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ENVS2- the atmosphere > Glossary > Flashcards

Flashcards in Glossary Deck (25):
1

Chemautotroph

An organism that gains its metabolic energy from chemical reactions eg. nitrifying bacteria

2

Ozone

Triatomic oxygen

3

Stratosphere

The layer of the atmosphere that absorbs UV and contains the ozone layer.
it is above the troposphere at an altitude of approx. 6 to 30 miles

4

Dynamic equilibrium

A combination of active processes which cancel out each others effects so there is no overall change

5

Troposphere

The layer of the atmosphere below the stratosphere from ground level to approx. 6 miles altitude

6

Infrared (IR) radiation

Long wavelength electromagnetic radiation emitted from warm objects

7

Nuclear fusion

The release of energy during the joining of hydrogen atom nuclei

8

Electromagnetic radiation

Energy in the form of energy waves with a range of frequencies

9

Global climate change

The various changes to the climate caused by increased energy being retained in the atmosphere as a result of human activities

10

Greenhouse effect

The natural processes by which atmospheric gases allow visible light to pass through but absorb infrared energy, causing heating

11

Enhanced greenhouse effect

An alternative name for global climate change

12

Tropospheric ozone

Ozone in the troposphere, largely produced by human activities

13

El Nino

The name given to the reversal of the equatorial pacific ocean current that normally flows westwards

14

La Nina

The name given to the strengthening of the westward flowing equatorial pacific ocean current

15

Positive feedback mechanism

A situation where an initial change causes a reaction that increases the original change

16

Negative feedback mechanism

A situation where n initial change causes a reaction that decreases the original change

17

Kyoto protocol

The international agreement intended to control emissions of greenhouse gases

18

HFCs

Hydrofluorocarbons are a group of chemicals used of replace CFCs

19

HCFCs

Hydrochlorofluorocarbons are a group of chemicals used to replace CFCs

20

MEDCs

More economically developed countries

21

Anthropogenic

Something made or caused by human activities

22

CFCs

Chlorofluorocarbons are pollutants that cause ozone depletion and contribute to global climate change

23

Infiltration

The process by which surface water enters the ground between particles of soil or rock

24

Ultraviolet (UV) light

High energy electromagnetic radiation including the short wavelength radiation emitted by the sun.
Its energy can cause chemical reactions to take place such as in the ozone layer or sunburn and DNA damage

25

Montreal protocol

International agreement that has controlled the release of ozone depleting substances