2.1
This presentation is the property of its rightful owner.
Sponsored Links
1 / 22

2.1 Energy Relationships and The Biosphere PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on
  • Presentation posted in: General

2.1 Energy Relationships and The Biosphere. Flow of Energy in the Biosphere. The biosphere is maintained by a constant flow of energy from the sun Net radiation budget is the difference between incoming and outgoing solar radiation. Energy Relationships and the Biosphere.

Download Presentation

2.1 Energy Relationships and The Biosphere

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


2 1 energy relationships and the biosphere

2.1 Energy Relationships and The Biosphere


Flow of energy in the biosphere

Flow of Energy in the Biosphere

  • The biosphere is maintained by a constant flow of energy from the sun

  • Net radiation budget is the difference between incoming and outgoing solar radiation


Energy relationships and the biosphere

Energy Relationships and the Biosphere

(a) Latitude(b) Characteristics of the biosphere

The amount received by a region (isolation) depends on:


Angle of inclination

Angle of Inclination

  • Is the degree by which the poles are titled from the perpendicular plane of orbit


Angle of incidence

Angle of Incidence

  • Is the angle at which the sun’s rays hit the surface of the earth

  • It depends on latitude

  • It is affected by the tilt of the earth axis which is 23.5°


2 1 energy relationships and the biosphere

  • because of the tilt the earth:

    • The suns rays:

      • strike the equator directly …at 0°

      • are less direct at higher latitudes

      • cause uneven heating; resulting in weather conditions

  • There are seasons


Seasons

Seasons

  • Are caused by the tilt of the Earth’s axis

  • Change when the northern hemisphere is:

    • Tilted toward the sun = summer

    • Tilted away from the sun =winter

Summer

Winter


Solstice

Solstice

  • is the shortest and longest day of the year

  • Summer Solstice:

    • is the longest day of the year (most hours of daylight)

    • June 21st

  • Winter solstice

    • is the shortest day of the year

    • December 21


Equinox

Equinox

  • Is when the center of the sun is over the equator

  • Vernal Equinox

    • is the beginning of spring

  • Autumnal Equinox

    • Is the beginning of fall

  • Is when the equatorial regions have 12 hours of daylight and 12 hours of darkness


Solar energy

Solar Energy

  • Is either absorbed or reflected


Solar energy absorbed

Solar Energy Absorbed

  • Can be converted to chemical energy by photosynthesis

  • Drives water cycle


Hydrologic cycle water cycle

Hydrologic Cycle (water cycle)

  • Water evaporates from lakes, oceans, etc. and from plants (TRANSPIRATION)

  • water rises, cools, and condenses

  • it falls to the ground as precipitation

  • whenever water changes phase, thermal energy is either released or absorbed

  • this movement of thermal energy help to keep the average temperature of Earth relatively stable


2 1 energy relationships and the biosphere

Water Cycle


Solar energy reflected

Solar Energy Reflected

  • The amount depends on the albedo of the surface

  • Aledo is the degree to which materials reflect solar radiation

  • Light colors have a high albedo and reflect


2 1 energy relationships and the biosphere

snow, ice, water, clouds

high albedo =

soil, dark rocks, forests, dust

low albedo =


Natural green house effect

Natural Green House Effect

  • Is caused by green house gases in the troposphere trapping heat that is reflected from earth

  • Green house gases

    • Methane

    • Carbon dioxide

    • Water vapour

  • These keep the average global temperature at 25 degrees


2 1 energy relationships and the biosphere

There are 4 Main Greenhouse Gases


2 1 energy relationships and the biosphere

  • Assignment

  • Page 369 # 1-12


  • Login