California Nexus Research

Project Description
CalNex, the California Nexus: Research at the Nexus of Air Quality and Climate Change project was a joint effort of the California Air Resources Board (CARB), the National Oceanic and Atmospheric Administration (NOAA) and the California Energy Commission (CEC) to study of atmospheric processes over California and the eastern Pacific coastal region in 2010. This study emphasized the interactions between air quality and climate change issues, including those affecting the hydrologic cycle. It constited of a series of comprehensive regional air quality and climate assessments conducted by NOAA and an expansion of CARB’s leadership of California air quality studies. It complemented the ongoing CEC regional climate change studies.

CalNex consisted of in-situ measurement of chemical species from aircraft, ship and ground stations, scanning lidar ozone mapping, and chemical modeling during May and June of 2010. More information is available at or

Ryerson et al. (2012), Overview of the 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study, J. Geophys. Res., CalNex special issue, submitted.