Skip to main content

Impact of Air Sea Interaction

Physical interaction between air & sea takes a number of forms-
i.               Ocean circulation/currents: Current systems aid in the exchange of heat between low & high latitudes & are essential in the sustaining the global heat balance. Currents are set in motion predominantly by prevailing winds. The wind transfer energy by the frictional drag of the air blowing over the water surface.
       The conveyor belt of ocean currents is very important in the climate system. Because of its long time scale this cycle provides a stabilizing effect on climate.
ii.              Wave & Wave Breaking: Undulation of surface water of sea by alternate crest & trough is called wave.  
                                           When air moves over water surface, the kinetic energy of air convert to potential energy in wave & finally when wave break also some kinetic energy release in air.
iii.            Salt Water Spray: After breaking waves some salt water molecules spray in atmosphere. It is more dominant phenomena of plunging & surging wave breaking. 
iv.            Upwelling/Downwelling: The upwelling that takes in the polar areas result from the formation of two cold water masse beneath the ice shelves as water freezes to their undersides. The surface water temperature drops as low as -1.9°C.
      Downwelling occurs because of an increase in density. An increase in density can be brought about by pressure & mixing of currents which produce one of the strongest currents.
v.              Cyclones: Cyclones is formed over tropical seas. Winds from opposite directions meet. This air is heated by warm seas & so evaporates moisture from the ocean. This warm air rises up rapidly, cools & condenses to form clouds & produces an area of very low pressure. When moisture & air mix, it makes a collection of thunderstorms from which a cyclone can develop.
vi.            Storm Surges: Strom surges associated with severe tropical cyclones constitute the world’s worst marine hazard. As a result of the storm winds the massive pilling of the sea water occurs at the coast leading to the sudden inundation & flooding of coastal region.
                   Storm surges are extremely serious hazards along the east coast of India, Bangladesh,                    Myanmar.
vii.           ENSO ( El Nino-Southern Oscillation ): ENSO is occurs due to interaction between the atmosphere & ocean in the tropical pacific.
viii.         Climate Change: Climate change due to interaction between the atmosphere & ocean. 

ix.            Maintain Ocean Ecological Balance: Maintained ocean ecological balance by interaction between the atmosphere & ocean. Dissolved gasses is very important for plant & organisms living in water. O2 is important for aquatic plants & CO2 important for photosynthesis of algae. Most gases in the air readily dissolve in seawater at the ocean’s surface. Plants & animals living in the ocean require these dissolved gases to survive. Dissolved nitrogen gas is a conservative component of seawater, while biologically active oxygen & dioxide are non-conservative components.
Fig: Air-sea interaction

Labels:

Comments

Post a Comment

Popular posts from this blog

Behaviouralism in geography

Behaviouralism Behaviouralism is an approach in human geography that came to prominence in the human geography of the 1960s and 1970s. It goes out of the idea that people are the determining factor in the explanation of space. Behaviouralism tries to give an explanation of the spatiallity of human activities. And thereby they use a complex universally applicable model.  Definition of Behaviouralism: The particular aspect with which geographical content is analyzed using mathematical statistics & human sensitivity, is called behavioralism. Concept of Behaviouralism: The Behaviouralism revolution is a theoretical concept. Its theories are not based on assumptions, but are actually explored through ascending methods based on the experience of human behavior. An analysis of the significance of geographical issues in behavioral perspectives within a system, so therefore is no definite boundary to behavioral geography. The main purpose of behaviouralism geography is to invest
Post a Comment
Read more

Positive and Negative Impact of Tide

Tide has many effects on human life. The impact of tide discuss below- Positive Impact of Tide: Shipping:  Tides are helpful in making rivers navigable for large vessels. During the high tide, the amount of river water & height of river water increases. At that time, large vessels/ships can easily come to rive port. Again, during the low tide, ships can be returned from port to sea.  For example - London & Kolkata have become important ports because of the tidal waves in the Thames & the Hooghly rivers respectively. Pollution-free Environment:  When tidal water flows, rivers are free of garbage. As a result, the environment is not pollutant near the river areas. Obstruction of Sediments deposited & Delta Formation:  As a result of the tide, sediments not to deposited & prevents delta formation.  For example-  In the Sundarbans, small creeks are capable of navigating during tides.  Regular Water flow:  During the tide, sea salt water enters the river
Post a Comment
Read more

Deep-Ocean Basin

Abyssal Plain:  Abyssal plains is an underwater plain on the deep ocean floor, usually found at depths between 3000 metres & 6000 metres. Characteristics: a)       Abyssal plain is the most extensive relief zone of the ocean floor. b)      The average slope gradient is almost 0.5ᵒ. c)       It covers nearly 40% of the ocean floor. d)      It is flat & rolling submarine plain. Abyssal Hill:  Abyssal hills a small hill that rises from the floor of an abyssal plain. Characteristics: a)       Covering more than 30% of the ocean floor. b)      Height of this hill is less than 100m. Seamounts: Seamounts is an volcanic projections that developed above the abyssal plains that do not rise above the surface of the sea. Characteristics: a)       Seamounts are circular or elliptical. b)      Height is of less than 1 km. c)       Relatively steel slops of 20ᵒ-25ᵒ. d)      Seamounts may be found alone or in groups of from 10 to 100. Guyots:  Guyots are
Post a Comment
Read more