Greenhouse effects
Download
1 / 17

GREENHOUSE EFFECTS - PowerPoint PPT Presentation


  • 115 Views
  • Uploaded on

GREENHOUSE EFFECTS. GROUP’S MEMBERS: Noor Syazlin bt Naim Sariah bt Mohd Salleh Nur Aa’in Mazura bt Che Mahtar. What are greenhouse gases?. Global warming. Global warming potential (GWP). is a measure of how much a given gas can contribute to global warming over a given time period .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' GREENHOUSE EFFECTS' - ena


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
Greenhouse effects

GREENHOUSE EFFECTS

GROUP’S MEMBERS:

Noor SyazlinbtNaim

SariahbtMohdSalleh

NurAa’inMazurabtCheMahtar




Global warming potential gwp
Global warming potential (GWP)

  • is a measure of how much a given gas can contribute to global warming over a given time period.

  • It is measured relative to carbon dioxide



Greenhouse gases compared
Greenhouse gases compared

The contribution of a greenhouse gas to global warming depends on its global warming potential (GWP) and the amount of that gas present in the atmosphere.

GWP

Greenhouse gas

Average % of atmosphere

After 20 years

After100 years

water vapour

1–4

carbon dioxide

0.038

1

1

methane

0.0002

72

25

nitrogenmonoxide

0.00003

289

298





Positive effects
POSITIVE EFFECTS

  • The next ice age may be prevented from occurring.

  • Northwest Passage through Canada's formerly-icy north opens up to sea transportation.

  • Less need for energy consumption to warm cold places.

  • Fewer deaths or injuries due to cold weather.


Negative effects
NEGATIVE EFFECTS

  • Increase in average global temperatures (AVT)

    - The AVT has increased by 0.6◦C over 140 years.

    - The climate could increase up to 6◦C in the next 150 years.


NEGATIVE EFFECTS

b) Shrinking ice caps

- The artic sea ice has decreased in area by 38% since 1979.

- This melting is caused by rising temperature.

- Leads to loss of animal habitats (eg: polar bear)


Negative effects1
NEGATIVE EFFECTS

c) Rising sea level

  • Global average sea levels has risen 5cm in 1992.

  • This is at least partly due to melting ice caps.

  • It leads to an increase in flooding.


Negative effects2
NEGATIVE EFFECTS

d) Extreme local weather conditions

  • Local weather patterns are changing, with increasing incidences of extreme weather

  • Eg: flooding , storms, droughts




ad