Discussion
Which direction does Rossby wave phase always travel relative to the mean flow?
Answer: B
The intrinsic phase speed of a Rossby wave is always westward, with a magnitude proportional to beta and to the square of the wavelength divided by four pi squared. Short waves are carried eastward by the mean flow because their intrinsic speed is small, while long waves may be stationary or retrogressive. Understanding the observed eastward movement as advection overcoming an intrinsic westward propagation is the key point. Framing the question as which quantity the change acts upon makes the answer follow without calculation.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development