Skip to main content

Different Types of Tide

Tides are periodic, short-term changes in the height of the ocean surface at a particular place caused by a combination of the gravitation force of the moon & sun & the motion of the Earth.

  1. Sparing Tides:When the moon, sun & earth are located along the same line, then the attraction power of the moon & sun is intense. For this high tide is created, this types tide is called sparing tides.
Fig: Sparing Tide

  1. Neap Tides:When the sun & moon are at a 90° angle to the earth, then their rotation is reduced to earth. Because the moon & the sun do not draw the opposite direction, so the tidal velocity decreases. And its height is lower than the normal tide. That types tide known as neap tides.
    Fig: Neap Tide
  2. Tropical & Equatorial Tides:When the moon is perpendicular to the tropic of cancer, then the force of attraction is relatively high & created high tide. This tide occurs twice in a year. This types tide is known as tropical tides. Again, when the moon is perpendicular to the equator, then high tide occurs. In the equatorial region, two high & two low tides is occurs in a month. This type tide is known as equatorial tides.
  3. Apogee & Perigee Tides:When distance between the earth & the moon decreases, the attraction of the moon naturally increases. At this time the tidal height is 15-20% higher than the normal tidal height. This types tide is known as perigee tides. Again, when the distance between the earth & the moon increases, the attraction of the moon naturally decreases. At this time the tidal height is 15-20% lower than the normal tidal height. This types tide is known as apogee tides.
  4. Daily Tides:Daily tides is occurs 24 hours 52 minutes interval.
  5. Semidiurnal Tides:Semidiurnal tide occurs twice in a day. That’s means it occurs 12 hour interval in a day. 
  6. Equinoctial Spring Tides:Equinoctial spring Tides is occurs every six months interval due to the earth rotates the sun
  7. Monthly Tides:Monthly Tides is occurs due to rotation of earth & location of its Perihelion & Aphelion.
  8. Yearly Tides:Yearly Tides is occurs due to rotation of earth & location of its Perihelion & Aphelion.
  9. Mined Tides:Mined Tides is occurs due to combination of daily & semi-daily tides.
  10. Mixed Tides:Mixed Tides is located at the Indian ocean & some parts of the Atlantic ocean.
Fig: Tide‹


Conclusion: Tides are always dynamic. Tides mainly occurs attraction force among the Moon, the Earth & the Sun. Tides mainly depends on the time & situation.
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

Responses to hazard

Responses to hazard:  Preparedness,  Trauma and aftermath,  Resilience and capacity development Responses to hazard A hazard is an agent which has the potential to cause harm to a vulnerable target. Hazards can be both natural or human induced. According to Alexander (2000, p. 7), “a  hazard is an extreme geophysical event that is capable of  causing a disaster.” The word “extreme” is used here to signify a substantial departure  (either in the positive or the negative direction) from a mean or a trend. Although Alexander did not specify the distinction between these two terms in his definition, it does suggest that hazards may transform into disasters and thus become sequential events. That is, every disaster starts with a hazard (Thywissen, 2006). Hazards are harmful to people, but it fails  to recognize people’s role in causing or  amplifying the impacts associated with hazards. For example, floods can originate either from a natural variability in meteorolo
Post a Comment
Read more

Cyclone: Factors, vulnerability, consequences and management

A cyclone is a vast, violent whirl in the atmosphere which moves from the high seas towards the coastal areas. A cyclone will often bring with it heavy rains that can cause flooding. In order for a cyclone to form, the ocean waters need to be warm, at least 26°C. Above the warm ocean, water evaporates and forms clouds. If there is low air pressure where the clouds are formed, it pulls them in and they begin to rotate. It is the earth rotating and spinning on its axis that causes  the cyclone’s clouds to rotate. Cyclones are caused by atmospheric disturbances around a low -pressure area distinguished by swift and often destructive air circulation. Cyclones are usually accompanied by violent storms and bad weather. The air circulates inward in an anticlockwise direction in the Northern hemisphere and clockwise in the Southern hemisphere. Cyclones are classified as: (i) extra tropical cyclones (also called temperate cyclones); and (ii) tropical cyclones. Fig: Major Disaster in Indi
Post a Comment
Read more