Dear All, Greetings for the day from Andaman!
Kindly help me with the satellite data download link for Bay of Bengal pertaining to oceanic currents, Sea surface temperature, chlorophyll, wind, and salinity data.
Remote sensing is a method of collecting data without direct contact with the medium. Satellites are one remote sensing platform. Satellites are equipped with instruments that can make measurements of the ocean, including water color, sea surface height and the intensity of local gravity. Temperature of oceans is of great significance as it supports all life forms, their types and distribution at various depths in the oceans. Temperature controls the movement of large volume of ocean water. Sun is the major source of temperature of ocean water. Satellite altimetry is all about timing. Sea-surface height can be measured by the time it takes for radar pulses to hit the ocean surface and bounce back to the spacecraft. Laser altimetry works in a similar manner, as laser pulses bounce off land-ice and sea-ice surfaces. Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface. Cold ocean currents tend to reduce the temperature of the warmer areas and similarly warm currents tend to enhance the temperature of colder regions. Sea surface temperatures greatly modify air masses in the Earth's atmosphere within a short distance of the shore. Local areas of heavy snow can form in bands downwind of warm water bodies within an otherwise cold air mass. Warm sea surface temperatures can develop and strengthen cyclones over the ocean. However, ocean currents also flow thousands of meters below the surface. These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). Places where chlorophyll amounts were very low, indicating very low numbers of phytoplankton are blue. Places where chlorophyll concentrations were high, meaning many phytoplankton were growing, are dark green. Chlorophyll concentration maps display the quantity of plankton and other plant life in the surface layer of the ocean. The amount (or concentration) of chlorophyll a in surface waters can be calculated by measuring the color of the water (also referred to as “ocean color”). Satellite sensors measure water color, similar to how your eyes see the color of the ocean. Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar. Salinity affects almost all aspects of plant development including: germination, vegetative growth and reproductive development. Soil salinity imposes ion toxicity, osmotic stress, nutrient (N, Ca, K, P, Fe, Zn) deficiency and oxidative stress on plants, and thus limits water uptake from soil.
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