Latitudinal variations, Biology

Latitudinal Variations

The latitudinal variation of temperature over the earth is the result of two main variables

  • incoming solar radiation and
  • the distribution of land and water masses

 

What do you think could be the other factors influencing temperature?

The movement of wind and water, and the direction of slopes of hills and mountains also modify the temperature.

We know that the length of the day varies at higher latitudes. That means the incoming solar radiation varies. However, if we compute the average, every point on the earth gets the same total hours of daylight each year, an average of 12 hours per day, but not the same amount of heat. The latter depends upbn the amount of radiant energy delivered/unit area/hr and this depends upon the angle of landing sunlight. You have learnt in the previous section that vertical beams afe more intense than the oblique beams that land on the higher latitudes. Hence we find a gradual decrease in the amount of incident radiant energytunit area along the increasing latitudes, horizontally.

On the basis of temperature variation three distinct heat zones can be distinguished in each hemisphere (Figure shown below). The hot torrid zones are near the equator. moderate or temperate zones are in the middle, the cold zones are at the poles. Each zone is characterised by typical plants and animal populations found in the area.

1963_heat zones.jpg

Posted Date: 12/10/2012 6:26:55 AM | Location : United States







Related Discussions:- Latitudinal variations, Assignment Help, Ask Question on Latitudinal variations, Get Answer, Expert's Help, Latitudinal variations Discussions

Write discussion on Latitudinal variations
Your posts are moderated
Related Questions
Q. Illustrate Natural and Phylogenetic Classification? Natural Classification Natural systems of classification reflect the situation as it might have existed in nature. T

Formation of Aqueous  Humour It  is  universally accepted that the aqueous  is  produced  by  the  ciliary processes. Although a great deal of  research has been done on the fo

Explain Red anthocyanin pigments Red anthocyanin pigments from miracle fruit were isolated and tested in carbonated beverages, in combination with the organic acids. Pigments d

Define the Insulin resistance - Obesity? Insulin resistance is a condition in which your body cells cannot utilize insulin efficiently although sufficient amounts are secreted


Explain Functional property of Emulsification Mode of action  Proteins stabilize fat emulsions Food system Sausages, soups, cakes, salad dressings, infant foods

Q. Which is the form of protozoan reproduction that generates more variability? Sexual reproduction always generates extra genetic variability than asexual reproduction. That i

Define the Psychological problems - Effect of Obesity? Obese people may be exposed to ridicule and discrimination in areas like employment, promotions and social interactions.

MOSAI C THOERY - It was given by W. Roux. He studied the development of frog's egg. He destroyed one cells by a hot needle out of 2-cells formed as a result of first cleava

Oil seed meals as source of limiting amino acids Generally ruminants are not perceived to have a requirement for essential amino acids as the rumen microbes can synthesis esse