Ocean Colour Monitor (OCM)

• Ocm may refer to different things depending on the context. Without additional information, it's impossible to provide specific study notes. Possible meanings and associated general information are described below.

Ocean Colour Monitor (OCM)

• OCM is an ocean color sensor.
• It measures the intensity of light reflected from the ocean in several different spectral bands.
• It provides information about the concentration of various substances in the water, such as chlorophyll, sediments, and dissolved organic matter.
• Data from OCMs are used in a variety of applications.
• These applications include monitoring water quality, studying phytoplankton blooms, and tracking ocean currents.
• OCM data can also aid in fisheries management and climate change research.
• Satellites carrying OCMs include: IRS-P4 (India), and Oceansat-2 (India).

Other possible meanings

• Optical Coating Materials (OCM): Materials used to create thin layers on optical components to modify their reflective or transmissive properties.
• Oxidation catalytic mechanisms (OCM): Chemical processes involved in oxidation reactions using catalysts.
• Organizational Change Management (OCM): A framework for managing the effect of new business processes, changes in organizational structure or cultural changes within an enterprise.

General notes on Ocean Colour

• Ocean color is primarily determined by how sunlight interacts with substances present in the water.
• Phytoplankton, microscopic marine plants, contain chlorophyll, which absorbs blue and red light and reflects green light.
• This gives ocean water a green hue when phytoplankton concentrations are high.
• Other substances, such as sediments and dissolved organic matter, can also affect ocean color.
• Sediments reflect light across the spectrum, making the water appear brownish or yellow.
• Dissolved organic matter absorbs blue light and reflects yellow and green light, resulting in a yellow or brown color.
• Changes in ocean color can indicate important changes in the marine environment.
• For example, an increase in chlorophyll concentration may indicate a phytoplankton bloom.
• Increased sediment levels may indicate erosion or runoff from land.
• Satellites equipped with ocean color sensors provide a valuable tool for monitoring the health of the ocean.