Precipitation, Aerosols, and Pacific Atmospheric Rivers Experiment
photo by Jessie Creamean
CalWater is a field campaign focusing on two key phenomena that play key roles in the variability of the water supply and the incidence of extreme precipitation events along the West Coast of the United States. These phenomena include the role of:
  1. Atmospheric Rivers (ARs) in delivering much of the water vapor associated with major storms along the U.S. West Coast, and
  2. Aerosols from local sources as well as those transported from remote continents—and their modulating effects on western U.S. precipitation.

Observation Platforms

The CalWater 2/ACAPEX observational strategy will use high- and low-altitude aircraft, a ship with the AMF2, and a ground-based network.

Terrain Base Map

Terrain base map of northern California showing wind profiler sites and S-PROF radars operation during the HMT and CalWater field campaigns (pink circles and red triangles, respectively).

Recent News and Announcements

3 November 2014 – CalWater Special Session to be held on December 17th at AGU Fall Meeting in San Francisco, CA link to pdf
31 October 2014 – A CalWater 2015 – ACAPEX Campaign Planning Workshop will be held November 5-7, 2014, at Scripps Institution of Oceanography, La Jolla, CA pier image from Scripps