Figure 2: Sampling effort to measure variability of salinity and temperature, suspended particulate matter, dissolved oxygen, Chlorophyll-a, and dissolved inorganic nutrients (e.g., phosphate) in San Francisco Bay from 1969–2015.
From: Water quality measurements in San Francisco Bay by the U.S. Geological Survey, 1969–2015
Plots show the number of samples (y-axis) collected at each station, in each month, and in each year.
