Latitudinal variations, Biology

Assignment Help:

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


Related Discussions:- Latitudinal variations

What is molecular formula of the compound, A solid compound was found to co...

A solid compound was found to contain 42.11% C, 51.46%O and 6.43% H by weight. The molecular weight of the compound was 341. What is the molecular formula of the compound?

The Human Inpact on the Environment, Name the four organisms which are curr...

Name the four organisms which are currently in danger of extinction because of human activities?

Can a chemical reaction the free energy change to mol, In a chemical reacti...

In a chemical reaction the free energy change (/\Go') is -40 jk/mol and the entropy factor T/\S is 15 kj/mol. the enthalpy change /\H for the reaction is a. 25 kj/mol b.-25 k

Social health insurance systems, Normal 0 false false false...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain nutrition diagnosis, Explain Nutrition diagnosis Nutrition dia...

Explain Nutrition diagnosis Nutrition diagnosis is the identification and labelling that describes an actual occurrence, risk of, or potential for developing a nutrition probl

Can you define termination of the stress test, Q. Can you define terminatio...

Q. Can you define termination of the stress Test? Test should be terminated when: 1) PVCS develop in pairs or with increasing frequency or when ventricular tachycardia devel

The rate of germination, You are asked to set up an experiment to investiga...

You are asked to set up an experiment to investigate the effect of temperature on the rate of germination. You place ten soaked peas in every of three flower pots containing moist

Determine about the microtubules, Determine about the microtubules The...

Determine about the microtubules The microtubules are hollow tubular structures formed by a special arrangement of two proteins called the alpha and beta tubulins. The microtu

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd