacific Southwest Research Station

CZO Partner Organization

The Pacific Southwest Research Station represents Forest Service Research & Development in the states of California and Hawaii and the U.S.-affiliated Pacific islands. The region has the lowest, driest desert in the country, the highest elevations within the 48 contiguous States, and the wettest tropical forests. It is the home of an abundant diversity of native plants and animals and nearly 50 percent of the nation's threatened and endangered species. PSW scientists conduct a broad array of natural resources research to achieve our mission to "develop and communicate science needed to sustain forest ecosystems and their benefits to society."

The flagship research area of the Southern Sierra CZO is co-located the Kings River Experimental Watersheds (KREW), a set of research catchments operated by the Pacific Southwest Research Station (PSW), USDA Forest Service. The SSCZO foothill site (located at ~400m in elevation) is at the San Joaquin Experimental Range. 



USDA Forest Service

CZO People
CZO Field Areas