Variability in surface water productivity in the central Gulf of California during the Medieval Climate Anomaly and Little Ice Age

Valerie Schwartz1, John Arthur Barron1, Jason A Addison2 and David Bukry3, (1)USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States, (2)USGS Volcano Science Center Menlo Park, Menlo Park, CA, United States, (3)USGS, Menlo Park, CA, United States