# part1 (2) Flashcards

1
Q

symbol U represents

A

Horizontal velocity

10m/s

2
Q

symbol W represents

A

vertical velocity 0.01 m/s

3
Q

symbol L represents

A

horizontal distance 106 m

4
Q

Symbol H represents

A

vertical distance 104 m

5
Q

symbol P represents

A

pressure change

horizontal 103pa

vertical 105 pa

6
Q

symbol t represents

A

time t=L/U

105sec

7
Q

density

A

1 kg/m3

8
Q

kinematic viscosity

A

1.46x10-5 m2/s

9
Q

omega

A

10
Q

latitude

A

45º

11
Q

A

6.378 x 106​ m

12
Q

measure of geostrophy

A

the extent to which the flow is in geostrophic balance

13
Q

scale analysis for acceleration

A
14
Q

corriolis scale analysis

A
15
Q

A
16
Q

corriolis scale analysis (not ratio)

A
17
Q

For synoptic-scale motions, scale analysis reveals that the dominant terms in the horizontal momentum equation are

A

the pressure gradient force and Coriolis terms

18
Q

For synoptic-scale motions, scale analysis reveals that the dominant terms in the horizontal momentum equation are the pressure gradient force and Coriolis terms.

For the limiting case where these two terms are in exact balance known as

A

geostrophic balance

19
Q

the geostrophic wind, which is oriented

A

parallel to isobars with lower values to the left (right) in the Northern (Southern) Hemisphere.

20
Q
A

the vector and scalar expressions for flow that is in exact geostrophic balance

21
Q

hydrostatic equation

A

assumption to replace the vertical momentum equation

22
Q
A

hydrostatic equation, balance between the vertical pressure gradient force and gravitational acceleration

23
Q

the vertical motions which do arise, are the result of

A

small imbalances between these largely cancelling vertical forces

24
Q

Some numerical weather prediction (NWP) models, such as the Global Forecast System (GFS) model in the United States, are currently ………………………………models,

A

hydrostatic

25
Q

Some numerical weather prediction (NWP) models, such as the Global Forecast System (GFS) model in the United States, are currently hydrostatic models, meaning that they do not explicitly solve the

A

vertical momentum equation

26
Q

in the global forecast system , the vertical motion is obtained diagnostically, from the

A

continuity equation

27
Q

An often-overlooked aspect of the continuity equation is that atmospheric mass is

A

not conserved

28
Q

. The source and sink terms are most important during……………………………, for example, during a ……………………

A

heavy precipitation, tropical cyclone

29
Q
A

continuity equation

30
Q

first law of thermodynamics is known as

A

conservation of energy or thermodynamic energy equation

31
Q
A

first law of thermodynamics

32
Q

explain each term

A

dq is the heat added or subtracted from the mass,

du is the change in internal energy, and

dw is the increment of work done by the air parcel.

33
Q
A

another expression for the first law of thermodynamics

34
Q
A

first law of thermodynamics using hydrostatic equation