Nitrate sensors measure the concentration of nitrate, a major nutrient for phytoplankton.
In most oceans, phytoplankton grow until they have used up all of the nitrate or all of the phosphate. In several regions, HNLC (high nutrient low chlorophyll) conditions occur where nutrients like nitrogen are not completely used up by phytoplankton but rather their growth is limited by chlorophyll. Thus, it is an important variable for ecosystem studies.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
Click the instrument categories below for descriptions and lists of instruments belonging to that category.