2.12 Flashcards
1
Q
How many times do tides occur per day?
A
Twice
(2 low, 2 high)
2
Q
How does the daily tide happen?
A
- Moons gravitational field pulls on water as Earth rotates
- Bulge occurs on opposite side due to inertia
3
Q
When does the spring tide happen?
A
- Every 2 weeks
- Sun+Earth+Moon are aligned
- Large pull on water -> tide is higher
4
Q
When does the perigean tide occur?
A
- 4 times per year
- Moon+Sun+Earth in alignment
- Moon is closest to Earth
5
Q
What is the neap tide?
A
- weakest high tide
- Sun + Moon are at 90º to each other
6
Q
What conditions to anticyclones bring?
A
- High pressure
- Calmer conditions
- Smaller waves
7
Q
What conditions do depressions bring?
A
- Low pressure
- Fast winds
- Destructive waves
8
Q
What happens in the positive phase of the North Atlantic Oscillation?
A
Low pressure in North
- Wet and warm in North
High pressure South
- Dry in South
9
Q
What happens in the negative phase of the North Atlantic Oscillation?
A
Low pressure in North
- Wet and warm in South
High pressure South
- Dry in North
