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Flashcards in The Atmosphere Deck (31)
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1

What is the lowest portion of the earth's surface?

Troposphere

2

What happens to temperature in the troposphere?

Decreases with altitude

3

Where is the majority of water vapour, clouds and weather found?

Troposphere

4

What is the tropopause?

Boundary where the temperature no longer decreases with height

5

The altitude and temperature of tropopause?

Approximately 26,500ft (8km) and a temperature of -40 degrees over the poles
AND
59,500ft (18km) and a temperature of -70 degrees over the equator

6

Is the temperature constant in the lower levels of the stratosphere?

Yes, it is called the isothermal layer

7

In the upper stratosphere what occurs with increasing height?

The temperature rises due to the presence of ozone

8

What is an inversion?

When temperature increases with height instead of decreases

9

What does ISA stand for?

International Standard Atmosphere

10

What is the standard environmental lapse rate?

0ft- 36,090ft is 1.98 (Rounded to 2)

11

Height of ISA tropopause?

36.090ft AMSL

12

What is the ISA temp for mean sea level?

15 degrees

13

What is the ISA tropopause temperature?

-56 degrees

14

What are the three ways in which heat can be transferred?

- Radiation
-Conduction
-Convection

15

What is radiation?

Transfer of heat by electromagnetic waves

16

The hotter the body, the ..... the wavelength

Shorter

17

The sun is extremely hot and emits very short wave radiation also known as....

Insolation

18

The earth's surface is much cooler and emits longwave radiation also known as...

Terrestrial

19

What is conduction?

Transfer of heat through contact

20

What is convection?

Transfer of heat through the movement of a body, usually vertically

21

What is the horizontal movement of air called?

advection

22

What is the greenhouse effect?

Due to the longer wavelength of terrestrial radiation; it is more easily absorbed by water vapour and carbon dioxide. Their molecules then radiate heat back to the earth.

23

What does the temperature of the surface depend on?

-Reflectivity of the surface
-Conductivity of the surface
-Specific heat of the surface
-Cloud cover

24

What does diurnal mean?

24 hour or daily variation

25

What are isotherms?

Lines on a weather map joining places having the same temperature

26

When is peak temperature reached?

2pm-3pm

27

When is the lowest temperature?

Around Dawn

28

Do inland or coastal locations have greater diurnal variation?

Inland

29

Why do inland locations have greater diurnal variation?

The high specific heat of the ocean keeps coastal temperatures cooler during the day and warmer at night. Inland the atmosphere heats up more during the day and cools off more during the night.

30

Will wind reduce or increase diurnal variation?

Reduce